void ImageViewer::resizeEvent(QResizeEvent *e)
{
if(noPicture()) return;
if(hasUserZoom){
updateTopLeft();
updateShift();
}else{
initToFitWidget();
}
QWidget::resizeEvent(e);
}
void ImageViewer::initToFitWidget()//no change the value of rotate
{
//restore the cursor even if the image cannot load.
setCursor(QCursor(Qt::ArrowCursor));
if(noPicture()) return;
QSize pixSize(image.size());
//if image large than widget, will scale image to fit widget.
if(!(rect().size() - pixSize).isValid())//! SIZE_ADJUST !!!
pixSize.scale(rect().size() + Config::SizeAdjusted, Qt::KeepAspectRatio);
if(image.width() == 0)
scale = 1.0;
else
scale = qreal(pixSize.width()) / image.width();
scaleMin = qMin(Config::ScaleMin, scale);
updateTopLeft();
shift = Config::OriginPoint;
}
void ImageViewer::zoomIn(double factor)
{
if(noPicture()) return;
qreal scale_old = scale;
scale += factor;
scale = qMax(scaleMin, qMin(Config::ScaleMax, scale));
if(scale == scale_old)//scale no changed
return;
/*! topLeft must determined before shift,
* otherwise will impact updateShift()
*/
updateTopLeft();
shift /= scale_old;
shift *= scale;
updateShift();
hasUserZoom = true;
ToolTip::showText(mapToGlobal(rect().center()),
QString("<font size='7'><b>%1%</b></font>").arg(scale * 100, 0, 'g', 4),
true, 0.7, 800);
}
AbstractGraphicsRectItem::AbstractGraphicsRectItem(QAbstractGraphicsShapeItem *shapeItem,
QGraphicsItem *parent)
: KaptionGraphicsItem(shapeItem, parent),
m_hTL(new HandleGraphicsItem(0, shapeItem)),
m_hTR(new HandleGraphicsItem(0, shapeItem)),
m_hBL(new HandleGraphicsItem(0, shapeItem)),
m_hBR(new HandleGraphicsItem(0, shapeItem)),
m_startingPoint(0)
{
connect(m_hTL, SIGNAL(moved(QPointF)),
this, SLOT(updateTopLeft(QPointF)));
connect(m_hTR, SIGNAL(moved(QPointF)),
this, SLOT(updateTopRight(QPointF)));
connect(m_hBL, SIGNAL(moved(QPointF)),
this, SLOT(updateBottomLeft(QPointF)));
connect(m_hBR, SIGNAL(moved(QPointF)),
this, SLOT(updateBottomRight(QPointF)));
m_handles << m_hTL << m_hTR << m_hBL << m_hBR;
hideHandles();
dropShadowEffect()->setOffset(dropShadowEffect()->offset() - QPoint(5, 5));
}
