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 QwtPlotMarker::setSymbol() member assigns a symbol to the marker. The symbol is drawn at the specified point.
With QwtPlotMarker::setLabel(), a label can be assigned to the marker. The QwtPlotMarker::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 AlignLeft|AlignTop.
Definition at line 45 of file qwt_plot_marker.h.
Public Types | |
enum | LineStyle { NoLine, HLine, VLine, Cross } |
Public Member Functions | |
QwtPlotMarker () | |
virtual | ~QwtPlotMarker () |
virtual int | rtti () const |
double | xValue () const |
double | yValue () const |
QwtDoublePoint | value () const |
void | setXValue (double) |
void | setYValue (double) |
void | setValue (double, double) |
void | setValue (const QwtDoublePoint &) |
void | setLineStyle (LineStyle st) |
LineStyle | lineStyle () const |
void | setLinePen (const QPen &p) |
const QPen & | linePen () const |
void | setSymbol (const QwtSymbol &s) |
const QwtSymbol & | symbol () const |
void | setLabel (const QwtText &) |
QwtText | label () const |
void | setLabelAlignment (Qt::Alignment) |
Qt::Alignment | labelAlignment () const |
virtual void | draw (QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRect &) const |
virtual QwtDoubleRect | boundingRect () const |
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Line styles. Definition at line 53 of file qwt_plot_marker.h. |
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Sets alignment to Qt::AlignCenter, and style to NoLine.
Definition at line 48 of file qwt_plot_marker.cpp. References QwtPlotItem::setZ(). |
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Destructor.
Definition at line 56 of file qwt_plot_marker.cpp. |
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Reimplemented from QwtPlotItem. Definition at line 350 of file qwt_plot_marker.cpp. |
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Draw the marker.
Implements QwtPlotItem. Definition at line 120 of file qwt_plot_marker.cpp. References QwtPainter::drawLine(), and QwtScaleMap::transform(). |
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Definition at line 285 of file qwt_plot_marker.cpp. Referenced by setLabel(). |
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Definition at line 321 of file qwt_plot_marker.cpp. |
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Definition at line 345 of file qwt_plot_marker.cpp. |
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Definition at line 242 of file qwt_plot_marker.cpp. |
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Set the label.
Definition at line 272 of file qwt_plot_marker.cpp. References QwtPlotItem::itemChanged(), and label(). |
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Set the alignment of the label. The alignment determines where the label is drawn relative to the marker's position.
Definition at line 304 of file qwt_plot_marker.cpp. |
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Specify a pen for the line.
Definition at line 332 of file qwt_plot_marker.cpp. References QwtPlotItem::itemChanged(). |
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Set the line style.
Definition at line 229 of file qwt_plot_marker.cpp. References QwtPlotItem::itemChanged(). |
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Assign a symbol.
Definition at line 252 of file qwt_plot_marker.cpp. References QwtPlotItem::itemChanged(). |
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Set Value.
Definition at line 85 of file qwt_plot_marker.cpp. References setValue(). |
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Set Value.
Definition at line 91 of file qwt_plot_marker.cpp. References QwtPlotItem::itemChanged(). Referenced by setValue(), setXValue(), and setYValue(). |
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Set X Value.
Definition at line 102 of file qwt_plot_marker.cpp. References setValue(). |
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Set Y Value.
Definition at line 108 of file qwt_plot_marker.cpp. References setValue(). |
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Definition at line 262 of file qwt_plot_marker.cpp. |
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Return Value.
Definition at line 67 of file qwt_plot_marker.cpp. |
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Return x Value.
Definition at line 73 of file qwt_plot_marker.cpp. |
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Return y Value.
Definition at line 79 of file qwt_plot_marker.cpp. |