QwtPlotMultiBarChart(3) Qwt User's Guide QwtPlotMultiBarChart(3) NAME QwtPlotMultiBarChart - QwtPlotMultiBarChart displays a series of a samples that consist each of a set of values. SYNOPSIS #include Inherits QwtPlotAbstractBarChart, and QwtSeriesStore< QwtSetSample >. Public Types enum ChartStyle { Grouped, Stacked } Chart styles. Public Member Functions QwtPlotMultiBarChart (const QString &title=QString()) QwtPlotMultiBarChart (const QwtText &title) virtual ~QwtPlotMultiBarChart () Destructor. virtual int rtti () const override void setBarTitles (const QList< QwtText > &) Set the titles for the bars. QList< QwtText > barTitles () const void setSamples (const QVector< QwtSetSample > &) void setSamples (const QVector< QVector< double > > &) void setSamples (QwtSeriesData< QwtSetSample > *) void setStyle (ChartStyle style) ChartStyle style () const void setSymbol (int valueIndex, QwtColumnSymbol *) Add a symbol to the symbol map. const QwtColumnSymbol * symbol (int valueIndex) const void resetSymbolMap () virtual void drawSeries (QPainter *, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const override virtual QRectF boundingRect () const override virtual QList< QwtLegendData > legendData () const override virtual QwtGraphic legendIcon (int index, const QSizeF &) const override Protected Member Functions QwtColumnSymbol * symbol (int valueIndex) virtual QwtColumnSymbol * specialSymbol (int sampleIndex, int valueIndex) const Create a symbol for special values. virtual void drawSample (QPainter *, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, const QwtInterval &boundingInterval, int index, const QwtSetSample &) const virtual void drawBar (QPainter *, int sampleIndex, int valueIndex, const QwtColumnRect &) const void drawStackedBars (QPainter *, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int index, double sampleWidth, const QwtSetSample &) const void drawGroupedBars (QPainter *, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int index, double sampleWidth, const QwtSetSample &) const Detailed Description QwtPlotMultiBarChart displays a series of a samples that consist each of a set of values. Each value is displayed as a bar, the bars of each set can be organized side by side or accumulated. Each bar of a set is rendered by a QwtColumnSymbol, that is set by setSymbol(). The bars of different sets use the same symbols. Exceptions are possible by overloading specialSymbol() or overloading drawBar(). Depending on its orientation() the bars are displayed horizontally or vertically. The bars cover the interval between the baseline() and the value. In opposite to most other plot items, QwtPlotMultiBarChart returns more than one entry for the legend - one for each symbol. See also QwtPlotBarChart, QwtPlotHistogram QwtPlotSeriesItem::orientation(), QwtPlotAbstractBarChart::baseline() Definition at line 41 of file qwt_plot_multi_barchart.h. Member Enumeration Documentation enum QwtPlotMultiBarChart::ChartStyle Chart styles. The default setting is QwtPlotMultiBarChart::Grouped. See also setStyle(), style() Enumerator Grouped The bars of a set are displayed side by side. Stacked The bars are displayed on top of each other accumulating to a single bar. All values of a set need to have the same sign. Definition at line 52 of file qwt_plot_multi_barchart.h. Constructor & Destructor Documentation QwtPlotMultiBarChart::QwtPlotMultiBarChart (const QString & title = QString()) [explicit] Constructor Parameters title Title of the chart Definition at line 62 of file qwt_plot_multi_barchart.cpp. QwtPlotMultiBarChart::QwtPlotMultiBarChart (const QwtText & title) [explicit] Constructor Parameters title Title of the chart Definition at line 52 of file qwt_plot_multi_barchart.cpp. Member Function Documentation QList< QwtText > QwtPlotMultiBarChart::barTitles () const Returns Bar titles See also setBarTitles(), legendData() Definition at line 148 of file qwt_plot_multi_barchart.cpp. QRectF QwtPlotMultiBarChart::boundingRect () const [override], [virtual] Returns Bounding rectangle of all samples. For an empty series the rectangle is invalid. Reimplemented from QwtPlotSeriesItem. Definition at line 302 of file qwt_plot_multi_barchart.cpp. void QwtPlotMultiBarChart::drawBar (QPainter * painter, int sampleIndex, int valueIndex, const QwtColumnRect & rect) const [protected], [virtual] Draw a bar Parameters painter Painter sampleIndex Index of the sample - might be -1 when the bar is painted for the legend valueIndex Index of a value in a set rect Directed target rectangle for the bar See also drawSeries() Definition at line 652 of file qwt_plot_multi_barchart.cpp. void QwtPlotMultiBarChart::drawGroupedBars (QPainter * painter, const QwtScaleMap & xMap, const QwtScaleMap & yMap, const QRectF & canvasRect, int index, double sampleWidth, const QwtSetSample & sample) const [protected] Draw a grouped sample Parameters painter Painter xMap x map yMap y map canvasRect Contents rectangle of the canvas index Index of the sample to be painted sampleWidth Bounding width for all bars of the sample sample Sample See also drawSeries(), sampleWidth() Definition at line 461 of file qwt_plot_multi_barchart.cpp. void QwtPlotMultiBarChart::drawSample (QPainter * painter, const QwtScaleMap & xMap, const QwtScaleMap & yMap, const QRectF & canvasRect, const QwtInterval & boundingInterval, int index, const QwtSetSample & sample) const [protected], [virtual] Draw a sample Parameters painter Painter xMap x map yMap y map canvasRect Contents rectangle of the canvas boundingInterval Bounding interval of sample values index Index of the sample to be painted sample Sample value See also drawSeries() Definition at line 415 of file qwt_plot_multi_barchart.cpp. void