QwtPlotMarker(3) Qwt User's Guide QwtPlotMarker(3) NAME QwtPlotMarker - A class for drawing markers. SYNOPSIS #include Inherits QwtPlotItem. Public Types enum LineStyle { NoLine, HLine, VLine, Cross } Public Member Functions QwtPlotMarker () Sets alignment to Qt::AlignCenter, and style to QwtPlotMarker::NoLine. QwtPlotMarker (const QString &title) Sets alignment to Qt::AlignCenter, and style to QwtPlotMarker::NoLine. QwtPlotMarker (const QwtText &title) Sets alignment to Qt::AlignCenter, and style to QwtPlotMarker::NoLine. virtual ~QwtPlotMarker () Destructor. virtual int rtti () const override double xValue () const Return x Value. double yValue () const Return y Value. QPointF value () const Return Value. void setXValue (double) Set X Value. void setYValue (double) Set Y Value. void setValue (double, double) Set Value. void setValue (const QPointF &) Set Value. void setLineStyle (LineStyle) Set the line style. LineStyle lineStyle () const void setLinePen (const QColor &, qreal width=0.0, Qt::PenStyle=Qt::SolidLine) void setLinePen (const QPen &) const QPen & linePen () const void setSymbol (const QwtSymbol *) Assign a symbol. const QwtSymbol * symbol () const void setLabel (const QwtText &) Set the label. QwtText label () const void setLabelAlignment (Qt::Alignment) Set the alignment of the label. Qt::Alignment labelAlignment () const void setLabelOrientation (Qt::Orientation) Set the orientation of the label. Qt::Orientation labelOrientation () const void setSpacing (int) Set the spacing. int spacing () const virtual void draw (QPainter *, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &) const override virtual QRectF boundingRect () const override virtual QwtGraphic legendIcon (int index, const QSizeF &) const override Protected Member Functions virtual void drawLines (QPainter *, const QRectF &, const QPointF &) const virtual void drawSymbol (QPainter *, const QRectF &, const QPointF &) const virtual void drawLabel (QPainter *, const QRectF &, const QPointF &) const Detailed Description A class for drawing markers. A marker can be a horizontal line, a vertical line, a symbol, a label or any combination of them, which can be drawn around a center point inside a bounding rectangle. The setSymbol() member assigns a symbol to the marker. The symbol is drawn at the specified point. With setLabel(), a label can be assigned to the marker. The setLabelAlignment() member specifies where the label is drawn. All the Align*-constants in Qt::AlignmentFlags (see Qt documentation) are valid. The interpretation of the alignment depends on the marker's line style. The alignment refers to the center point of the marker, which means, for example, that the label would be printed left above the center point if the alignment was set to Qt::AlignLeft | Qt::AlignTop. Note QwtPlotTextLabel is intended to align a text label according to the geometry of canvas ( unrelated to plot coordinates ) Definition at line 45 of file qwt_plot_marker.h. Member Enumeration Documentation enum QwtPlotMarker::LineStyle Line styles. See also setLineStyle(), lineStyle() Enumerator NoLine No line. HLine A horizontal line. VLine A vertical line. Cross A crosshair. Definition at line 53 of file qwt_plot_marker.h. Member Function Documentation QRectF QwtPlotMarker::boundingRect () const [override], [virtual] Returns An invalid bounding rect: QRectF(1.0, 1.0, -2.0, -2.0) Note A width or height < 0.0 is ignored by the autoscaler Reimplemented from QwtPlotItem. Definition at line 572 of file qwt_plot_marker.cpp. void QwtPlotMarker::draw (QPainter * painter, const QwtScaleMap & xMap, const QwtScaleMap & yMap, const QRectF & canvasRect) const [override], [virtual] Draw the marker Parameters painter Painter xMap x Scale Map yMap y Scale Map canvasRect Contents rectangle of the canvas in painter coordinates Implements QwtPlotItem. Definition at line 142 of file qwt_plot_marker.cpp. void QwtPlotMarker::drawLabel (QPainter * painter, const QRectF & canvasRect, const QPointF & pos) const [protected], [virtual] Align and draw the text label of the marker Parameters painter Painter canvasRect Contents rectangle of the canvas in painter coordinates pos Position of the marker, translated into widget coordinates See also drawLabel(), drawSymbol() Definition at line 232 of file qwt_plot_marker.cpp. void QwtPlotMarker::drawLines (QPainter * painter, const QRectF & canvasRect, const QPointF & pos) const [protected], [virtual] Draw the lines marker Parameters painter Painter canvasRect Contents rectangle of the canvas in painter coordinates pos Position of the marker, translated into widget