3216 lines
109 KiB
C++
3216 lines
109 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
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** Copyright (C) 2013 Samuel Gaist <samuel.gaist@deltech.ch>
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** Contact: http://www.qt-project.org/legal
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**
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** This file is part of the QtWidgets module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Digia. For licensing terms and
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** conditions see http://qt.digia.com/licensing. For further information
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** use the contact form at http://qt.digia.com/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Digia gives you certain additional
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** rights. These rights are described in the Digia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "qlistview.h"
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#ifndef QT_NO_LISTVIEW
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#include <qabstractitemdelegate.h>
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#include <qapplication.h>
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#include <qpainter.h>
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#include <qbitmap.h>
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#include <qdrag.h>
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#include <qvector.h>
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#include <qstyle.h>
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#include <qevent.h>
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#include <qscrollbar.h>
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#include <qrubberband.h>
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#include <private/qlistview_p.h>
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#include <qdebug.h>
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#ifndef QT_NO_ACCESSIBILITY
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#include <qaccessible.h>
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#endif
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QT_BEGIN_NAMESPACE
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/*!
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\class QListView
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\brief The QListView class provides a list or icon view onto a model.
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\ingroup model-view
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\ingroup advanced
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\inmodule QtWidgets
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A QListView presents items stored in a model, either as a simple
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non-hierarchical list, or as a collection of icons. This class is used
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to provide lists and icon views that were previously provided by the
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\c QListBox and \c QIconView classes, but using the more flexible
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approach provided by Qt's model/view architecture.
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The QListView class is one of the \l{Model/View Classes}
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and is part of Qt's \l{Model/View Programming}{model/view framework}.
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This view does not display horizontal or vertical headers; to display
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a list of items with a horizontal header, use QTreeView instead.
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QListView implements the interfaces defined by the
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QAbstractItemView class to allow it to display data provided by
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models derived from the QAbstractItemModel class.
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Items in a list view can be displayed using one of two view modes:
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In \l ListMode, the items are displayed in the form of a simple list;
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in \l IconMode, the list view takes the form of an \e{icon view} in
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which the items are displayed with icons like files in a file manager.
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By default, the list view is in \l ListMode. To change the view mode,
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use the setViewMode() function, and to determine the current view mode,
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use viewMode().
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Items in these views are laid out in the direction specified by the
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flow() of the list view. The items may be fixed in place, or allowed
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to move, depending on the view's movement() state.
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If the items in the model cannot be completely laid out in the
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direction of flow, they can be wrapped at the boundary of the view
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widget; this depends on isWrapping(). This property is useful when the
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items are being represented by an icon view.
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The resizeMode() and layoutMode() govern how and when the items are
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laid out. Items are spaced according to their spacing(), and can exist
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within a notional grid of size specified by gridSize(). The items can
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be rendered as large or small icons depending on their iconSize().
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\table 100%
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\row \li \inlineimage windowsvista-listview.png Screenshot of a Windows Vista style list view
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\li \inlineimage macintosh-listview.png Screenshot of a Macintosh style table view
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\li \inlineimage fusion-listview.png Screenshot of a Fusion style table view
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\row \li A \l{Windows Vista Style Widget Gallery}{Windows Vista style} list view.
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\li A \l{Macintosh Style Widget Gallery}{Macintosh style} list view.
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\li A \l{Fusion Style Widget Gallery}{Fusion style} list view.
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\endtable
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\section1 Improving Performance
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It is possible to give the view hints about the data it is handling in order
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to improve its performance when displaying large numbers of items. One approach
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that can be taken for views that are intended to display items with equal sizes
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is to set the \l uniformItemSizes property to true.
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\sa {View Classes}, {Item Views Puzzle Example}, QTreeView, QTableView, QListWidget
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*/
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/*!
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\enum QListView::ViewMode
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\value ListMode The items are laid out using TopToBottom flow, with Small size and Static movement
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\value IconMode The items are laid out using LeftToRight flow, with Large size and Free movement
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*/
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/*!
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\enum QListView::Movement
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\value Static The items cannot be moved by the user.
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\value Free The items can be moved freely by the user.
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\value Snap The items snap to the specified grid when moved; see
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setGridSize().
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*/
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/*!
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\enum QListView::Flow
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\value LeftToRight The items are laid out in the view from the left
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to the right.
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\value TopToBottom The items are laid out in the view from the top
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to the bottom.
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*/
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/*!
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\enum QListView::ResizeMode
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\value Fixed The items will only be laid out the first time the view is shown.
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\value Adjust The items will be laid out every time the view is resized.
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*/
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/*!
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\enum QListView::LayoutMode
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\value SinglePass The items are laid out all at once.
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\value Batched The items are laid out in batches of \l batchSize items.
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\sa batchSize
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*/
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/*!
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\since 4.2
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\fn void QListView::indexesMoved(const QModelIndexList &indexes)
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This signal is emitted when the specified \a indexes are moved in the view.
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*/
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/*!
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Creates a new QListView with the given \a parent to view a model.
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Use setModel() to set the model.
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*/
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QListView::QListView(QWidget *parent)
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: QAbstractItemView(*new QListViewPrivate, parent)
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{
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setViewMode(ListMode);
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setSelectionMode(SingleSelection);
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setAttribute(Qt::WA_MacShowFocusRect);
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Q_D(QListView); // We rely on a qobject_cast for PM_DefaultFrameWidth to change
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d->updateStyledFrameWidths(); // hence we have to force an update now that the object has been constructed
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}
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/*!
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\internal
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*/
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QListView::QListView(QListViewPrivate &dd, QWidget *parent)
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: QAbstractItemView(dd, parent)
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{
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setViewMode(ListMode);
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setSelectionMode(SingleSelection);
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setAttribute(Qt::WA_MacShowFocusRect);
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Q_D(QListView); // We rely on a qobject_cast for PM_DefaultFrameWidth to change
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d->updateStyledFrameWidths(); // hence we have to force an update now that the object has been constructed
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}
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/*!
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Destroys the view.
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*/
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QListView::~QListView()
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{
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}
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/*!
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\property QListView::movement
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\brief whether the items can be moved freely, are snapped to a
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grid, or cannot be moved at all.
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This property determines how the user can move the items in the
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view. \l Static means that the items can't be moved the user. \l
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Free means that the user can drag and drop the items to any
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position in the view. \l Snap means that the user can drag and
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drop the items, but only to the positions in a notional grid
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signified by the gridSize property.
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Setting this property when the view is visible will cause the
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items to be laid out again.
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By default, this property is set to \l Static.
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\sa gridSize, resizeMode, viewMode
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*/
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void QListView::setMovement(Movement movement)
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{
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Q_D(QListView);
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d->modeProperties |= uint(QListViewPrivate::Movement);
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d->movement = movement;
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#ifndef QT_NO_DRAGANDDROP
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bool movable = (movement != Static);
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setDragEnabled(movable);
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d->viewport->setAcceptDrops(movable);
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#endif
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d->doDelayedItemsLayout();
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}
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QListView::Movement QListView::movement() const
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{
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Q_D(const QListView);
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return d->movement;
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}
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/*!
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\property QListView::flow
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\brief which direction the items layout should flow.
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If this property is \l LeftToRight, the items will be laid out left
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to right. If the \l isWrapping property is \c true, the layout will wrap
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when it reaches the right side of the visible area. If this
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property is \l TopToBottom, the items will be laid out from the top
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of the visible area, wrapping when it reaches the bottom.
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Setting this property when the view is visible will cause the
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items to be laid out again.
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By default, this property is set to \l TopToBottom.
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\sa viewMode
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*/
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void QListView::setFlow(Flow flow)
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{
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Q_D(QListView);
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d->modeProperties |= uint(QListViewPrivate::Flow);
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d->flow = flow;
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d->doDelayedItemsLayout();
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}
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QListView::Flow QListView::flow() const
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{
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Q_D(const QListView);
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return d->flow;
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}
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/*!
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\property QListView::isWrapping
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\brief whether the items layout should wrap.
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This property holds whether the layout should wrap when there is
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no more space in the visible area. The point at which the layout wraps
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depends on the \l flow property.
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Setting this property when the view is visible will cause the
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items to be laid out again.
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By default, this property is \c false.
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\sa viewMode
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*/
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void QListView::setWrapping(bool enable)
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{
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Q_D(QListView);
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d->modeProperties |= uint(QListViewPrivate::Wrap);
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d->setWrapping(enable);
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d->doDelayedItemsLayout();
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}
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bool QListView::isWrapping() const
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{
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Q_D(const QListView);
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return d->isWrapping();
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}
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/*!
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\property QListView::resizeMode
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\brief whether the items are laid out again when the view is resized.
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If this property is \l Adjust, the items will be laid out again
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when the view is resized. If the value is \l Fixed, the items will
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not be laid out when the view is resized.
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By default, this property is set to \l Fixed.
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\sa movement, gridSize, viewMode
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*/
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void QListView::setResizeMode(ResizeMode mode)
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{
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Q_D(QListView);
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d->modeProperties |= uint(QListViewPrivate::ResizeMode);
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d->resizeMode = mode;
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}
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QListView::ResizeMode QListView::resizeMode() const
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{
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Q_D(const QListView);
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return d->resizeMode;
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}
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/*!
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\property QListView::layoutMode
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\brief determines whether the layout of items should happen immediately or be delayed.
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This property holds the layout mode for the items. When the mode
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is \l SinglePass (the default), the items are laid out all in one go.
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When the mode is \l Batched, the items are laid out in batches of \l batchSize
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items, while processing events. This makes it possible to
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instantly view and interact with the visible items while the rest
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are being laid out.
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\sa viewMode
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*/
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void QListView::setLayoutMode(LayoutMode mode)
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{
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Q_D(QListView);
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d->layoutMode = mode;
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}
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QListView::LayoutMode QListView::layoutMode() const
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{
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Q_D(const QListView);
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return d->layoutMode;
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}
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/*!
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\property QListView::spacing
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\brief the space around the items in the layout
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This property is the size of the empty space that is padded around
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an item in the layout.
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Setting this property when the view is visible will cause the
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items to be laid out again.
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By default, this property contains a value of 0.
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\sa viewMode
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*/
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void QListView::setSpacing(int space)
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{
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Q_D(QListView);
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d->modeProperties |= uint(QListViewPrivate::Spacing);
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d->setSpacing(space);
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d->doDelayedItemsLayout();
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}
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int QListView::spacing() const
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{
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Q_D(const QListView);
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return d->spacing();
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}
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/*!
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\property QListView::batchSize
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\brief the number of items laid out in each batch if \l layoutMode is
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set to \l Batched
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The default value is 100.
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\since 4.2
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*/
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void QListView::setBatchSize(int batchSize)
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{
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Q_D(QListView);
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if (batchSize <= 0) {
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qWarning("Invalid batchSize (%d)", batchSize);
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return;
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}
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d->batchSize = batchSize;
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}
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int QListView::batchSize() const
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{
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Q_D(const QListView);
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return d->batchSize;
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}
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/*!
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\property QListView::gridSize
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\brief the size of the layout grid
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This property is the size of the grid in which the items are laid
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out. The default is an empty size which means that there is no
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grid and the layout is not done in a grid. Setting this property
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to a non-empty size switches on the grid layout. (When a grid
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layout is in force the \l spacing property is ignored.)
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Setting this property when the view is visible will cause the
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items to be laid out again.
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\sa viewMode
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*/
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void QListView::setGridSize(const QSize &size)
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{
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Q_D(QListView);
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d->modeProperties |= uint(QListViewPrivate::GridSize);
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d->setGridSize(size);
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d->doDelayedItemsLayout();
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}
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QSize QListView::gridSize() const
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{
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Q_D(const QListView);
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return d->gridSize();
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}
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/*!
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\property QListView::viewMode
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\brief the view mode of the QListView.
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This property will change the other unset properties to conform
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with the set view mode. QListView-specific properties that have already been set
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will not be changed, unless clearPropertyFlags() has been called.
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Setting the view mode will enable or disable drag and drop based on the
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selected movement. For ListMode, the default movement is \l Static
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(drag and drop disabled); for IconMode, the default movement is
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\l Free (drag and drop enabled).
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\sa isWrapping, spacing, gridSize, flow, movement, resizeMode
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*/
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void QListView::setViewMode(ViewMode mode)
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{
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Q_D(QListView);
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if (d->commonListView && d->viewMode == mode)
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return;
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d->viewMode = mode;
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delete d->commonListView;
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if (mode == ListMode) {
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d->commonListView = new QListModeViewBase(this, d);
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if (!(d->modeProperties & QListViewPrivate::Wrap))
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d->setWrapping(false);
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if (!(d->modeProperties & QListViewPrivate::Spacing))
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d->setSpacing(0);
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if (!(d->modeProperties & QListViewPrivate::GridSize))
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d->setGridSize(QSize());
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if (!(d->modeProperties & QListViewPrivate::Flow))
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d->flow = TopToBottom;
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if (!(d->modeProperties & QListViewPrivate::Movement))
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d->movement = Static;
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if (!(d->modeProperties & QListViewPrivate::ResizeMode))
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d->resizeMode = Fixed;
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if (!(d->modeProperties & QListViewPrivate::SelectionRectVisible))
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d->showElasticBand = false;
|
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} else {
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d->commonListView = new QIconModeViewBase(this, d);
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if (!(d->modeProperties & QListViewPrivate::Wrap))
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d->setWrapping(true);
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if (!(d->modeProperties & QListViewPrivate::Spacing))
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d->setSpacing(0);
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if (!(d->modeProperties & QListViewPrivate::GridSize))
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d->setGridSize(QSize());
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if (!(d->modeProperties & QListViewPrivate::Flow))
|
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d->flow = LeftToRight;
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if (!(d->modeProperties & QListViewPrivate::Movement))
|
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d->movement = Free;
|
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if (!(d->modeProperties & QListViewPrivate::ResizeMode))
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d->resizeMode = Fixed;
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if (!(d->modeProperties & QListViewPrivate::SelectionRectVisible))
|
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d->showElasticBand = true;
|
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}
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#ifndef QT_NO_DRAGANDDROP
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bool movable = (d->movement != Static);
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setDragEnabled(movable);
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setAcceptDrops(movable);
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#endif
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d->clear();
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d->doDelayedItemsLayout();
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}
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QListView::ViewMode QListView::viewMode() const
|
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{
|
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Q_D(const QListView);
|
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return d->viewMode;
|
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}
|
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|
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/*!
|
|
Clears the QListView-specific property flags. See \l{viewMode}.
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|
|
Properties inherited from QAbstractItemView are not covered by the
|
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property flags. Specifically, \l{QAbstractItemView::dragEnabled}
|
|
{dragEnabled} and \l{QAbstractItemView::acceptDrops}
|
|
{acceptsDrops} are computed by QListView when calling
|
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setMovement() or setViewMode().
|
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*/
|
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void QListView::clearPropertyFlags()
|
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{
|
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Q_D(QListView);
|
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d->modeProperties = 0;
|
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}
|
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|
|
/*!
|
|
Returns \c true if the \a row is hidden; otherwise returns \c false.
|
|
*/
|
|
bool QListView::isRowHidden(int row) const
|
|
{
|
|
Q_D(const QListView);
|
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return d->isHidden(row);
|
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}
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|
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/*!
|
|
If \a hide is true, the given \a row will be hidden; otherwise
|
|
the \a row will be shown.
|
|
*/
|
|
void QListView::setRowHidden(int row, bool hide)
|
|
{
|
|
Q_D(QListView);
|
|
const bool hidden = d->isHidden(row);
|
|
if (hide && !hidden)
|
|
d->commonListView->appendHiddenRow(row);
|
|
else if (!hide && hidden)
|
|
d->commonListView->removeHiddenRow(row);
|
|
d->doDelayedItemsLayout();
|
|
d->viewport->update();
|
|
}
|
|
|
|
/*!
|
|
\reimp
|
|
*/
|
|
QRect QListView::visualRect(const QModelIndex &index) const
|
|
{
|
|
Q_D(const QListView);
|
|
return d->mapToViewport(rectForIndex(index));
|
|
}
|
|
|
|
/*!
|
|
\reimp
|
|
*/
|
|
void QListView::scrollTo(const QModelIndex &index, ScrollHint hint)
|
|
{
|
|
Q_D(QListView);
|
|
|
|
if (index.parent() != d->root || index.column() != d->column)
|
|
return;
|
|
|
|
const QRect rect = visualRect(index);
|
|
if (hint == EnsureVisible && d->viewport->rect().contains(rect)) {
|
|
d->viewport->update(rect);
|
|
return;
|
|
}
|
|
|
|
if (d->flow == QListView::TopToBottom || d->isWrapping()) // vertical
|
|
verticalScrollBar()->setValue(d->verticalScrollToValue(index, rect, hint));
|
|
|
|
if (d->flow == QListView::LeftToRight || d->isWrapping()) // horizontal
|
|
horizontalScrollBar()->setValue(d->horizontalScrollToValue(index, rect, hint));
|
|
}
|
|
|
|
int QListViewPrivate::horizontalScrollToValue(const QModelIndex &index, const QRect &rect,
|
|
QListView::ScrollHint hint) const
|
|
{
|
|
Q_Q(const QListView);
|
|
const QRect area = viewport->rect();
|
|
const bool leftOf = q->isRightToLeft()
|
|
? (rect.left() < area.left()) && (rect.right() < area.right())
|
|
: rect.left() < area.left();
|
|
const bool rightOf = q->isRightToLeft()
|
|
? rect.right() > area.right()
|
|
: (rect.right() > area.right()) && (rect.left() > area.left());
|
|
return commonListView->horizontalScrollToValue(q->visualIndex(index), hint, leftOf, rightOf, area, rect);
|
|
}
|
|
|
|
int QListViewPrivate::verticalScrollToValue(const QModelIndex &index, const QRect &rect,
|
|
QListView::ScrollHint hint) const
|
|
{
|
|
Q_Q(const QListView);
|
|
const QRect area = viewport->rect();
|
|
const bool above = (hint == QListView::EnsureVisible && rect.top() < area.top());
|
|
const bool below = (hint == QListView::EnsureVisible && rect.bottom() > area.bottom());
|
|
return commonListView->verticalScrollToValue(q->visualIndex(index), hint, above, below, area, rect);
|
|
}
|
|
|
|
void QListViewPrivate::selectAll(QItemSelectionModel::SelectionFlags command)
|
|
{
|
|
if (!selectionModel)
|
|
return;
|
|
|
|
QItemSelection selection;
|
|
QModelIndex topLeft;
|
|
int row = 0;
|
|
const int colCount = model->columnCount(root);
|
|
for(; row < model->rowCount(root); ++row) {
|
|
if (isHidden(row)) {
|
|
//it might be the end of a selection range
|
|
if (topLeft.isValid()) {
|
|
QModelIndex bottomRight = model->index(row - 1, colCount - 1, root);
|
|
selection.append(QItemSelectionRange(topLeft, bottomRight));
|
|
topLeft = QModelIndex();
|
|
}
|
|
continue;
|
|
}
|
|
|
|
if (!topLeft.isValid()) //start of a new selection range
|
|
topLeft = model->index(row, 0, root);
|
|
}
|
|
|
|
if (topLeft.isValid()) {
|
|
//last selected range
|
|
QModelIndex bottomRight = model->index(row - 1, colCount - 1, root);
|
|
selection.append(QItemSelectionRange(topLeft, bottomRight));
|
|
}
|
|
|
|
if (!selection.isEmpty())
|
|
selectionModel->select(selection, command);
|
|
}
|
|
|
|
/*!
|
|
\reimp
|
|
|
|
We have a QListView way of knowing what elements are on the viewport
|
|
through the intersectingSet function
|
|
*/
|
|
QItemViewPaintPairs QListViewPrivate::draggablePaintPairs(const QModelIndexList &indexes, QRect *r) const
|
|
{
|
|
Q_ASSERT(r);
|
|
Q_Q(const QListView);
|
|
QRect &rect = *r;
|
|
const QRect viewportRect = viewport->rect();
|
|
QItemViewPaintPairs ret;
|
|
const QSet<QModelIndex> visibleIndexes = intersectingSet(viewportRect.translated(q->horizontalOffset(), q->verticalOffset())).toList().toSet();
|
|
for (int i = 0; i < indexes.count(); ++i) {
|
|
const QModelIndex &index = indexes.at(i);
|
|
if (visibleIndexes.contains(index)) {
|
|
const QRect current = q->visualRect(index);
|
|
ret += qMakePair(current, index);
|
|
rect |= current;
|
|
}
|
|
}
|
|
rect &= viewportRect;
|
|
return ret;
|
|
}
|
|
|
|
/*!
|
|
\internal
|
|
*/
|
|
void QListView::reset()
|
|
{
|
|
Q_D(QListView);
|
|
d->clear();
|
|
d->hiddenRows.clear();
|
|
QAbstractItemView::reset();
|
|
}
|
|
|
|
/*!
|
|
\internal
|
|
*/
|
|
void QListView::setRootIndex(const QModelIndex &index)
|
|
{
|
|
Q_D(QListView);
|
|
d->column = qBound(0, d->column, d->model->columnCount(index) - 1);
|
|
QAbstractItemView::setRootIndex(index);
|
|
// sometimes we get an update before reset() is called
|
|
d->clear();
|
|
d->hiddenRows.clear();
|
|
}
|
|
|
|
/*!
|
|
\internal
|
|
|
|
Scroll the view contents by \a dx and \a dy.
|
|
*/
|
|
|
|
void QListView::scrollContentsBy(int dx, int dy)
|
|
{
|
|
Q_D(QListView);
|
|
d->delayedAutoScroll.stop(); // auto scroll was canceled by the user scrolling
|
|
d->commonListView->scrollContentsBy(dx, dy, d->state == QListView::DragSelectingState);
|
|
}
|
|
|
|
/*!
|
|
\internal
|
|
|
|
Resize the internal contents to \a width and \a height and set the
|
|
scroll bar ranges accordingly.
|
|
*/
|
|
void QListView::resizeContents(int width, int height)
|
|
{
|
|
Q_D(QListView);
|
|
d->setContentsSize(width, height);
|
|
}
|
|
|
|
/*!
|
|
\internal
|
|
*/
|
|
QSize QListView::contentsSize() const
|
|
{
|
|
Q_D(const QListView);
|
|
return d->contentsSize();
|
|
}
|
|
|
|
/*!
|
|
\reimp
|
|
*/
|
|
void QListView::dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight, const QVector<int> &roles)
|
|
{
|
|
d_func()->commonListView->dataChanged(topLeft, bottomRight);
|
|
QAbstractItemView::dataChanged(topLeft, bottomRight, roles);
|
|
}
|
|
|
|
/*!
|
|
\reimp
|
|
*/
|
|
void QListView::rowsInserted(const QModelIndex &parent, int start, int end)
|
|
{
|
|
Q_D(QListView);
|
|
// ### be smarter about inserted items
|
|
d->clear();
|
|
d->doDelayedItemsLayout();
|
|
QAbstractItemView::rowsInserted(parent, start, end);
|
|
}
|
|
|
|
/*!
|
|
\reimp
|
|
*/
|
|
void QListView::rowsAboutToBeRemoved(const QModelIndex &parent, int start, int end)
|
|
{
|
|
Q_D(QListView);
|
|
// if the parent is above d->root in the tree, nothing will happen
|
|
QAbstractItemView::rowsAboutToBeRemoved(parent, start, end);
|
|
if (parent == d->root) {
|
|
QSet<QPersistentModelIndex>::iterator it = d->hiddenRows.begin();
|
|
while (it != d->hiddenRows.end()) {
|
|
int hiddenRow = it->row();
|
|
if (hiddenRow >= start && hiddenRow <= end) {
|
|
it = d->hiddenRows.erase(it);
|
|
} else {
|
|
++it;
|
|
}
|
|
}
|
|
}
|
|
d->clear();
|
|
d->doDelayedItemsLayout();
|
|
}
|
|
|
|
/*!
|
|
\reimp
|
|
*/
|
|
void QListView::mouseMoveEvent(QMouseEvent *e)
|
|
{
|
|
if (!isVisible())
|
|
return;
|
|
Q_D(QListView);
|
|
QAbstractItemView::mouseMoveEvent(e);
|
|
if (state() == DragSelectingState
|
|
&& d->showElasticBand
|
|
&& d->selectionMode != SingleSelection
|
|
&& d->selectionMode != NoSelection) {
|
|
QRect rect(d->pressedPosition, e->pos() + QPoint(horizontalOffset(), verticalOffset()));
|
|
rect = rect.normalized();
|
|
d->viewport->update(d->mapToViewport(rect.united(d->elasticBand)));
|
|
d->elasticBand = rect;
|
|
}
|
|
}
|
|
|
|
/*!
|
|
\reimp
|
|
*/
|
|
void QListView::mouseReleaseEvent(QMouseEvent *e)
|
|
{
|
|
Q_D(QListView);
|
|
QAbstractItemView::mouseReleaseEvent(e);
|
|
// #### move this implementation into a dynamic class
|
|
if (d->showElasticBand && d->elasticBand.isValid()) {
|
|
d->viewport->update(d->mapToViewport(d->elasticBand));
|
|
d->elasticBand = QRect();
|
|
}
|
|
}
|
|
|
|
/*!
|
|
\reimp
|
|
*/
|
|
void QListView::timerEvent(QTimerEvent *e)
|
|
{
|
|
Q_D(QListView);
|
|
if (e->timerId() == d->batchLayoutTimer.timerId()) {
|
|
if (d->doItemsLayout(d->batchSize)) { // layout is done
|
|
d->batchLayoutTimer.stop();
|
|
updateGeometries();
|
|
d->viewport->update();
|
|
}
|
|
}
|
|
QAbstractItemView::timerEvent(e);
|
|
}
|
|
|
|
/*!
|
|
\reimp
|
|
*/
|
|
void QListView::resizeEvent(QResizeEvent *e)
|
|
{
|
|
Q_D(QListView);
|
|
if (d->delayedPendingLayout)
|
|
return;
|
|
|
|
QSize delta = e->size() - e->oldSize();
|
|
|
|
if (delta.isNull())
|
|
return;
|
|
|
|
bool listWrap = (d->viewMode == ListMode) && d->wrapItemText;
|
|
bool flowDimensionChanged = (d->flow == LeftToRight && delta.width() != 0)
|
|
|| (d->flow == TopToBottom && delta.height() != 0);
|
|
|
|
// We post a delayed relayout in the following cases :
|
|
// - we're wrapping
|
|
// - the state is NoState, we're adjusting and the size has changed in the flowing direction
|
|
if (listWrap
|
|
|| (state() == NoState && d->resizeMode == Adjust && flowDimensionChanged)) {
|
|
d->doDelayedItemsLayout(100); // wait 1/10 sec before starting the layout
|
|
} else {
|
|
QAbstractItemView::resizeEvent(e);
|
|
}
|
|
}
|
|
|
|
#ifndef QT_NO_DRAGANDDROP
|
|
|
|
/*!
|
|
\reimp
|
|
*/
|
|
void QListView::dragMoveEvent(QDragMoveEvent *e)
|
|
{
|
|
Q_D(QListView);
|
|
if (!d->commonListView->filterDragMoveEvent(e)) {
|
|
if (viewMode() == QListView::ListMode && flow() == QListView::LeftToRight)
|
|
static_cast<QListModeViewBase *>(d->commonListView)->dragMoveEvent(e);
|
|
else
|
|
QAbstractItemView::dragMoveEvent(e);
|
|
}
|
|
}
|
|
|
|
|
|
/*!
|
|
\reimp
|
|
*/
|
|
void QListView::dragLeaveEvent(QDragLeaveEvent *e)
|
|
{
|
|
if (!d_func()->commonListView->filterDragLeaveEvent(e))
|
|
QAbstractItemView::dragLeaveEvent(e);
|
|
}
|
|
|
|
/*!
|
|
\reimp
|
|
*/
|
|
void QListView::dropEvent(QDropEvent *e)
|
|
{
|
|
if (!d_func()->commonListView->filterDropEvent(e))
|
|
QAbstractItemView::dropEvent(e);
|
|
}
|
|
|
|
/*!
|
|
\reimp
|
|
*/
|
|
void QListView::startDrag(Qt::DropActions supportedActions)
|
|
{
|
|
if (!d_func()->commonListView->filterStartDrag(supportedActions))
|
|
QAbstractItemView::startDrag(supportedActions);
|
|
}
|
|
|
|
#endif // QT_NO_DRAGANDDROP
|
|
|
|
/*!
|
|
\reimp
|
|
*/
|
|
QStyleOptionViewItem QListView::viewOptions() const
|
|
{
|
|
Q_D(const QListView);
|
|
QStyleOptionViewItem option = QAbstractItemView::viewOptions();
|
|
if (!d->iconSize.isValid()) { // otherwise it was already set in abstractitemview
|
|
int pm = (d->viewMode == QListView::ListMode
|
|
? style()->pixelMetric(QStyle::PM_ListViewIconSize, 0, this)
|
|
: style()->pixelMetric(QStyle::PM_IconViewIconSize, 0, this));
|
|
option.decorationSize = QSize(pm, pm);
|
|
}
|
|
if (d->viewMode == QListView::IconMode) {
|
|
option.showDecorationSelected = false;
|
|
option.decorationPosition = QStyleOptionViewItem::Top;
|
|
option.displayAlignment = Qt::AlignCenter;
|
|
} else {
|
|
option.decorationPosition = QStyleOptionViewItem::Left;
|
|
}
|
|
return option;
|
|
}
|
|
|
|
|
|
/*!
