97 lines
3.5 KiB
C++
97 lines
3.5 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:GPL-EXCEPT$
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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 The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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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 as published by the Free Software
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** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef ABSTRACTITEMCONTAINER_H
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#define ABSTRACTITEMCONTAINER_H
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#include <QModelIndex>
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#include "gvbwidget.h"
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class QGraphicsWidget;
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class AbstractItemView;
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class AbstractViewItem;
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class AbstractItemContainer : public GvbWidget
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{
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Q_OBJECT
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public:
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AbstractItemContainer(int bufferSize, QGraphicsWidget *parent=0);
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virtual ~AbstractItemContainer();
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virtual void addItem(const QModelIndex &index);
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virtual void removeItem(const QModelIndex &index);
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virtual void setItemView(AbstractItemView *view);
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virtual void setItemPrototype(AbstractViewItem *ptype);
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virtual void reset();
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virtual int itemCount() const;
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virtual AbstractViewItem* itemAt(const int row) const;
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AbstractViewItem* findItemByIndex(const QModelIndex &index) const;
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AbstractViewItem *prototype();
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AbstractViewItem *firstItem();
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void updateContent();
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void themeChange();
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int bufferSize() const;
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virtual void setTwoColumns(const bool enabled);
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bool twoColumns();
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void setSubtreeCacheEnabled(const bool enabled);
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virtual void setListItemCaching(const bool enabled, const int index) = 0;
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protected:
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virtual void adjustVisibleContainerSize(const QSizeF &size) = 0;
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virtual void addItemToVisibleLayout(int index, AbstractViewItem *item) = 0;
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virtual void removeItemFromVisibleLayout(AbstractViewItem *item) = 0;
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virtual bool event(QEvent *e);
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virtual bool eventFilter(QObject *obj, QEvent *event);
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virtual QVariant itemChange(GraphicsItemChange change, const QVariant &value);
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virtual int maxItemCountInItemBuffer() const;
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bool itemVisibleInView(AbstractViewItem* item, const QRectF &viewRect, bool fullyVisible = true) const;
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protected:
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void updateItemBuffer();
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void findFirstAndLastVisibleBufferIndex(int &firstVisibleBufferIndex,
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int &lastVisibleBufferIndex,
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const QRectF &viewRect,
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bool fullyVisible) const;
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QList<AbstractViewItem*> m_items;
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AbstractItemView *m_itemView;
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AbstractViewItem *m_prototype;
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int m_bufferSize;
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private:
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void insertItem(int pos, const QModelIndex &index);
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bool m_twoColumns;
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Q_DISABLE_COPY(AbstractItemContainer)
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};
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#endif // ABSTRACTITEMCONTAINER_H
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