Fixed Issue #3.

--HG--
branch : develop
This commit is contained in:
dismine 2013-10-14 11:40:01 +03:00
parent 1e70aea0db
commit 244756cb06
2 changed files with 40 additions and 28 deletions

View File

@ -23,30 +23,50 @@
#include <QApplication>
#include <QWheelEvent>
#include <QScrollBar>
#include <QTimeLine>
VMainGraphicsView::VMainGraphicsView(QWidget *parent) :
QGraphicsView(parent){
QGraphicsView(parent), _numScheduledScalings(0){
QGraphicsView::setResizeAnchor(QGraphicsView::AnchorUnderMouse);
setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
}
void VMainGraphicsView::wheelEvent(QWheelEvent *event){
// If you press CTRL this code will execute
int numDegrees = event->delta() / 8;
int numSteps = numDegrees / 15; // see QWheelEvent documentation
_numScheduledScalings += numSteps;
if (_numScheduledScalings * numSteps < 0){ // if user moved the wheel in another direction, we reset
_numScheduledScalings = numSteps; // previously scheduled scalings
}
QTimeLine *anim = new QTimeLine(350, this);
anim->setUpdateInterval(20);
connect(anim, &QTimeLine::valueChanged, this, &VMainGraphicsView::scalingTime);
connect(anim, &QTimeLine::finished, this, &VMainGraphicsView::animFinished);
anim->start();
}
void VMainGraphicsView::scalingTime(qreal x){
Q_UNUSED(x);
qreal factor = 1.0 + qreal(_numScheduledScalings) / 300.0;
if (QApplication::keyboardModifiers() == Qt::ControlModifier){
// Если нажата клавиша CTRL этот код выполнится
if ((event->delta())>0){
ZoomIn();
} else if ((event->delta())<0){
ZoomOut();
}
scale(factor, factor);
} else {
verticalScrollBar()->setValue(verticalScrollBar()->value() - event->delta());
if(_numScheduledScalings < 0){
verticalScrollBar()->setValue(qRound(verticalScrollBar()->value() + factor*3.5));
} else {
verticalScrollBar()->setValue(qRound(verticalScrollBar()->value() - factor*3.5));
}
}
}
void VMainGraphicsView::ZoomIn(){
scale(1.1,1.1);
}
void VMainGraphicsView::ZoomOut(){
scale(1/1.1,1/1.1);
void VMainGraphicsView::animFinished(){
if (_numScheduledScalings > 0){
_numScheduledScalings--;
} else {
_numScheduledScalings++;
}
sender()->~QObject();
}

View File

@ -24,30 +24,22 @@
#include <QGraphicsView>
class VMainGraphicsView : public QGraphicsView
{
class VMainGraphicsView : public QGraphicsView{
Q_OBJECT
public:
explicit VMainGraphicsView(QWidget *parent = 0);
signals:
protected:
/**
* @brief wheelEvent обробник повороту колеса мишки.
* @param event передається подія.
*/
void wheelEvent ( QWheelEvent * event );
void wheelEvent ( QWheelEvent * event );
public slots:
/**
* @brief ZoomIn збільшує масштаб листа.
*/
void ZoomIn();
/**
* @brief ZoomOut зменшує масштаб листа.
*/
void ZoomOut();
void scalingTime(qreal x);
void animFinished();
private:
qint32 _numScheduledScalings;
};
#endif // VMAINGRAPHICSVIEW_H