|
|
\reimp
|
|
*/
|
|
void QListView::paintEvent(QPaintEvent *e)
|
|
{
|
|
Q_D(QListView);
|
|
if (!d->itemDelegate)
|
|
return;
|
|
QStyleOptionViewItem option = d->viewOptionsV1();
|
|
QPainter painter(d->viewport);
|
|
|
|
const QVector<QModelIndex> toBeRendered = d->intersectingSet(e->rect().translated(horizontalOffset(), verticalOffset()), false);
|
|
|
|
const QModelIndex current = currentIndex();
|
|
const QModelIndex hover = d->hover;
|
|
const QAbstractItemModel *itemModel = d->model;
|
|
const QItemSelectionModel *selections = d->selectionModel;
|
|
const bool focus = (hasFocus() || d->viewport->hasFocus()) && current.isValid();
|
|
const bool alternate = d->alternatingColors;
|
|
const QStyle::State state = option.state;
|
|
const QAbstractItemView::State viewState = this->state();
|
|
const bool enabled = (state & QStyle::State_Enabled) != 0;
|
|
|
|
bool alternateBase = false;
|
|
int previousRow = -2; // trigger the alternateBase adjustment on first pass
|
|
|
|
int maxSize = (flow() == TopToBottom)
|
|
? qMax(viewport()->size().width(), d->contentsSize().width()) - 2 * d->spacing()
|
|
: qMax(viewport()->size().height(), d->contentsSize().height()) - 2 * d->spacing();
|
|
|
|
QVector<QModelIndex>::const_iterator end = toBeRendered.constEnd();
|
|
for (QVector<QModelIndex>::const_iterator it = toBeRendered.constBegin(); it != end; ++it) {
|
|
Q_ASSERT((*it).isValid());
|
|
option.rect = visualRect(*it);
|
|
|
|
if (flow() == TopToBottom)
|
|
option.rect.setWidth(qMin(maxSize, option.rect.width()));
|
|
else
|
|
option.rect.setHeight(qMin(maxSize, option.rect.height()));
|
|
|
|
option.state = state;
|
|
if (selections && selections->isSelected(*it))
|
|
option.state |= QStyle::State_Selected;
|
|
if (enabled) {
|
|
QPalette::ColorGroup cg;
|
|
if ((itemModel->flags(*it) & Qt::ItemIsEnabled) == 0) {
|
|
option.state &= ~QStyle::State_Enabled;
|
|
cg = QPalette::Disabled;
|
|
} else {
|
|
cg = QPalette::Normal;
|
|
}
|
|
option.palette.setCurrentColorGroup(cg);
|
|
}
|
|
if (focus && current == *it) {
|
|
option.state |= QStyle::State_HasFocus;
|
|
if (viewState == EditingState)
|
|
option.state |= QStyle::State_Editing;
|
|
}
|
|
if (*it == hover)
|
|
option.state |= QStyle::State_MouseOver;
|
|
else
|
|
option.state &= ~QStyle::State_MouseOver;
|
|
|
|
if (alternate) {
|
|
int row = (*it).row();
|
|
if (row != previousRow + 1) {
|
|
// adjust alternateBase according to rows in the "gap"
|
|
if (!d->hiddenRows.isEmpty()) {
|
|
for (int r = qMax(previousRow + 1, 0); r < row; ++r) {
|
|
if (!d->isHidden(r))
|
|
alternateBase = !alternateBase;
|
|
}
|
|
} else {
|
|
alternateBase = (row & 1) != 0;
|
|
}
|
|
}
|
|
if (alternateBase) {
|
|
option.features |= QStyleOptionViewItem::Alternate;
|
|
} else {
|
|
option.features &= ~QStyleOptionViewItem::Alternate;
|
|
}
|
|
|
|
// draw background of the item (only alternate row). rest of the background
|
|
// is provided by the delegate
|
|
QStyle::State oldState = option.state;
|
|
option.state &= ~QStyle::State_Selected;
|
|
style()->drawPrimitive(QStyle::PE_PanelItemViewRow, &option, &painter, this);
|
|
option.state = oldState;
|
|
|
|
alternateBase = !alternateBase;
|
|
previousRow = row;
|
|
}
|
|
|
|
d->delegateForIndex(*it)->paint(&painter, option, *it);
|
|
}
|
|
|
|
#ifndef QT_NO_DRAGANDDROP
|
|
d->commonListView->paintDragDrop(&painter);
|
|
#endif
|
|
|
|
#ifndef QT_NO_RUBBERBAND
|
|
// #### move this implementation into a dynamic class
|
|
if (d->showElasticBand && d->elasticBand.isValid()) {
|
|
QStyleOptionRubberBand opt;
|
|
opt.initFrom(this);
|
|
opt.shape = QRubberBand::Rectangle;
|
|
opt.opaque = false;
|
|
opt.rect = d->mapToViewport(d->elasticBand, false).intersected(
|
|
d->viewport->rect().adjusted(-16, -16, 16, 16));
|
|
painter.save();
|
|
style()->drawControl(QStyle::CE_RubberBand, &opt, &painter);
|
|
painter.restore();
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/*!
|
|
\reimp
|
|
*/
|
|
QModelIndex QListView::indexAt(const QPoint &p) const
|
|
{
|
|
Q_D(const QListView);
|
|
QRect rect(p.x() + horizontalOffset(), p.y() + verticalOffset(), 1, 1);
|
|
const QVector<QModelIndex> intersectVector = d->intersectingSet(rect);
|
|
QModelIndex index = intersectVector.count() > 0
|
|
? intersectVector.last() : QModelIndex();
|
|
if (index.isValid() && visualRect(index).contains(p))
|
|
return index;
|
|
return QModelIndex();
|
|
}
|
|
|
|
/*!
|
|
\reimp
|
|
*/
|
|
int QListView::horizontalOffset() const
|
|
{
|
|
return d_func()->commonListView->horizontalOffset();
|
|
}
|
|
|
|
/*!
|
|
\reimp
|
|
*/
|
|
int QListView::verticalOffset() const
|
|
{
|
|
return d_func()->commonListView->verticalOffset();
|
|
}
|
|
|
|
/*!
|
|
\reimp
|
|
*/
|
|
QModelIndex QListView::moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers)
|
|
{
|
|
Q_D(QListView);
|
|
Q_UNUSED(modifiers);
|
|
|
|
QModelIndex current = currentIndex();
|
|
if (!current.isValid()) {
|
|
int rowCount = d->model->rowCount(d->root);
|
|
if (!rowCount)
|
|
return QModelIndex();
|
|
int row = 0;
|
|
while (row < rowCount && d->isHiddenOrDisabled(row))
|
|
++row;
|
|
if (row >= rowCount)
|
|
return QModelIndex();
|
|
return d->model->index(row, d->column, d->root);
|
|
}
|
|
|
|
const QRect initialRect = rectForIndex(current);
|
|
QRect rect = initialRect;
|
|
if (rect.isEmpty()) {
|
|
return d->model->index(0, d->column, d->root);
|
|
}
|
|
if (d->gridSize().isValid()) rect.setSize(d->gridSize());
|
|
|
|
QSize contents = d->contentsSize();
|
|
QVector<QModelIndex> intersectVector;
|
|
|
|
switch (cursorAction) {
|
|
case MoveLeft:
|
|
while (intersectVector.isEmpty()) {
|
|
rect.translate(-rect.width(), 0);
|
|
if (rect.right() <= 0)
|
|
return current;
|
|
if (rect.left() < 0)
|
|
rect.setLeft(0);
|
|
intersectVector = d->intersectingSet(rect);
|
|
d->removeCurrentAndDisabled(&intersectVector, current);
|
|
}
|
|
return d->closestIndex(initialRect, intersectVector);
|
|
case MoveRight:
|
|
while (intersectVector.isEmpty()) {
|
|
rect.translate(rect.width(), 0);
|
|
if (rect.left() >= contents.width())
|
|
return current;
|
|
if (rect.right() > contents.width())
|
|
rect.setRight(contents.width());
|
|
intersectVector = d->intersectingSet(rect);
|
|
d->removeCurrentAndDisabled(&intersectVector, current);
|
|
}
|
|
return d->closestIndex(initialRect, intersectVector);
|
|
case MovePageUp:
|
|
// move current by (visibileRowCount - 1) items.
|
|
// rect.translate(0, -rect.height()); will happen in the switch fallthrough for MoveUp.
|
|
rect.moveTop(rect.top() - d->viewport->height() + 2 * rect.height());
|
|
if (rect.top() < rect.height())
|
|
rect.moveTop(rect.height());
|
|
case MovePrevious:
|
|
case MoveUp:
|
|
while (intersectVector.isEmpty()) {
|
|
rect.translate(0, -rect.height());
|
|
if (rect.bottom() <= 0) {
|
|
#ifdef QT_KEYPAD_NAVIGATION
|
|
if (QApplication::keypadNavigationEnabled()) {
|
|
int row = d->batchStartRow() - 1;
|
|
while (row >= 0 && d->isHiddenOrDisabled(row))
|
|
--row;
|
|
if (row >= 0)
|
|
return d->model->index(row, d->column, d->root);
|
|
}
|
|
#endif
|
|
return current;
|
|
}
|
|
if (rect.top() < 0)
|
|
rect.setTop(0);
|
|
intersectVector = d->intersectingSet(rect);
|
|
d->removeCurrentAndDisabled(&intersectVector, current);
|
|
}
|
|
return d->closestIndex(initialRect, intersectVector);
|
|
case MovePageDown:
|
|
// move current by (visibileRowCount - 1) items.
|
|
// rect.translate(0, rect.height()); will happen in the switch fallthrough for MoveDown.
|
|
rect.moveTop(rect.top() + d->viewport->height() - 2 * rect.height());
|
|
if (rect.bottom() > contents.height() - rect.height())
|
|
rect.moveBottom(contents.height() - rect.height());
|
|
case MoveNext:
|
|
case MoveDown:
|
|
while (intersectVector.isEmpty()) {
|
|
rect.translate(0, rect.height());
|
|
if (rect.top() >= contents.height()) {
|
|
#ifdef QT_KEYPAD_NAVIGATION
|
|
if (QApplication::keypadNavigationEnabled()) {
|
|
int rowCount = d->model->rowCount(d->root);
|
|
int row = 0;
|
|
while (row < rowCount && d->isHiddenOrDisabled(row))
|
|
++row;
|
|
if (row < rowCount)
|
|
return d->model->index(row, d->column, d->root);
|
|
}
|
|
#endif
|
|
return current;
|
|
}
|
|
if (rect.bottom() > contents.height())
|
|
rect.setBottom(contents.height());
|
|
intersectVector = d->intersectingSet(rect);
|
|
d->removeCurrentAndDisabled(&intersectVector, current);
|
|
}
|
|
return d->closestIndex(initialRect, intersectVector);
|
|
case MoveHome:
|
|
return d->model->index(0, d->column, d->root);
|
|
case MoveEnd:
|
|
return d->model->index(d->batchStartRow() - 1, d->column, d->root);}
|
|
|
|
return current;
|
|
}
|
|
|
|
/*!
|
|
Returns the rectangle of the item at position \a index in the
|
|
model. The rectangle is in contents coordinates.
|
|
|
|
\sa visualRect()
|
|
*/
|
|
QRect QListView::rectForIndex(const QModelIndex &index) const
|
|
{
|
|
return d_func()->rectForIndex(index);
|
|
}
|
|
|
|
/*!
|
|
\since 4.1
|
|
|
|
Sets the contents position of the item at \a index in the model to the given
|
|
\a position.
|
|
If the list view's movement mode is Static or its view mode is ListView,
|
|
this function will have no effect.
|
|
*/
|
|
void QListView::setPositionForIndex(const QPoint &position, const QModelIndex &index)
|
|
{
|
|
Q_D(QListView);
|
|
if (d->movement == Static
|
|
|| !d->isIndexValid(index)
|
|
|| index.parent() != d->root
|
|
|| index.column() != d->column)
|
|
return;
|
|
|
|
d->executePostedLayout();
|
|
d->commonListView->setPositionForIndex(position, index);
|
|
}
|
|
|
|
/*!
|
|
\reimp
|
|
*/
|
|
void QListView::setSelection(const QRect &rect, QItemSelectionModel::SelectionFlags command)
|
|
{
|
|
Q_D(QListView);
|
|
if (!d->selectionModel)
|
|
return;
|
|
|
|
// if we are wrapping, we can only selecte inside the contents rectangle
|
|
int w = qMax(d->contentsSize().width(), d->viewport->width());
|
|
int h = qMax(d->contentsSize().height(), d->viewport->height());
|
|
if (d->wrap && !QRect(0, 0, w, h).intersects(rect))
|
|
return;
|
|
|
|
QItemSelection selection;
|
|
|
|
if (rect.width() == 1 && rect.height() == 1) {
|
|
const QVector<QModelIndex> intersectVector = d->intersectingSet(rect.translated(horizontalOffset(), verticalOffset()));
|
|
QModelIndex tl;
|
|
if (!intersectVector.isEmpty())
|
|
tl = intersectVector.last(); // special case for mouse press; only select the top item
|
|
if (tl.isValid() && d->isIndexEnabled(tl))
|
|
selection.select(tl, tl);
|
|
} else {
|
|
if (state() == DragSelectingState) { // visual selection mode (rubberband selection)
|
|
selection = d->selection(rect.translated(horizontalOffset(), verticalOffset()));
|
|
} else { // logical selection mode (key and mouse click selection)
|
|
QModelIndex tl, br;
|
|
// get the first item
|
|
const QRect topLeft(rect.left() + horizontalOffset(), rect.top() + verticalOffset(), 1, 1);
|
|
QVector<QModelIndex> intersectVector = d->intersectingSet(topLeft);
|
|
if (!intersectVector.isEmpty())
|
|
tl = intersectVector.last();
|
|
// get the last item
|
|
const QRect bottomRight(rect.right() + horizontalOffset(), rect.bottom() + verticalOffset(), 1, 1);
|
|
intersectVector = d->intersectingSet(bottomRight);
|
|
if (!intersectVector.isEmpty())
|
|
br = intersectVector.last();
|
|
|
|
// get the ranges
|
|
if (tl.isValid() && br.isValid()
|
|
&& d->isIndexEnabled(tl)
|
|
&& d->isIndexEnabled(br)) {
|
|
QRect first = rectForIndex(tl);
|
|
QRect last = rectForIndex(br);
|
|
QRect middle;
|
|
if (d->flow == LeftToRight) {
|
|
QRect &top = first;
|
|
QRect &bottom = last;
|
|
// if bottom is above top, swap them
|
|
if (top.center().y() > bottom.center().y()) {
|
|
QRect tmp = top;
|
|
top = bottom;
|
|
bottom = tmp;
|
|
}
|
|
// if the rect are on differnet lines, expand
|
|
if (top.top() != bottom.top()) {
|
|
// top rectangle
|
|
if (isRightToLeft())
|
|
top.setLeft(0);
|
|
else
|
|
top.setRight(contentsSize().width());
|
|
// bottom rectangle
|
|
if (isRightToLeft())
|
|
bottom.setRight(contentsSize().width());
|
|
else
|
|
bottom.setLeft(0);
|
|
} else if (top.left() > bottom.right()) {
|
|
if (isRightToLeft())
|
|
bottom.setLeft(top.right());
|
|
else
|
|
bottom.setRight(top.left());
|
|
} else {
|
|
if (isRightToLeft())
|
|
top.setLeft(bottom.right());
|
|
else
|
|
top.setRight(bottom.left());
|
|
}
|
|
// middle rectangle
|
|
if (top.bottom() < bottom.top()) {
|
|
if (gridSize().isValid() && !gridSize().isNull())
|
|
middle.setTop(top.top() + gridSize().height());
|
|
else
|
|
middle.setTop(top.bottom() + 1);
|
|
middle.setLeft(qMin(top.left(), bottom.left()));
|
|
middle.setBottom(bottom.top() - 1);
|
|
middle.setRight(qMax(top.right(), bottom.right()));
|
|
}
|
|
} else { // TopToBottom
|
|
QRect &left = first;
|
|
QRect &right = last;
|
|
if (left.center().x() > right.center().x())
|
|
qSwap(left, right);
|
|
|
|
int ch = contentsSize().height();
|
|
if (left.left() != right.left()) {
|
|
// left rectangle
|
|
if (isRightToLeft())
|
|
left.setTop(0);
|
|
else
|
|
left.setBottom(ch);
|
|
|
|
// top rectangle
|
|
if (isRightToLeft())
|
|
right.setBottom(ch);
|
|
else
|
|
right.setTop(0);
|
|
// only set middle if the
|
|
middle.setTop(0);
|
|
middle.setBottom(ch);
|
|
if (gridSize().isValid() && !gridSize().isNull())
|
|
middle.setLeft(left.left() + gridSize().width());
|
|
else
|
|
middle.setLeft(left.right() + 1);
|
|
middle.setRight(right.left() - 1);
|
|
} else if (left.bottom() < right.top()) {
|
|
left.setBottom(right.top() - 1);
|
|
} else {
|
|
right.setBottom(left.top() - 1);
|
|
}
|
|
}
|
|
|
|
// do the selections
|
|
QItemSelection topSelection = d->selection(first);
|
|
QItemSelection middleSelection = d->selection(middle);
|
|
QItemSelection bottomSelection = d->selection(last);
|
|
// merge
|
|
selection.merge(topSelection, QItemSelectionModel::Select);
|
|
selection.merge(middleSelection, QItemSelectionModel::Select);
|
|
selection.merge(bottomSelection, QItemSelectionModel::Select);
|
|
}
|
|
}
|
|
}
|
|
|
|
d->selectionModel->select(selection, command);
|
|
}
|
|
|
|
/*!
|
|
\reimp
|
|
|
|
Since 4.7, the returned region only contains rectangles intersecting
|
|
(or included in) the viewport.
