Public Types¶

enum PaintAttribute { ClipPolygons = 0x01 }
enum LegendMode { LegendShape, LegendColor }
Mode how to display the item on the legend. typedef QFlags< PaintAttribute > PaintAttributes
Paint attributes.

Public Member Functions¶

QwtPlotShapeItem (const QString &title=QString())
Constructor. QwtPlotShapeItem (const QwtText &title)
Constructor. virtual ~QwtPlotShapeItem ()
Destructor. void setPaintAttribute (PaintAttribute, bool on=true)
bool testPaintAttribute (PaintAttribute) const
void setLegendMode (LegendMode)
LegendMode legendMode () const
void setRect (const QRectF &)
Set a path built from a rectangle. void setPolygon (const QPolygonF &)
Set a path built from a polygon. void setShape (const QPainterPath &)
Set the shape to be displayed. QPainterPath shape () const
void setPen (const QColor &, qreal width=0.0, Qt::PenStyle=Qt::SolidLine)
void setPen (const QPen &)
Assign a pen. QPen pen () const
void setBrush (const QBrush &)
QBrush brush () const
void setRenderTolerance (double)
Set the tolerance for the weeding optimization. double renderTolerance () const
virtual QRectF boundingRect () const
Bounding rectangle of the shape. virtual void draw (QPainter *, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect) const
virtual QwtGraphic legendIcon (int index, const QSizeF &) const
virtual int rtti () const

Additional Inherited Members¶

enum QwtPlotShapeItem::LegendMode¶

Mode how to display the item on the legend.

Enumerator

LegendShape

Display a scaled down version of the shape.

LegendColor

Display a filled rectangle.

enum QwtPlotShapeItem::PaintAttribute¶

Attributes to modify the drawing algorithm. The default disables all attributes

See also:

Enumerator

ClipPolygons

Clip polygons before painting them. In situations, where points are far outside the visible area (f.e when zooming deep) this might be a substantial improvement for the painting performance

But polygon clipping will convert the painter path into polygons what might introduce a negative impact on the performance of paths composed from curves or ellipses.

QwtPlotShapeItem::QwtPlotShapeItem (const QString & title = QString()) [explicit]¶

Constructor. Sets the following item attributes:

• QwtPlotItem::AutoScale: true
• QwtPlotItem::Legend: false

Parameters:

QwtPlotShapeItem::QwtPlotShapeItem (const QwtText & title) [explicit]¶

Constructor. Sets the following item attributes:

• QwtPlotItem::AutoScale: true
• QwtPlotItem::Legend: false

Parameters:

QBrush QwtPlotShapeItem::brush () const¶

Returns:

See also:

void QwtPlotShapeItem::draw (QPainter * painter, const QwtScaleMap & xMap, const QwtScaleMap & yMap, const QRectF & canvasRect) const [virtual]¶

Draw the shape item

Parameters:

Implements QwtPlotItem.

QwtGraphic QwtPlotShapeItem::legendIcon (int index, const QSizeF & size) const [virtual]¶

Returns:

Parameters:

See also:

Reimplemented from QwtPlotItem.

QwtPlotShapeItem::LegendMode QwtPlotShapeItem::legendMode () const¶

Returns:

See also:

QPen QwtPlotShapeItem::pen () const¶

Returns:

See also:

double QwtPlotShapeItem::renderTolerance () const¶

Returns:

See also:

int QwtPlotShapeItem::rtti () const [virtual]¶

Returns:

Reimplemented from QwtPlotItem.

void QwtPlotShapeItem::setBrush (const QBrush & brush)¶

Assign a brush.

The brush is used to fill the path

Parameters:

See also:

void QwtPlotShapeItem::setLegendMode (LegendMode mode)¶

Set the mode how to represent the item on the legend

Parameters:

See also:

void QwtPlotShapeItem::setPaintAttribute (PaintAttribute attribute, bool on = true)¶

Specify an attribute how to draw the shape

Parameters:

See also:

void QwtPlotShapeItem::setPen (const QColor & color, qreal width = 0.0, Qt::PenStyle style = Qt::SolidLine)¶

Build and assign a 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:

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void QwtPlotShapeItem::setPen (const QPen & pen)¶

Assign a pen. The pen is used to draw the outline of the shape

Parameters:

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void QwtPlotShapeItem::setPolygon (const QPolygonF & polygon)¶

Set a path built from a polygon.

Parameters:

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void QwtPlotShapeItem::setRect (const QRectF & rect)¶

Set a path built from a rectangle.

Parameters:

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void QwtPlotShapeItem::setRenderTolerance (double tolerance)¶

Set the tolerance for the weeding optimization. After translating the shape into target device coordinate ( usually widget geometries ) the painter path can be simplified by a point weeding algorithm ( Douglas-Peucker ).

For shapes built from curves and ellipses weeding might have the opposite effect because they have to be expanded to polygons.

Parameters:

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void QwtPlotShapeItem::setShape (const QPainterPath & shape)¶

Set the shape to be displayed.

Parameters:

See also:

QPainterPath QwtPlotShapeItem::shape () const¶

Returns:

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bool QwtPlotShapeItem::testPaintAttribute (PaintAttribute attribute) const¶

Returns:

See also: