157 lines
3.7 KiB
C++
157 lines
3.7 KiB
C++
/*
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* Copyright 2011 Marco Martin <mart@kde.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Library General Public License as
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* published by the Free Software Foundation; either version 2, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "qimageitem.h"
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#include <QPainter>
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QImageItem::QImageItem(QDeclarativeItem *parent)
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: QDeclarativeItem(parent),
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m_smooth(false),
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m_fillMode(QImageItem::Stretch)
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{
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setFlag(QGraphicsItem::ItemHasNoContents, false);
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}
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QImageItem::~QImageItem()
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{
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}
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void QImageItem::setImage(const QImage &image)
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{
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bool oldImageNull = m_image.isNull();
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m_image = image;
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update();
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emit nativeWidthChanged();
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emit nativeHeightChanged();
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emit imageChanged();
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if (oldImageNull != m_image.isNull()) {
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emit nullChanged();
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}
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}
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QImage QImageItem::image() const
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{
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return m_image;
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}
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void QImageItem::setSmooth(const bool smooth)
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{
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if (smooth == m_smooth) {
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return;
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}
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m_smooth = smooth;
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update();
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}
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bool QImageItem::smooth() const
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{
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return m_smooth;
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}
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int QImageItem::nativeWidth() const
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{
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return m_image.size().width();
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}
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int QImageItem::nativeHeight() const
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{
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return m_image.size().height();
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}
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QImageItem::FillMode QImageItem::fillMode() const
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{
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return m_fillMode;
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}
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void QImageItem::setFillMode(QImageItem::FillMode mode)
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{
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if (mode == m_fillMode) {
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return;
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}
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m_fillMode = mode;
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update();
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emit fillModeChanged();
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}
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void QImageItem::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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if (m_image.isNull()) {
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return;
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}
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painter->save();
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painter->setRenderHint(QPainter::Antialiasing, m_smooth);
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painter->setRenderHint(QPainter::SmoothPixmapTransform, m_smooth);
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QRect destRect;
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switch (m_fillMode) {
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case PreserveAspectFit: {
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QSize scaled = m_image.size();
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scaled.scale(boundingRect().size().toSize(), Qt::KeepAspectRatio);
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destRect = QRect(QPoint(0, 0), scaled);
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break;
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}
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case PreserveAspectCrop: {
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painter->setClipRect(boundingRect(), Qt::IntersectClip);
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QSize scaled = m_image.size();
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scaled.scale(boundingRect().size().toSize(), Qt::KeepAspectRatioByExpanding);
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destRect = QRect(QPoint(0, 0), scaled);
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break;
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}
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case TileVertically: {
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painter->scale(width()/(qreal)m_image.width(), 1);
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destRect = boundingRect().toRect();
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destRect.setWidth(destRect.width() / (width()/(qreal)m_image.width()));
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break;
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}
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case TileHorizontally: {
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painter->scale(1, height()/(qreal)m_image.height());
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destRect = boundingRect().toRect();
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destRect.setHeight(destRect.height() / (height()/(qreal)m_image.height()));
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break;
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}
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case Stretch:
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case Tile:
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default:
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destRect = boundingRect().toRect();
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}
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if (m_fillMode >= Tile) {
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painter->drawTiledPixmap(destRect, QPixmap::fromImage(m_image));
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} else {
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painter->drawImage(destRect, m_image, m_image.rect());
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}
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painter->restore();
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}
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bool QImageItem::isNull() const
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{
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return m_image.isNull();
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}
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#include "qimageitem.moc"
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