|
|
*/
|
|
QRegion QListView::visualRegionForSelection(const QItemSelection &selection) const
|
|
{
|
|
Q_D(const QListView);
|
|
// ### NOTE: this is a potential bottleneck in non-static mode
|
|
int c = d->column;
|
|
QRegion selectionRegion;
|
|
const QRect &viewportRect = d->viewport->rect();
|
|
for (int i = 0; i < selection.count(); ++i) {
|
|
if (!selection.at(i).isValid())
|
|
continue;
|
|
QModelIndex parent = selection.at(i).topLeft().parent();
|
|
//we only display the children of the root in a listview
|
|
//we're not interested in the other model indexes
|
|
if (parent != d->root)
|
|
continue;
|
|
int t = selection.at(i).topLeft().row();
|
|
int b = selection.at(i).bottomRight().row();
|
|
if (d->viewMode == IconMode || d->isWrapping()) { // in non-static mode, we have to go through all selected items
|
|
for (int r = t; r <= b; ++r) {
|
|
const QRect &rect = visualRect(d->model->index(r, c, parent));
|
|
if (viewportRect.intersects(rect))
|
|
selectionRegion += rect;
|
|
}
|
|
} else { // in static mode, we can optimize a bit
|
|
while (t <= b && d->isHidden(t)) ++t;
|
|
while (b >= t && d->isHidden(b)) --b;
|
|
const QModelIndex top = d->model->index(t, c, parent);
|
|
const QModelIndex bottom = d->model->index(b, c, parent);
|
|
QRect rect(visualRect(top).topLeft(),
|
|
visualRect(bottom).bottomRight());
|
|
if (viewportRect.intersects(rect))
|
|
selectionRegion += rect;
|
|
}
|
|
}
|
|
|
|
return selectionRegion;
|
|
}
|
|
|
|
/*!
|
|
\reimp
|
|
*/
|
|
QModelIndexList QListView::selectedIndexes() const
|
|
{
|
|
Q_D(const QListView);
|
|
if (!d->selectionModel)
|
|
return QModelIndexList();
|
|
|
|
QModelIndexList viewSelected = d->selectionModel->selectedIndexes();
|
|
for (int i = 0; i < viewSelected.count(); ++i) {
|
|
const QModelIndex &index = viewSelected.at(i);
|
|
if (!isIndexHidden(index) && index.parent() == d->root && index.column() == d->column)
|
|
++i;
|
|
else
|
|
viewSelected.removeAt(i);
|
|
}
|
|
return viewSelected;
|
|
}
|
|
|
|
/*!
|
|
\internal
|
|
|
|
Layout the items according to the flow and wrapping properties.
|
|
*/
|
|
void QListView::doItemsLayout()
|
|
{
|
|
Q_D(QListView);
|
|
// showing the scroll bars will trigger a resize event,
|
|
// so we set the state to expanding to avoid
|
|
// triggering another layout
|
|
QAbstractItemView::State oldState = state();
|
|
setState(ExpandingState);
|
|
if (d->model->columnCount(d->root) > 0) { // no columns means no contents
|
|
d->resetBatchStartRow();
|
|
if (layoutMode() == SinglePass)
|
|
d->doItemsLayout(d->model->rowCount(d->root)); // layout everything
|
|
else if (!d->batchLayoutTimer.isActive()) {
|
|
if (!d->doItemsLayout(d->batchSize)) // layout is done
|
|
d->batchLayoutTimer.start(0, this); // do a new batch as fast as possible
|
|
}
|
|
}
|
|
QAbstractItemView::doItemsLayout();
|
|
setState(oldState); // restoring the oldState
|
|
}
|
|
|
|
/*!
|
|
\reimp
|
|
*/
|
|
void QListView::updateGeometries()
|
|
{
|
|
Q_D(QListView);
|
|
if (geometry().isEmpty() || d->model->rowCount(d->root) <= 0 || d->model->columnCount(d->root) <= 0) {
|
|
horizontalScrollBar()->setRange(0, 0);
|
|
verticalScrollBar()->setRange(0, 0);
|
|
} else {
|
|
QModelIndex index = d->model->index(0, d->column, d->root);
|
|
QStyleOptionViewItem option = d->viewOptionsV1();
|
|
QSize step = d->itemSize(option, index);
|
|
d->commonListView->updateHorizontalScrollBar(step);
|
|
d->commonListView->updateVerticalScrollBar(step);
|
|
}
|
|
|
|
QAbstractItemView::updateGeometries();
|
|
|
|
// if the scroll bars are turned off, we resize the contents to the viewport
|
|
if (d->movement == Static && !d->isWrapping()) {
|
|
d->layoutChildren(); // we need the viewport size to be updated
|
|
if (d->flow == TopToBottom) {
|
|
if (horizontalScrollBarPolicy() == Qt::ScrollBarAlwaysOff) {
|
|
d->setContentsSize(viewport()->width(), contentsSize().height());
|
|
horizontalScrollBar()->setRange(0, 0); // we see all the contents anyway
|
|
}
|
|
} else { // LeftToRight
|
|
if (verticalScrollBarPolicy() == Qt::ScrollBarAlwaysOff) {
|
|
d->setContentsSize(contentsSize().width(), viewport()->height());
|
|
verticalScrollBar()->setRange(0, 0); // we see all the contents anyway
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
/*!
|
|
\reimp
|
|
*/
|
|
bool QListView::isIndexHidden(const QModelIndex &index) const
|
|
{
|
|
Q_D(const QListView);
|
|
return (d->isHidden(index.row())
|
|
&& (index.parent() == d->root)
|
|
&& index.column() == d->column);
|
|
}
|
|
|
|
/*!
|
|
\property QListView::modelColumn
|
|
\brief the column in the model that is visible
|
|
|
|
By default, this property contains 0, indicating that the first
|
|
column in the model will be shown.
|
|
*/
|
|
void QListView::setModelColumn(int column)
|
|
{
|
|
Q_D(QListView);
|
|
if (column < 0 || column >= d->model->columnCount(d->root))
|
|
return;
|
|
d->column = column;
|
|
d->doDelayedItemsLayout();
|
|
}
|
|
|
|
int QListView::modelColumn() const
|
|
{
|
|
Q_D(const QListView);
|
|
return d->column;
|
|
}
|
|
|
|
/*!
|
|
\property QListView::uniformItemSizes
|
|
\brief whether all items in the listview have the same size
|
|
\since 4.1
|
|
|
|
This property should only be set to true if it is guaranteed that all items
|
|
in the view have the same size. This enables the view to do some
|
|
optimizations for performance purposes.
|
|
|
|
By default, this property is \c false.
|
|
*/
|
|
void QListView::setUniformItemSizes(bool enable)
|
|
{
|
|
Q_D(QListView);
|
|
d->uniformItemSizes = enable;
|
|
}
|
|
|
|
bool QListView::uniformItemSizes() const
|
|
{
|
|
Q_D(const QListView);
|
|
return d->uniformItemSizes;
|
|
}
|
|
|
|
/*!
|
|
\property QListView::wordWrap
|
|
\brief the item text word-wrapping policy
|
|
\since 4.2
|
|
|
|
If this property is \c true then the item text is wrapped where
|
|
necessary at word-breaks; otherwise it is not wrapped at all.
|
|
This property is \c false by default.
|
|
|
|
Please note that even if wrapping is enabled, the cell will not be
|
|
expanded to make room for the text. It will print ellipsis for
|
|
text that cannot be shown, according to the view's
|
|
\l{QAbstractItemView::}{textElideMode}.
|
|
*/
|
|
void QListView::setWordWrap(bool on)
|
|
{
|
|
Q_D(QListView);
|
|
if (d->wrapItemText == on)
|
|
return;
|
|
d->wrapItemText = on;
|
|
d->doDelayedItemsLayout();
|
|
}
|
|
|
|
bool QListView::wordWrap() const
|
|
{
|
|
Q_D(const QListView);
|
|
return d->wrapItemText;
|
|
}
|
|
|
|
/*!
|
|
\property QListView::selectionRectVisible
|
|
\brief if the selection rectangle should be visible
|
|
\since 4.3
|
|
|
|
If this property is \c true then the selection rectangle is visible;
|
|
otherwise it will be hidden.
|
|
|
|
\note The selection rectangle will only be visible if the selection mode
|
|
is in a mode where more than one item can be selected; i.e., it will not
|
|
draw a selection rectangle if the selection mode is
|
|
QAbstractItemView::SingleSelection.
|
|
|
|
By default, this property is \c false.
|
|
*/
|
|
void QListView::setSelectionRectVisible(bool show)
|
|
{
|
|
Q_D(QListView);
|
|
d->modeProperties |= uint(QListViewPrivate::SelectionRectVisible);
|
|
d->setSelectionRectVisible(show);
|
|
}
|
|
|
|
bool QListView::isSelectionRectVisible() const
|
|
{
|
|
Q_D(const QListView);
|
|
return d->isSelectionRectVisible();
|
|
}
|
|
|
|
/*!
|
|
\reimp
|
|
*/
|
|
bool QListView::event(QEvent *e)
|
|
{
|
|
return QAbstractItemView::event(e);
|
|
}
|
|
|
|
/*
|
|
* private object implementation
|
|
*/
|
|
|
|
QListViewPrivate::QListViewPrivate()
|
|
: QAbstractItemViewPrivate(),
|
|
commonListView(0),
|
|
wrap(false),
|
|
space(0),
|
|
flow(QListView::TopToBottom),
|
|
movement(QListView::Static),
|
|
resizeMode(QListView::Fixed),
|
|
layoutMode(QListView::SinglePass),
|
|
viewMode(QListView::ListMode),
|
|
modeProperties(0),
|
|
column(0),
|
|
uniformItemSizes(false),
|
|
batchSize(100),
|
|
showElasticBand(false)
|
|
{
|
|
}
|
|
|
|
QListViewPrivate::~QListViewPrivate()
|
|
{
|
|
delete commonListView;
|
|
}
|
|
|
|
void QListViewPrivate::clear()
|
|
{
|
|
// initialization of data structs
|
|
cachedItemSize = QSize();
|
|
commonListView->clear();
|
|
}
|
|
|
|
void QListViewPrivate::prepareItemsLayout()
|
|
{
|
|
Q_Q(QListView);
|
|
clear();
|
|
|
|
//take the size as if there were scrollbar in order to prevent scrollbar to blink
|
|
layoutBounds = QRect(QPoint(), q->maximumViewportSize());
|
|
|
|
int frameAroundContents = 0;
|
|
if (q->style()->styleHint(QStyle::SH_ScrollView_FrameOnlyAroundContents))
|
|
frameAroundContents = q->style()->pixelMetric(QStyle::PM_DefaultFrameWidth) * 2;
|
|
|
|
// maximumViewportSize() already takes scrollbar into account if policy is
|
|
// Qt::ScrollBarAlwaysOn but scrollbar extent must be deduced if policy
|
|
// is Qt::ScrollBarAsNeeded
|
|
int verticalMargin = vbarpolicy==Qt::ScrollBarAsNeeded
|
|
? q->style()->pixelMetric(QStyle::PM_ScrollBarExtent, 0, vbar) + frameAroundContents
|
|
: 0;
|
|
int horizontalMargin = hbarpolicy==Qt::ScrollBarAsNeeded
|
|
? q->style()->pixelMetric(QStyle::PM_ScrollBarExtent, 0, hbar) + frameAroundContents
|
|
: 0;
|
|
|
|
layoutBounds.adjust(0, 0, -verticalMargin, -horizontalMargin);
|
|
|
|
int rowCount = model->columnCount(root) <= 0 ? 0 : model->rowCount(root);
|
|
commonListView->setRowCount(rowCount);
|
|
}
|
|
|
|
/*!
|
|
\internal
|
|
*/
|
|
bool QListViewPrivate::doItemsLayout(int delta)
|
|
{
|
|
int max = model->rowCount(root) - 1;
|
|
int first = batchStartRow();
|
|
int last = qMin(first + delta - 1, max);
|
|
|
|
if (first == 0) {
|
|
layoutChildren(); // make sure the viewport has the right size
|
|
prepareItemsLayout();
|
|
}
|
|
|
|
if (max < 0 || last < first) {
|
|
return true; // nothing to do
|
|
}
|
|
|
|
QListViewLayoutInfo info;
|
|
info.bounds = layoutBounds;
|
|
info.grid = gridSize();
|
|
info.spacing = (info.grid.isValid() ? 0 : spacing());
|
|
info.first = first;
|
|
info.last = last;
|
|
info.wrap = isWrapping();
|
|
info.flow = flow;
|
|
info.max = max;
|
|
|
|
return commonListView->doBatchedItemLayout(info, max);
|
|
}
|
|
|
|
QListViewItem QListViewPrivate::indexToListViewItem(const QModelIndex &index) const
|
|
{
|
|
if (!index.isValid() || isHidden(index.row()))
|
|
return QListViewItem();
|
|
|
|
return commonListView->indexToListViewItem(index);
|
|
}
|
|
|
|
QRect QListViewPrivate::mapToViewport(const QRect &rect, bool extend) const
|
|
{
|
|
Q_Q(const QListView);
|
|
if (!rect.isValid())
|
|
return rect;
|
|
|
|
QRect result = extend ? commonListView->mapToViewport(rect) : rect;
|
|
int dx = -q->horizontalOffset();
|
|
int dy = -q->verticalOffset();
|
|
return result.adjusted(dx, dy, dx, dy);
|
|
}
|
|
|
|
QModelIndex QListViewPrivate::closestIndex(const QRect &target,
|
|
const QVector<QModelIndex> &candidates) const
|
|
{
|
|
int distance = 0;
|
|
int shortest = INT_MAX;
|
|
QModelIndex closest;
|
|
QVector<QModelIndex>::const_iterator it = candidates.begin();
|
|
|
|
for (; it != candidates.end(); ++it) {
|
|
if (!(*it).isValid())
|
|
continue;
|
|
|
|
const QRect indexRect = indexToListViewItem(*it).rect();
|
|
|
|
//if the center x (or y) position of an item is included in the rect of the other item,
|
|
//we define the distance between them as the difference in x (or y) of their respective center.
