.TH "QwtPlotMultiBarChart" 3 "Wed Jan 2 2019" "Version 6.1.4" "Qwt User's Guide" \" -*- nroff -*-
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.SH NAME
QwtPlotMultiBarChart \- \fBQwtPlotMultiBarChart\fP displays a series of a samples that consist each of a set of values\&.  

.SH SYNOPSIS
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.PP
.PP
\fC#include <qwt_plot_multi_barchart\&.h>\fP
.PP
Inherits \fBQwtPlotAbstractBarChart\fP, and \fBQwtSeriesStore< QwtSetSample >\fP\&.
.SS "Public Types"

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.RI "enum \fBChartStyle\fP { \fBGrouped\fP, \fBStacked\fP }"
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.RI "Chart styles\&. "
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.SS "Public Member Functions"

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.RI "\fBQwtPlotMultiBarChart\fP (const QString &\fBtitle\fP=QString())"
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.RI "\fBQwtPlotMultiBarChart\fP (const \fBQwtText\fP &\fBtitle\fP)"
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.RI "virtual \fB~QwtPlotMultiBarChart\fP ()"
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.RI "Destructor\&. "
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.RI "virtual int \fBrtti\fP () const"
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.RI "void \fBsetBarTitles\fP (const QList< \fBQwtText\fP > &)"
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.RI "Set the titles for the bars\&. "
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.RI "QList< \fBQwtText\fP > \fBbarTitles\fP () const"
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.RI "void \fBsetSamples\fP (const QVector< \fBQwtSetSample\fP > &)"
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.RI "void \fBsetSamples\fP (const QVector< QVector< double > > &)"
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.RI "void \fBsetSamples\fP (\fBQwtSeriesData\fP< \fBQwtSetSample\fP > *)"
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.RI "void \fBsetStyle\fP (\fBChartStyle\fP \fBstyle\fP)"
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.RI "\fBChartStyle\fP \fBstyle\fP () const"
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.RI "void \fBsetSymbol\fP (int valueIndex, \fBQwtColumnSymbol\fP *)"
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.RI "Add a symbol to the symbol map\&. "
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.RI "const \fBQwtColumnSymbol\fP * \fBsymbol\fP (int valueIndex) const"
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.RI "void \fBresetSymbolMap\fP ()"
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.RI "virtual void \fBdrawSeries\fP (QPainter *painter, const \fBQwtScaleMap\fP &xMap, const \fBQwtScaleMap\fP &yMap, const QRectF &canvasRect, int from, int to) const"
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.RI "virtual QRectF \fBboundingRect\fP () const"
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.RI "virtual QList< \fBQwtLegendData\fP > \fBlegendData\fP () const"
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.RI "virtual \fBQwtGraphic\fP \fBlegendIcon\fP (int index, const QSizeF &) const"
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.SS "Protected Member Functions"

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.RI "\fBQwtColumnSymbol\fP * \fBsymbol\fP (int valueIndex)"
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.RI "virtual \fBQwtColumnSymbol\fP * \fBspecialSymbol\fP (int sampleIndex, int valueIndex) const"
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.RI "Create a symbol for special values\&. "
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.RI "virtual void \fBdrawSample\fP (QPainter *painter, const \fBQwtScaleMap\fP &xMap, const \fBQwtScaleMap\fP &yMap, const QRectF &canvasRect, const \fBQwtInterval\fP &boundingInterval, int index, const \fBQwtSetSample\fP &\fBsample\fP) const"
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.RI "virtual void \fBdrawBar\fP (QPainter *, int sampleIndex, int valueIndex, const \fBQwtColumnRect\fP &) const"
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.RI "void \fBdrawStackedBars\fP (QPainter *painter, const \fBQwtScaleMap\fP &xMap, const \fBQwtScaleMap\fP &yMap, const QRectF &canvasRect, int index, double \fBsampleWidth\fP, const \fBQwtSetSample\fP &\fBsample\fP) const"
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.RI "void \fBdrawGroupedBars\fP (QPainter *painter, const \fBQwtScaleMap\fP &xMap, const \fBQwtScaleMap\fP &yMap, const QRectF &canvasRect, int index, double \fBsampleWidth\fP, const \fBQwtSetSample\fP &\fBsample\fP) const"
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.SH "Detailed Description"
.PP 
\fBQwtPlotMultiBarChart\fP 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\&.
.PP
Each bar of a set is rendered by a \fBQwtColumnSymbol\fP, that is set by \fBsetSymbol()\fP\&. The bars of different sets use the same symbols\&. Exceptions are possible by overloading \fBspecialSymbol()\fP or overloading \fBdrawBar()\fP\&.
.PP
Depending on its \fBorientation()\fP the bars are displayed horizontally or vertically\&. The bars cover the interval between the \fBbaseline()\fP and the value\&.
.PP
In opposite to most other plot items, \fBQwtPlotMultiBarChart\fP returns more than one entry for the legend - one for each symbol\&.
.PP
\fBSee also:\fP
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\fBQwtPlotBarChart\fP, \fBQwtPlotHistogram\fP \fBQwtPlotSeriesItem::orientation()\fP, \fBQwtPlotAbstractBarChart::baseline()\fP 
.RE
.PP

