|  | 
| enum | HistogramStyle { Outline, 
Columns, 
Lines, 
UserStyle = 100
 } | 
|  | 
| 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... 
 | 
|  | 
| enum | ItemAttribute { Legend = 0x01, 
AutoScale = 0x02, 
Margins = 0x04
 } | 
|  | Plot Item Attributes.  More... 
 | 
|  | 
| enum | ItemInterest { ScaleInterest = 0x01, 
LegendInterest = 0x02
 } | 
|  | Plot Item Interests.  More... 
 | 
|  | 
| enum | RenderHint { RenderAntialiased = 0x1
 } | 
|  | Render hints.  More... 
 | 
|  | 
| typedef QFlags< ItemAttribute > | ItemAttributes | 
|  | Plot Item Attributes. 
 | 
|  | 
| typedef QFlags< ItemInterest > | ItemInterests | 
|  | Plot Item Interests. 
 | 
|  | 
| typedef QFlags< RenderHint > | RenderHints | 
|  | Render hints. 
 | 
|  | 
|  | 
|  | QwtPlotHistogram (const QString &title=QString::null) | 
|  | 
|  | QwtPlotHistogram (const QwtText &title) | 
|  | 
| virtual | ~QwtPlotHistogram () | 
|  | Destructor. 
 | 
|  | 
| virtual int | rtti () const | 
|  | 
| void | setPen (const QColor &, qreal width=0.0, Qt::PenStyle=Qt::SolidLine) | 
|  | 
| void | setPen (const QPen &) | 
|  | 
| const QPen & | pen () const | 
|  | 
| void | setBrush (const QBrush &) | 
|  | 
| const QBrush & | brush () const | 
|  | 
| void | setSamples (const QVector< QwtIntervalSample > &) | 
|  | 
| void | setSamples (QwtSeriesData< QwtIntervalSample > *) | 
|  | 
| void | setBaseline (double reference) | 
|  | Set the value of the baseline.  More... 
 | 
|  | 
| double | baseline () const | 
|  | 
| void | setStyle (HistogramStyle style) | 
|  | 
| HistogramStyle | style () const | 
|  | 
| void | setSymbol (const QwtColumnSymbol *) | 
|  | Assign a symbol.  More... 
 | 
|  | 
| const QwtColumnSymbol * | symbol () const | 
|  | 
| virtual void | drawSeries (QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const | 
|  | 
| virtual QRectF | boundingRect () const | 
|  | 
| virtual QwtGraphic | legendIcon (int index, const QSizeF &) const | 
|  | 
|  | QwtPlotSeriesItem (const QString &title=QString::null) | 
|  | 
|  | QwtPlotSeriesItem (const QwtText &title) | 
|  | 
| virtual | ~QwtPlotSeriesItem () | 
|  | Destructor. 
 | 
|  | 
| void | setOrientation (Qt::Orientation) | 
|  | 
| Qt::Orientation | orientation () const | 
|  | 
| virtual void | draw (QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &) const | 
|  | Draw the complete series.  More... 
 | 
|  | 
| virtual void | updateScaleDiv (const QwtScaleDiv &, const QwtScaleDiv &) | 
|  | Update the item to changes of the axes scale division.  More... 
 | 
|  | 
|  | QwtPlotItem (const QwtText &title=QwtText()) | 
|  | 
| virtual | ~QwtPlotItem () | 
|  | Destroy the 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... 
 | 
|  | 
| QwtPlot * | plot () const | 
|  | Return attached plot. 
 | 
|  | 
| void | setTitle (const QString &title) | 
|  | 
| void | setTitle (const QwtText &title) | 
|  | 
| const QwtText & | title () const | 
|  | 
| void | setItemAttribute (ItemAttribute, bool on=true) | 
|  | 
| bool | testItemAttribute (ItemAttribute) const | 
|  | 
| void | setItemInterest (ItemInterest, bool on=true) | 
|  | 
| bool | testItemInterest (ItemInterest) const | 
|  | 
| void | setRenderHint (RenderHint, bool on=true) | 
|  | 
| bool | testRenderHint (RenderHint) const | 
|  | 
| void | setRenderThreadCount (uint numThreads) | 
|  | 
| uint | renderThreadCount () const | 
|  | 
| void | setLegendIconSize (const QSize &) | 
|  | 
| QSize | legendIconSize () const | 
|  | 
| double | z () const | 
|  | 
| void | setZ (double z) | 
|  | Set the z value.  More... 
