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#include "qchartwidget.h"
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#include "qchartseries.h"
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#include <QGraphicsView>
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#include <QGraphicsScene>
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#include <QResizeEvent>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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QChartWidget::QChartWidget(QWidget *parent) :
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QGraphicsView(parent),
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m_rubberBand(QRubberBand::Rectangle, this),
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m_originX(0)
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{
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setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
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m_scene = new QGraphicsScene();
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setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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setScene(m_scene);
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m_chart = new QChart();
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// TODO: currently setting the margins explicitly is required, if you wish to have axis labels visible
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m_chart->setMargin(25);
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m_scene->addItem(m_chart);
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m_rubberBand.setEnabled(true); // TODO: should zoom be enabled by default?
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show();
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}
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QChartWidget::~QChartWidget()
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{
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}
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void QChartWidget::resizeEvent(QResizeEvent *event)
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{
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m_scene->setSceneRect(0,0,size().width(),size().height());
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m_chart->setSize(size());
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QWidget::resizeEvent(event);
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}
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QSize QChartWidget::sizeHint() const
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{
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// TODO: calculate size hint based on contents?
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return QSize(100, 100);
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}
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void QChartWidget::mousePressEvent(QMouseEvent *event)
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{
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if(m_rubberBand.isEnabled() && event->button() == Qt::LeftButton) {
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int margin = m_chart->margin();
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QRect rect(margin, margin, width() - 2 * margin, height() - 2 * margin);
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if (rect.contains(event->pos())) {
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m_originX = event->pos().x();
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m_rubberBand.setGeometry(QRect(m_originX, 0, 0, height()));
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m_rubberBand.show();
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event->accept();
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}
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}
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}
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void QChartWidget::mouseMoveEvent(QMouseEvent *event)
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{
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if(m_rubberBand.isVisible())
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m_rubberBand.setGeometry(QRect(m_originX, 0,
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event->pos().x() - m_originX, height()).normalized());
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}
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void QChartWidget::mouseReleaseEvent(QMouseEvent *event)
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{
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if (event->button() == Qt::LeftButton && m_rubberBand.isVisible()) {
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m_rubberBand.hide();
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QRect rect = m_rubberBand.geometry();
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m_chart->zoomInToRect(rect);
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event->accept();
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}
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if(event->button()==Qt::RightButton)
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m_chart->zoomReset();
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}
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void QChartWidget::addSeries(QChartSeries* series)
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{
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m_chart->addSeries(series);
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}
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QChartSeries* QChartWidget::createSeries(QChartSeries::QChartSeriesType type)
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{
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return m_chart->createSeries(type);
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}
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void QChartWidget::setTheme(QChart::ChartThemeId theme)
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{
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m_chart->setTheme(theme);
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}
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void QChartWidget::setZoomEnabled(bool enabled)
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{
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m_rubberBand.setEnabled(enabled);
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}
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#include "moc_qchartwidget.cpp"
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QTCOMMERCIALCHART_END_NAMESPACE
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