mirror of
https://github.com/OPM/ResInsight.git
synced 2025-01-08 07:03:25 -06:00
74 lines
2.8 KiB
C++
74 lines
2.8 KiB
C++
/////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Copyright (C) 2017- Statoil ASA
|
|
//
|
|
// ResInsight 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.
|
|
//
|
|
// ResInsight 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 at <http://www.gnu.org/licenses/gpl.html>
|
|
// for more details.
|
|
//
|
|
/////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#include "RiuQwtPlotWheelZoomer.h"
|
|
#include "qwt_plot.h"
|
|
#include <QEvent>
|
|
#include <QWheelEvent>
|
|
|
|
#define RIU_SCROLLWHEEL_ZOOMFACTOR 1.1
|
|
#define RIU_SCROLLWHEEL_PANFACTOR 0.1
|
|
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
///
|
|
//--------------------------------------------------------------------------------------------------
|
|
RiuQwtPlotWheelZoomer::RiuQwtPlotWheelZoomer(QwtPlot* plot): QObject(plot), m_plot(plot)
|
|
{
|
|
plot->canvas()->installEventFilter(this);
|
|
}
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
///
|
|
//--------------------------------------------------------------------------------------------------
|
|
void zoomOnAxis(QwtPlot* plot, QwtPlot::Axis axis, double zoomFactor, int eventPos)
|
|
{
|
|
QwtScaleMap scaleMap = plot->canvasMap(axis);
|
|
double zoomCenter = scaleMap.invTransform(eventPos);
|
|
double newMin = zoomCenter - zoomFactor * (zoomCenter - scaleMap.s1());
|
|
double newMax = zoomCenter + zoomFactor * (-zoomCenter + scaleMap.s2());
|
|
plot->setAxisScale(axis, newMin, newMax);
|
|
}
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
///
|
|
//--------------------------------------------------------------------------------------------------
|
|
bool RiuQwtPlotWheelZoomer::eventFilter(QObject * watched, QEvent * event)
|
|
{
|
|
QWheelEvent* wheelEvent = dynamic_cast<QWheelEvent*>(event);
|
|
if ( wheelEvent )
|
|
{
|
|
double zoomFactor = 1.0/RIU_SCROLLWHEEL_ZOOMFACTOR;
|
|
if ( wheelEvent->delta() > 0 )
|
|
{
|
|
zoomFactor = RIU_SCROLLWHEEL_ZOOMFACTOR;
|
|
}
|
|
|
|
zoomOnAxis(m_plot, QwtPlot::xBottom, zoomFactor, wheelEvent->pos().x());
|
|
zoomOnAxis(m_plot, QwtPlot::xTop, zoomFactor, wheelEvent->pos().x());
|
|
zoomOnAxis(m_plot, QwtPlot::yLeft, zoomFactor, wheelEvent->pos().y());
|
|
zoomOnAxis(m_plot, QwtPlot::yRight, zoomFactor, wheelEvent->pos().y());
|
|
|
|
m_plot->replot();
|
|
emit zoomUpdated();
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|