valentina_old/widgets/vmaingraphicsview.cpp

32 lines
900 B
C++

#include "vmaingraphicsview.h"
#include <QApplication>
#include <QWheelEvent>
#include <QScrollBar>
VMainGraphicsView::VMainGraphicsView(QWidget *parent) :
QGraphicsView(parent){
QGraphicsView::setResizeAnchor(QGraphicsView::AnchorUnderMouse);
setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
}
void VMainGraphicsView::wheelEvent(QWheelEvent *event){
if (QApplication::keyboardModifiers() == Qt::ControlModifier){
// Если нажата клавиша CTRL этот код выполнится
if ((event->delta())>0){
ZoomIn();
} else if ((event->delta())<0){
ZoomOut();
}
} else {
verticalScrollBar()->setValue(verticalScrollBar()->value() - event->delta());
}
}
void VMainGraphicsView::ZoomIn(){
scale(1.1,1.1);
}
void VMainGraphicsView::ZoomOut(){
scale(1/1.1,1/1.1);
}