chartview.cpp
57 lines
| 1.2 KiB
| text/x-c
|
CppLexer
|
r246 | #include "chartview.h" | ||
#include <qlinechartseries.h> | ||||
#include <QTime> | ||||
ChartView::ChartView(QWidget* parent):QChartView(parent), | ||||
m_index(0) | ||||
{ | ||||
QObject::connect(&m_timer,SIGNAL(timeout()),this,SLOT(handleTimeout())); | ||||
m_timer.setInterval(3000); | ||||
QTime now = QTime::currentTime(); | ||||
qsrand((uint)now.msec()); | ||||
QLineChartSeries* series0 = new QLineChartSeries(); | ||||
QPen blue(Qt::blue); | ||||
blue.setWidth(3); | ||||
series0->setPen(blue); | ||||
QLineChartSeries* series1 = new QLineChartSeries(); | ||||
QPen red(Qt::red); | ||||
red.setWidth(3); | ||||
series1->setPen(red); | ||||
QLineChartSeries* series2 = new QLineChartSeries(); | ||||
QPen green(Qt::green); | ||||
green.setWidth(3); | ||||
series2->setPen(green); | ||||
int numPoints = 10; | ||||
for (int x = 0; x <= numPoints; ++x) { | ||||
series0->add(x, qrand() % 100); | ||||
series1->add(x, qrand() % 100); | ||||
series2->add(x, qrand() % 100); | ||||
} | ||||
addSeries(series0); | ||||
m_series<<series0; | ||||
m_series<<series1; | ||||
m_series<<series2; | ||||
m_timer.start(); | ||||
} | ||||
ChartView::~ChartView() | ||||
{ | ||||
} | ||||
void ChartView::handleTimeout() | ||||
{ | ||||
if(m_series.size()==0) return; | ||||
removeSeries(m_series.at(m_index)); | ||||
m_index++; | ||||
m_index=m_index%m_series.size(); | ||||
addSeries(m_series.at(m_index)); | ||||
} | ||||