valentina_old/widgets/vmaingraphicsview.cpp

53 lines
1.8 KiB
C++

/****************************************************************************
**
** Copyright (C) 2013 Valentina project All Rights Reserved.
**
** This file is part of Valentina.
**
** Tox is free software: you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation, either version 3 of the License, or
** (at your option) any later version.
**
** Tox 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 General Public License
** along with Valentina. If not, see <http://www.gnu.org/licenses/>.
**
****************************************************************************/
#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);
}