|
|
// Otherwise, we use the nahattan length between the 2 items
|
|
if ((target.center().x() >= indexRect.x() && target.center().x() < indexRect.right())
|
|
|| (indexRect.center().x() >= target.x() && indexRect.center().x() < target.right())) {
|
|
//one item's center is at the vertical of the other
|
|
distance = qAbs(indexRect.center().y() - target.center().y());
|
|
} else if ((target.center().y() >= indexRect.y() && target.center().y() < indexRect.bottom())
|
|
|| (indexRect.center().y() >= target.y() && indexRect.center().y() < target.bottom())) {
|
|
//one item's center is at the vertical of the other
|
|
distance = qAbs(indexRect.center().x() - target.center().x());
|
|
} else {
|
|
distance = (indexRect.center() - target.center()).manhattanLength();
|
|
}
|
|
if (distance < shortest) {
|
|
shortest = distance;
|
|
closest = *it;
|
|
}
|
|
}
|
|
return closest;
|
|
}
|
|
|
|
QSize QListViewPrivate::itemSize(const QStyleOptionViewItem &option, const QModelIndex &index) const
|
|
{
|
|
if (!uniformItemSizes) {
|
|
const QAbstractItemDelegate *delegate = delegateForIndex(index);
|
|
return delegate ? delegate->sizeHint(option, index) : QSize();
|
|
}
|
|
if (!cachedItemSize.isValid()) { // the last item is probaly the largest, so we use its size
|
|
int row = model->rowCount(root) - 1;
|
|
QModelIndex sample = model->index(row, column, root);
|
|
const QAbstractItemDelegate *delegate = delegateForIndex(sample);
|
|
cachedItemSize = delegate ? delegate->sizeHint(option, sample) : QSize();
|
|
}
|
|
return cachedItemSize;
|
|
}
|
|
|
|
QItemSelection QListViewPrivate::selection(const QRect &rect) const
|
|
{
|
|
QItemSelection selection;
|
|
QModelIndex tl, br;
|
|
const QVector<QModelIndex> intersectVector = intersectingSet(rect);
|
|
QVector<QModelIndex>::const_iterator it = intersectVector.begin();
|
|
for (; it != intersectVector.end(); ++it) {
|
|
if (!tl.isValid() && !br.isValid()) {
|
|
tl = br = *it;
|
|
} else if ((*it).row() == (tl.row() - 1)) {
|
|
tl = *it; // expand current range
|
|
} else if ((*it).row() == (br.row() + 1)) {
|
|
br = (*it); // expand current range
|
|
} else {
|
|
selection.select(tl, br); // select current range
|
|
tl = br = *it; // start new range
|
|
}
|
|
}
|
|
|
|
if (tl.isValid() && br.isValid())
|
|
selection.select(tl, br);
|
|
else if (tl.isValid())
|
|
selection.select(tl, tl);
|
|
else if (br.isValid())
|
|
selection.select(br, br);
|
|
|
|
return selection;
|
|
}
|
|
|
|
#ifndef QT_NO_DRAGANDDROP
|
|
QAbstractItemView::DropIndicatorPosition QListViewPrivate::position(const QPoint &pos, const QRect &rect, const QModelIndex &idx) const
|
|
{
|
|
if (viewMode == QListView::ListMode && flow == QListView::LeftToRight)
|
|
return static_cast<QListModeViewBase *>(commonListView)->position(pos, rect, idx);
|
|
else
|
|
return QAbstractItemViewPrivate::position(pos, rect, idx);
|
|
}
|
|
|
|
bool QListViewPrivate::dropOn(QDropEvent *event, int *dropRow, int *dropCol, QModelIndex *dropIndex)
|
|
{
|
|
if (viewMode == QListView::ListMode && flow == QListView::LeftToRight)
|
|
return static_cast<QListModeViewBase *>(commonListView)->dropOn(event, dropRow, dropCol, dropIndex);
|
|
else
|
|
return QAbstractItemViewPrivate::dropOn(event, dropRow, dropCol, dropIndex);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Common ListView Implementation
|
|
*/
|
|
|
|
void QCommonListViewBase::appendHiddenRow(int row)
|
|
{
|
|
dd->hiddenRows.insert(dd->model->index(row, 0, qq->rootIndex()));
|
|
}
|
|
|
|
void QCommonListViewBase::removeHiddenRow(int row)
|
|
{
|
|
dd->hiddenRows.remove(dd->model->index(row, 0, qq->rootIndex()));
|
|
}
|
|
|
|
#ifndef QT_NO_DRAGANDDROP
|
|
void QCommonListViewBase::paintDragDrop(QPainter *painter)
|
|
{
|
|
// FIXME: Until the we can provide a proper drop indicator
|
|
// in IconMode, it makes no sense to show it
|
|
dd->paintDropIndicator(painter);
|
|
}
|
|
#endif
|
|
|
|
void QCommonListViewBase::updateHorizontalScrollBar(const QSize & /*step*/)
|
|
{
|
|
horizontalScrollBar()->setPageStep(viewport()->width());
|
|
horizontalScrollBar()->setRange(0, contentsSize.width() - viewport()->width());
|
|
// we do not want to overwrite (a possible user set) single step
|
|
}
|
|
|
|
void QCommonListViewBase::updateVerticalScrollBar(const QSize & /*step*/)
|
|
{
|
|
verticalScrollBar()->setPageStep(viewport()->height());
|
|
verticalScrollBar()->setRange(0, contentsSize.height() - viewport()->height());
|
|
// we do not want to overwrite (a possible user set) single step
|
|
}
|
|
|
|
void QCommonListViewBase::scrollContentsBy(int dx, int dy, bool /*scrollElasticBand*/)
|
|
{
|
|
dd->scrollContentsBy(isRightToLeft() ? -dx : dx, dy);
|
|
}
|
|
|
|
int QCommonListViewBase::verticalScrollToValue(int /*index*/, QListView::ScrollHint hint,
|
|
bool above, bool below, const QRect &area, const QRect &rect) const
|
|
{
|
|
int verticalValue = verticalScrollBar()->value();
|
|
QRect adjusted = rect.adjusted(-spacing(), -spacing(), spacing(), spacing());
|
|
if (hint == QListView::PositionAtTop || above)
|
|
verticalValue += adjusted.top();
|
|
else if (hint == QListView::PositionAtBottom || below)
|
|
verticalValue += qMin(adjusted.top(), adjusted.bottom() - area.height() + 1);
|
|
else if (hint == QListView::PositionAtCenter)
|
|
verticalValue += adjusted.top() - ((area.height() - adjusted.height()) / 2);
|
|
return verticalValue;
|
|
}
|
|
|
|
int QCommonListViewBase::horizontalOffset() const
|
|
{
|
|
return (isRightToLeft() ? horizontalScrollBar()->maximum() - horizontalScrollBar()->value() : horizontalScrollBar()->value());
|
|
}
|
|
|
|
int QCommonListViewBase::horizontalScrollToValue(const int /*index*/, QListView::ScrollHint hint,
|
|
bool leftOf, bool rightOf, const QRect &area, const QRect &rect) const
|
|
{
|
|
int horizontalValue = horizontalScrollBar()->value();
|
|
if (isRightToLeft()) {
|
|
if (hint == QListView::PositionAtCenter) {
|
|
horizontalValue += ((area.width() - rect.width()) / 2) - rect.left();
|
|
} else {
|
|
if (leftOf)
|
|
horizontalValue -= rect.left();
|
|
else if (rightOf)
|
|
horizontalValue += qMin(rect.left(), area.width() - rect.right());
|
|
}
|
|
} else {
|
|
if (hint == QListView::PositionAtCenter) {
|
|
horizontalValue += rect.left() - ((area.width()- rect.width()) / 2);
|
|
} else {
|
|
if (leftOf)
|
|
horizontalValue += rect.left();
|
|
else if (rightOf)
|
|
horizontalValue += qMin(rect.left(), rect.right() - area.width());
|
|
}
|
|
}
|
|
return horizontalValue;
|
|
}
|
|
|
|
/*
|
|
* ListMode ListView Implementation
|
|
*/
|
|
|
|
#ifndef QT_NO_DRAGANDDROP
|
|
QAbstractItemView::DropIndicatorPosition QListModeViewBase::position(const QPoint &pos, const QRect &rect, const QModelIndex &index) const
|
|
{
|
|
QAbstractItemView::DropIndicatorPosition r = QAbstractItemView::OnViewport;
|
|
if (!dd->overwrite) {
|
|
const int margin = 2;
|
|
if (pos.x() - rect.left() < margin) {
|
|
r = QAbstractItemView::AboveItem; // Visually, on the left
|
|
} else if (rect.right() - pos.x() < margin) {
|
|
r = QAbstractItemView::BelowItem; // Visually, on the right
|
|
} else if (rect.contains(pos, true)) {
|
|
r = QAbstractItemView::OnItem;
|
|
}
|
|
} else {
|
|
QRect touchingRect = rect;
|
|
touchingRect.adjust(-1, -1, 1, 1);
|
|
if (touchingRect.contains(pos, false)) {
|
|
r = QAbstractItemView::OnItem;
|
|
}
|
|
}
|
|
|
|
if (r == QAbstractItemView::OnItem && (!(dd->model->flags(index) & Qt::ItemIsDropEnabled)))
|
|
r = pos.x() < rect.center().x() ? QAbstractItemView::AboveItem : QAbstractItemView::BelowItem;
|
|
|
|
return r;
|
|
}
|
|
|
|
void QListModeViewBase::dragMoveEvent(QDragMoveEvent *event)
|
|
{
|
|
if (qq->dragDropMode() == QAbstractItemView::InternalMove
|
|
&& (event->source() != qq || !(event->possibleActions() & Qt::MoveAction)))
|
|
return;
|
|
|
|
// ignore by default
|
|
event->ignore();
|
|
|
|
// can't use indexAt, doesn't account for spacing.
|
|
QPoint p = event->pos();
|
|
QRect rect(p.x() + horizontalOffset(), p.y() + verticalOffset(), 1, 1);
|
|
rect.adjust(-dd->spacing(), -dd->spacing(), dd->spacing(), dd->spacing());
|
|
const QVector<QModelIndex> intersectVector = dd->intersectingSet(rect);
|
|
QModelIndex index = intersectVector.count() > 0
|
|
? intersectVector.last() : QModelIndex();
|
|
dd->hover = index;
|
|
if (!dd->droppingOnItself(event, index)
|
|
&& dd->canDecode(event)) {
|
|
|
|
if (index.isValid() && dd->showDropIndicator) {
|
|
QRect rect = qq->visualRect(index);
|
|
dd->dropIndicatorPosition = position(event->pos(), rect, index);
|
|
// if spacing, should try to draw between items, not just next to item.
|
|
switch (dd->dropIndicatorPosition) {
|
|
case QAbstractItemView::AboveItem:
|
|
if (dd->isIndexDropEnabled(index.parent())) {
|
|
dd->dropIndicatorRect = QRect(rect.left()-dd->spacing(), rect.top(), 0, rect.height());
|
|
event->accept();
|
|
} else {
|
|
dd->dropIndicatorRect = QRect();
|
|
}
|
|
break;
|
|
case QAbstractItemView::BelowItem:
|
|
if (dd->isIndexDropEnabled(index.parent())) {
|
|
dd->dropIndicatorRect = QRect(rect.right()+dd->spacing(), rect.top(), 0, rect.height());
|
|
event->accept();
|
|
} else {
|
|
dd->dropIndicatorRect = QRect();
|
|
}
|
|
break;
|
|
case QAbstractItemView::OnItem:
|
|
if (dd->isIndexDropEnabled(index)) {
|
|
dd->dropIndicatorRect = rect;
|
|
event->accept();
|
|
} else {
|
|
dd->dropIndicatorRect = QRect();
|
|
}
|
|
break;
|
|
case QAbstractItemView::OnViewport:
|
|
dd->dropIndicatorRect = QRect();
|
|
if (dd->isIndexDropEnabled(qq->rootIndex())) {
|
|
event->accept(); // allow dropping in empty areas
|
|
}
|
|
break;
|
|
}
|
|
} else {
|
|
dd->dropIndicatorRect = QRect();
|
|
dd->dropIndicatorPosition = QAbstractItemView::OnViewport;
|
|
if (dd->isIndexDropEnabled(qq->rootIndex())) {
|
|
event->accept(); // allow dropping in empty areas
|
|
}
|
|
}
|
|
dd->viewport->update();
|
|
} // can decode
|
|
|
|
if (dd->shouldAutoScroll(event->pos()))
|
|
qq->startAutoScroll();
|
|
}
|
|
|
|
/*!
|
|
If the event hasn't already been accepted, determines the index to drop on.
|
|
|
|
if (row == -1 && col == -1)
|
|
// append to this drop index
|
|
else
|
|
// place at row, col in drop index
|
|
|
|
If it returns \c true a drop can be done, and dropRow, dropCol and dropIndex reflects the position of the drop.
|
|
\internal
|
|
*/
|
|
bool QListModeViewBase::dropOn(QDropEvent *event, int *dropRow, int *dropCol, QModelIndex *dropIndex)
|
|
{
|
|
if (event->isAccepted())
|
|
return false;
|
|
|
|
QModelIndex index;
|
|
if (dd->viewport->rect().contains(event->pos())) {
|
|
// can't use indexAt, doesn't account for spacing.