coordinates See also drawLabel(), drawSymbol() Definition at line 163 of file qwt_plot_marker.cpp. void QwtPlotMarker::drawSymbol (QPainter * painter, const QRectF & canvasRect, const QPointF & pos) const [protected], [virtual] Draw the symbol of the marker Parameters painter Painter canvasRect Contents rectangle of the canvas in painter coordinates pos Position of the marker, translated into widget coordinates See also drawLabel(), QwtSymbol::drawSymbol() Definition at line 203 of file qwt_plot_marker.cpp. QwtText QwtPlotMarker::label () const Returns the label See also setLabel() Definition at line 433 of file qwt_plot_marker.cpp. Qt::Alignment QwtPlotMarker::labelAlignment () const Returns the label alignment See also setLabelAlignment(), setLabelOrientation() Definition at line 465 of file qwt_plot_marker.cpp. Qt::Orientation QwtPlotMarker::labelOrientation () const Returns the label orientation See also setLabelOrientation(), labelAlignment() Definition at line 493 of file qwt_plot_marker.cpp. QwtGraphic QwtPlotMarker::legendIcon (int index, const QSizeF & size) const [override], [virtual] Returns Icon representing the marker on the legend Parameters index Index of the legend entry ( usually there is only one ) size Icon size See also setLegendIconSize(), legendData() Reimplemented from QwtPlotItem. Definition at line 598 of file qwt_plot_marker.cpp. const QPen & QwtPlotMarker::linePen () const Returns the line pen See also setLinePen() Definition at line 567 of file qwt_plot_marker.cpp. QwtPlotMarker::LineStyle QwtPlotMarker::lineStyle () const Returns the line style See also setLineStyle() Definition at line 381 of file qwt_plot_marker.cpp. int QwtPlotMarker::rtti () const [override], [virtual] Returns QwtPlotItem::Rtti_PlotMarker Reimplemented from QwtPlotItem. Definition at line 82 of file qwt_plot_marker.cpp. void QwtPlotMarker::setLabel (const QwtText & label) Set the label. Parameters label Label text See also label() Definition at line 420 of file qwt_plot_marker.cpp. void QwtPlotMarker::setLabelAlignment (Qt::Alignment align) Set the alignment of the label. In case of QwtPlotMarker::HLine the alignment is relative to the y position of the marker, but the horizontal flags correspond to the canvas rectangle. In case of QwtPlotMarker::VLine the alignment is relative to the x position of the marker, but the vertical flags correspond to the canvas rectangle. In all other styles the alignment is relative to the marker's position. Parameters align Alignment. See also labelAlignment(), labelOrientation() Definition at line 452 of file qwt_plot_marker.cpp. void QwtPlotMarker::setLabelOrientation (Qt::Orientation orientation) Set the orientation of the label. When orientation is Qt::Vertical the label is rotated by 90.0 degrees ( from bottom to top ). Parameters orientation Orientation of the label See also labelOrientation(), setLabelAlignment() Definition at line 480 of file qwt_plot_marker.cpp. void QwtPlotMarker::setLinePen (const QColor & color, qreal width = 0.0, Qt::PenStyle style = Qt::SolidLine) Build and assign a line pen In Qt5 the default pen width is 1.0 ( 0.0 in Qt4 ) what makes it non cosmetic ( see QPen::isCosmetic() ). This method has been introduced to hide this incompatibility. Parameters color Pen color width Pen width style Pen style See also pen(), brush() Definition at line 541 of file qwt_plot_marker.cpp. void QwtPlotMarker::setLinePen (const QPen & pen) Specify a pen for the line. Parameters pen New pen See also linePen() Definition at line 552 of file qwt_plot_marker.cpp. void QwtPlotMarker::setLineStyle (LineStyle style) Set the line style. Parameters style Line style. See also lineStyle() Definition at line 366 of file qwt_plot_marker.cpp. void QwtPlotMarker::setSpacing (int spacing) Set the spacing. When the label is not centered on the marker position, the spacing is the distance between the position and the label. Parameters spacing Spacing See also spacing(), setLabelAlignment() Definition at line 507 of file qwt_plot_marker.cpp. void QwtPlotMarker::setSymbol (const QwtSymbol * symbol) Assign a symbol. Parameters symbol New symbol See also symbol() Definition at line 391 of file qwt_plot_marker.cpp. int QwtPlotMarker::spacing () const Returns the spacing See also setSpacing() Definition at line 523 of file qwt_plot_marker.cpp. const QwtSymbol * QwtPlotMarker::symbol () const Returns the symbol See also setSymbol(), QwtSymbol Definition at line 410 of file qwt_plot_marker.cpp. Author Generated automatically by Doxygen for Qwt User's Guide from the source code. Version 6.2.0 Sun Jul 18 2021 QwtPlotMarker(3)