.SH "Member Enumeration Documentation"
.PP 
.SS "enum \fBQwtPlotMultiBarChart::ChartStyle\fP"

.PP
Chart styles\&. The default setting is \fBQwtPlotMultiBarChart::Grouped\fP\&. 
.PP
\fBSee also:\fP
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\fBsetStyle()\fP, \fBstyle()\fP 
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.PP

.PP
\fBEnumerator\fP
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.TP
\fB\fIGrouped \fP\fP
The bars of a set are displayed side by side\&. 
.TP
\fB\fIStacked \fP\fP
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\&. 
.SH "Constructor & Destructor Documentation"
.PP 
.SS "QwtPlotMultiBarChart::QwtPlotMultiBarChart (const QString & title = \fCQString()\fP)\fC [explicit]\fP"
Constructor 
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\fBParameters:\fP
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\fItitle\fP Title of the chart 
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.SS "QwtPlotMultiBarChart::QwtPlotMultiBarChart (const \fBQwtText\fP & title)\fC [explicit]\fP"
Constructor 
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\fBParameters:\fP
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\fItitle\fP Title of the chart 
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.SH "Member Function Documentation"
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.SS "QList< \fBQwtText\fP > QwtPlotMultiBarChart::barTitles () const"

.PP
\fBReturns:\fP
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Bar titles 
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\fBSee also:\fP
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\fBsetBarTitles()\fP, \fBlegendData()\fP 
.RE
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.SS "QRectF QwtPlotMultiBarChart::boundingRect () const\fC [virtual]\fP"

.PP
\fBReturns:\fP
.RS 4
Bounding rectangle of all samples\&. For an empty series the rectangle is invalid\&. 
.RE
.PP

.PP
Reimplemented from \fBQwtPlotSeriesItem\fP\&.
.SS "void QwtPlotMultiBarChart::drawBar (QPainter * painter, int sampleIndex, int valueIndex, const \fBQwtColumnRect\fP & rect) const\fC [protected]\fP, \fC [virtual]\fP"
Draw a bar
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\fBParameters:\fP
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\fIpainter\fP Painter 
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\fIsampleIndex\fP Index of the sample - might be -1 when the bar is painted for the legend 
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\fIvalueIndex\fP Index of a value in a set 
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\fIrect\fP Directed target rectangle for the bar
.RE
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\fBSee also:\fP
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\fBdrawSeries()\fP 
.RE
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.SS "void QwtPlotMultiBarChart::drawGroupedBars (QPainter * painter, const \fBQwtScaleMap\fP & xMap, const \fBQwtScaleMap\fP & yMap, const QRectF & canvasRect, int index, double sampleWidth, const \fBQwtSetSample\fP & sample) const\fC [protected]\fP"
Draw a grouped sample
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\fBParameters:\fP
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\fIpainter\fP Painter 
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\fIxMap\fP x map 
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\fIyMap\fP y map 
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\fIcanvasRect\fP Contents rectangle of the canvas 
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\fIindex\fP Index of the sample to be painted 
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\fIsampleWidth\fP Boundng width for all bars of the smaple 
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\fIsample\fP Sample
.RE
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\fBSee also:\fP
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\fBdrawSeries()\fP, \fBsampleWidth()\fP 
.RE
.PP

