plasma-framework/declarativeimports/qtextracomponents/qimageitem.cpp
2012-08-14 20:02:58 +02:00

157 lines
3.7 KiB
C++

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