A class for drawing transient features (e.g. More...

#include <qgsrubberband.h>

Inheritance diagram for QgsRubberBand:

Public Types
enum	IconType { ICON_NONE, ICON_CROSS, ICON_X, ICON_BOX, ICON_CIRCLE, ICON_FULL_BOX, ICON_DIAMOND, ICON_FULL_DIAMOND }
	Icons. More...

Public Member Functions
	QgsRubberBand (QgsMapCanvas *mapCanvas, QgsWkbTypes::GeometryType geometryType=QgsWkbTypes::LineGeometry)
	Creates a new RubberBand. More...

void	addGeometry (const QgsGeometry &geometry, QgsVectorLayer *layer)
	Adds the geometry of an existing feature to a rubberband This is useful for multi feature highlighting. More...

void	addGeometry (const QgsGeometry &geometry, const QgsCoordinateReferenceSystem &crs=QgsCoordinateReferenceSystem())
	Adds a geometry to the rubberband. More...

void	addPoint (const QgsPointXY &p, bool doUpdate=true, int geometryIndex=0)
	Adds a vertex to the rubberband and update canvas. More...

QgsGeometry	asGeometry () const
	Returns the rubberband as a Geometry. More...

void	closePoints (bool doUpdate=true, int geometryIndex=0)
	Ensures that a polygon geometry is closed and that the last vertex equals the first vertex. More...

QColor	fillColor () const
	Returns the current fill color. More...

const QgsPointXY *	getPoint (int i, int j=0) const
	Returns a vertex. More...

IconType	icon () const
	Returns the current icon type to highlight point geometries. More...

int	iconSize () const
	Returns the current icon size of the point icons. More...

void	movePoint (const QgsPointXY &p, int geometryIndex=0)
	Moves the rubber band point specified by index. More...

void	movePoint (int index, const QgsPointXY &p, int geometryIndex=0)
	Moves the rubber band point specified by index. More...

int	numberOfVertices () const
	Returns count of vertices in all lists of mPoint. More...

int	partSize (int geometryIndex) const
	Returns number of vertices in feature part. More...

void	removeLastPoint (int geometryIndex=0, bool doUpdate=true)
	Removes the last point. More...

void	removePoint (int index=0, bool doUpdate=true, int geometryIndex=0)
	Removes a vertex from the rubberband and (optionally) updates canvas. More...

void	reset (QgsWkbTypes::GeometryType geometryType=QgsWkbTypes::LineGeometry)
	Clears all the geometries in this rubberband. More...

QColor	secondaryStrokeColor () const
	Returns the current secondary stroke color. More...

void	setBrushStyle (Qt::BrushStyle brushStyle)
	Sets the style of the brush. More...

void	setColor (const QColor &color)
	Sets the color for the rubberband. More...

void	setFillColor (const QColor &color)
	Sets the fill color for the rubberband. More...

void	setIcon (IconType icon)
	Sets the icon type to highlight point geometries. More...

void	setIconSize (int iconSize)
	Sets the size of the point icons. More...

void	setLineStyle (Qt::PenStyle penStyle)
	Sets the style of the line. More...

void	setSecondaryStrokeColor (const QColor &color)
	Sets a secondary stroke color for the rubberband which will be drawn under the main stroke color. More...

void	setStrokeColor (const QColor &color)
	Sets the stroke color for the rubberband. More...

void	setToCanvasRectangle (QRect rect)
	Sets this rubber band to a map canvas rectangle. More...

void	setToGeometry (const QgsGeometry &geom, QgsVectorLayer *layer)
	Sets this rubber band to geom. More...

void	setToGeometry (const QgsGeometry &geometry, const QgsCoordinateReferenceSystem &crs=QgsCoordinateReferenceSystem())
	Sets this rubber band to geometry. More...

void	setTranslationOffset (double dx, double dy)
	Adds translation to original coordinates (all in map coordinates) More...

void	setWidth (int width)
	Sets the width of the line. More...

int	size () const
	Returns number of geometries. More...

QColor	strokeColor () const
	Returns the current stroke color. More...

void	updatePosition () override
	called on changed extent or resize event to update position of the item More...

int	width () const
	Returns the current width of the line or stroke width for polygon. More...

