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all the tiling option of Image

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This commit is contained in:
Marco Martin 2011-11-14 16:48:07 +01:00
parent b5f6d6ff33
commit 5880e5315c
2 changed files with 76 additions and 7 deletions
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67
declarativeimports/qtextracomponents/qimageitem.cpp
View File

@ -24,7 +24,8 @@
QImageItem::QImageItem(QDeclarativeItem *parent)
: QDeclarativeItem(parent),
m_smooth(false)
m_smooth(false),
m_fillMode(QImageItem::Stretch)
{
setFlag(QGraphicsItem::ItemHasNoContents, false);
}
@ -71,6 +72,22 @@ 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);
@ -79,15 +96,51 @@ void QImageItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option
if (m_image.isNull()) {
return;
}
//do without painter save, faster and the support can be compiled out
const bool wasAntiAlias = painter->testRenderHint(QPainter::Antialiasing);
const bool wasSmoothTransform = painter->testRenderHint(QPainter::SmoothPixmapTransform);
painter->save();
painter->setRenderHint(QPainter::Antialiasing, m_smooth);
painter->setRenderHint(QPainter::SmoothPixmapTransform, m_smooth);
painter->drawImage(boundingRect(), m_image, m_image.rect());
painter->setRenderHint(QPainter::Antialiasing, wasAntiAlias);
painter->setRenderHint(QPainter::SmoothPixmapTransform, wasSmoothTransform);
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();
}

16
declarativeimports/qtextracomponents/qimageitem.h
View File

@ -30,8 +30,19 @@ class QImageItem : public QDeclarativeItem
Q_PROPERTY(bool smooth READ smooth WRITE setSmooth)
Q_PROPERTY(int nativeWidth READ nativeWidth NOTIFY nativeWidthChanged)
Q_PROPERTY(int nativeHeight READ nativeHeight NOTIFY nativeHeightChanged)
Q_PROPERTY(FillMode fillMode READ fillMode WRITE setFillMode NOTIFY fillModeChanged)
Q_ENUMS(FillMode)
public:
enum FillMode {
Stretch, // the image is scaled to fit
PreserveAspectFit, // the image is scaled uniformly to fit without cropping
PreserveAspectCrop, // the image is scaled uniformly to fill, cropping if necessary
Tile, // the image is duplicated horizontally and vertically
TileVertically, // the image is stretched horizontally and tiled vertically
TileHorizontally //the image is stretched vertically and tiled horizontally
};
QImageItem(QDeclarativeItem *parent=0);
~QImageItem();
@ -44,15 +55,20 @@ public:
int nativeWidth() const;
int nativeHeight() const;
FillMode fillMode() const;
void setFillMode(FillMode mode);
void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
Q_SIGNALS:
void nativeWidthChanged();
void nativeHeightChanged();
void fillModeChanged();
private:
QImage m_image;
bool m_smooth;
FillMode m_fillMode;
};
#endif