|  | 
| enum | SymbolStyle { NoSymbol = -1, 
Bar, 
CandleStick, 
UserSymbol = 100
 } | 
|  | Symbol styles.  More... 
 | 
|  | 
| enum | Direction { Increasing, 
Decreasing
 } | 
|  | Direction of a price movement.  More... 
 | 
|  | 
| enum | PaintAttribute { ClipSymbols = 0x01
 } | 
|  | 
| typedef QFlags< PaintAttribute > | PaintAttributes | 
|  | Paint attributes. 
 | 
|  | 
| 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. 
 | 
|  | 
|  | 
|  | QwtPlotTradingCurve (const QString &title=QString::null) | 
|  | 
|  | QwtPlotTradingCurve (const QwtText &title) | 
|  | 
| virtual | ~QwtPlotTradingCurve () | 
|  | Destructor. 
 | 
|  | 
| virtual int | rtti () const | 
|  | 
| void | setPaintAttribute (PaintAttribute, bool on=true) | 
|  | 
| bool | testPaintAttribute (PaintAttribute) const | 
|  | 
| void | setSamples (const QVector< QwtOHLCSample > &) | 
|  | 
| void | setSamples (QwtSeriesData< QwtOHLCSample > *) | 
|  | 
| void | setSymbolStyle (SymbolStyle style) | 
|  | 
| SymbolStyle | symbolStyle () const | 
|  | 
| void | setSymbolPen (const QColor &, qreal width=0.0, Qt::PenStyle=Qt::SolidLine) | 
|  | 
| void | setSymbolPen (const QPen &) | 
|  | Set the symbol pen.  More... 
 | 
|  | 
| QPen | symbolPen () const | 
|  | 
| void | setSymbolBrush (Direction, const QBrush &) | 
|  | 
| QBrush | symbolBrush (Direction) const | 
|  | 
| void | setSymbolExtent (double width) | 
|  | Set the extent of the symbol.  More... 
 | 
|  | 
| double | symbolExtent () const | 
|  | 
| void | setMinSymbolWidth (double) | 
|  | 
| double | minSymbolWidth () const | 
|  | 
| void | setMaxSymbolWidth (double) | 
|  | 
| double | maxSymbolWidth () const | 
|  | 
| virtual void | drawSeries (QPainter *painter, 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... 
 | 
|  | 
|  | 
| void | init () | 
|  | Initialize internal members. 
 | 
|  | 
| virtual void | drawSymbols (QPainter *, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const | 
|  | 
| virtual void | drawUserSymbol (QPainter *, SymbolStyle, const QwtOHLCSample &, Qt::Orientation, bool inverted, double width) const | 
|  | Draw a symbol for a symbol style >= UserSymbol.  More... 
 | 
|  | 
| void | drawBar (QPainter *painter, const QwtOHLCSample &, Qt::Orientation, bool inverted, double width) const | 
|  | Draw a bar.  More... 
 | 
|  | 
| void | drawCandleStick (QPainter *, const QwtOHLCSample &, Qt::Orientation, double width) const | 
|  | Draw a candle stick.  More... 
 | 
|  | 
| virtual double | scaledSymbolWidth (const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect) 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. 
 | 
|  | 
QwtPlotTradingCurve illustrates movements in the price of a financial instrument over time. 
QwtPlotTradingCurve supports candlestick or bar ( OHLC ) charts that are used in the domain of technical analysis.
While the length ( height or width depending on orientation() ) of each symbol depends on the corresponding OHLC sample the size of the other dimension can be controlled using:
The extent is a size in scale coordinates, so that the symbol width is increasing when the plot is zoomed in. Minimum/Maximum width is in widget coordinates independent from the zoom level. When setting the minimum and maximum to the same value, the width of the symbol is fixed.