/*
 Copyright © 2015 Hasan Yavuz Özderya

 This file is part of serialplot.

 serialplot 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.

 serialplot 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 serialplot. If not, see <http://www.gnu.org/licenses/>.
*/

#include <QRectF>

#include "scalezoomer.h"

ScaleZoomer::ScaleZoomer(QwtPlot* plot, QwtPlotZoomer* zoomer) :
 QObject(plot),
 bottomPicker(plot->axisWidget(QwtPlot::xBottom), plot->canvas()),
 leftPicker(plot->axisWidget(QwtPlot::yLeft), plot->canvas())
{
 _plot = plot;
 _zoomer = zoomer;
 connect(&bottomPicker, &ScalePicker::picked, this, &ScaleZoomer::bottomPicked);
 connect(&leftPicker, &ScalePicker::picked, this, &ScaleZoomer::leftPicked);
}

void ScaleZoomer::setPickerPen(QPen pen)
{
 bottomPicker.setPen(pen);
 leftPicker.setPen(pen);
}

void ScaleZoomer::bottomPicked(double firstPos, double lastPos)
{
 QRectF zRect;
 if (lastPos > firstPos)
 {
 zRect.setLeft(firstPos);
 zRect.setRight(lastPos);
 }
 else
 {
 zRect.setLeft(lastPos);
 zRect.setRight(firstPos);
 }

 zRect.setBottom(_plot->axisScaleDiv(QwtPlot::yLeft).lowerBound());
 zRect.setTop(_plot->axisScaleDiv(QwtPlot::yLeft).upperBound());
 _zoomer->zoom(zRect);
}

void ScaleZoomer::leftPicked(double firstPos, double lastPos)
{
 QRectF zRect;
 if (lastPos > firstPos)
 {
 zRect.setBottom(firstPos);
 zRect.setTop(lastPos);
 }
 else
 {
 zRect.setBottom(lastPos);
 zRect.setTop(firstPos);
 }

 zRect.setLeft(_plot->axisScaleDiv(QwtPlot::xBottom).lowerBound());
 zRect.setRight(_plot->axisScaleDiv(QwtPlot::xBottom).upperBound());
 _zoomer->zoom(zRect);
}