|
|
QPoint p = event->pos();
|
|
QRect rect(p.x() + horizontalOffset(), p.y() + verticalOffset(), 1, 1);
|
|
rect.adjust(-dd->spacing(), -dd->spacing(), dd->spacing(), dd->spacing());
|
|
const QVector<QModelIndex> intersectVector = dd->intersectingSet(rect);
|
|
index = intersectVector.count() > 0
|
|
? intersectVector.last() : QModelIndex();
|
|
if (!index.isValid())
|
|
index = dd->root;
|
|
}
|
|
|
|
// If we are allowed to do the drop
|
|
if (dd->model->supportedDropActions() & event->dropAction()) {
|
|
int row = -1;
|
|
int col = -1;
|
|
if (index != dd->root) {
|
|
dd->dropIndicatorPosition = position(event->pos(), qq->visualRect(index), index);
|
|
switch (dd->dropIndicatorPosition) {
|
|
case QAbstractItemView::AboveItem:
|
|
row = index.row();
|
|
col = index.column();
|
|
index = index.parent();
|
|
break;
|
|
case QAbstractItemView::BelowItem:
|
|
row = index.row() + 1;
|
|
col = index.column();
|
|
index = index.parent();
|
|
break;
|
|
case QAbstractItemView::OnItem:
|
|
case QAbstractItemView::OnViewport:
|
|
break;
|
|
}
|
|
} else {
|
|
dd->dropIndicatorPosition = QAbstractItemView::OnViewport;
|
|
}
|
|
*dropIndex = index;
|
|
*dropRow = row;
|
|
*dropCol = col;
|
|
if (!dd->droppingOnItself(event, index))
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
#endif //QT_NO_DRAGANDDROP
|
|
|
|
void QListModeViewBase::updateVerticalScrollBar(const QSize &step)
|
|
{
|
|
if (verticalScrollMode() == QAbstractItemView::ScrollPerItem
|
|
&& ((flow() == QListView::TopToBottom && !isWrapping())
|
|
|| (flow() == QListView::LeftToRight && isWrapping()))) {
|
|
const int steps = (flow() == QListView::TopToBottom ? scrollValueMap : segmentPositions).count() - 1;
|
|
if (steps > 0) {
|
|
const int pageSteps = perItemScrollingPageSteps(viewport()->height(), contentsSize.height(), isWrapping());
|
|
verticalScrollBar()->setSingleStep(1);
|
|
verticalScrollBar()->setPageStep(pageSteps);
|
|
verticalScrollBar()->setRange(0, steps - pageSteps);
|
|
} else {
|
|
verticalScrollBar()->setRange(0, 0);
|
|
}
|
|
// } else if (vertical && d->isWrapping() && d->movement == Static) {
|
|
// ### wrapped scrolling in flow direction
|
|
} else {
|
|
QCommonListViewBase::updateVerticalScrollBar(step);
|
|
}
|
|
}
|
|
|
|
void QListModeViewBase::updateHorizontalScrollBar(const QSize &step)
|
|
{
|
|
if (horizontalScrollMode() == QAbstractItemView::ScrollPerItem
|
|
&& ((flow() == QListView::TopToBottom && isWrapping())
|
|
|| (flow() == QListView::LeftToRight && !isWrapping()))) {
|
|
int steps = (flow() == QListView::TopToBottom ? segmentPositions : scrollValueMap).count() - 1;
|
|
if (steps > 0) {
|
|
const int pageSteps = perItemScrollingPageSteps(viewport()->width(), contentsSize.width(), isWrapping());
|
|
horizontalScrollBar()->setSingleStep(1);
|
|
horizontalScrollBar()->setPageStep(pageSteps);
|
|
horizontalScrollBar()->setRange(0, steps - pageSteps);
|
|
} else {
|
|
horizontalScrollBar()->setRange(0, 0);
|
|
}
|
|
} else {
|
|
QCommonListViewBase::updateHorizontalScrollBar(step);
|
|
}
|
|
}
|
|
|
|
int QListModeViewBase::verticalScrollToValue(int index, QListView::ScrollHint hint,
|
|
bool above, bool below, const QRect &area, const QRect &rect) const
|
|
{
|
|
if (verticalScrollMode() == QAbstractItemView::ScrollPerItem) {
|
|
int value;
|
|
if (scrollValueMap.isEmpty()) {
|
|
value = 0;
|
|
} else {
|
|
int scrollBarValue = verticalScrollBar()->value();
|
|
int numHidden = 0;
|
|
for (int i = 0; i < flowPositions.count() - 1 && i <= scrollBarValue; ++i)
|
|
if (isHidden(i))
|
|
++numHidden;
|
|
value = qBound(0, scrollValueMap.at(verticalScrollBar()->value()) - numHidden, flowPositions.count() - 1);
|
|
}
|
|
if (above)
|
|
hint = QListView::PositionAtTop;
|
|
else if (below)
|
|
hint = QListView::PositionAtBottom;
|
|
if (hint == QListView::EnsureVisible)
|
|
return value;
|
|
|
|
return perItemScrollToValue(index, value, area.height(), hint, Qt::Vertical, isWrapping(), rect.height());
|
|
}
|
|
|
|
return QCommonListViewBase::verticalScrollToValue(index, hint, above, below, area, rect);
|
|
}
|
|
|
|
int QListModeViewBase::horizontalOffset() const
|
|
{
|
|
if (horizontalScrollMode() == QAbstractItemView::ScrollPerItem) {
|
|
if (isWrapping()) {
|
|
if (flow() == QListView::TopToBottom && !segmentPositions.isEmpty()) {
|
|
const int max = segmentPositions.count() - 1;
|
|
int currentValue = qBound(0, horizontalScrollBar()->value(), max);
|
|
int position = segmentPositions.at(currentValue);
|
|
int maximumValue = qBound(0, horizontalScrollBar()->maximum(), max);
|
|
int maximum = segmentPositions.at(maximumValue);
|
|
return (isRightToLeft() ? maximum - position : position);
|
|
}
|
|
} else if (flow() == QListView::LeftToRight && !flowPositions.isEmpty()) {
|
|
int position = flowPositions.at(scrollValueMap.at(horizontalScrollBar()->value()));
|
|
int maximum = flowPositions.at(scrollValueMap.at(horizontalScrollBar()->maximum()));
|
|
return (isRightToLeft() ? maximum - position : position);
|
|
}
|
|
}
|
|
return QCommonListViewBase::horizontalOffset();
|
|
}
|
|
|
|
int QListModeViewBase::verticalOffset() const
|
|
{
|
|
if (verticalScrollMode() == QAbstractItemView::ScrollPerItem) {
|
|
if (isWrapping()) {
|
|
if (flow() == QListView::LeftToRight && !segmentPositions.isEmpty()) {
|
|
int value = verticalScrollBar()->value();
|
|
if (value >= segmentPositions.count())
|
|
return 0;
|
|
return segmentPositions.at(value) - spacing();
|
|
}
|
|
} else if (flow() == QListView::TopToBottom && !flowPositions.isEmpty()) {
|
|
int value = verticalScrollBar()->value();
|
|
if (value > scrollValueMap.count())
|
|
return 0;
|
|
return flowPositions.at(scrollValueMap.at(value)) - spacing();
|
|
}
|
|
}
|
|
return QCommonListViewBase::verticalOffset();
|
|
}
|
|
|
|
int QListModeViewBase::horizontalScrollToValue(int index, QListView::ScrollHint hint,
|
|
bool leftOf, bool rightOf, const QRect &area, const QRect &rect) const
|
|
{
|
|
if (horizontalScrollMode() != QAbstractItemView::ScrollPerItem)
|
|
return QCommonListViewBase::horizontalScrollToValue(index, hint, leftOf, rightOf, area, rect);
|
|
|
|
int value;
|
|
if (scrollValueMap.isEmpty())
|
|
value = 0;
|
|
else
|
|
value = qBound(0, scrollValueMap.at(horizontalScrollBar()->value()), flowPositions.count() - 1);
|
|
if (leftOf)
|
|
hint = QListView::PositionAtTop;
|
|
else if (rightOf)
|
|
hint = QListView::PositionAtBottom;
|
|
if (hint == QListView::EnsureVisible)
|
|
return value;
|
|
|
|
return perItemScrollToValue(index, value, area.width(), hint, Qt::Horizontal, isWrapping(), rect.width());
|
|
}
|
|
|
|
void QListModeViewBase::scrollContentsBy(int dx, int dy, bool scrollElasticBand)
|
|
{
|
|
// ### reorder this logic
|
|
const int verticalValue = verticalScrollBar()->value();
|
|
const int horizontalValue = horizontalScrollBar()->value();
|
|
const bool vertical = (verticalScrollMode() == QAbstractItemView::ScrollPerItem);
|
|
const bool horizontal = (horizontalScrollMode() == QAbstractItemView::ScrollPerItem);
|
|
|
|
if (isWrapping()) {
|
|
if (segmentPositions.isEmpty())
|
|
return;
|
|
const int max = segmentPositions.count() - 1;
|
|
if (horizontal && flow() == QListView::TopToBottom && dx != 0) {
|
|
int currentValue = qBound(0, horizontalValue, max);
|
|
int previousValue = qBound(0, currentValue + dx, max);
|
|
int currentCoordinate = segmentPositions.at(currentValue) - spacing();
|
|
int previousCoordinate = segmentPositions.at(previousValue) - spacing();
|
|
dx = previousCoordinate - currentCoordinate;
|
|
} else if (vertical && flow() == QListView::LeftToRight && dy != 0) {
|
|
int currentValue = qBound(0, verticalValue, max);
|
|
int previousValue = qBound(0, currentValue + dy, max);
|
|
int currentCoordinate = segmentPositions.at(currentValue) - spacing();
|
|
int previousCoordinate = segmentPositions.at(previousValue) - spacing();
|
|
dy = previousCoordinate - currentCoordinate;
|
|
}
|
|
} else {
|
|
if (flowPositions.isEmpty())
|
|
return;
|
|
const int max = scrollValueMap.count() - 1;
|
|
if (vertical && flow() == QListView::TopToBottom && dy != 0) {
|
|
int currentValue = qBound(0, verticalValue, max);
|
|
int previousValue = qBound(0, currentValue + dy, max);
|
|
int currentCoordinate = flowPositions.at(scrollValueMap.at(currentValue));
|
|
int previousCoordinate = flowPositions.at(scrollValueMap.at(previousValue));
|
|
dy = previousCoordinate - currentCoordinate;
|
|
} else if (horizontal && flow() == QListView::LeftToRight && dx != 0) {
|
|
int currentValue = qBound(0, horizontalValue, max);
|
|
int previousValue = qBound(0, currentValue + dx, max);
|
|
int currentCoordinate = flowPositions.at(scrollValueMap.at(currentValue));
|
|
int previousCoordinate = flowPositions.at(scrollValueMap.at(previousValue));
|
|
dx = previousCoordinate - currentCoordinate;
|
|
}
|
|
}
|
|
QCommonListViewBase::scrollContentsBy(dx, dy, scrollElasticBand);
|
|
}
|
|
|
|
bool QListModeViewBase::doBatchedItemLayout(const QListViewLayoutInfo &info, int max)
|
|
{
|
|
doStaticLayout(info);
|
|
if (batchStartRow > max) { // stop items layout
|
|
flowPositions.resize(flowPositions.count());
|
|
segmentPositions.resize(segmentPositions.count());
|
|
segmentStartRows.resize(segmentStartRows.count());
|
|
return true; // done
|
|
}
|
|
return false; // not done
|
|
}
|
|
|
|
QListViewItem QListModeViewBase::indexToListViewItem(const QModelIndex &index) const
|
|
{
|
|
if (flowPositions.isEmpty()
|
|
|| segmentPositions.isEmpty()
|
|
|| index.row() >= flowPositions.count())
|
|
return QListViewItem();
|
|
|
|
const int segment = qBinarySearch<int>(segmentStartRows, index.row(),
|
|
0, segmentStartRows.count() - 1);
|
|
|
|
|
|
QStyleOptionViewItem options = viewOptions();
|
|
options.rect.setSize(contentsSize);
|
|
QSize size = (uniformItemSizes() && cachedItemSize().isValid())
|
|
? cachedItemSize() : itemSize(options, index);
|
|
|
|
QPoint pos;
|
|
if (flow() == QListView::LeftToRight) {
|
|
pos.setX(flowPositions.at(index.row()));
|
|
pos.setY(segmentPositions.at(segment));
|
|
} else { // TopToBottom
|
|
pos.setY(flowPositions.at(index.row()));
|
|
pos.setX(segmentPositions.at(segment));
|
|
if (isWrapping()) { // make the items as wide as the segment
|
|
int right = (segment + 1 >= segmentPositions.count()
|
|
? contentsSize.width()
|
|
: segmentPositions.at(segment + 1));
|
|
size.setWidth(right - pos.x());
|
|
} else { // make the items as wide as the viewport
|
|
size.setWidth(qMax(size.width(), viewport()->width() - 2 * spacing()));
|
|
}
|
|
}
|
|
|
|
return QListViewItem(QRect(pos, size), index.row());
|
|
}
|
|
|
|
QPoint QListModeViewBase::initStaticLayout(const QListViewLayoutInfo &info)
|
|
{
|
|
int x, y;
|
|
if (info.first == 0) {
|
|
flowPositions.clear();
|
|
segmentPositions.clear();
|
|
segmentStartRows.clear();
|
|
segmentExtents.clear();
|
|
scrollValueMap.clear();
|
|
x = info.bounds.left() + info.spacing;
|
|
y = info.bounds.top() + info.spacing;
|
|
segmentPositions.append(info.flow == QListView::LeftToRight ? y : x);
|
|
segmentStartRows.append(0);
|
|
} else if (info.wrap) {
|
|
if (info.flow == QListView::LeftToRight) {
|
|
x = batchSavedPosition;
|
|
y = segmentPositions.last();
|
|
} else { // flow == QListView::TopToBottom
|
|
x = segmentPositions.last();
|
|
y = batchSavedPosition;
|
|
}
|
|
} else { // not first and not wrap
|
|
if (info.flow == QListView::LeftToRight) {
|
|
x = batchSavedPosition;
|
|
y = info.bounds.top() + info.spacing;
|
|
} else { // flow == QListView::TopToBottom
|
|
x = info.bounds.left() + info.spacing;
|
|
y = batchSavedPosition;
|
|
}
|
|
}
|
|
return QPoint(x, y);
|
|
}
|
|
|
|
/*!
|
|
\internal
|
|
*/
|
|
void QListModeViewBase::doStaticLayout(const QListViewLayoutInfo &info)
|
|
{
|
|
const bool useItemSize = !info.grid.isValid();
|
|
const QPoint topLeft = initStaticLayout(info);
|
|
QStyleOptionViewItem option = viewOptions();
|
|
option.rect = info.bounds;
|
|
option.rect.adjust(info.spacing, info.spacing, -info.spacing, -info.spacing);
|
|
|
|
// The static layout data structures are as follows:
|
|
// One vector contains the coordinate in the direction of layout flow.
|
|
// Another vector contains the coordinates of the segments.
|
|
// A third vector contains the index (model row) of the first item
|
|
// of each segment.
|
|
|
|
int segStartPosition;
|
|
int segEndPosition;
|
|
int deltaFlowPosition;
|
|
int deltaSegPosition;
|
|
int deltaSegHint;
|
|
int flowPosition;
|
|
int segPosition;
|
|
|
|
if (info.flow == QListView::LeftToRight) {
|
|
segStartPosition = info.bounds.left();
|
|
segEndPosition = info.bounds.width();
|
|
flowPosition = topLeft.x();
|
|
segPosition = topLeft.y();
|
|
deltaFlowPosition = info.grid.width(); // dx
|
|
deltaSegPosition = useItemSize ? batchSavedDeltaSeg : info.grid.height(); // dy
|
|
deltaSegHint = info.grid.height();
|
|
} else { // flow == QListView::TopToBottom
|
|
segStartPosition = info.bounds.top();
|
|
segEndPosition = info.bounds.height();
|
|
flowPosition = topLeft.y();
|
|
segPosition = topLeft.x();
|
|
deltaFlowPosition = info.grid.height(); // dy
|
|
deltaSegPosition = useItemSize ? batchSavedDeltaSeg : info.grid.width(); // dx
|
|
deltaSegHint = info.grid.width();
|
|
}
|
|
|
|
for (int row = info.first; row <= info.last; ++row) {
|
|
if (isHidden(row)) { // ###
|
|
flowPositions.append(flowPosition);
|
|
} else {
|
|
// if we are not using a grid, we need to find the deltas
|
|
if (useItemSize) {
|
|
QSize hint = itemSize(option, modelIndex(row));
|
|
if (info.flow == QListView::LeftToRight) {
|
|
deltaFlowPosition = hint.width() + info.spacing;
|
|
deltaSegHint = hint.height() + info.spacing;
|
|
} else { // TopToBottom
|
|
deltaFlowPosition = hint.height() + info.spacing;
|
|
deltaSegHint = hint.width() + info.spacing;
|
|
}
|
|
}
|
|
// create new segment
|
|
if (info.wrap && (flowPosition + deltaFlowPosition >= segEndPosition)) {
|
|
segmentExtents.append(flowPosition);
|
|
flowPosition = info.spacing + segStartPosition;
|
|
segPosition += deltaSegPosition;
|
|
if (info.wrap)
|
|
segPosition += info.spacing;
|
|
segmentPositions.append(segPosition);
|
|
segmentStartRows.append(row);
|
|
deltaSegPosition = 0;
|
|
}
|
|
// save the flow position of this item
|
|
scrollValueMap.append(flowPositions.count());
|
|
flowPositions.append(flowPosition);
|
|
// prepare for the next item
|
|
deltaSegPosition = qMax(deltaSegHint, deltaSegPosition);
|
|
flowPosition += info.spacing + deltaFlowPosition;
|
|
}
|
|
}
|
|
// used when laying out next batch
|
|
batchSavedPosition = flowPosition;
|
|
batchSavedDeltaSeg = deltaSegPosition;
|
|
batchStartRow = info.last + 1;
|
|
if (info.last == info.max)
|
|
flowPosition -= info.spacing; // remove extra spacing
|
|
// set the contents size
|
|
QRect rect = info.bounds;
|
|
if (info.flow == QListView::LeftToRight) {
|
|
rect.setRight(segmentPositions.count() == 1 ? flowPosition : info.bounds.right());
|
|
rect.setBottom(segPosition + deltaSegPosition);
|
|
} else { // TopToBottom
|
|
rect.setRight(segPosition + deltaSegPosition);
|
|
rect.setBottom(segmentPositions.count() == 1 ? flowPosition : info.bounds.bottom());
|
|
}
|
|
contentsSize = QSize(rect.right(), rect.bottom());
|
|
// if it is the last batch, save the end of the segments
|
|
if (info.last == info.max) {
|
|
segmentExtents.append(flowPosition);
|
|
scrollValueMap.append(flowPositions.count());
|
|
flowPositions.append(flowPosition);
|
|
segmentPositions.append(info.wrap ? segPosition + deltaSegPosition : INT_MAX);
|
|
}
|
|
// if the new items are visble, update the viewport
|
|
QRect changedRect(topLeft, rect.bottomRight());
|
|
if (clipRect().intersects(changedRect))
|
|
viewport()->update();
|
|
}
|
|
|
|
/*!
|
|
\internal
|
|
Finds the set of items intersecting with \a area.
|
|
In this function, itemsize is counted from topleft to the start of the next item.