.SS "void QwtPlotMultiBarChart::drawSample (QPainter * painter, const \fBQwtScaleMap\fP & xMap, const \fBQwtScaleMap\fP & yMap, const QRectF & canvasRect, const \fBQwtInterval\fP & boundingInterval, int index, const \fBQwtSetSample\fP & sample) const\fC [protected]\fP, \fC [virtual]\fP"
Draw a sample
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\fBParameters:\fP
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\fIpainter\fP Painter 
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\fIxMap\fP x map 
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\fIyMap\fP y map 
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\fIcanvasRect\fP Contents rectangle of the canvas 
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\fIboundingInterval\fP Bounding interval of sample values 
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\fIindex\fP Index of the sample to be painted 
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\fIsample\fP Sample value
.RE
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\fBSee also:\fP
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\fBdrawSeries()\fP 
.RE
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.SS "void QwtPlotMultiBarChart::drawSeries (QPainter * painter, const \fBQwtScaleMap\fP & xMap, const \fBQwtScaleMap\fP & yMap, const QRectF & canvasRect, int from, int to) const\fC [virtual]\fP"
Draw an interval of the bar chart
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\fBParameters:\fP
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\fIpainter\fP Painter 
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\fIxMap\fP Maps x-values into pixel coordinates\&. 
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\fIyMap\fP Maps y-values into pixel coordinates\&. 
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\fIcanvasRect\fP Contents rectangle of the canvas 
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\fIfrom\fP Index of the first point to be painted 
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\fIto\fP Index of the last point to be painted\&. If to < 0 the curve will be painted to its last point\&.
.RE
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\fBSee also:\fP
.RS 4
drawSymbols() 
.RE
.PP

.PP
Implements \fBQwtPlotSeriesItem\fP\&.
.SS "void QwtPlotMultiBarChart::drawStackedBars (QPainter * painter, const \fBQwtScaleMap\fP & xMap, const \fBQwtScaleMap\fP & yMap, const QRectF & canvasRect, int index, double sampleWidth, const \fBQwtSetSample\fP & sample) const\fC [protected]\fP"
Draw a stacked sample
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\fBParameters:\fP
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\fIpainter\fP Painter 
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\fIxMap\fP x map 
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\fIyMap\fP y map 
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\fIcanvasRect\fP Contents rectangle of the canvas 
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\fIindex\fP Index of the sample to be painted 
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\fIsampleWidth\fP Width of the bars 
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\fIsample\fP Sample
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\fBSee also:\fP
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\fBdrawSeries()\fP, \fBsampleWidth()\fP 
.RE
.PP

.SS "QList< \fBQwtLegendData\fP > QwtPlotMultiBarChart::legendData () const\fC [virtual]\fP"

.PP
\fBReturns:\fP
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Information to be displayed on the legend
.RE
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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\&.
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\fBSee also:\fP
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\fBbarTitles()\fP, \fBlegendIcon()\fP, \fBlegendIconSize()\fP 
.RE
.PP

.PP
Reimplemented from \fBQwtPlotItem\fP\&.
.SS "\fBQwtGraphic\fP QwtPlotMultiBarChart::legendIcon (int index, const QSizeF & size) const\fC [virtual]\fP"

.PP
\fBReturns:\fP
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Icon for representing a bar on the legend
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\fBParameters:\fP
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\fIindex\fP Index of the bar 
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\fIsize\fP Icon size
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\fBReturns:\fP
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An icon showing a bar 
.RE
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\fBSee also:\fP
.RS 4
\fBdrawBar()\fP, \fBlegendData()\fP 
.RE
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.PP
Reimplemented from \fBQwtPlotItem\fP\&.
.SS "void QwtPlotMultiBarChart::resetSymbolMap ()"
Remove all symbols from the symbol map 
.SS "int QwtPlotMultiBarChart::rtti () const\fC [virtual]\fP"

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\fBReturns:\fP
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\fBQwtPlotItem::Rtti_PlotBarChart\fP 
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.PP

.PP
Reimplemented from \fBQwtPlotItem\fP\&.
.SS "void QwtPlotMultiBarChart::setBarTitles (const QList< \fBQwtText\fP > & titles)"

.PP
Set the titles for the bars\&. The titles are used for the legend\&.
.PP
\fBParameters:\fP
.RS 4
\fItitles\fP Bar titles
.RE
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\fBSee also:\fP
.RS 4
\fBbarTitles()\fP, \fBlegendData()\fP 
.RE
.PP

