Public Types¶

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

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 override
Bounding rectangle of the shape. virtual void draw (QPainter *, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect) const override
virtual QwtGraphic legendIcon (int index, const QSizeF &) const override
virtual int rtti () const override

Additional Inherited Members¶

typedef QFlags<PaintAttribute > QwtPlotShapeItem::PaintAttributes¶

An ORed combination of PaintAttribute values.

Definition at line 61 of file qwt_plot_shapeitem.h.

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.

Definition at line 64 of file qwt_plot_shapeitem.h.

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.

Definition at line 47 of file qwt_plot_shapeitem.h.

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

Constructor. Sets the following item attributes:

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

Parameters

Definition at line 112 of file qwt_plot_shapeitem.cpp.

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

Constructor. Sets the following item attributes:

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

Parameters

Definition at line 127 of file qwt_plot_shapeitem.cpp.

QBrush QwtPlotShapeItem::brush () const¶

Returns

See also

Definition at line 336 of file qwt_plot_shapeitem.cpp.

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

Draw the shape item

Parameters

Implements QwtPlotItem.

Definition at line 385 of file qwt_plot_shapeitem.cpp.

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

Returns

Parameters

See also

Reimplemented from QwtPlotItem.

Definition at line 463 of file qwt_plot_shapeitem.cpp.

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

Returns

See also

Definition at line 199 of file qwt_plot_shapeitem.cpp.

QPen QwtPlotShapeItem::pen () const¶

Returns

See also

Definition at line 310 of file qwt_plot_shapeitem.cpp.

double QwtPlotShapeItem::renderTolerance () const¶

Returns

See also

Definition at line 372 of file qwt_plot_shapeitem.cpp.

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

Returns

Reimplemented from QwtPlotItem.

Definition at line 151 of file qwt_plot_shapeitem.cpp.

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

Assign a brush.

The brush is used to fill the path

Parameters

See also

Definition at line 323 of file qwt_plot_shapeitem.cpp.

void QwtPlotShapeItem::setLegendMode (LegendMode mode)¶

Set the mode how to represent the item on the legend

Parameters

See also

Definition at line 186 of file qwt_plot_shapeitem.cpp.

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

Specify an attribute how to draw the shape

Parameters

See also

Definition at line 163 of file qwt_plot_shapeitem.cpp.

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

See also

Definition at line 284 of file qwt_plot_shapeitem.cpp.

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

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

Parameters

See also

Definition at line 297 of file qwt_plot_shapeitem.cpp.

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

Set a path built from a polygon.

Parameters

See also

Definition at line 230 of file qwt_plot_shapeitem.cpp.

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

Set a path built from a rectangle.

Parameters

See also

Definition at line 216 of file qwt_plot_shapeitem.cpp.

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

See also

Definition at line 357 of file qwt_plot_shapeitem.cpp.

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

Set the shape to be displayed.

Parameters

See also

Definition at line 244 of file qwt_plot_shapeitem.cpp.

QPainterPath QwtPlotShapeItem::shape () const¶

Returns

See also

Definition at line 266 of file qwt_plot_shapeitem.cpp.

bool QwtPlotShapeItem::testPaintAttribute (PaintAttribute attribute) const¶

Returns

See also

Definition at line 175 of file qwt_plot_shapeitem.cpp.