QwtPlotMultiBarChart displays a series of a samples that consist each of a set of values. More...

#include <qwt_plot_multi_barchart.h>

Inheritance diagram for QwtPlotMultiBarChart:

[legend]

Classes
class	PrivateData

Public Types
enum	ChartStyle { Grouped, Stacked }
	Chart styles. More...

Public Types inherited from QwtPlotAbstractBarChart
enum	LayoutPolicy { AutoAdjustSamples, ScaleSamplesToAxes, ScaleSampleToCanvas, FixedSampleSize }
	Mode how to calculate the bar width. More...

Public Types inherited from QwtPlotItem
enum	ItemAttribute { Legend = 0x01, AutoScale = 0x02, Margins = 0x04 }
	Plot Item Attributes. More...

typedef QFlags< ItemAttribute >	ItemAttributes
	Plot Item Attributes. More...

enum	ItemInterest { ScaleInterest = 0x01, LegendInterest = 0x02 }
	Plot Item Interests. More...

typedef QFlags< ItemInterest >	ItemInterests
	Plot Item Interests. More...

enum	RenderHint { RenderAntialiased = 0x1 }
	Render hints. More...

typedef QFlags< RenderHint >	RenderHints
	Render hints. More...

enum	RttiValues { Rtti_PlotItem = 0, Rtti_PlotGrid, Rtti_PlotScale, Rtti_PlotLegend, Rtti_PlotMarker, Rtti_PlotCurve, Rtti_PlotSpectroCurve, Rtti_PlotIntervalCurve, Rtti_PlotHistogram, Rtti_PlotSpectrogram, Rtti_PlotSVG, Rtti_PlotTradingCurve, Rtti_PlotBarChart, Rtti_PlotMultiBarChart, Rtti_PlotShape, Rtti_PlotTextLabel, Rtti_PlotZone, Rtti_PlotUserItem = 1000 }
	Runtime type information. More...

Public Member Functions
QList< QwtText >	barTitles () const

virtual QRectF	boundingRect () const

virtual void	drawSeries (QPainter *painter, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const

virtual QList< QwtLegendData >	legendData () const

virtual QwtGraphic	legendIcon (int index, const QSizeF &) const

	QwtPlotMultiBarChart (const QString &title=QString())

	QwtPlotMultiBarChart (const QwtText &title)

void	resetSymbolMap ()

virtual int	rtti () const

void	setBarTitles (const QList< QwtText > &)
	Set the titles for the bars. More...

void	setSamples (const QVector< QwtSetSample > &)

void	setSamples (const QVector< QVector< double > > &)

void	setSamples (QwtSeriesData< QwtSetSample > *)

void	setStyle (ChartStyle style)

void	setSymbol (int barIndex, QwtColumnSymbol *symbol)
	Add a symbol to the symbol map. More...

ChartStyle	style () const

const QwtColumnSymbol *	symbol (int barIndex) const

virtual	~QwtPlotMultiBarChart ()
	Destructor. More...

Public Member Functions inherited from QwtPlotAbstractBarChart
double	baseline () const

virtual void	getCanvasMarginHint (const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, double &left, double &top, double &right, double &bottom) const
	Calculate a hint for the canvas margin. More...

double	layoutHint () const

LayoutPolicy	layoutPolicy () const

int	margin () const

	QwtPlotAbstractBarChart (const QwtText &title)

void	setBaseline (double)
	Set the baseline. More...

void	setLayoutHint (double)

void	setLayoutPolicy (LayoutPolicy)

void	setMargin (int)
	Set the margin. More...

void	setSpacing (int)
	Set the spacing. More...

int	spacing () const

virtual	~QwtPlotAbstractBarChart ()
	Destructor. More...

Public Member Functions inherited from QwtPlotSeriesItem
virtual void	draw (QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &) const
	Draw the complete series. More...

Qt::Orientation	orientation () const

	QwtPlotSeriesItem (const QString &title=QString())

	QwtPlotSeriesItem (const QwtText &title)

void	setOrientation (Qt::Orientation)

virtual void	updateScaleDiv (const QwtScaleDiv &, const QwtScaleDiv &)
	Update the item to changes of the axes scale division. More...

virtual	~QwtPlotSeriesItem ()
	Destructor. More...

Public Member Functions inherited from QwtPlotItem
void	attach (QwtPlot *plot)
	Attach the item to a plot. More...

void	detach ()
	This method detaches a QwtPlotItem from any QwtPlot it has been associated with. More...

void	hide ()
	Hide the item. More...

bool	isVisible () const

virtual void	itemChanged ()

virtual void	legendChanged ()

QSize	legendIconSize () const

QRectF	paintRect (const QwtScaleMap &, const QwtScaleMap &) const
	Calculate the bounding paint rectangle of 2 maps. More...

QwtPlot *	plot () const
	Return attached plot. More...

