Classes | Public Types | Public Member Functions | Protected Member Functions | Private Attributes | List of all members
QwtPlotAbstractBarChart Class Reference

Abstract base class for bar chart items. More...

#include <qwt_plot_abstract_barchart.h>

Inheritance diagram for QwtPlotAbstractBarChart:
Inheritance graph
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Classes

class  PrivateData
 

Public Types

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< ItemAttributeItemAttributes
 Plot Item Attributes. More...
 
enum  ItemInterest { ScaleInterest = 0x01, LegendInterest = 0x02 }
 Plot Item Interests. More...
 
typedef QFlags< ItemInterestItemInterests
 Plot Item Interests. More...
 
enum  RenderHint { RenderAntialiased = 0x1 }
 Render hints. More...
 
typedef QFlags< RenderHintRenderHints
 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

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 QRectF boundingRect () const
 
virtual void draw (QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &) const
 Draw the complete series. More...
 
virtual void drawSeries (QPainter *painter, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const =0
 
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 ()
 
virtual QList< QwtLegendDatalegendData () const
 Return all information, that is needed to represent the item on the legend. More...
 
virtual QwtGraphic legendIcon (int index, const QSizeF &) const
 
QSize legendIconSize () const
 
QRectF paintRect (const QwtScaleMap &, const QwtScaleMap &) const
 Calculate the bounding paint rectangle of 2 maps. More...
 
QwtPlotplot () const
 Return attached plot. More...
 
 QwtPlotItem (const QwtText &title=QwtText())
 
uint renderThreadCount () const
 
virtual int rtti () 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 QwtTexttitle () 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...
 

Protected Member Functions

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 QRectF dataRect () const =0
 
virtual size_t dataSize () const =0
 
virtual void setRectOfInterest (const QRectF &)=0
 
virtual ~QwtAbstractSeriesStore ()
 Destructor. More...
 

Private Attributes

PrivateDatad_data
 

Detailed Description

Abstract base class for bar chart items.

In opposite to almost all other plot items bar charts can't be displayed inside of their bounding rectangle and need a special API how to calculate the width of the bars and how they affect the layout of the attached plot.

Definition at line 25 of file qwt_plot_abstract_barchart.h.

Member Enumeration Documentation

Mode how to calculate the bar width.

setLayoutPolicy(), setLayoutHint(), barWidthHint()

Enumerator
AutoAdjustSamples 

The sample width is calculated by dividing the bounding rectangle by the number of samples. The layoutHint() is used as a minimum width in paint device coordinates.

See also
boundingRectangle()
ScaleSamplesToAxes 

layoutHint() defines an interval in axis coordinates

ScaleSampleToCanvas 

The bar width is calculated by multiplying layoutHint() with the height or width of the canvas.

See also
boundingRectangle()
FixedSampleSize 

layoutHint() defines a fixed width in paint device coordinates.

Definition at line 33 of file qwt_plot_abstract_barchart.h.

Constructor & Destructor Documentation

QwtPlotAbstractBarChart::QwtPlotAbstractBarChart ( const QwtText title)
explicit

Constructor

Parameters
titleTitle of the chart

Definition at line 47 of file qwt_plot_abstract_barchart.cpp.

QwtPlotAbstractBarChart::~QwtPlotAbstractBarChart ( )
virtual

Destructor.

Definition at line 59 of file qwt_plot_abstract_barchart.cpp.

Member Function Documentation

double QwtPlotAbstractBarChart::baseline ( ) const
Returns
Value for the origin of the bar chart
See also
setBaseline(), QwtPlotSeriesItem::orientation()

Definition at line 207 of file qwt_plot_abstract_barchart.cpp.

void QwtPlotAbstractBarChart::getCanvasMarginHint ( const QwtScaleMap xMap,
const QwtScaleMap yMap,
const QRectF &  canvasRect,
double &  left,
double &  top,
double &  right,
double &  bottom 
) const
virtual

Calculate a hint for the canvas margin.

Bar charts need to reserve some space for displaying the bars for the first and the last sample. The hint is calculated from the layoutHint() depending on the layoutPolicy().