.SS "void QwtPlotMultiBarChart::setSamples (const QVector< \fBQwtSetSample\fP > & samples)"
Initialize data with an array of samples\&. 
.PP
\fBParameters:\fP
.RS 4
\fIsamples\fP Vector of points 
.RE
.PP

.SS "void QwtPlotMultiBarChart::setSamples (const QVector< QVector< double > > & samples)"
Initialize data with an array of samples\&. 
.PP
\fBParameters:\fP
.RS 4
\fIsamples\fP Vector of points 
.RE
.PP

.SS "void QwtPlotMultiBarChart::setSamples (\fBQwtSeriesData\fP< \fBQwtSetSample\fP > * data)"
Assign a series of samples
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\fBsetSamples()\fP is just a wrapper for \fBsetData()\fP without any additional value - beside that it is easier to find for the developer\&.
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\fBParameters:\fP
.RS 4
\fIdata\fP Data 
.RE
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\fBWarning:\fP
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The item takes ownership of the data object, deleting it when its not used anymore\&. 
.RE
.PP

.SS "void QwtPlotMultiBarChart::setStyle (\fBChartStyle\fP style)"
Set the style of the chart
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\fBParameters:\fP
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\fIstyle\fP Chart style 
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\fBSee also:\fP
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\fBstyle()\fP 
.RE
.PP

.SS "void QwtPlotMultiBarChart::setSymbol (int valueIndex, \fBQwtColumnSymbol\fP * symbol)"

.PP
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\&.
.PP
\fBParameters:\fP
.RS 4
\fIvalueIndex\fP Index of a value in a set 
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\fIsymbol\fP Symbol used for drawing a bar
.RE
.PP
\fBSee also:\fP
.RS 4
\fBsymbol()\fP, \fBresetSymbolMap()\fP, \fBspecialSymbol()\fP 
.RE
.PP

.SS "\fBQwtColumnSymbol\fP * QwtPlotMultiBarChart::specialSymbol (int sampleIndex, int valueIndex) const\fC [protected]\fP, \fC [virtual]\fP"

.PP
Create a symbol for special values\&. Usually the symbols for displaying a bar are set by setSymbols() and common for all sets\&. By overloading \fBspecialSymbol()\fP it is possible to create a temporary \fBsymbol()\fP for displaying a special value\&.
.PP
The symbol has to be created by new each time \fBspecialSymbol()\fP is called\&. As soon as the symbol is painted this symbol gets deleted\&.
.PP
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\&.
.PP
\fBParameters:\fP
.RS 4
\fIsampleIndex\fP Index of the sample 
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\fIvalueIndex\fP Index of the value in the set
.RE
.PP
\fBReturns:\fP
.RS 4
NULL, meaning that the value is not special 
.RE
.PP

.SS "\fBQwtPlotMultiBarChart::ChartStyle\fP QwtPlotMultiBarChart::style () const"

.PP
\fBReturns:\fP
.RS 4
Style of the chart 
.RE
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\fBSee also:\fP
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\fBsetStyle()\fP 
.RE
.PP

.SS "const \fBQwtColumnSymbol\fP * QwtPlotMultiBarChart::symbol (int valueIndex) const"
Find a symbol in the symbol map
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\fBParameters:\fP
.RS 4
\fIvalueIndex\fP Index of a value in a set 
.RE
.PP
\fBReturns:\fP
.RS 4
The symbol, that had been set by \fBsetSymbol()\fP or NULL\&.
.RE
.PP
\fBSee also:\fP
.RS 4
\fBsetSymbol()\fP, \fBspecialSymbol()\fP, \fBdrawBar()\fP 
.RE
.PP

.SS "\fBQwtColumnSymbol\fP * QwtPlotMultiBarChart::symbol (int valueIndex)\fC [protected]\fP"
Find a symbol in the symbol map
.PP
\fBParameters:\fP
.RS 4
\fIvalueIndex\fP Index of a value in a set 
.RE
.PP
\fBReturns:\fP
.RS 4
The symbol, that had been set by \fBsetSymbol()\fP or NULL\&.
.RE
.PP
\fBSee also:\fP
.RS 4
\fBsetSymbol()\fP, \fBspecialSymbol()\fP, \fBdrawBar()\fP 
.RE
.PP


.SH "Author"
.PP 
Generated automatically by Doxygen for Qwt User's Guide from the source code\&.