|  | 
| enum | CurveStyle { NoCurve = -1, 
Lines, 
Sticks, 
Steps,
 Dots, 
UserCurve = 100
 }
 | 
|  | 
| enum | CurveAttribute { Inverted = 0x01, 
Fitted = 0x02
 } | 
|  | 
| enum | LegendAttribute { LegendNoAttribute = 0x00, 
LegendShowLine = 0x01, 
LegendShowSymbol = 0x02, 
LegendShowBrush = 0x04
 } | 
|  | 
| enum | PaintAttribute { ClipPolygons = 0x01, 
FilterPoints = 0x02, 
MinimizeMemory = 0x04, 
ImageBuffer = 0x08
 } | 
|  | 
| typedef QFlags< CurveAttribute > | CurveAttributes | 
|  | Curve attributes. 
 | 
|  | 
| typedef QFlags< LegendAttribute > | LegendAttributes | 
|  | Legend attributes. 
 | 
|  | 
| 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. 
 | 
|  | 
|  | 
|  | QwtPlotCurve (const QString &title=QString::null) | 
|  | 
|  | QwtPlotCurve (const QwtText &title) | 
|  | 
| virtual | ~QwtPlotCurve () | 
|  | Destructor. 
 | 
|  | 
| virtual int | rtti () const | 
|  | 
| void | setPaintAttribute (PaintAttribute, bool on=true) | 
|  | 
| bool | testPaintAttribute (PaintAttribute) const | 
|  | 
| void | setLegendAttribute (LegendAttribute, bool on=true) | 
|  | 
| bool | testLegendAttribute (LegendAttribute) const | 
|  | 
| void | setRawSamples (const double *xData, const double *yData, int size) | 
|  | Initialize the data by pointing to memory blocks which are not managed by QwtPlotCurve.  More... 
 | 
|  | 
| void | setSamples (const double *xData, const double *yData, int size) | 
|  | 
| void | setSamples (const QVector< double > &xData, const QVector< double > &yData) | 
|  | Initialize data with x- and y-arrays (explicitly shared)  More... 
 | 
|  | 
| void | setSamples (const QVector< QPointF > &) | 
|  | 
| void | setSamples (QwtSeriesData< QPointF > *) | 
|  | 
| int | closestPoint (const QPoint &pos, double *dist=NULL) const | 
|  | 
| double | minXValue () const | 
|  | boundingRect().left() 
 | 
|  | 
| double | maxXValue () const | 
|  | boundingRect().right() 
 | 
|  | 
| double | minYValue () const | 
|  | boundingRect().top() 
 | 
|  | 
| double | maxYValue () const | 
|  | boundingRect().bottom() 
 | 
|  | 
| void | setCurveAttribute (CurveAttribute, bool on=true) | 
|  | 
| bool | testCurveAttribute (CurveAttribute) 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 &) | 
|  | Assign a brush.  More... 
 | 
|  | 
| const QBrush & | brush () const | 
|  | 
| void | setBaseline (double) | 
|  | Set the value of the baseline.  More... 
 | 
|  | 
| double | baseline () const | 
|  | 
| void | setStyle (CurveStyle style) | 
|  | 
| CurveStyle | style () const | 
|  | 
| void | setSymbol (QwtSymbol *) | 
|  | Assign a symbol.  More... 
 | 
|  | 
| const QwtSymbol * | symbol () const | 
|  | 
| void | setCurveFitter (QwtCurveFitter *) | 
|  | 
| QwtCurveFitter * | curveFitter () const | 
|  | 
| virtual void | drawSeries (QPainter *, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) 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 QRectF | boundingRect () const | 
|  | 
| 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< QPointF > *series) | 
|  | 
| QwtSeriesData< QPointF > * | data () | 
|  | 
| const QwtSeriesData< QPointF > * | data () const | 
|  | 
| QPointF | sample (int index) const | 
|  | 
| virtual size_t | dataSize () const | 
|  | 
| virtual QRectF | dataRect () const | 
|  | 
| virtual void | setRectOfInterest (const QRectF &rect) | 
|  | 
| QwtSeriesData< QPointF > * | swapData (QwtSeriesData< QPointF > *series) | 
|  | 
|  | 
| void | init () | 
|  | Initialize internal members. 
 | 
|  | 
| virtual void | drawCurve (QPainter *p, int style, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const | 
|  | Draw the line part (without symbols) of a curve interval.  More... 
 | 
|  | 
| virtual void | drawSymbols (QPainter *p, const QwtSymbol &, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const | 
|  | 
| virtual void | drawLines (QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const | 
|  | Draw lines.  More... 
 | 
|  | 
| virtual void | drawSticks (QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const | 
|  | 
| virtual void | drawDots (QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const | 
|  | 
| virtual void | drawSteps (QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const | 
|  | 
| virtual void | fillCurve (QPainter *, const QwtScaleMap &, const QwtScaleMap &, const QRectF &canvasRect, QPolygonF &) const | 
|  | 
| void | closePolyline (QPainter *, const QwtScaleMap &, const QwtScaleMap &, QPolygonF &) const | 
|  | Complete a polygon to be a closed polygon including the area between the original polygon and the baseline.  More... 
 | 
|  | 
| 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. 
 | 
|  | 
A plot item, that represents a series of points. 
A curve is the representation of a series of points in the x-y plane. It supports different display styles, interpolation ( f.e. spline ) and symbols.
- Usage
- 
- a) Assign curve properties 
- When a curve is created, it is configured to draw black solid lines with in QwtPlotCurve::Lines style and no symbols. You can change this by calling setPen(), setStyle() and setSymbol(). 
- b) Connect/Assign data. 
- QwtPlotCurve gets its points using a QwtSeriesData object offering a bridge to the real storage of the points ( like QAbstractItemModel ). There are several convenience classes derived from QwtSeriesData, that also store the points inside ( like QStandardItemModel ). QwtPlotCurve also offers a couple of variations of setSamples(), that build QwtSeriesData objects from arrays internally. 
- c) Attach the curve to a plot 
- See QwtPlotItem::attach() 
 
- Example:
- see examples/bode
- See also
- QwtPointSeriesData, QwtSymbol, QwtScaleMap