|
|
*/
|
|
QVector<QModelIndex> QListModeViewBase::intersectingSet(const QRect &area) const
|
|
{
|
|
QVector<QModelIndex> ret;
|
|
int segStartPosition;
|
|
int segEndPosition;
|
|
int flowStartPosition;
|
|
int flowEndPosition;
|
|
if (flow() == QListView::LeftToRight) {
|
|
segStartPosition = area.top();
|
|
segEndPosition = area.bottom();
|
|
flowStartPosition = area.left();
|
|
flowEndPosition = area.right();
|
|
} else {
|
|
segStartPosition = area.left();
|
|
segEndPosition = area.right();
|
|
flowStartPosition = area.top();
|
|
flowEndPosition = area.bottom();
|
|
}
|
|
if (segmentPositions.count() < 2 || flowPositions.isEmpty())
|
|
return ret;
|
|
// the last segment position is actually the edge of the last segment
|
|
const int segLast = segmentPositions.count() - 2;
|
|
int seg = qBinarySearch<int>(segmentPositions, segStartPosition, 0, segLast + 1);
|
|
for (; seg <= segLast && segmentPositions.at(seg) <= segEndPosition; ++seg) {
|
|
int first = segmentStartRows.at(seg);
|
|
int last = (seg < segLast ? segmentStartRows.at(seg + 1) : batchStartRow) - 1;
|
|
if (segmentExtents.at(seg) < flowStartPosition)
|
|
continue;
|
|
int row = qBinarySearch<int>(flowPositions, flowStartPosition, first, last);
|
|
for (; row <= last && flowPositions.at(row) <= flowEndPosition; ++row) {
|
|
if (isHidden(row))
|
|
continue;
|
|
QModelIndex index = modelIndex(row);
|
|
if (index.isValid())
|
|
ret += index;
|
|
#if 0 // for debugging
|
|
else
|
|
qWarning("intersectingSet: row %d was invalid", row);
|
|
#endif
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
void QListModeViewBase::dataChanged(const QModelIndex &, const QModelIndex &)
|
|
{
|
|
dd->doDelayedItemsLayout();
|
|
}
|
|
|
|
|
|
QRect QListModeViewBase::mapToViewport(const QRect &rect) const
|
|
{
|
|
if (isWrapping())
|
|
return rect;
|
|
// If the listview is in "listbox-mode", the items are as wide as the view.
|
|
// But we don't shrink the items.
|
|
QRect result = rect;
|
|
if (flow() == QListView::TopToBottom) {
|
|
result.setLeft(spacing());
|
|
result.setWidth(qMax(rect.width(), qMax(contentsSize.width(), viewport()->width()) - 2 * spacing()));
|
|
} else { // LeftToRight
|
|
result.setTop(spacing());
|
|
result.setHeight(qMax(rect.height(), qMax(contentsSize.height(), viewport()->height()) - 2 * spacing()));
|
|
}
|
|
return result;
|
|
}
|
|
|
|
int QListModeViewBase::perItemScrollingPageSteps(int length, int bounds, bool wrap) const
|
|
{
|
|
QVector<int> positions;
|
|
if (wrap)
|
|
positions = segmentPositions;
|
|
else if (!flowPositions.isEmpty()) {
|
|
positions.reserve(scrollValueMap.size());
|
|
foreach (int itemShown, scrollValueMap)
|
|
positions.append(flowPositions.at(itemShown));
|
|
}
|
|
if (positions.isEmpty() || bounds <= length)
|
|
return positions.count();
|
|
if (uniformItemSizes()) {
|
|
for (int i = 1; i < positions.count(); ++i)
|
|
if (positions.at(i) > 0)
|
|
return length / positions.at(i);
|
|
return 0; // all items had height 0
|
|
}
|
|
int pageSteps = 0;
|
|
int steps = positions.count() - 1;
|
|
int max = qMax(length, bounds);
|
|
int min = qMin(length, bounds);
|
|
int pos = min - (max - positions.last());
|
|
|
|
while (pos >= 0 && steps > 0) {
|
|
pos -= (positions.at(steps) - positions.at(steps - 1));
|
|
if (pos >= 0) //this item should be visible
|
|
++pageSteps;
|
|
--steps;
|
|
}
|
|
|
|
// at this point we know that positions has at least one entry
|
|
return qMax(pageSteps, 1);
|
|
}
|
|
|
|
int QListModeViewBase::perItemScrollToValue(int index, int scrollValue, int viewportSize,
|
|
QAbstractItemView::ScrollHint hint,
|
|
Qt::Orientation orientation, bool wrap, int itemExtent) const
|
|
{
|
|
if (index < 0)
|
|
return scrollValue;
|
|
|
|
itemExtent += spacing();
|
|
QVector<int> visibleFlowPositions;
|
|
visibleFlowPositions.reserve(flowPositions.count() - 1);
|
|
for (int i = 0; i < flowPositions.count() - 1; i++) { // flowPositions count is +1 larger than actual row count
|
|
if (!isHidden(i))
|
|
visibleFlowPositions.append(flowPositions.at(i));
|
|
}
|
|
|
|
if (!wrap) {
|
|
int topIndex = index;
|
|
const int bottomIndex = topIndex;
|
|
const int bottomCoordinate = visibleFlowPositions.at(index);
|
|
|
|
while (topIndex > 0 &&
|
|
(bottomCoordinate - visibleFlowPositions.at(topIndex - 1) + itemExtent) <= (viewportSize)) {
|
|
topIndex--;
|
|
}
|
|
|
|
const int itemCount = bottomIndex - topIndex + 1;
|
|
switch (hint) {
|
|
case QAbstractItemView::PositionAtTop:
|
|
return index;
|
|
case QAbstractItemView::PositionAtBottom:
|
|
return index - itemCount + 1;
|
|
case QAbstractItemView::PositionAtCenter:
|
|
return index - (itemCount / 2);
|
|
default:
|
|
break;
|
|
}
|
|
} else { // wrapping
|
|
Qt::Orientation flowOrientation = (flow() == QListView::LeftToRight
|
|
? Qt::Horizontal : Qt::Vertical);
|
|
if (flowOrientation == orientation) { // scrolling in the "flow" direction
|
|
// ### wrapped scrolling in the flow direction
|
|
return visibleFlowPositions.at(index); // ### always pixel based for now
|
|
} else if (!segmentStartRows.isEmpty()) { // we are scrolling in the "segment" direction
|
|
int segment = qBinarySearch<int>(segmentStartRows, index, 0, segmentStartRows.count() - 1);
|
|
int leftSegment = segment;
|
|
const int rightSegment = leftSegment;
|
|
const int bottomCoordinate = segmentPositions.at(segment);
|
|
|
|
while (leftSegment > scrollValue &&
|
|
(bottomCoordinate - segmentPositions.at(leftSegment-1) + itemExtent) <= (viewportSize)) {
|
|
leftSegment--;
|
|
}
|
|
|
|
const int segmentCount = rightSegment - leftSegment + 1;
|
|
switch (hint) {
|
|
case QAbstractItemView::PositionAtTop:
|
|
return segment;
|
|
case QAbstractItemView::PositionAtBottom:
|
|
return segment - segmentCount + 1;
|
|
case QAbstractItemView::PositionAtCenter:
|
|
return segment - (segmentCount / 2);
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return scrollValue;
|
|
}
|
|
|
|
void QListModeViewBase::clear()
|
|
{
|
|
flowPositions.clear();
|
|
segmentPositions.clear();
|
|
segmentStartRows.clear();
|
|
segmentExtents.clear();
|
|
batchSavedPosition = 0;
|
|
batchStartRow = 0;
|
|
batchSavedDeltaSeg = 0;
|
|
}
|
|
|
|
/*
|
|
* IconMode ListView Implementation
|
|
*/
|
|
|
|
void QIconModeViewBase::setPositionForIndex(const QPoint &position, const QModelIndex &index)
|
|
{
|
|
if (index.row() >= items.count())
|
|
return;
|
|
const QSize oldContents = contentsSize;
|
|
qq->update(index); // update old position
|
|
moveItem(index.row(), position);
|
|
qq->update(index); // update new position
|
|
|
|
if (contentsSize != oldContents)
|
|
dd->viewUpdateGeometries(); // update the scroll bars
|
|
}
|
|
|
|
void QIconModeViewBase::appendHiddenRow(int row)
|
|
{
|
|
if (row >= 0 && row < items.count()) //remove item
|
|
tree.removeLeaf(items.at(row).rect(), row);
|
|
QCommonListViewBase::appendHiddenRow(row);
|
|
}
|
|
|
|
void QIconModeViewBase::removeHiddenRow(int row)
|
|
{
|
|
QCommonListViewBase::removeHiddenRow(row);
|
|
if (row >= 0 && row < items.count()) //insert item
|
|
tree.insertLeaf(items.at(row).rect(), row);
|
|
}
|
|
|
|
#ifndef QT_NO_DRAGANDDROP
|
|
bool QIconModeViewBase::filterStartDrag(Qt::DropActions supportedActions)
|
|
{
|
|
// This function does the same thing as in QAbstractItemView::startDrag(),
|
|
// plus adding viewitems to the draggedItems list.
|
|
// We need these items to draw the drag items
|
|
QModelIndexList indexes = dd->selectionModel->selectedIndexes();
|
|
if (indexes.count() > 0 ) {
|
|
if (viewport()->acceptDrops()) {
|
|
QModelIndexList::ConstIterator it = indexes.constBegin();
|
|
for (; it != indexes.constEnd(); ++it)
|
|
if (dd->model->flags(*it) & Qt::ItemIsDragEnabled
|
|
&& (*it).column() == dd->column)
|
|
draggedItems.push_back(*it);
|
|
}
|
|
|
|
QRect rect;
|
|
QPixmap pixmap = dd->renderToPixmap(indexes, &rect);
|
|
rect.adjust(horizontalOffset(), verticalOffset(), 0, 0);
|
|
QDrag *drag = new QDrag(qq);
|
|
drag->setMimeData(dd->model->mimeData(indexes));
|
|
drag->setPixmap(pixmap);
|
|
drag->setHotSpot(dd->pressedPosition - rect.topLeft());
|
|
Qt::DropAction action = drag->exec(supportedActions, Qt::CopyAction);
|
|
draggedItems.clear();
|
|
if (action == Qt::MoveAction)
|
|
dd->clearOrRemove();
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool QIconModeViewBase::filterDropEvent(QDropEvent *e)
|
|
{
|
|
if (e->source() != qq)
|
|
return false;
|
|
|
|
const QSize contents = contentsSize;
|
|
QPoint offset(horizontalOffset(), verticalOffset());
|
|
QPoint end = e->pos() + offset;
|
|
if (qq->acceptDrops()) {
|
|
const Qt::ItemFlags dropableFlags = Qt::ItemIsDropEnabled|Qt::ItemIsEnabled;
|
|
const QVector<QModelIndex> &dropIndices = intersectingSet(QRect(end, QSize(1, 1)));
|
|
foreach (const QModelIndex &index, dropIndices)
|
|
if ((index.flags() & dropableFlags) == dropableFlags)
|
|
return false;
|
|
}
|
|
QPoint start = dd->pressedPosition;
|
|
QPoint delta = (dd->movement == QListView::Snap ? snapToGrid(end) - snapToGrid(start) : end - start);
|
|
QList<QModelIndex> indexes = dd->selectionModel->selectedIndexes();
|
|
for (int i = 0; i < indexes.count(); ++i) {
|
|
QModelIndex index = indexes.at(i);
|
|
QRect rect = dd->rectForIndex(index);
|
|
viewport()->update(dd->mapToViewport(rect, false));
|
|
QPoint dest = rect.topLeft() + delta;
|
|
if (qq->isRightToLeft())
|
|
dest.setX(dd->flipX(dest.x()) - rect.width());
|
|
moveItem(index.row(), dest);
|
|
qq->update(index);
|
|
}
|
|
dd->stopAutoScroll();
|
|
draggedItems.clear();
|
|
dd->emitIndexesMoved(indexes);
|
|
e->accept(); // we have handled the event
|
|
// if the size has not grown, we need to check if it has shrinked
|
|
if (contentsSize != contents) {
|
|
if ((contentsSize.width() <= contents.width()
|
|
|| contentsSize.height() <= contents.height())) {
|
|
updateContentsSize();
|
|
}
|
|
dd->viewUpdateGeometries();
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool QIconModeViewBase::filterDragLeaveEvent(QDragLeaveEvent *e)
|
|
{
|
|
viewport()->update(draggedItemsRect()); // erase the area
|
|
draggedItemsPos = QPoint(-1, -1); // don't draw the dragged items
|
|
return QCommonListViewBase::filterDragLeaveEvent(e);
|
|
}
|
|
|
|
bool QIconModeViewBase::filterDragMoveEvent(QDragMoveEvent *e)
|
|
{
|
|
if (e->source() != qq || !dd->canDecode(e))
|
|
return false;
|
|
|
|
// ignore by default
|
|
e->ignore();
|
|
// get old dragged items rect
|
|
QRect itemsRect = this->itemsRect(draggedItems);
|
|
viewport()->update(itemsRect.translated(draggedItemsDelta()));
|
|
// update position
|
|
draggedItemsPos = e->pos();
|
|
// get new items rect
|
|
viewport()->update(itemsRect.translated(draggedItemsDelta()));
|
|
// set the item under the cursor to current
|
|
QModelIndex index;
|
|
if (movement() == QListView::Snap) {
|
|
QRect rect(snapToGrid(e->pos() + offset()), gridSize());
|
|
const QVector<QModelIndex> intersectVector = intersectingSet(rect);
|
|
index = intersectVector.count() > 0 ? intersectVector.last() : QModelIndex();
|
|
} else {
|
|
index = qq->indexAt(e->pos());
|
|
}
|
|
// check if we allow drops here
|
|
if (draggedItems.contains(index))
|
|
e->accept(); // allow changing item position
|
|
else if (dd->model->flags(index) & Qt::ItemIsDropEnabled)
|
|
e->accept(); // allow dropping on dropenabled items
|
|
else if (!index.isValid())
|
|
e->accept(); // allow dropping in empty areas
|
|
|
|
// the event was treated. do autoscrolling
|
|
if (dd->shouldAutoScroll(e->pos()))
|
|
dd->startAutoScroll();
|
|
return true;
|
|
}
|
|
#endif // QT_NO_DRAGANDDROP
|
|
|
|
void QIconModeViewBase::setRowCount(int rowCount)
|
|
{
|
|
tree.create(qMax(rowCount - hiddenCount(), 0));
|
|
}
|
|
|
|
void QIconModeViewBase::scrollContentsBy(int dx, int dy, bool scrollElasticBand)
|
|
{
|
|
if (scrollElasticBand)
|
|
dd->scrollElasticBandBy(isRightToLeft() ? -dx : dx, dy);
|
|
|
|
QCommonListViewBase::scrollContentsBy(dx, dy, scrollElasticBand);
|
|
if (!draggedItems.isEmpty())
|
|
viewport()->update(draggedItemsRect().translated(dx, dy));
|
|
}
|
|
|
|
void QIconModeViewBase::dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight)
|
|
{
|
|
if (column() >= topLeft.column() && column() <= bottomRight.column()) {
|
|
QStyleOptionViewItem option = viewOptions();
|
|
int bottom = qMin(items.count(), bottomRight.row() + 1);
|
|
for (int row = topLeft.row(); row < bottom; ++row)
|
|
items[row].resize(itemSize(option, modelIndex(row)));
|
|
}
|
|
}
|
|
|
|
bool QIconModeViewBase::doBatchedItemLayout(const QListViewLayoutInfo &info, int max)
|
|
{
|
|
if (info.last >= items.count()) {
|
|
//first we create the items
|
|
QStyleOptionViewItem option = viewOptions();
|
|
for (int row = items.count(); row <= info.last; ++row) {
|
|
QSize size = itemSize(option, modelIndex(row));
|
|
QListViewItem item(QRect(0, 0, size.width(), size.height()), row); // default pos
|
|
items.append(item);
|
|
}
|
|
doDynamicLayout(info);
|
|
}
|
|
return (batchStartRow > max); // done
|
|
}
|
|
|
|
QListViewItem QIconModeViewBase::indexToListViewItem(const QModelIndex &index) const
|
|
{
|
|
if (index.isValid() && index.row() < items.count())
|
|
return items.at(index.row());
|
|
return QListViewItem();
|
|
}
|
|
|
|
void QIconModeViewBase::initBspTree(const QSize &contents)
|
|
{
|
|
// remove all items from the tree
|
|
int leafCount = tree.leafCount();
|
|
for (int l = 0; l < leafCount; ++l)
|
|
tree.leaf(l).clear();
|
|
// we have to get the bounding rect of the items before we can initialize the tree
|
|
QBspTree::Node::Type type = QBspTree::Node::Both; // 2D
|
|
// simple heuristics to get better bsp
|
|
if (contents.height() / contents.width() >= 3)
|
|
type = QBspTree::Node::HorizontalPlane;
|
|
else if (contents.width() / contents.height() >= 3)
|
|
type = QBspTree::Node::VerticalPlane;
|
|
// build tree for the bounding rect (not just the contents rect)
|
|
tree.init(QRect(0, 0, contents.width(), contents.height()), type);
|
|
}
|
|
|
|
QPoint QIconModeViewBase::initDynamicLayout(const QListViewLayoutInfo &info)
|
|
{
|
|
int x, y;
|
|
if (info.first == 0) {
|
|
x = info.bounds.x() + info.spacing;
|
|
y = info.bounds.y() + info.spacing;
|
|
items.reserve(rowCount() - hiddenCount());
|
|
} else {
|
|
int idx = info.first - 1;
|
|
while (idx > 0 && !items.at(idx).isValid())
|
|
--idx;
|
|
const QListViewItem &item = items.at(idx);
|
|
x = item.x;
|
|
y = item.y;
|
|
if (info.flow == QListView::LeftToRight)
|
|
x += (info.grid.isValid() ? info.grid.width() : item.w) + info.spacing;
|
|
else
|
|
y += (info.grid.isValid() ? info.grid.height() : item.h) + info.spacing;
|
|
}
|
|
return QPoint(x, y);
|
|
}
|
|
|
|
/*!
