qchart.cpp
258 lines
| 6.2 KiB
| text/x-c
|
CppLexer
/ src / qchart.cpp
Michal Klocek
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r12 | #include "qchart.h" | ||
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Michal Klocek
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r85 | #include "qchartaxis.h" | ||
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Michal Klocek
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r131 | #include "chartpresenter_p.h" | ||
| #include "chartdataset_p.h" | ||||
Tero Ahola
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r42 | #include <QGraphicsScene> | ||
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Michal Klocek
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r115 | #include <QGraphicsSceneResizeEvent> | ||
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Michal Klocek
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r21 | #include <QDebug> | ||
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Michal Klocek
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r12 | |||
Marek Rosa
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r277 | QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||
| /*! | ||||
| \enum QChart::ChartTheme | ||||
| This enum describes the theme used by the chart. | ||||
| \value ChartThemeDefault | ||||
| \value ChartThemeVanilla | ||||
| \value ChartThemeIcy | ||||
| \value ChartThemeGrayscale | ||||
| \value ChartThemeScientific | ||||
| */ | ||||
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Tero Ahola
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r264 | /*! | ||
| \class QChart | ||||
| \brief QtCommercial chart API. | ||||
| QChart is a QGraphicsWidget that you can show in a QGraphicsScene. It manages the graphical | ||||
| representation of different types of QChartSeries and other chart related objects like | ||||
| QChartAxis and QChartLegend. If you simply want to show a chart in a layout, you can use the | ||||
| convenience class QChartView instead of QChart. | ||||
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Marek Rosa
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r274 | \sa QChartView | ||
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Tero Ahola
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r264 | */ | ||
| /*! | ||||
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Marek Rosa
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r287 | Constructs a chart object which is a child of a\a parent. Parameter \a wFlags is passed to the QGraphicsWidget constructor. | ||
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Tero Ahola
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r264 | */ | ||
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Michal Klocek
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r115 | QChart::QChart(QGraphicsItem *parent, Qt::WindowFlags wFlags) : QGraphicsWidget(parent,wFlags), | ||
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Tero Ahola
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r264 | m_backgroundItem(0), | ||
| m_titleItem(0), | ||||
| m_dataset(new ChartDataSet(this)), | ||||
| m_presenter(new ChartPresenter(this,m_dataset)) | ||||
|
Michal Klocek
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r12 | { | ||
| } | ||||
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Tero Ahola
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r264 | /*! | ||
| Destroys the object and it's children, like QChartSeries and QChartAxis object added to it. | ||||
| */ | ||||
| QChart::~QChart() | ||||
| { | ||||
| } | ||||
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Michal Klocek
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r12 | |||
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Tero Ahola
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r264 | /*! | ||
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Marek Rosa
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r285 | Adds the \a series and optional \a axisY onto the chart and takes the ownership of the objects. | ||
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Tero Ahola
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r264 | If auto scaling is enabled, re-scales the axes the series is bound to (both the x axis and | ||
| the y axis). | ||||
| */ | ||||
| void QChart::addSeries(QChartSeries* series, QChartAxis* axisY) | ||||
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Michal Klocek
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r223 | { | ||
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Tero Ahola
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r264 | m_dataset->addSeries(series, axisY); | ||
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Michal Klocek
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r223 | } | ||
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Tero Ahola
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r42 | |||
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Marek Rosa
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r274 | /*! | ||
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Marek Rosa
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r285 | Removes the \a series specified in a perameter from the QChartView. | ||
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Marek Rosa
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r274 | It releses its ownership of the specified QChartSeries object. | ||
| It does not delete the pointed QChartSeries data object | ||||
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Marek Rosa
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r285 | \sa addSeries(), removeAllSeries() | ||
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Marek Rosa
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r274 | */ | ||
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Michal Klocek
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r223 | void QChart::removeSeries(QChartSeries* series) | ||
| { | ||||
| m_dataset->removeSeries(series); | ||||
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Tero Ahola
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r42 | } | ||
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Tero Ahola
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r48 | |||
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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() | ||||
| */ | ||||
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Michal Klocek
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r258 | void QChart::removeAllSeries() | ||
| { | ||||
| m_dataset->removeAllSeries(); | ||||
| } | ||||
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Marek Rosa
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r287 | /*! | ||
| Sets the \a brush that is used for painting the background of the chart area. | ||||
| */ | ||||
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Michal Klocek
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r122 | void QChart::setChartBackgroundBrush(const QBrush& brush) | ||
| { | ||||