 | 
|  | 
| void | show () | 
|  | Show the item. 
 | 
|  | 
| void | hide () | 
|  | Hide the item. 
 | 
|  | 
| virtual void | setVisible (bool) | 
|  | 
| bool | isVisible () const | 
|  | 
| void | setAxes (int xAxis, int yAxis) | 
|  | 
| void | setXAxis (int axis) | 
|  | 
| int | xAxis () const | 
|  | Return xAxis. 
 | 
|  | 
| void | setYAxis (int axis) | 
|  | 
| int | yAxis () const | 
|  | Return yAxis. 
 | 
|  | 
| virtual void | itemChanged () | 
|  | 
| virtual void | legendChanged () | 
|  | 
| virtual void | getCanvasMarginHint (const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasSize, double &left, double &top, double &right, double &bottom) const | 
|  | Calculate a hint for the canvas margin.  More... 
 | 
|  | 
| virtual void | updateLegend (const QwtPlotItem *, const QList< QwtLegendData > &) | 
|  | Update the item to changes of the legend info.  More... 
 | 
|  | 
| QRectF | scaleRect (const QwtScaleMap &, const QwtScaleMap &) const | 
|  | Calculate the bounding scale rectangle of 2 maps.  More... 
 | 
|  | 
| QRectF | paintRect (const QwtScaleMap &, const QwtScaleMap &) const | 
|  | Calculate the bounding paint rectangle of 2 maps.  More... 
 | 
|  | 
| virtual QList< QwtLegendData > | legendData () const | 
|  | Return all information, that is needed to represent the item on the legend.  More... 
 | 
|  | 
|  | QwtSeriesStore () | 
|  | Constructor The store contains no series. 
 | 
|  | 
|  | ~QwtSeriesStore () | 
|  | Destructor. 
 | 
|  | 
| void | setData (QwtSeriesData< QwtIntervalSample > *series) | 
|  | 
| QwtSeriesData< QwtIntervalSample > * | data () | 
|  | 
| const QwtSeriesData< QwtIntervalSample > * | data () const | 
|  | 
| QwtIntervalSample | sample (int index) const | 
|  | 
| virtual size_t | dataSize () const | 
|  | 
| virtual QRectF | dataRect () const | 
|  | 
| virtual void | setRectOfInterest (const QRectF &rect) | 
|  | 
| QwtSeriesData< QwtIntervalSample > * | swapData (QwtSeriesData< QwtIntervalSample > *series) | 
|  | 
|  | 
| virtual QwtColumnRect | columnRect (const QwtIntervalSample &, const QwtScaleMap &, const QwtScaleMap &) const | 
|  | 
| virtual void | drawColumn (QPainter *, const QwtColumnRect &, const QwtIntervalSample &) const | 
|  | 
| void | drawColumns (QPainter *, const QwtScaleMap &xMap, const QwtScaleMap &yMap, int from, int to) const | 
|  | 
| void | drawOutline (QPainter *, const QwtScaleMap &xMap, const QwtScaleMap &yMap, int from, int to) const | 
|  | 
| void | drawLines (QPainter *, const QwtScaleMap &xMap, const QwtScaleMap &yMap, int from, int to) const | 
|  | 
| virtual void | dataChanged () | 
|  | dataChanged() indicates, that the series has been changed. 
 | 
|  | 
| QwtGraphic | defaultIcon (const QBrush &, const QSizeF &) const | 
|  | Return a default icon from a brush.  More... 
 | 
|  | 
| virtual | ~QwtAbstractSeriesStore () | 
|  | Destructor. 
 | 
|  | 
QwtPlotHistogram represents a series of samples, where an interval is associated with a value ( ![$y = f([x1,x2])$](form_1.png) ).
 ). 
The representation depends on the style() and an optional symbol() that is displayed for each interval.
- Note
- The term "histogram" is used in a different way in the areas of digital image processing and statistics. Wikipedia introduces the terms "image histogram" and "color histogram" to avoid confusions. While "image histograms" can be displayed by a QwtPlotCurve there is no applicable plot item for a "color histogram" yet.
- See also
- QwtPlotBarChart, QwtPlotMultiBarChart