qchartview.cpp
283 lines
| 7.6 KiB
| text/x-c
|
CppLexer
/ src / qchartview.cpp
Michal Klocek
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r58 | #include "qchartview.h" | ||
| #include "qchart.h" | ||||
|
Michal Klocek
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r176 | #include "qchartaxis.h" | ||
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Michal Klocek
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r58 | #include <QGraphicsView> | ||
| #include <QGraphicsScene> | ||||
| #include <QRubberBand> | ||||
| #include <QResizeEvent> | ||||
| #include <QDebug> | ||||
Marek Rosa
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r233 | /*! | ||
| \class QChartView | ||||
|
Marek Rosa
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r274 | \brief Chart widget | ||
| QChartView is a standalone widget that can display charts. It does not require QGraphicsScene to work. It manages the graphical | ||||
| representation of different types of QChartSeries and other chart related objects like | ||||
| QChartAxis and QChartLegend. If you want to display a chart in your existing QGraphicsScene, you can use the QChart class instead. | ||||
| \sa QChart | ||||
|
Marek Rosa
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r233 | */ | ||
|
Michal Klocek
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r58 | QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||
| QChartView::QChartView(QWidget *parent) : | ||||
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Michal Klocek
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r176 | QGraphicsView(parent), | ||
Jani Honkonen
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r204 | m_scene(new QGraphicsScene(this)), | ||
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Michal Klocek
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r176 | m_chart(new QChart()), | ||
| m_rubberBand(0), | ||||
| m_verticalRubberBand(false), | ||||
| m_horizonalRubberBand(false) | ||||
| { | ||||
| setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff); | ||||
|
Michal Klocek
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r58 | setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff); | ||
| setScene(m_scene); | ||||
| m_chart->setMargin(50); | ||||
| m_scene->addItem(m_chart); | ||||
| setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding); | ||||
| } | ||||
|
Marek Rosa
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r277 | |||
| /*! | ||||
| Destroys the object and it's children, like QChartSeries and QChartAxis object added to it. | ||||
| */ | ||||
|
Michal Klocek
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r58 | QChartView::~QChartView() | ||
| { | ||||
| } | ||||
| void QChartView::resizeEvent(QResizeEvent *event) | ||||
| { | ||||
| m_scene->setSceneRect(0,0,size().width(),size().height()); | ||||
|
Michal Klocek
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r115 | m_chart->resize(size()); | ||
|
Michal Klocek
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r58 | QWidget::resizeEvent(event); | ||
| } | ||||
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Marek Rosa
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r274 | /*! | ||
| Adds the series and optional y axis onto the chart and takes the ownership of the objects. | ||||
| If auto scaling is enabled, re-scales the axes the series is bound to (both the x axis and | ||||
| the y axis). | ||||
| \sa removeSeries, removeAllSeries | ||||
| */ | ||||
|
Michal Klocek
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r223 | void QChartView::addSeries(QChartSeries* series,QChartAxis *axisY) | ||
|
Michal Klocek
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r58 | { | ||
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Michal Klocek
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r223 | m_chart->addSeries(series,axisY); | ||
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Michal Klocek
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r58 | } | ||
|
Marek Rosa
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r274 | /*! | ||
| Removes the QChartSeries specified in a perameter from the QChartView. | ||||
| It releses its ownership of the specified QChartSeries object. | ||||
| It does not delete the pointed QChartSeries data object | ||||
| \sa removeSeries(), removeAllSeries() | ||||
| */ | ||||
|
Michal Klocek
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r245 | void QChartView::removeSeries(QChartSeries* series) | ||
| { | ||||
| m_chart->removeSeries(series); | ||||
| } | ||||
|
Marek Rosa
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r274 | /*! | ||
| Removes all the QChartSeries that have been added to the QChartView | ||||
| It also deletes the pointed QChartSeries data objects | ||||
| \sa addSeries(), removeSeries() | ||||
| */ | ||||
|
Michal Klocek
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r258 | void QChartView::removeAllSeries() | ||
| { | ||||
| m_chart->removeAllSeries(); | ||||
| } | ||||
|
Michal Klocek
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r223 | void QChartView::zoomIn() | ||
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Michal Klocek
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r58 | { | ||
|
Michal Klocek
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r223 | m_chart->zoomIn(); | ||
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Michal Klocek
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r58 | } | ||
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Michal Klocek
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r223 | void QChartView::zoomIn(const QRect& rect) | ||
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Michal Klocek
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r58 | { | ||
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Michal Klocek
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r223 | m_chart->zoomIn(rect); | ||
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Michal Klocek
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r58 | } | ||
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Michal Klocek
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r67 | void QChartView::zoomOut() | ||
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Michal Klocek
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r58 | { | ||
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Michal Klocek