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Michal Klocek
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r223 | createChartBackgroundItem(); | ||
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Michal Klocek
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r122 | m_backgroundItem->setBrush(brush); | ||
| m_backgroundItem->update(); | ||||
| } | ||||
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Marek Rosa
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r287 | /*! | ||
| Sets the \a pen that is used for painting the background of the chart area. | ||||
| */ | ||||
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Michal Klocek
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r122 | void QChart::setChartBackgroundPen(const QPen& pen) | ||
| { | ||||
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Michal Klocek
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r223 | createChartBackgroundItem(); | ||
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Michal Klocek
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r122 | m_backgroundItem->setPen(pen); | ||
| m_backgroundItem->update(); | ||||
| } | ||||
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Marek Rosa
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r274 | /*! | ||
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Marek Rosa
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r277 | Sets the chart \a title. The description text that is rendered above the chart. | ||
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Marek Rosa
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r274 | */ | ||
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Michal Klocek
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r192 | void QChart::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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r223 | createChartTitleItem(); | ||
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Michal Klocek
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r87 | m_titleItem->setPlainText(title); | ||
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Michal Klocek
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r192 | } | ||
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Marek Rosa
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r274 | /*! | ||
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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 | */ | ||
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Michal Klocek
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r192 | void QChart::setChartTitleFont(const QFont& font) | ||
| { | ||||
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Michal Klocek
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r223 | createChartTitleItem(); | ||
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Michal Klocek
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r87 | m_titleItem->setFont(font); | ||
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Michal Klocek
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r69 | } | ||
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Michal Klocek
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r223 | void QChart::createChartBackgroundItem() | ||
| { | ||||
| if(!m_backgroundItem) { | ||||
| m_backgroundItem = new QGraphicsRectItem(this); | ||||
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Michal Klocek
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r272 | m_backgroundItem->setPen(Qt::NoPen); | ||
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Michal Klocek
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r262 | m_backgroundItem->setZValue(ChartPresenter::BackgroundZValue); | ||
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Michal Klocek
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r223 | } | ||
| } | ||||
| void QChart::createChartTitleItem() | ||||
| { | ||||
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Michal Klocek
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r262 | if(!m_titleItem) { | ||
| m_titleItem = new QGraphicsTextItem(this); | ||||
| m_titleItem->setZValue(ChartPresenter::BackgroundZValue); | ||||
| } | ||||
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Michal Klocek
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r223 | } | ||
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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. | ||||
| \sa setMargin() | ||||
| */ | ||||
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Michal Klocek
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r28 | int QChart::margin() const | ||
| { | ||||
Jani Honkonen
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r142 | return m_presenter->margin(); | ||
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Michal Klocek
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r28 | } | ||
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Marek Rosa
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r277 | /*! | ||
| Sets the chart \a margin, which is the distance between the widget edge and the part of the chart where the actual data can be displayed. | ||||
| \sa margin() | ||||
| */ | ||||
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Michal Klocek
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r12 | void QChart::setMargin(int margin) | ||
| { | ||||
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Michal Klocek
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r143 | m_presenter->setMargin(margin); | ||
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Michal Klocek
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r12 | } | ||
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Marek Rosa
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r277 | /*! | ||
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Marek Rosa
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r285 | Sets the \a theme used by the chart for rendering the graphical representation of the data | ||
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Marek Rosa
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r277 | \sa ChartTheme, chartTheme() | ||
| */ | ||||
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Michal Klocek
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r153 | void QChart::setChartTheme(QChart::ChartTheme theme) | ||
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Tero Ahola
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r64 | { | ||
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Michal Klocek
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r153 | m_presenter->setChartTheme(theme); | ||
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Tero Ahola
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r64 | } | ||
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Marek Rosa
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r277 | /*! | ||
| Returns the theme enum used by the chart. | ||||
| \sa ChartTheme, setChartTheme() | ||||
| */ | ||||
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Michal Klocek