	QwtPlotItem (const QwtText &title=QwtText())

uint	renderThreadCount () const

QRectF	scaleRect (const QwtScaleMap &, const QwtScaleMap &) const
	Calculate the bounding scale rectangle of 2 maps. More...

void	setAxes (int xAxis, int yAxis)

void	setItemAttribute (ItemAttribute, bool on=true)

void	setItemInterest (ItemInterest, bool on=true)

void	setLegendIconSize (const QSize &)

void	setRenderHint (RenderHint, bool on=true)

void	setRenderThreadCount (uint numThreads)

void	setTitle (const QString &title)

void	setTitle (const QwtText &title)

virtual void	setVisible (bool)

void	setXAxis (int axis)

void	setYAxis (int axis)

void	setZ (double z)
	Set the z value. More...

void	show ()
	Show the item. More...

bool	testItemAttribute (ItemAttribute) const

bool	testItemInterest (ItemInterest) const

bool	testRenderHint (RenderHint) const

const QwtText &	title () const

virtual void	updateLegend (const QwtPlotItem *, const QList< QwtLegendData > &)
	Update the item to changes of the legend info. More...

int	xAxis () const
	Return xAxis. More...

int	yAxis () const
	Return yAxis. More...

double	z () const

virtual	~QwtPlotItem ()
	Destroy the QwtPlotItem. More...

Public Member Functions inherited from QwtSeriesStore< QwtSetSample >
QwtSeriesData< QwtSetSample > *	data ()

const QwtSeriesData< QwtSetSample > *	data () const

virtual QRectF	dataRect () const

virtual size_t	dataSize () const

	QwtSeriesStore ()
	Constructor The store contains no series. More...

QwtSetSample	sample (int index) const

void	setData (QwtSeriesData< QwtSetSample > *series)

virtual void	setRectOfInterest (const QRectF &rect)

QwtSeriesData< QwtSetSample > *	swapData (QwtSeriesData< QwtSetSample > *series)

	~QwtSeriesStore ()
	Destructor. More...

Protected Member Functions
virtual void	drawBar (QPainter *, int sampleIndex, int barIndex, const QwtColumnRect &) const

void	drawGroupedBars (QPainter *painter, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int index, double sampleWidth, const QwtSetSample &sample) const

virtual void	drawSample (QPainter *painter, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, const QwtInterval &boundingInterval, int index, const QwtSetSample &sample) const

void	drawStackedBars (QPainter *painter, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int index, double sampleWidth, const QwtSetSample &sample) const

virtual QwtColumnSymbol *	specialSymbol (int sampleIndex, int valueIndex) const
	Create a symbol for special values. More...

QwtColumnSymbol *	symbol (int barIndex)

Protected Member Functions inherited from QwtPlotAbstractBarChart
double	sampleWidth (const QwtScaleMap &map, double canvasSize, double dataSize, double value) const

Protected Member Functions inherited from QwtPlotSeriesItem
virtual void	dataChanged ()
	dataChanged() indicates, that the series has been changed. More...

Protected Member Functions inherited from QwtPlotItem
QwtGraphic	defaultIcon (const QBrush &, const QSizeF &) const
	Return a default icon from a brush. More...

Protected Member Functions inherited from QwtAbstractSeriesStore
virtual	~QwtAbstractSeriesStore ()
	Destructor. More...

Private Member Functions
void	init ()

Private Attributes
PrivateData *	d_data

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 51 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 60 of file qwt_plot_multi_barchart.cpp.

QwtPlotMultiBarChart::QwtPlotMultiBarChart ( const QwtText & title )

explicit

Constructor

Parameters

title Title of the chart

Definition at line 50 of file qwt_plot_multi_barchart.cpp.

QwtPlotMultiBarChart::~QwtPlotMultiBarChart ( )

virtual

Destructor.

Definition at line 67 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 146 of file qwt_plot_multi_barchart.cpp.

QRectF QwtPlotMultiBarChart::boundingRect ( ) const

virtual

Returns: Bounding rectangle of all samples. For an empty series the rectangle is invalid.

Reimplemented from QwtPlotSeriesItem.

Definition at line 300 of file qwt_plot_multi_barchart.cpp.

void QwtPlotMultiBarChart::drawBar	(	QPainter *	painter,
		int	sampleIndex,
		int	valueIndex,
		const QwtColumnRect &	rect
	)		const

protectedvirtual

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 651 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	Boundng width for all bars of the smaple
sample	Sample

See also: drawSeries(), sampleWidth()

Definition at line 459 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

protectedvirtual

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 413 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

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 372 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 539 of file qwt_plot_multi_barchart.cpp.

void QwtPlotMultiBarChart::init ( )

private

Definition at line 73 of file qwt_plot_multi_barchart.cpp.

QList< QwtLegendData > QwtPlotMultiBarChart::legendData ( ) const

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 686 of file qwt_plot_multi_barchart.cpp.

QwtGraphic QwtPlotMultiBarChart::legendIcon	(	int	index,
		const QSizeF &	size
	)		const

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 725 of file qwt_plot_multi_barchart.cpp.

void QwtPlotMultiBarChart::resetSymbolMap ( )

Remove all symbols from the symbol map

Definition at line 235 of file qwt_plot_multi_barchart.cpp.

int QwtPlotMultiBarChart::rtti ( ) const

virtual

Returns: QwtPlotItem::Rtti_PlotBarChart

Reimplemented from QwtPlotItem.

Definition at line 80 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 136 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 89 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 99 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 121 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 276 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 162 of file qwt_plot_multi_barchart.cpp.

QwtColumnSymbol * QwtPlotMultiBarChart::specialSymbol	(	int	sampleIndex,
		int	valueIndex
	)		const

protectedvirtual

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