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r67 | m_chart->zoomOut(); | ||
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Michal Klocek
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r58 | } | ||
|
Marek Rosa
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r274 | /*! | ||
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Marek Rosa
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r277 | 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. | ||
|
Marek Rosa
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r274 | */ | ||
|
Michal Klocek
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r67 | int QChartView::margin() const | ||
| { | ||||
| return m_chart->margin(); | ||||
| } | ||||
|
Michal Klocek
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r69 | |||
|
Marek Rosa
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r274 | /*! | ||
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Marek Rosa
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r277 | Sets the chart \a tile. A description text that is rendered above the chart. | ||
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Marek Rosa
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r274 | */ | ||
|
Michal Klocek
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r192 | void QChartView::setChartTitle(const QString& title) | ||
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Michal Klocek
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r69 | { | ||
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Michal Klocek
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r192 | m_chart->setChartTitle(title); | ||
| } | ||||
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Marek Rosa
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r274 | /*! | ||
|
Marek Rosa
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r277 | Sets the \a font that is used for rendering the description text that is rendered above the chart. | ||
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Marek Rosa
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r274 | */ | ||
|
Michal Klocek
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r192 | void QChartView::setChartTitleFont(const QFont& font) | ||
| { | ||||
| m_chart->setChartTitleFont(font); | ||||
|
Michal Klocek
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r69 | } | ||
|
Marek Rosa
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r277 | /*! | ||
| Sets the \a brush that is used for painting the background of the chart area of the QChartView widget. | ||||
| */ | ||||
|
Michal Klocek
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r122 | void QChartView::setChartBackgroundBrush(const QBrush& brush) | ||
| { | ||||
|
Michal Klocek
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r176 | m_chart->setChartBackgroundBrush(brush); | ||
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Michal Klocek
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r122 | } | ||
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Marek Rosa
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r277 | |||
| /*! | ||||
| Sets the \a pen that is used for painting the background of the chart area of the QChartView widget. | ||||
| */ | ||||
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Michal Klocek
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r122 | void QChartView::setChartBackgroundPen(const QPen& pen) | ||
| { | ||||
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Michal Klocek
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r176 | m_chart->setChartBackgroundPen(pen); | ||
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Michal Klocek
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r122 | } | ||
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Michal Klocek
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r136 | |||
| void QChartView::setRubberBandPolicy(const RubberBandPolicy policy) | ||||
| { | ||||
|
Michal Klocek
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r176 | switch(policy) { | ||
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Michal Klocek
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r136 | case VerticalRubberBand: | ||
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Michal Klocek
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r176 | m_verticalRubberBand = true; | ||
| m_horizonalRubberBand = false; | ||||
| break; | ||||
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Michal Klocek
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r136 | case HorizonalRubberBand: | ||
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Michal Klocek
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r176 | m_verticalRubberBand = false; | ||
| m_horizonalRubberBand = true; | ||||
| break; | ||||
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Michal Klocek
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r136 | case RectangleRubberBand: | ||
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Michal Klocek
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r176 | m_verticalRubberBand = true; | ||
| m_horizonalRubberBand = true; | ||||
| break; | ||||
|
Michal Klocek
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r136 | case NoRubberBand: | ||
| default: | ||||
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Michal Klocek
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r176 | delete m_rubberBand; | ||
| m_rubberBand=0; | ||||
| m_horizonalRubberBand = false; | ||||
| m_verticalRubberBand = false; | ||||
| return; | ||||
|
Michal Klocek
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r136 | } | ||
|
Michal Klocek
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r176 | if(!m_rubberBand) { | ||
| m_rubberBand = new QRubberBand(QRubberBand::Rectangle, this); | ||||
| m_rubberBand->setEnabled(true); | ||||
|
Michal Klocek
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r138 | } | ||
|
Michal Klocek
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r136 | } | ||
| QChartView::RubberBandPolicy QChartView::rubberBandPolicy() const | ||||
| { | ||||
| if(m_horizonalRubberBand && m_verticalRubberBand) return RectangleRubberBand; | ||||
| if(m_horizonalRubberBand) return HorizonalRubberBand; | ||||
| if(m_verticalRubberBand) return VerticalRubberBand; | ||||
| return NoRubberBand; | ||||
| } | ||||
| void QChartView::mousePressEvent(QMouseEvent *event) | ||||
| { | ||||