The margins are in target device coordinates ( pixels on screen )

Parameters
xMapMaps x-values into pixel coordinates.
yMapMaps y-values into pixel coordinates.
canvasRectContents rectangle of the canvas in painter coordinates
leftReturns the left margin
topReturns the top margin
rightReturns the right margin
bottomReturns the bottom margin
Returns
Margin
See also
layoutPolicy(), layoutHint(), QwtPlotItem::Margins QwtPlot::getCanvasMarginsHint(), QwtPlot::updateCanvasMargins()

Reimplemented from QwtPlotItem.

Definition at line 288 of file qwt_plot_abstract_barchart.cpp.

double QwtPlotAbstractBarChart::layoutHint ( ) const

The combination of layoutPolicy() and layoutHint() define how the width of the bars is calculated

Returns
Layout policy of the chart item
See also
LayoutPolicy, setLayoutHint(), layoutPolicy()

Definition at line 118 of file qwt_plot_abstract_barchart.cpp.

QwtPlotAbstractBarChart::LayoutPolicy QwtPlotAbstractBarChart::layoutPolicy ( ) const

The combination of layoutPolicy() and layoutHint() define how the width of the bars is calculated

Returns
Layout policy of the chart item
See also
setLayoutPolicy(), layoutHint()

Definition at line 88 of file qwt_plot_abstract_barchart.cpp.

int QwtPlotAbstractBarChart::margin ( ) const
Returns
Margin between the outmost bars and the contentsRect() of the canvas.
See also
setMargin(), spacing()

Definition at line 175 of file qwt_plot_abstract_barchart.cpp.

double QwtPlotAbstractBarChart::sampleWidth ( const QwtScaleMap map,
double  canvasSize,
double  boundingSize,
double  value 
) const
protected

Calculate the width for a sample in paint device coordinates

Parameters
mapScale map for the corresponding scale
canvasSizeSize of the canvas in paint device coordinates
boundingSizeBounding size of the chart in plot coordinates ( used in AutoAdjustSamples mode )
valueValue of the sample
Returns
Sample width
See also
layoutPolicy(), layoutHint()

Definition at line 224 of file qwt_plot_abstract_barchart.cpp.

void QwtPlotAbstractBarChart::setBaseline ( double  value)

Set the baseline.

The baseline is the origin for the chart. Each bar is painted from the baseline in the direction of the sample value. In case of a horizontal orientation() the baseline is interpreted as x - otherwise as y - value.

The default value for the baseline is 0.

Parameters
valueValue for the baseline
See also
baseline(), QwtPlotSeriesItem::orientation()

Definition at line 194 of file qwt_plot_abstract_barchart.cpp.

void QwtPlotAbstractBarChart::setLayoutHint ( double  hint)

The combination of layoutPolicy() and layoutHint() define how the width of the bars is calculated

Parameters
hintLayout hint
See also
LayoutPolicy, layoutPolicy(), layoutHint()

Definition at line 101 of file qwt_plot_abstract_barchart.cpp.

void QwtPlotAbstractBarChart::setLayoutPolicy ( LayoutPolicy  policy)

The combination of layoutPolicy() and layoutHint() define how the width of the bars is calculated

Parameters
policyLayout policy
See also
layoutPolicy(), layoutHint()

Definition at line 72 of file qwt_plot_abstract_barchart.cpp.

void QwtPlotAbstractBarChart::setMargin ( int  margin)

Set the margin.

The margin is the distance between the outmost bars and the contentsRect() of the canvas. The default setting is 5 pixels.

Parameters
marginMargin
See also
spacing(), margin()

Definition at line 159 of file qwt_plot_abstract_barchart.cpp.

void QwtPlotAbstractBarChart::setSpacing ( int  spacing)

Set the spacing.

The spacing is the distance between 2 samples ( bars for QwtPlotBarChart or a group of bars for QwtPlotMultiBarChart ) in paint device coordinates.

See also
spacing()

Definition at line 131 of file qwt_plot_abstract_barchart.cpp.

int QwtPlotAbstractBarChart::spacing ( ) const
Returns
Spacing between 2 samples ( bars or groups of bars )
See also
setSpacing(), margin()

Definition at line 145 of file qwt_plot_abstract_barchart.cpp.

Member Data Documentation

PrivateData* QwtPlotAbstractBarChart::d_data
private

Definition at line 93 of file qwt_plot_abstract_barchart.h.


The documentation for this class was generated from the following files:


plotjuggler
Author(s): Davide Faconti
autogenerated on Sat Jul 6 2019 03:44:18