mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-11-26 17:58:43 -05:00
49 lines
2.2 KiB
C
49 lines
2.2 KiB
C
|
///////////////////////////////////////////////////////////////////////////////////
|
||
|
|
// Copyright (C) 2021 Jon Beniston, M7RCE //
|
||
|
|
// //
|
||
|
|
// 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 as 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 V3 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/>. //
|
||
|
|
///////////////////////////////////////////////////////////////////////////////////
|
||
|
|
|
||
|
|
#ifndef SDRGUI_GUI_GRAPHICSVIEWZOOM_H
|
||
|
|
#define SDRGUI_GUI_GRAPHICSVIEWZOOM_H
|
||
|
|
|
||
|
|
#include <QObject>
|
||
|
|
#include <QGraphicsView>
|
||
|
|
|
||
|
|
#include "export.h"
|
||
|
|
|
||
|
|
// GraphicsView that allows scroll wheel to be used for zoom
|
||
|
|
// https://stackoverflow.com/questions/19113532/qgraphicsview-zooming-in-and-out-under-mouse-position-using-mouse-wheel
|
||
|
|
class SDRGUI_API GraphicsViewZoom : public QObject {
|
||
|
|
Q_OBJECT
|
||
|
|
|
||
|
|
public:
|
||
|
|
GraphicsViewZoom(QGraphicsView* view);
|
||
|
|
void gentleZoom(double factor);
|
||
|
|
void setModifiers(Qt::KeyboardModifiers modifiers);
|
||
|
|
void setZoomFactorBase(double value);
|
||
|
|
|
||
|
|
private:
|
||
|
|
QGraphicsView* m_view;
|
||
|
|
Qt::KeyboardModifiers m_modifiers;
|
||
|
|
double m_zoomFactorBase;
|
||
|
|
QPointF m_targetScenePos, m_targetViewportPos;
|
||
|
|
bool eventFilter(QObject* object, QEvent* event);
|
||
|
|
|
||
|
|
signals:
|
||
|
|
void zoomed();
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif // SDRGUI_GUI_GRAPHICSVIEWZOOM_H
|