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#include "qchart.h"
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#include "qchartaxis.h"
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#include "qlegend.h"
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#include "chartpresenter_p.h"
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#include "chartdataset_p.h"
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#include "chartbackground_p.h"
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#include <QGraphicsScene>
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#include <QGraphicsSceneResizeEvent>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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/*!
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\enum QChart::ChartTheme
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This enum describes the theme used by the chart.
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\value ChartThemeDefault Follows the GUI style of the Operating System
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\value ChartThemeLight
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\value ChartThemeBlueCerulean
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\value ChartThemeDark
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\value ChartThemeBrownSand
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\value ChartThemeBlueNcs
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\value ChartThemeIcy
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\value ChartThemeScientific
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\value ChartThemeCount Not really a theme; the total count of themes.
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*/
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/*!
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\enum QChart::AnimationOption
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For enabling/disabling animations. Defaults to NoAnimation.
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\value NoAnimation
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\value GridAxisAnimations
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\value SeriesAnimations
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\value AllAnimations
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*/
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/*!
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\class QChart
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\brief QtCommercial chart API.
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QChart is a QGraphicsWidget that you can show in a QGraphicsScene. 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 simply want to show a chart in a layout, you can use the
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convenience class QChartView instead of QChart.
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\sa QChartView
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*/
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/*!
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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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*/
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QChart::QChart(QGraphicsItem *parent, Qt::WindowFlags wFlags) : QGraphicsWidget(parent,wFlags),
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m_backgroundItem(0),
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m_titleItem(0),
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m_legend(new QLegend(this)),
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m_dataset(new ChartDataSet(this)),
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m_presenter(new ChartPresenter(this,m_dataset)),
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m_padding(50),
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m_backgroundPadding(10)
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{
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connect(m_dataset,SIGNAL(seriesAdded(QSeries*,Domain*)),m_legend,SLOT(handleSeriesAdded(QSeries*,Domain*)));
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connect(m_dataset,SIGNAL(seriesRemoved(QSeries*)),m_legend,SLOT(handleSeriesRemoved(QSeries*)));
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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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QChart::~QChart()
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{
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//delete first presenter , since this is a root of all the graphical items
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delete m_presenter;
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m_presenter=0;
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}
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/*!
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Adds the \a series and optional \a axisY 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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*/
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void QChart::addSeries(QSeries* series, QChartAxis* axisY)
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{
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m_dataset->addSeries(series, axisY);
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}
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/*!
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Removes the \a series 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 addSeries(), removeAllSeries()
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*/
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void QChart::removeSeries(QSeries* series)
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{
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m_dataset->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 QChart::removeAllSeries()
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{
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m_dataset->removeAllSeries();
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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.
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*/
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void QChart::setBackgroundBrush(const QBrush& brush)
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{
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createChartBackgroundItem();
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m_backgroundItem->setBrush(brush);
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m_backgroundItem->update();
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}
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QBrush QChart::backgroundBrush() const
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{
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if(!m_backgroundItem) return QBrush();
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return m_backgroundItem->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.
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*/
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void QChart::setBackgroundPen(const QPen& pen)
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{
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createChartBackgroundItem();
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m_backgroundItem->setPen(pen);
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m_backgroundItem->update();
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}
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QPen QChart::backgroundPen() const
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{
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if(!m_backgroundItem) return QPen();
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return m_backgroundItem->pen();
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}
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/*!
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Sets the chart \a title. The description text that is drawn above the chart.
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*/
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void QChart::setTitle(const QString& title)
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{
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createChartTitleItem();
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m_titleItem->setText(title);
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updateLayout();
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}
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/*!
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Returns the chart title. The description text that is drawn above the chart.
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*/
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QString QChart::title() const
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{
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if(m_titleItem)
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return m_titleItem->text();
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else
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return QString();
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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 QChart::setTitleFont(const QFont& font)
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{
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createChartTitleItem();
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m_titleItem->setFont(font);
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updateLayout();
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}
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/*!