|
|
\internal
|
|
*/
|
|
void QIconModeViewBase::doDynamicLayout(const QListViewLayoutInfo &info)
|
|
{
|
|
const bool useItemSize = !info.grid.isValid();
|
|
const QPoint topLeft = initDynamicLayout(info);
|
|
|
|
int segStartPosition;
|
|
int segEndPosition;
|
|
int deltaFlowPosition;
|
|
int deltaSegPosition;
|
|
int deltaSegHint;
|
|
int flowPosition;
|
|
int segPosition;
|
|
|
|
if (info.flow == QListView::LeftToRight) {
|
|
segStartPosition = info.bounds.left() + info.spacing;
|
|
segEndPosition = info.bounds.right();
|
|
deltaFlowPosition = info.grid.width(); // dx
|
|
deltaSegPosition = (useItemSize ? batchSavedDeltaSeg : info.grid.height()); // dy
|
|
deltaSegHint = info.grid.height();
|
|
flowPosition = topLeft.x();
|
|
segPosition = topLeft.y();
|
|
} else { // flow == QListView::TopToBottom
|
|
segStartPosition = info.bounds.top() + info.spacing;
|
|
segEndPosition = info.bounds.bottom();
|
|
deltaFlowPosition = info.grid.height(); // dy
|
|
deltaSegPosition = (useItemSize ? batchSavedDeltaSeg : info.grid.width()); // dx
|
|
deltaSegHint = info.grid.width();
|
|
flowPosition = topLeft.y();
|
|
segPosition = topLeft.x();
|
|
}
|
|
|
|
if (moved.count() != items.count())
|
|
moved.resize(items.count());
|
|
|
|
QRect rect(QPoint(), topLeft);
|
|
QListViewItem *item = 0;
|
|
for (int row = info.first; row <= info.last; ++row) {
|
|
item = &items[row];
|
|
if (isHidden(row)) {
|
|
item->invalidate();
|
|
} else {
|
|
// if we are not using a grid, we need to find the deltas
|
|
if (useItemSize) {
|
|
if (info.flow == QListView::LeftToRight)
|
|
deltaFlowPosition = item->w + info.spacing;
|
|
else
|
|
deltaFlowPosition = item->h + info.spacing;
|
|
} else {
|
|
item->w = qMin<int>(info.grid.width(), item->w);
|
|
item->h = qMin<int>(info.grid.height(), item->h);
|
|
}
|
|
|
|
// create new segment
|
|
if (info.wrap
|
|
&& flowPosition + deltaFlowPosition > segEndPosition
|
|
&& flowPosition > segStartPosition) {
|
|
flowPosition = segStartPosition;
|
|
segPosition += deltaSegPosition;
|
|
if (useItemSize)
|
|
deltaSegPosition = 0;
|
|
}
|
|
// We must delay calculation of the seg adjustment, as this item
|
|
// may have caused a wrap to occur
|
|
if (useItemSize) {
|
|
if (info.flow == QListView::LeftToRight)
|
|
deltaSegHint = item->h + info.spacing;
|
|
else
|
|
deltaSegHint = item->w + info.spacing;
|
|
deltaSegPosition = qMax(deltaSegPosition, deltaSegHint);
|
|
}
|
|
|
|
// set the position of the item
|
|
// ### idealy we should have some sort of alignment hint for the item
|
|
// ### (normally that would be a point between the icon and the text)
|
|
if (!moved.testBit(row)) {
|
|
if (info.flow == QListView::LeftToRight) {
|
|
if (useItemSize) {
|
|
item->x = flowPosition;
|
|
item->y = segPosition;
|
|
} else { // use grid
|
|
item->x = flowPosition + ((deltaFlowPosition - item->w) / 2);
|
|
item->y = segPosition;
|
|
}
|
|
} else { // TopToBottom
|
|
if (useItemSize) {
|
|
item->y = flowPosition;
|
|
item->x = segPosition;
|
|
} else { // use grid
|
|
item->y = flowPosition + ((deltaFlowPosition - item->h) / 2);
|
|
item->x = segPosition;
|
|
}
|
|
}
|
|
}
|
|
|
|
// let the contents contain the new item
|
|
if (useItemSize)
|
|
rect |= item->rect();
|
|
else if (info.flow == QListView::LeftToRight)
|
|
rect |= QRect(flowPosition, segPosition, deltaFlowPosition, deltaSegPosition);
|
|
else // flow == TopToBottom
|
|
rect |= QRect(segPosition, flowPosition, deltaSegPosition, deltaFlowPosition);
|
|
|
|
// prepare for next item
|
|
flowPosition += deltaFlowPosition; // current position + item width + gap
|
|
}
|
|
}
|
|
batchSavedDeltaSeg = deltaSegPosition;
|
|
batchStartRow = info.last + 1;
|
|
bool done = (info.last >= rowCount() - 1);
|
|
// resize the content area
|
|
if (done || !info.bounds.contains(item->rect())) {
|
|
contentsSize = rect.size();
|
|
if (info.flow == QListView::LeftToRight)
|
|
contentsSize.rheight() += info.spacing;
|
|
else
|
|
contentsSize.rwidth() += info.spacing;
|
|
}
|
|
if (rect.size().isEmpty())
|
|
return;
|
|
// resize tree
|
|
int insertFrom = info.first;
|
|
if (done || info.first == 0) {
|
|
initBspTree(rect.size());
|
|
insertFrom = 0;
|
|
}
|
|
// insert items in tree
|
|
for (int row = insertFrom; row <= info.last; ++row)
|
|
tree.insertLeaf(items.at(row).rect(), row);
|
|
// if the new items are visble, update the viewport
|
|
QRect changedRect(topLeft, rect.bottomRight());
|
|
if (clipRect().intersects(changedRect))
|
|
viewport()->update();
|
|
}
|
|
|
|
QVector<QModelIndex> QIconModeViewBase::intersectingSet(const QRect &area) const
|
|
{
|
|
QIconModeViewBase *that = const_cast<QIconModeViewBase*>(this);
|
|
QBspTree::Data data(static_cast<void*>(that));
|
|
QVector<QModelIndex> res;
|
|
that->interSectingVector = &res;
|
|
that->tree.climbTree(area, &QIconModeViewBase::addLeaf, data);
|
|
that->interSectingVector = 0;
|
|
return res;
|
|
}
|
|
|
|
QRect QIconModeViewBase::itemsRect(const QVector<QModelIndex> &indexes) const
|
|
{
|
|
QVector<QModelIndex>::const_iterator it = indexes.begin();
|
|
QListViewItem item = indexToListViewItem(*it);
|
|
QRect rect(item.x, item.y, item.w, item.h);
|
|
for (; it != indexes.end(); ++it) {
|
|
item = indexToListViewItem(*it);
|
|
rect |= viewItemRect(item);
|
|
}
|
|
return rect;
|
|
}
|
|
|
|
int QIconModeViewBase::itemIndex(const QListViewItem &item) const
|
|
{
|
|
if (!item.isValid())
|
|
return -1;
|
|
int i = item.indexHint;
|
|
if (i < items.count()) {
|
|
if (items.at(i) == item)
|
|
return i;
|
|
} else {
|
|
i = items.count() - 1;
|
|
}
|
|
|
|
int j = i;
|
|
int c = items.count();
|
|
bool a = true;
|
|
bool b = true;
|
|
|
|
while (a || b) {
|
|
if (a) {
|
|
if (items.at(i) == item) {
|
|
items.at(i).indexHint = i;
|
|
return i;
|
|
}
|
|
a = ++i < c;
|
|
}
|
|
if (b) {
|
|
if (items.at(j) == item) {
|
|
items.at(j).indexHint = j;
|
|
return j;
|
|
}
|
|
b = --j > -1;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
void QIconModeViewBase::addLeaf(QVector<int> &leaf, const QRect &area,
|
|
uint visited, QBspTree::Data data)
|
|
{
|
|
QListViewItem *vi;
|
|
QIconModeViewBase *_this = static_cast<QIconModeViewBase *>(data.ptr);
|
|
for (int i = 0; i < leaf.count(); ++i) {
|
|
int idx = leaf.at(i);
|
|
if (idx < 0 || idx >= _this->items.count())
|
|
continue;
|
|
vi = &_this->items[idx];
|
|
Q_ASSERT(vi);
|
|
if (vi->isValid() && vi->rect().intersects(area) && vi->visited != visited) {
|
|
QModelIndex index = _this->dd->listViewItemToIndex(*vi);
|
|
Q_ASSERT(index.isValid());
|
|
_this->interSectingVector->append(index);
|
|
vi->visited = visited;
|
|
}
|
|
}
|
|
}
|
|
|
|
void QIconModeViewBase::moveItem(int index, const QPoint &dest)
|
|
{
|
|
// does not impact on the bintree itself or the contents rect
|
|
QListViewItem *item = &items[index];
|
|
QRect rect = item->rect();
|
|
|
|
// move the item without removing it from the tree
|
|
tree.removeLeaf(rect, index);
|
|
item->move(dest);
|
|
tree.insertLeaf(QRect(dest, rect.size()), index);
|
|
|
|
// resize the contents area
|
|
contentsSize = (QRect(QPoint(0, 0), contentsSize)|QRect(dest, rect.size())).size();
|
|
|
|
// mark the item as moved
|
|
if (moved.count() != items.count())
|
|
moved.resize(items.count());
|
|
moved.setBit(index, true);
|
|
}
|
|
|
|
QPoint QIconModeViewBase::snapToGrid(const QPoint &pos) const
|
|
{
|
|
int x = pos.x() - (pos.x() % gridSize().width());
|
|
int y = pos.y() - (pos.y() % gridSize().height());
|
|
return QPoint(x, y);
|
|
}
|
|
|
|
QPoint QIconModeViewBase::draggedItemsDelta() const
|
|
{
|
|
if (movement() == QListView::Snap) {
|
|
QPoint snapdelta = QPoint((offset().x() % gridSize().width()),
|
|
(offset().y() % gridSize().height()));
|
|
return snapToGrid(draggedItemsPos + snapdelta) - snapToGrid(pressedPosition()) - snapdelta;
|
|
}
|
|
return draggedItemsPos - pressedPosition();
|
|
}
|
|
|
|
QRect QIconModeViewBase::draggedItemsRect() const
|
|
{
|
|
QRect rect = itemsRect(draggedItems);
|
|
rect.translate(draggedItemsDelta());
|
|
return rect;
|
|
}
|
|
|
|
void QListViewPrivate::scrollElasticBandBy(int dx, int dy)
|
|
{
|
|
if (dx > 0) // right
|
|
elasticBand.moveRight(elasticBand.right() + dx);
|
|
else if (dx < 0) // left
|
|
elasticBand.moveLeft(elasticBand.left() - dx);
|
|
if (dy > 0) // down
|
|
elasticBand.moveBottom(elasticBand.bottom() + dy);
|
|
else if (dy < 0) // up
|
|
elasticBand.moveTop(elasticBand.top() - dy);
|
|
}
|
|
|
|
void QIconModeViewBase::clear()
|
|
{
|
|
tree.destroy();
|
|
items.clear();
|
|
moved.clear();
|
|
batchStartRow = 0;
|
|
batchSavedDeltaSeg = 0;
|
|
}
|
|
|
|
void QIconModeViewBase::updateContentsSize()
|
|
{
|
|
QRect bounding;
|
|
for (int i = 0; i < items.count(); ++i)
|
|
bounding |= items.at(i).rect();
|
|
contentsSize = bounding.size();
|
|
}
|
|
|
|
/*!
|
|
\reimp
|
|
*/
|
|
void QListView::currentChanged(const QModelIndex ¤t, const QModelIndex &previous)
|
|
{
|
|
#ifndef QT_NO_ACCESSIBILITY
|
|
if (QAccessible::isActive()) {
|
|
if (current.isValid()) {
|
|
int entry = visualIndex(current);
|
|
QAccessibleEvent event(this, QAccessible::Focus);
|
|
event.setChild(entry);
|
|
QAccessible::updateAccessibility(&event);
|
|
}
|
|
}
|
|
#endif
|
|
QAbstractItemView::currentChanged(current, previous);
|
|
}
|
|
|
|
/*!
|
|
\reimp
|
|
*/
|
|
void QListView::selectionChanged(const QItemSelection &selected,
|
|
const QItemSelection &deselected)
|
|
{
|
|
#ifndef QT_NO_ACCESSIBILITY
|
|
if (QAccessible::isActive()) {
|
|
// ### does not work properly for selection ranges.
|
|
QModelIndex sel = selected.indexes().value(0);
|
|
if (sel.isValid()) {
|
|
int entry = visualIndex(sel);
|
|
QAccessibleEvent event(this, QAccessible::Selection);
|
|
event.setChild(entry);
|
|
QAccessible::updateAccessibility(&event);
|
|
}
|
|
QModelIndex desel = deselected.indexes().value(0);
|
|
if (desel.isValid()) {
|
|
int entry = visualIndex(desel);
|
|
QAccessibleEvent event(this, QAccessible::SelectionRemove);
|
|
event.setChild(entry);
|
|
QAccessible::updateAccessibility(&event);
|
|
}
|
|
}
|
|
#endif
|
|
QAbstractItemView::selectionChanged(selected, deselected);
|
|
}
|
|
|
|
int QListView::visualIndex(const QModelIndex &index) const
|
|
{
|
|
Q_D(const QListView);
|
|
d->executePostedLayout();
|
|
QListViewItem itm = d->indexToListViewItem(index);
|
|
int visualIndex = d->commonListView->itemIndex(itm);
|
|
for (int row = 0; row <= index.row() && visualIndex >= 0; row++) {
|
|
if (d->isHidden(row))
|
|
visualIndex--;
|
|
}
|
|
return visualIndex;
|
|
}
|
|
|
|
|
|
/*!
|
|
\since 5.2
|
|
\reimp
|
|
*/
|
|
QSize QListView::viewportSizeHint() const
|
|
{
|
|
return QAbstractItemView::viewportSizeHint();
|
|
}
|
|
|
|
QT_END_NAMESPACE
|
|
|
|
#endif // QT_NO_LISTVIEW
|