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#include "qchartview.h"
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#include "qchart.h"
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#include "qchartaxis.h"
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#include <QGraphicsView>
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#include <QGraphicsScene>
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#include <QRubberBand>
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#include <QResizeEvent>
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#include <QDebug>
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/*!
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\class QChartView
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\brief Chart widget
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QChartView is a standalone widget that can display charts. It does not require QGraphicsScene to work. It manages the graphical
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representation of different types of QChartSeries and other chart related objects like
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QChartAxis and QChartLegend. If you want to display a chart in your existing QGraphicsScene, you can use the QChart class instead.
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\sa QChart
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*/
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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QChartView::QChartView(QWidget *parent) :
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QGraphicsView(parent),
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m_scene(new QGraphicsScene(this)),
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m_chart(new QChart()),
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m_rubberBand(0),
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m_verticalRubberBand(false),
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m_horizonalRubberBand(false)
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{
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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->setMargin(50);
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m_scene->addItem(m_chart);
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setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
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}
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/*!
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Destroys the object and it's children, like QChartSeries and QChartAxis object added to it.
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*/
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QChartView::~QChartView()
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{
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}
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void QChartView::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->resize(size());
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QWidget::resizeEvent(event);
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}
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/*!
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Adds the series and optional y axis onto the chart and takes the ownership of the objects.
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If auto scaling is enabled, re-scales the axes the series is bound to (both the x axis and
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the y axis).
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\sa removeSeries, removeAllSeries
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*/
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void QChartView::addSeries(QChartSeries* series,QChartAxis *axisY)
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{
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m_chart->addSeries(series,axisY);
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}
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/*!
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Removes the QChartSeries specified in a perameter from the QChartView.
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It releses its ownership of the specified QChartSeries object.
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It does not delete the pointed QChartSeries data object
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\sa removeSeries(), removeAllSeries()
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*/
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void QChartView::removeSeries(QChartSeries* series)
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{
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m_chart->removeSeries(series);
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}
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/*!
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Removes all the QChartSeries that have been added to the QChartView
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It also deletes the pointed QChartSeries data objects
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\sa addSeries(), removeSeries()
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*/
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void QChartView::removeAllSeries()
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{
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m_chart->removeAllSeries();
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}
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void QChartView::zoomIn()
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{
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m_chart->zoomIn();
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}
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void QChartView::zoomIn(const QRect& rect)
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{
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m_chart->zoomIn(rect);
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}
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void QChartView::zoomOut()
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{
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m_chart->zoomOut();
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}
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/*!
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Returns the chart margin, which is the distance between the widget edge and the part of the chart where the actual data can be displayed.
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*/
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int QChartView::margin() const
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{
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return m_chart->margin();
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}
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/*!
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Sets the chart \a tile. A description text that is rendered above the chart.
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*/
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void QChartView::setChartTitle(const QString& title)
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{
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m_chart->setChartTitle(title);
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}
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/*!
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Sets the \a font that is used for rendering the description text that is rendered above the chart.
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*/
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void QChartView::setChartTitleFont(const QFont& font)
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{
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m_chart->setChartTitleFont(font);
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}
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/*!
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Sets the \a brush that is used for painting the background of the chart area of the QChartView widget.
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*/
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void QChartView::setChartBackgroundBrush(const QBrush& brush)
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{
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m_chart->setChartBackgroundBrush(brush);
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}
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/*!
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Sets the \a pen that is used for painting the background of the chart area of the QChartView widget.
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*/
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void QChartView::setChartBackgroundPen(const QPen& pen)
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{
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m_chart->setChartBackgroundPen(pen);
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}
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void QChartView::setRubberBandPolicy(const RubberBandPolicy policy)
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{
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switch(policy) {
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case VerticalRubberBand:
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m_verticalRubberBand = true;
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m_horizonalRubberBand = false;
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break;
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case HorizonalRubberBand:
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m_verticalRubberBand = false;
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m_horizonalRubberBand = true;
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break;
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case RectangleRubberBand:
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m_verticalRubberBand = true;
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m_horizonalRubberBand = true;
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break;
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case NoRubberBand:
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default:
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delete m_rubberBand;
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m_rubberBand=0;
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m_horizonalRubberBand = false;
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m_verticalRubberBand = false;
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return;
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}
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if(!m_rubberBand) {
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m_rubberBand = new QRubberBand(QRubberBand::Rectangle, this);
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m_rubberBand->setEnabled(true);
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}
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}
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QChartView::RubberBandPolicy QChartView::rubberBandPolicy() const
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{
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if(m_horizonalRubberBand && m_verticalRubberBand) return RectangleRubberBand;
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if(m_horizonalRubberBand) return HorizonalRubberBand;
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if(m_verticalRubberBand) return VerticalRubberBand;
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return NoRubberBand;
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}
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void QChartView::mousePressEvent(QMouseEvent *event)
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{
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if(m_rubberBand && 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_rubberBandOrigin = event->pos();
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m_rubberBand->setGeometry(QRect(m_rubberBandOrigin, QSize()));
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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 QChartView::mouseMoveEvent(QMouseEvent *event)
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{
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if(m_rubberBand && m_rubberBand->isVisible()) {
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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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int width = event->pos().x() - m_rubberBandOrigin.x();
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int height = event->pos().y() - m_rubberBandOrigin.y();
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if(!m_verticalRubberBand) {
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m_rubberBandOrigin.setY(rect.top());
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height = rect.height();
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}
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if(!m_horizonalRubberBand) {
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m_rubberBandOrigin.setX(rect.left());
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width= rect.width();
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}
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m_rubberBand->setGeometry(QRect(m_rubberBandOrigin.x(),m_rubberBandOrigin.y(), width,height).normalized());
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}
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else {
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QGraphicsView::mouseMoveEvent(event);
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}
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}
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void QChartView::mouseReleaseEvent(QMouseEvent *event)
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{
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if(m_rubberBand) {
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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->zoomIn(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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else {
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QGraphicsView::mouseReleaseEvent(event);
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}
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}
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void QChartView::keyPressEvent(QKeyEvent *event)
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{
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switch (event->key()) {
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case Qt::Key_Plus:
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zoomIn();
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break;
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case Qt::Key_Minus:
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zoomOut();
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break;
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default:
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QGraphicsView::keyPressEvent(event);
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break;
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}
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}
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/*!
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Sets the \a theme used by the chart for rendering the graphical representation of the data
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\sa QChart::ChartTheme, chartTheme()
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*/
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void QChartView::setChartTheme(QChart::ChartTheme theme)
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{
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m_chart->setChartTheme(theme);
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}
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/*!
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Returns the theme enum used by the chart.
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\sa setChartTheme()
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*/
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QChart::ChartTheme QChartView::chartTheme() const
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{
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return m_chart->chartTheme();
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}
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/*!
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Returns the pointer to the x axis object of the chart
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*/
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QChartAxis* QChartView::axisX() const
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{
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return m_chart->axisX();
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}
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/*!
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Returns the pointer to the y axis object of the chart
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*/
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QChartAxis* QChartView::axisY() const
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{
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return m_chart->axisY();
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}
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QTCOMMERCIALCHART_END_NAMESPACE
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