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Sets the \a brush used for rendering the title text.
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*/
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void QChart::setTitleBrush(const QBrush &brush)
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{
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createChartTitleItem();
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m_titleItem->setBrush(brush);
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updateLayout();
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}
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/*!
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Returns the brush used for rendering the title text.
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*/
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QBrush QChart::titleBrush() const
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{
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if(!m_titleItem) return QBrush();
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return m_titleItem->brush();
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}
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void QChart::createChartBackgroundItem()
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{
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if(!m_backgroundItem) {
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m_backgroundItem = new ChartBackground(this);
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m_backgroundItem->setPen(Qt::NoPen);
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m_backgroundItem->setZValue(ChartPresenter::BackgroundZValue);
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}
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}
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void QChart::createChartTitleItem()
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{
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if(!m_titleItem) {
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m_titleItem = new QGraphicsSimpleTextItem(this);
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m_titleItem->setZValue(ChartPresenter::BackgroundZValue);
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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 ChartTheme, chartTheme()
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*/
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void QChart::setChartTheme(QChart::ChartTheme theme)
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{
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m_presenter->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 ChartTheme, setChartTheme()
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*/
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QChart::ChartTheme QChart::chartTheme() const
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{
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return m_presenter->chartTheme();
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}
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/*!
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Zooms in the view by a factor of 2
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*/
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void QChart::zoomIn()
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{
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m_presenter->zoomIn();
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}
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/*!
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Zooms in the view to a maximum level at which \a rect is still fully visible.
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*/
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void QChart::zoomIn(const QRectF& rect)
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{
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if(!rect.isValid()) return;
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m_presenter->zoomIn(rect);
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}
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/*!
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Restores the view zoom level to the previous one.
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*/
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void QChart::zoomOut()
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{
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m_presenter->zoomOut();
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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* QChart::axisX() const
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{
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return m_dataset->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* QChart::axisY() const
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{
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return m_dataset->axisY();
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}
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/*!
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Returns the legend object of the chart. Ownership stays in chart.
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*/
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QLegend& QChart::legend() const
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{
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return *m_legend;
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}
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/*!
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Gives ownership of legend to user.
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*/
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QLegend* QChart::takeLegend()
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{
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QLegend* l = m_legend;
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m_legend = 0;
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return l;
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}
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/*!
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Gives ownership of legend back to chart. QChart takes ownership of \a legend and deletes existing one
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*/
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void QChart::giveLegend(QLegend* legend)
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{
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if (m_legend) {
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// Should not happen.
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qDebug() << "Warning! Giving more than one legend to chart.";
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delete m_legend;
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}
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m_legend = legend;
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// Reconnect legend, in case not already connected.
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disconnect(m_dataset,SIGNAL(seriesAdded(QSeries*,Domain*)),m_legend,SLOT(handleSeriesAdded(QSeries*,Domain*)));
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disconnect(m_dataset,SIGNAL(seriesRemoved(QSeries*)),m_legend,SLOT(handleSeriesRemoved(QSeries*)));
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connect(m_dataset,SIGNAL(seriesAdded(QSeries*,Domain*)),m_legend,SLOT(handleSeriesAdded(QSeries*,Domain*)));
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connect(m_dataset,SIGNAL(seriesRemoved(QSeries*)),m_legend,SLOT(handleSeriesRemoved(QSeries*)));
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}
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/*!
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Resizes and updates the chart area using the \a event data
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*/
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void QChart::resizeEvent(QGraphicsSceneResizeEvent *event)
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{
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m_rect = QRectF(QPoint(0,0),event->newSize());
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updateLayout();
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QGraphicsWidget::resizeEvent(event);
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update();
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}
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/*!
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Sets animation \a options for the chart
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*/
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void QChart::setAnimationOptions(AnimationOptions options)
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{
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m_presenter->setAnimationOptions(options);
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}
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/*!