| if(m_rubberBand && m_rubberBand->isEnabled() && event->button() == Qt::LeftButton) { | ||||
| int margin = m_chart->margin(); | ||||
| QRect rect(margin, margin, width() - 2 * margin, height() - 2 * margin); | ||||
| if (rect.contains(event->pos())) { | ||||
| m_rubberBandOrigin = event->pos(); | ||||
| m_rubberBand->setGeometry(QRect(m_rubberBandOrigin, QSize())); | ||||
| m_rubberBand->show(); | ||||
| event->accept(); | ||||
| } | ||||
| } | ||||
| } | ||||
| void QChartView::mouseMoveEvent(QMouseEvent *event) | ||||
| { | ||||
|
Michal Klocek
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r176 | if(m_rubberBand && m_rubberBand->isVisible()) { | ||
|
Michal Klocek
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r136 | int margin = m_chart->margin(); | ||
| QRect rect(margin, margin, width() - 2 * margin, height() - 2 * margin); | ||||
| int width = event->pos().x() - m_rubberBandOrigin.x(); | ||||
| int height = event->pos().y() - m_rubberBandOrigin.y(); | ||||
| if(!m_verticalRubberBand) { | ||||
| m_rubberBandOrigin.setY(rect.top()); | ||||
| height = rect.height(); | ||||
| } | ||||
| if(!m_horizonalRubberBand) { | ||||
| m_rubberBandOrigin.setX(rect.left()); | ||||
| width= rect.width(); | ||||
| } | ||||
| m_rubberBand->setGeometry(QRect(m_rubberBandOrigin.x(),m_rubberBandOrigin.y(), width,height).normalized()); | ||||
|
Michal Klocek
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r176 | } | ||
| else { | ||||
|
Michal Klocek
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r136 | QGraphicsView::mouseMoveEvent(event); | ||
| } | ||||
| } | ||||
| void QChartView::mouseReleaseEvent(QMouseEvent *event) | ||||
| { | ||||
|
Michal Klocek
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r176 | if(m_rubberBand) { | ||
| if (event->button() == Qt::LeftButton && m_rubberBand->isVisible()) { | ||||
| m_rubberBand->hide(); | ||||
| QRect rect = m_rubberBand->geometry(); | ||||
|
Michal Klocek
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r223 | m_chart->zoomIn(rect); | ||
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Michal Klocek
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r176 | event->accept(); | ||
| } | ||||
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Michal Klocek
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r136 | |||
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Michal Klocek
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r176 | if(event->button()==Qt::RightButton) | ||
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Michal Klocek
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r136 | m_chart->zoomReset(); | ||
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Michal Klocek
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r176 | } | ||
| else { | ||||
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Michal Klocek
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r136 | QGraphicsView::mouseReleaseEvent(event); | ||
| } | ||||
| } | ||||
| void QChartView::keyPressEvent(QKeyEvent *event) | ||||
| { | ||||
| switch (event->key()) { | ||||
|
Michal Klocek
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r176 | case Qt::Key_Plus: | ||
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Michal Klocek
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r136 | zoomIn(); | ||
| break; | ||||
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Michal Klocek
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r176 | case Qt::Key_Minus: | ||
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Michal Klocek
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r136 | zoomOut(); | ||
| break; | ||||
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Michal Klocek
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r176 | default: | ||
|
Michal Klocek
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r136 | QGraphicsView::keyPressEvent(event); | ||
| break; | ||||
| } | ||||
| } | ||||
|
Marek Rosa
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r277 | /*! | ||
| Sets the \a theme used by the chart for rendering the graphical representation of the data | ||||
| \sa QChart::ChartTheme, chartTheme() | ||||
| */ | ||||
|
Michal Klocek
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r153 | void QChartView::setChartTheme(QChart::ChartTheme theme) | ||
|
Michal Klocek
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r136 | { | ||
|
Michal Klocek
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r153 | m_chart->setChartTheme(theme); | ||
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Michal Klocek
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r136 | } | ||
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Marek Rosa
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r277 | /*! | ||
| Returns the theme enum used by the chart. | ||||
| \sa setChartTheme() | ||||
| */ | ||||
|
Michal Klocek
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r153 | QChart::ChartTheme QChartView::chartTheme() const | ||
| { | ||||
| return m_chart->chartTheme(); | ||||
| } | ||||
|
Michal Klocek
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r136 | |||
|
Marek Rosa
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r274 | /*! | ||
| Returns the pointer to the x axis object of the chart | ||||
| */ | ||||
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Michal Klocek
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r223 | QChartAxis* QChartView::axisX() const | ||
|
Michal Klocek
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r155 | { | ||
|
Michal Klocek
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r223 | return m_chart->axisX(); | ||
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Michal Klocek
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r155 | } | ||
|
Marek Rosa
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r274 | /*! | ||
| Returns the pointer to the y axis object of the chart | ||||
| */ | ||||
|
Michal Klocek
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r223 | QChartAxis* QChartView::axisY() const | ||
|
Michal Klocek
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r155 | { | ||
|
Michal Klocek
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r223 | return m_chart->axisY(); | ||
|
Michal Klocek
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r155 | } | ||
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Michal Klocek
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r58 | QTCOMMERCIALCHART_END_NAMESPACE | ||