QwtPolarMarker Class Reference
A class for drawing markers.
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#include <qwt_polar_marker.h>
List of all members.
Detailed Description
A class for drawing markers.
A marker can be a a symbol, a label or a 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 alignment refers to the center point of the marker, which means, for example, that the label would be painted left above the center point if the alignment was set to AlignLeft|AlignTop.
Constructor & Destructor Documentation
QwtPolarMarker::QwtPolarMarker |
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[explicit] |
Sets alignment to Qt::AlignCenter, and style to NoLine.
QwtPolarMarker::~QwtPolarMarker |
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[virtual] |
Member Function Documentation
QwtDoubleInterval QwtPolarMarker::boundingInterval |
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int |
scaleId |
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const [virtual] |
Interval, that is necessary to display the item This interval can be useful for operations like clipping or autoscaling
- Parameters:
-
- Returns:
- bounding interval ( == position )
- See also:
- position()
Reimplemented from QwtPolarItem.
void QwtPolarMarker::draw |
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QPainter * |
painter, |
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const QwtScaleMap & |
azimuthMap, |
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const QwtScaleMap & |
radialMap, |
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const QwtDoublePoint & |
pole, |
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double |
radius, |
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const QwtDoubleRect & |
canvasRect | |
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Draw the marker
- Parameters:
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| painter | Painter |
| azimuthMap | Maps azimuth values to values related to 0.0, M_2PI |
| radialMap | Maps radius values into painter coordinates. |
| pole | Position of the pole in painter coordinates |
| radius | Radius of the complete plot area in painter coordinates |
| canvasRect | Contents rect of the canvas in painter coordinates |
Implements QwtPolarItem.
QwtText QwtPolarMarker::label |
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const |
Qt::Alignment QwtPolarMarker::labelAlignment |
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const |
- Returns:
- Position of the marker
int QwtPolarMarker::rtti |
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const [virtual] |
- Returns:
- QwtPolarItem::Rtti_PlotMarker
Reimplemented from QwtPolarItem.
void QwtPolarMarker::setLabel |
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const QwtText & |
label |
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Set the label.
- Parameters:
-
- See also:
- label()
void QwtPolarMarker::setLabelAlignment |
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Qt::Alignment |
align |
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Set the alignment of the label.
The alignment determines where the label is drawn relative to the marker's position.
- Parameters:
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| align | Alignment. A combination of AlignTop, AlignBottom, AlignLeft, AlignRight, AlignCenter, AlgnHCenter, AlignVCenter. |
- See also:
- labelAlignment()
Change the position of the marker.
void QwtPolarMarker::setSymbol |
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const QwtSymbol & |
s |
) |
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Assign a symbol.
- Parameters:
-
- See also:
- symbol()
const QwtSymbol & QwtPolarMarker::symbol |
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const |