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Returns animation options for the chart
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*/
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QChart::AnimationOptions QChart::animationOptions() const
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{
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return m_presenter->animationOptions();
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}
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void QChart::scrollLeft()
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{
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m_presenter->scroll(-m_presenter->geometry().width()/(axisX()->ticksCount()-1),0);
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}
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void QChart::scrollRight()
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{
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m_presenter->scroll(m_presenter->geometry().width()/(axisX()->ticksCount()-1),0);
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}
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void QChart::scrollUp()
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{
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m_presenter->scroll(0,m_presenter->geometry().width()/(axisY()->ticksCount()-1));
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}
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void QChart::scrollDown()
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{
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m_presenter->scroll(0,-m_presenter->geometry().width()/(axisY()->ticksCount()-1));
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}
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void QChart::updateLayout()
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{
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if(!m_rect.isValid()) return;
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QRectF rect = m_rect.adjusted(m_padding,m_padding, -m_padding, -m_padding);
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// recalculate title position
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if (m_titleItem) {
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QPointF center = m_rect.center() -m_titleItem->boundingRect().center();
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m_titleItem->setPos(center.x(),m_rect.top()/2 + m_padding/2);
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}
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//recalculate background gradient
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if (m_backgroundItem) {
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m_backgroundItem->setRect(m_rect.adjusted(m_backgroundPadding,m_backgroundPadding, -m_backgroundPadding, -m_backgroundPadding));
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}
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// recalculate legend position
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if (m_legend) {
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if (m_legend->parentObject() == this) {
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updateLegendLayout();
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}
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}
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}
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void QChart::updateLegendLayout()
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{
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QRectF plotRect = m_rect.adjusted(m_padding,m_padding, -m_padding, -m_padding);
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QRectF legendRect;
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switch (m_legend->preferredLayout())
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{
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case QLegend::PreferredLayoutTop:{
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// legendRect = plotRect.adjusted(m_padding,0,-m_padding,-m_padding - plotRect.height());
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legendRect = plotRect.adjusted(0,0,0,-m_padding - plotRect.height());
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break;
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}
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case QLegend::PreferredLayoutBottom: {
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legendRect = plotRect.adjusted(m_padding,m_padding + plotRect.height(),-m_padding,0);
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break;
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}
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case QLegend::PreferredLayoutLeft: {
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legendRect = plotRect.adjusted(0,m_padding,-m_padding - plotRect.width(),-m_padding);
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break;
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}
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case QLegend::PreferredLayoutRight: {
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legendRect = plotRect.adjusted(m_padding + plotRect.width(),m_padding,0,-m_padding);
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break;
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}
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default: {
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legendRect = plotRect;
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break;
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}
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}
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m_legend->setMaximumSize(legendRect.size());
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m_legend->setPos(legendRect.topLeft());
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}
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int QChart::padding() const
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{
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return m_padding;
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}
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void QChart::setPadding(int padding)
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{
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if(m_padding==padding){
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m_padding = padding;
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m_presenter->handleGeometryChanged();
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updateLayout();
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}
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}
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void QChart::setBackgroundPadding(int padding)
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{
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if(m_backgroundPadding!=padding){
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m_backgroundPadding = padding;
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updateLayout();
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}
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}
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void QChart::setBackgroundDiameter(int diameter)
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{
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createChartBackgroundItem();
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m_backgroundItem->setDimeter(diameter);
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m_backgroundItem->update();
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}
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void QChart::setBackgroundVisible(bool visible)
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{
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createChartBackgroundItem();
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m_backgroundItem->setVisible(visible);
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}
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bool QChart::isBackgroundVisible() const
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{
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if(!m_backgroundItem) return false;
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return m_backgroundItem->isVisible();
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}
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#include "moc_qchart.cpp"
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QTCOMMERCIALCHART_END_NAMESPACE
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