150 lines
4.1 KiB
C++
150 lines
4.1 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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#include <QtGui>
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#include <QSvgRenderer>
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#include <QGraphicsEffect>
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#include "iconitem.h"
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IconItem::IconItem(const QString &filename, QGraphicsItem *parent)
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: GvbWidget(parent)
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, m_filename(filename)
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, m_rotation(0.0)
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, m_opacityEffect(0)
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, m_smoothTransformation(false)
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{
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setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
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setContentsMargins(0,0,0,0);
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setPreferredSize(58,58);
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}
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IconItem::~IconItem()
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{
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}
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void IconItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
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{
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Q_UNUSED(option);
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Q_UNUSED(widget);
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reload();
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const QPointF c = boundingRect().center();
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painter->translate(c.x(), c.y());
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painter->rotate(m_rotation);
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painter->translate(-c.x(), -c.y());
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if (m_smoothTransformation)
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painter->setRenderHints(QPainter::SmoothPixmapTransform);
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painter->drawPixmap(0,0, m_pixmap);
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}
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QSizeF IconItem::sizeHint(Qt::SizeHint which,
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const QSizeF &constraint) const
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{
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switch (which)
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{
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case Qt::MinimumSize:
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case Qt::PreferredSize:
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case Qt::MaximumSize:
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return m_pixmap.size();
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default:
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return GvbWidget::sizeHint(which, constraint);
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}
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}
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void IconItem::reload()
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{
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const QSize iconSize = size().toSize();
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if (iconSize.width() == 0 || iconSize.height() == 0)
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return;
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const QString key = m_filename+QString::number(iconSize.width())+QString::number(iconSize.height());
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if (QPixmapCache::find(key, m_pixmap))
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return;
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if (m_filename.endsWith(".svg", Qt::CaseInsensitive))
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{
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m_pixmap = QPixmap(iconSize);
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m_pixmap.fill(Qt::transparent);
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QSvgRenderer doc(m_filename);
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QPainter painter(&m_pixmap);
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painter.setViewport(0, 0, iconSize.width(), iconSize.height());
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doc.render(&painter);
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}
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else
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{
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m_pixmap = QPixmap(m_filename).scaled(iconSize);
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}
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QPixmapCache::insert(key, m_pixmap);
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updateGeometry();
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}
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QString IconItem::fileName() const
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{
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return m_filename;
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}
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void IconItem::setFileName(const QString &filename)
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{
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if( m_filename != filename) {
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m_filename = filename;
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reload();
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}
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}
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void IconItem::setOpacityEffectEnabled(const bool enable)
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{
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if (!m_opacityEffect)
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{
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QRadialGradient gradient(0.5, 0.5, 1.0);
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gradient.setCoordinateMode(QGradient::ObjectBoundingMode);
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gradient.setColorAt(0.0, QColor(0,0,0, 255));
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gradient.setColorAt(0.46, QColor(0,0,0, 255));
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gradient.setColorAt(0.62, QColor(0,0,0, 0));
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m_opacityEffect = new QGraphicsOpacityEffect;
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m_opacityEffect->setOpacityMask(gradient);
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m_opacityEffect->setOpacity(1.0);
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this->setGraphicsEffect(m_opacityEffect);
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}
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m_opacityEffect->setEnabled(enable);
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}
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bool IconItem::isOpacityEffectEnabled() const
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{
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if (m_opacityEffect)
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return m_opacityEffect->isEnabled();
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return false;
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}
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