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/***************************************************************************
** **
** QCustomPlot, an easy to use, modern plotting widget for Qt **
** Copyright (C) 2011-2015 Emanuel Eichhammer **
** **
** 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/. **
** **
****************************************************************************
** Author: Emanuel Eichhammer **
** Website/Contact: http://www.qcustomplot.com/ **
** Date: 25.04.15 **
** Version: 1.3.1 **
****************************************************************************/
#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
setupPlot();
// configure scroll bars:
// Since scroll bars only support integer values, we'll set a high default range of -500..500 and
// divide scroll bar position values by 100 to provide a scroll range -5..5 in floating point
// axis coordinates. if you want to dynamically grow the range accessible with the scroll bar,
// just increase the the minimum/maximum values of the scroll bars as needed.
ui->horizontalScrollBar->setRange(-500, 500);
ui->verticalScrollBar->setRange(-500, 500);
// create connection between axes and scroll bars:
connect(ui->horizontalScrollBar, SIGNAL(valueChanged(int)), this, SLOT(horzScrollBarChanged(int)));
connect(ui->verticalScrollBar, SIGNAL(valueChanged(int)), this, SLOT(vertScrollBarChanged(int)));
connect(ui->plot->xAxis, SIGNAL(rangeChanged(QCPRange)), this, SLOT(xAxisChanged(QCPRange)));
connect(ui->plot->yAxis, SIGNAL(rangeChanged(QCPRange)), this, SLOT(yAxisChanged(QCPRange)));
// initialize axis range (and scroll bar positions via signals we just connected):
ui->plot->xAxis->setRange(0, 6, Qt::AlignCenter);
ui->plot->yAxis->setRange(0, 10, Qt::AlignCenter);
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::setupPlot()
{
// The following plot setup is mostly taken from the plot demos:
ui->plot->addGraph();
ui->plot->graph()->setPen(QPen(Qt::blue));
ui->plot->graph()->setBrush(QBrush(QColor(0, 0, 255, 20)));
ui->plot->addGraph();
ui->plot->graph()->setPen(QPen(Qt::red));
QVector<double> x(500), y0(500), y1(500);
for (int i=0; i<500; ++i)
{
x[i] = (i/499.0-0.5)*10;
y0[i] = qExp(-x[i]*x[i]*0.25)*qSin(x[i]*5)*5;
y1[i] = qExp(-x[i]*x[i]*0.25)*5;
}
ui->plot->graph(0)->setData(x, y0);
ui->plot->graph(1)->setData(x, y1);
ui->plot->axisRect()->setupFullAxesBox(true);
ui->plot->setInteractions(QCP::iRangeDrag | QCP::iRangeZoom);
}
void MainWindow::horzScrollBarChanged(int value)
{
if (qAbs(ui->plot->xAxis->range().center()-value/100.0) > 0.01) // if user is dragging plot, we don't want to replot twice
{
ui->plot->xAxis->setRange(value/100.0, ui->plot->xAxis->range().size(), Qt::AlignCenter);
ui->plot->replot();
}
}
void MainWindow::vertScrollBarChanged(int value)
{
if (qAbs(ui->plot->yAxis->range().center()+value/100.0) > 0.01) // if user is dragging plot, we don't want to replot twice
{
ui->plot->yAxis->setRange(-value/100.0, ui->plot->yAxis->range().size(), Qt::AlignCenter);
ui->plot->replot();
}
}
void MainWindow::xAxisChanged(QCPRange range)
{
ui->horizontalScrollBar->setValue(qRound(range.center()*100.0)); // adjust position of scroll bar slider
ui->horizontalScrollBar->setPageStep(qRound(range.size()*100.0)); // adjust size of scroll bar slider
}
void MainWindow::yAxisChanged(QCPRange range)
{
ui->verticalScrollBar->setValue(qRound(-range.center()*100.0)); // adjust position of scroll bar slider
ui->verticalScrollBar->setPageStep(qRound(range.size()*100.0)); // adjust size of scroll bar slider
}
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