QwtPlotMultiBarChart::drawSeries (QPainter * painter, const QwtScaleMap & xMap, const QwtScaleMap & yMap, const QRectF & canvasRect, int from, int to) const [override], [virtual] Draw an interval of the bar chart Parameters painter Painter xMap Maps x-values into pixel coordinates. yMap Maps y-values into pixel coordinates. canvasRect Contents rectangle of the canvas from Index of the first point to be painted to Index of the last point to be painted. If to < 0 the curve will be painted to its last point. See also drawSymbols() Implements QwtPlotSeriesItem. Definition at line 374 of file qwt_plot_multi_barchart.cpp. void QwtPlotMultiBarChart::drawStackedBars (QPainter * painter, const QwtScaleMap & xMap, const QwtScaleMap & yMap, const QRectF & canvasRect, int index, double sampleWidth, const QwtSetSample & sample) const [protected] Draw a stacked sample Parameters painter Painter xMap x map yMap y map canvasRect Contents rectangle of the canvas index Index of the sample to be painted sampleWidth Width of the bars sample Sample See also drawSeries(), sampleWidth() Definition at line 541 of file qwt_plot_multi_barchart.cpp. QList< QwtLegendData > QwtPlotMultiBarChart::legendData () const [override], [virtual] Returns Information to be displayed on the legend The chart is represented by a list of entries - one for each bar title. Each element contains a bar title and an icon showing its corresponding bar. See also barTitles(), legendIcon(), legendIconSize() Reimplemented from QwtPlotItem. Definition at line 687 of file qwt_plot_multi_barchart.cpp. QwtGraphic QwtPlotMultiBarChart::legendIcon (int index, const QSizeF & size) const [override], [virtual] Returns Icon for representing a bar on the legend Parameters index Index of the bar size Icon size Returns An icon showing a bar See also drawBar(), legendData() Reimplemented from QwtPlotItem. Definition at line 720 of file qwt_plot_multi_barchart.cpp. void QwtPlotMultiBarChart::resetSymbolMap () Remove all symbols from the symbol map Definition at line 237 of file qwt_plot_multi_barchart.cpp. int QwtPlotMultiBarChart::rtti () const [override], [virtual] Returns QwtPlotItem::Rtti_PlotBarChart Reimplemented from QwtPlotItem. Definition at line 82 of file qwt_plot_multi_barchart.cpp. void QwtPlotMultiBarChart::setBarTitles (const QList< QwtText > & titles) Set the titles for the bars. The titles are used for the legend. Parameters titles Bar titles See also barTitles(), legendData() Definition at line 138 of file qwt_plot_multi_barchart.cpp. void QwtPlotMultiBarChart::setSamples (const QVector< QVector< double > > & samples) Initialize data with an array of samples. Parameters samples Vector of points Definition at line 101 of file qwt_plot_multi_barchart.cpp. void QwtPlotMultiBarChart::setSamples (const QVector< QwtSetSample > & samples) Initialize data with an array of samples. Parameters samples Vector of points Definition at line 91 of file qwt_plot_multi_barchart.cpp. void QwtPlotMultiBarChart::setSamples (QwtSeriesData< QwtSetSample > * data) Assign a series of samples setSamples() is just a wrapper for setData() without any additional value - beside that it is easier to find for the developer. Parameters data Data Warning The item takes ownership of the data object, deleting it when its not used anymore. Definition at line 123 of file qwt_plot_multi_barchart.cpp. void QwtPlotMultiBarChart::setStyle (ChartStyle style) Set the style of the chart Parameters style Chart style See also style() Definition at line 278 of file qwt_plot_multi_barchart.cpp. void QwtPlotMultiBarChart::setSymbol (int valueIndex, QwtColumnSymbol * symbol) Add a symbol to the symbol map. Assign a default symbol for drawing the bar representing all values with the same index in a set. Parameters valueIndex Index of a value in a set symbol Symbol used for drawing a bar See also symbol(), resetSymbolMap(), specialSymbol() Definition at line 164 of file qwt_plot_multi_barchart.cpp. QwtColumnSymbol * QwtPlotMultiBarChart::specialSymbol (int sampleIndex, int valueIndex) const [protected], [virtual] Create a symbol for special values. Usually the symbols for displaying a bar are set by setSymbols() and common for all sets. By overloading specialSymbol() it is possible to create a temporary symbol() for displaying a special value. The symbol has to be created by new each time specialSymbol() is called. As soon as the symbol is painted this symbol gets deleted. When no symbol ( NULL ) is returned, the value will be displayed with the standard symbol that is used for all symbols with the same valueIndex. Parameters sampleIndex Index of the sample valueIndex Index of the value in the set Returns NULL, meaning that the value is not special Definition at line 263 of file qwt_plot_multi_barchart.cpp. QwtPlotMultiBarChart::ChartStyle QwtPlotMultiBarChart::style () const Returns Style of the chart See also setStyle() Definition at line 293 of file qwt_plot_multi_barchart.cpp. QwtColumnSymbol * QwtPlotMultiBarChart::symbol (int valueIndex) [protected] Find a symbol in the symbol map Parameters valueIndex Index of a value in a set Returns The symbol, that had been set by setSymbol() or NULL. See also setSymbol(), specialSymbol(), drawBar() Definition at line 226 of file qwt_plot_multi_barchart.cpp. const QwtColumnSymbol * QwtPlotMultiBarChart::symbol (int valueIndex) const Find a symbol in the symbol map Parameters valueIndex Index of a value in a set Returns The symbol, that had been set by setSymbol() or NULL. See also setSymbol(), specialSymbol(), drawBar() Definition at line 210 of file qwt_plot_multi_barchart.cpp. Author Generated automatically by Doxygen for Qwt User's Guide from the source code. Version 6.2.0 Sun Jul 18 2021 QwtPlotMultiBarChart(3)