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#include "chartview.h"
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#include <QLineSeries>
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#include <QScatterSeries>
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#include <QSplineSeries>
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#include <QAreaSeries>
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#include <QTime>
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ChartView::ChartView(QWidget* parent):QChartView(parent),
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m_index(0)
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{
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setChartTitle("Charts presenter");
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QObject::connect(&m_timer,SIGNAL(timeout()),this,SLOT(handleTimeout()));
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m_timer.setInterval(3000);
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//![1]
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QLineSeries* series0 = new QLineSeries(this);
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QPen blue(Qt::blue);
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blue.setWidth(3);
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series0->setPen(blue);
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QScatterSeries* series1 = new QScatterSeries(this);
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QPen red(Qt::red);
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red.setWidth(3);
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series1->setPen(red);
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series1->setBrush(Qt::white);
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QSplineSeries* series2 = new QSplineSeries(this);
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QPen green(Qt::green);
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green.setWidth(3);
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series2->setPen(green);
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QAreaSeries* series3 = new QAreaSeries(series0);
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QPen yellow(Qt::black);
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yellow.setWidth(3);
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series3->setPen(yellow);
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series3->setBrush(Qt::yellow);
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//![1]
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//![2]
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int numPoints = 10;
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for (int x = 0; x <= numPoints; ++x) {
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qreal y = qrand() % 100;
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series0->add(x,y);
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series1->add(x,y);
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series2->add(x,y);
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}
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//![2]
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//![3]
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m_series<<series0;
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m_titles<<chartTitle()+": LineChart";
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m_series<<series1;
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m_titles<<chartTitle()+": ScatterChart";
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m_series<<series2;
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m_titles<<chartTitle()+": SplineChart";
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m_series<<series3;
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m_titles<<chartTitle()+": AreaChart";
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//![3]
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addSeries(series0);
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setChartTitle(m_titles.at(0));
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//![4]
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foreach (QSeries* series, m_series) {
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QObject::connect(series,SIGNAL(clicked(const QPointF&)),this,SLOT(handlePointClicked(const QPointF&)));
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}
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//![4]
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m_timer.start();
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}
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ChartView::~ChartView()
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{
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if(m_series.size()==0) return;
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removeSeries(m_series.at(m_index));
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qDeleteAll(m_series);
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}
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//![5]
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void ChartView::handleTimeout()
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{
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if(m_series.size()==0) return;
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removeSeries(m_series.at(m_index));
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m_index++;
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m_index=m_index%m_series.size();
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addSeries(m_series.at(m_index));
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setChartTitle(m_titles.at(m_index));
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}
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//![5]
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//![6]
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void ChartView::handlePointClicked(const QPointF& point)
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{
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setChartTitle(m_titles.at(m_index) + QString(" x: %1 y: %2").arg(point.x()).arg(point.y()));
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}
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//![6]
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