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r153 | QChart::ChartTheme QChart::chartTheme() const | ||
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Tero Ahola
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r120 | { | ||
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Michal Klocek
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r153 | return m_presenter->chartTheme(); | ||
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Tero Ahola
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r120 | } | ||
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Marek Rosa
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r285 | /*! | ||
| Zooms in the view by a factor of 2 | ||||
| */ | ||||
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Michal Klocek
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r223 | void QChart::zoomIn() | ||
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Michal Klocek
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r67 | { | ||
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Michal Klocek
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r223 | if (!m_dataset->nextDomain()) { | ||
| QRectF rect = m_presenter->geometry(); | ||||
| rect.setWidth(rect.width()/2); | ||||
| rect.setHeight(rect.height()/2); | ||||
| rect.moveCenter(m_presenter->geometry().center()); | ||||
| zoomIn(rect); | ||||
| } | ||||
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Michal Klocek
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r67 | } | ||
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Marek Rosa
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r285 | /*! | ||
| Zooms in the view to a maximum level at which \a rect is still fully visible. | ||||
| */ | ||||
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Michal Klocek
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r223 | void QChart::zoomIn(const QRectF& rect) | ||
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Michal Klocek
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r67 | { | ||
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Michal Klocek
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r223 | if(!rect.isValid()) return; | ||
| QRectF r = rect.normalized(); | ||||
| int margin = m_presenter->margin(); | ||||
| r.translate(-margin, -margin); | ||||
| m_dataset->addDomain(r,m_presenter->geometry()); | ||||
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Michal Klocek
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r67 | } | ||
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Marek Rosa
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r285 | /*! | ||
| Restores the view zoom level to the previous one. | ||||
| */ | ||||
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Michal Klocek
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r67 | void QChart::zoomOut() | ||
| { | ||||
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Michal Klocek
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r223 | m_dataset->previousDomain(); | ||
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Michal Klocek
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r67 | } | ||
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Marek Rosa
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r287 | /*! | ||
| Resets to the default view. | ||||
| */ | ||||
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Tero Ahola
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r93 | void QChart::zoomReset() | ||
| { | ||||
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Michal Klocek
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r223 | m_dataset->clearDomains(); | ||
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Michal Klocek
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r176 | } | ||
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Marek Rosa
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r277 | /*! | ||
| Returns the pointer to the x axis object of the chart | ||||
| */ | ||||
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Michal Klocek
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r223 | QChartAxis* QChart::axisX() const | ||
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Michal Klocek
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r176 | { | ||
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Michal Klocek
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r223 | return m_dataset->axisX(); | ||
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Michal Klocek
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r176 | } | ||
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Marek Rosa
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r277 | /*! | ||
| Returns the pointer to the y axis object of the chart | ||||
| */ | ||||
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Michal Klocek
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r223 | QChartAxis* QChart::axisY() const | ||
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Michal Klocek
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r176 | { | ||
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Michal Klocek
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r223 | return m_dataset->axisY(); | ||
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Michal Klocek
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r85 | } | ||
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Marek Rosa
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r287 | /*! | ||
| Resizes and updates the chart area using the \a event data | ||||
| */ | ||||
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Michal Klocek
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r115 | void QChart::resizeEvent(QGraphicsSceneResizeEvent *event) | ||
| { | ||||
| m_rect = QRectF(QPoint(0,0),event->newSize()); | ||||
| QRectF rect = m_rect.adjusted(margin(),margin(), -margin(), -margin()); | ||||
| // recalculate title position | ||||
| if (m_titleItem) { | ||||
| QPointF center = m_rect.center() -m_titleItem->boundingRect().center(); | ||||
| m_titleItem->setPos(center.x(),m_rect.top()/2 + margin()/2); | ||||
| } | ||||
| //recalculate background gradient | ||||
| if (m_backgroundItem) { | ||||
| m_backgroundItem->setRect(rect); | ||||
| } | ||||
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Michal Klocek
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r117 | QGraphicsWidget::resizeEvent(event); | ||
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Michal Klocek
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r115 | update(); | ||
| } | ||||
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Tero Ahola
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r64 | #include "moc_qchart.cpp" | ||
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Tero Ahola
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r48 | |||
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Tero Ahola
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r30 | QTCOMMERCIALCHART_END_NAMESPACE | ||