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/*
* Copyright (C) 2017-2018 Olzhas Rakhimov
*
* This program 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.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
/// @file
#include "zoomableview.h"
#include <QMatrix>
namespace scram::gui {
void ZoomableView::setZoom(int level)
{
if (level == m_zoom)
return;
if (level < m_minZoomLevel)
level = m_minZoomLevel;
double scaleValue = 0.01 * level;
QMatrix matrix;
matrix.scale(scaleValue, scaleValue);
this->setMatrix(matrix);
m_zoom = level;
emit zoomChanged(level);
}
void ZoomableView::zoomBestFit()
{
QSize viewSize = size();
QSize sceneSize = scene()->sceneRect().size().toSize();
double ratioHeight =
static_cast<double>(viewSize.height()) / sceneSize.height();
double ratioWidth =
static_cast<double>(viewSize.width()) / sceneSize.width();
setZoom(std::min(ratioHeight, ratioWidth) * 100);
}
void ZoomableView::wheelEvent(QWheelEvent *event)
{
if (event->modifiers() & Qt::ControlModifier) {
if (event->delta() > 0)
zoomIn(5);
else
zoomOut(5);
event->accept();
} else {
QGraphicsView::wheelEvent(event);
}
}
} // namespace scram::gui
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