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Fix bug/typo in chartdataset
Fix bug/typo in chartdataset

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r796:4bbe1f66d4b7
r828:efd18f904bfe
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chartview.cpp
57 lines | 1.1 KiB | text/x-c | CppLexer
#include "chartview.h"
#include <QSplineSeries>
#include <QTime>
ChartView::ChartView(QWidget* parent):QChartView(parent),
m_step(1),
m_x(0),
m_y(1)
{
QTime now = QTime::currentTime();
qsrand((uint)now.msec());
setChartTitle("Three random line charts");
QObject::connect(&m_timer,SIGNAL(timeout()),this,SLOT(handleTimeout()));
m_timer.setInterval(1000);
m_series0 = new QLineSeries(this);
QPen blue(Qt::blue);
blue.setWidth(3);
m_series0->setPen(blue);
m_series1 = new QSplineSeries(this);
QPen green(Qt::red);
green.setWidth(3);
m_series1->setPen(green);
m_series0->append(m_x,m_y);
m_series1->append(m_x,m_y);
setChartTitle("Simple EKG chart");
addSeries(m_series0);
addSeries(m_series1);
axisY()->setRange(-5,5);
axisX()->setRange(-9,1);
axisX()->setTicksCount(11);
m_timer.start();
}
ChartView::~ChartView()
{
}
void ChartView::handleTimeout()
{
m_x+=m_step;
m_y = qrand() % 5 - 2.5;
m_series0->append(m_x,m_y);
m_series1->append(m_x,m_y);
if(m_x>=10)
{
m_series0->remove(m_x-10);
m_series1->remove(m_x-10);
}
scrollRight();
}