Public Member Functions inherited from QgsMapCanvasItem
QRectF	boundingRect () const override

QgsRectangle	rect () const
	returns canvas item rectangle in map units More...

void	setRect (const QgsRectangle &r, bool resetRotation=true)
	sets canvas item rectangle in map units More...

QPointF	toCanvasCoordinates (const QgsPointXY &point) const
	transformation from map coordinates to screen coordinates More...

QgsPointXY	toMapCoordinates (QPoint point) const
	transformation from screen coordinates to map coordinates More...

Protected Member Functions
void	drawShape (QPainter *p, const QVector< QPointF > &pts)
	Draws shape of the rubber band. More...

void	paint (QPainter *p) override
	Paints the rubber band in response to an update event. More...

void	updateRect ()
	Recalculates needed rectangle. More...

Protected Member Functions inherited from QgsMapCanvasItem
	QgsMapCanvasItem (QgsMapCanvas *mapCanvas)
	protected constructor: cannot be constructed directly More...

	~QgsMapCanvasItem () override

void	paint (QPainter painter, const QStyleOptionGraphicsItem option, QWidget *widget=nullptr) override

bool	setRenderContextVariables (QPainter *p, QgsRenderContext &context) const
	Sets render context parameters. More...

void	updateCanvas ()
	schedules map canvas for repaint More...

Properties
QColor	fillColor

int	iconSize

QColor	secondaryStrokeColor

QColor	strokeColor

int	width

Additional Inherited Members
Protected Attributes inherited from QgsMapCanvasItem
QSizeF	mItemSize
	cached size of the item (to return in boundingRect()) More...

QgsMapCanvas *	mMapCanvas = nullptr
	pointer to map canvas More...

QgsRectangle	mRect
	cached canvas item rectangle in map coordinates encodes position (xmin,ymax) and size (width/height) used to re-position and re-size the item on zoom/pan while waiting for the renderer to complete. More...

double	mRectRotation

Detailed Description

A class for drawing transient features (e.g.

digitizing lines) on the map.

The QgsRubberBand class provides a transparent overlay widget for tracking the mouse while drawing polylines or polygons.

Definition at line 47 of file qgsrubberband.h.

Member Enumeration Documentation

enum QgsRubberBand::IconType

Icons.

Enumerator
ICON_NONE	No icon is used.
ICON_CROSS	A cross is used to highlight points (+)
ICON_X	A cross is used to highlight points (x)
ICON_BOX	A box is used to highlight points (□)
ICON_CIRCLE	A circle is used to highlight points (○)
ICON_FULL_BOX	A full box is used to highlight points (■)
ICON_DIAMOND	A diamond is used to highlight points (◇) Since QGIS 3.0
ICON_FULL_DIAMOND	A diamond is used to highlight points (◆) Since QGIS 3.0

Definition at line 68 of file qgsrubberband.h.

Constructor & Destructor Documentation

QgsRubberBand::QgsRubberBand	(	QgsMapCanvas *	mapCanvas,
		QgsWkbTypes::GeometryType	geometryType = `QgsWkbTypes::LineGeometry`
	)

Creates a new RubberBand.

Parameters

mapCanvas	The map canvas to draw onto. Its CRS will be used to map points onto screen coordinates. The ownership is transferred to this canvas.
geometryType	Defines how the data should be drawn onto the screen. QgsWkbTypes::LineGeometry, QgsWkbTypes::PolygonGeometry or QgsWkbTypes::PointGeometry

Definition at line 25 of file qgsrubberband.cpp.

Member Function Documentation

void QgsRubberBand::addGeometry	(	const QgsGeometry &	geometry,
		QgsVectorLayer *	layer
	)

Adds the geometry of an existing feature to a rubberband This is useful for multi feature highlighting.

As of 2.0, this method does not change the GeometryType any more. You need to set the GeometryType of the rubberband explicitly by calling reset() or setToGeometry() with appropriate arguments. setToGeometry() is also to be preferred for backwards-compatibility.

Parameters

geometry	the geometry object. Will be treated as a collection of vertices.
layer	the layer containing the feature, used for coord transformation to map crs. If layer is nullptr, the coordinates are not going to be transformed.

Definition at line 251 of file qgsrubberband.cpp.

void QgsRubberBand::addGeometry	(	const QgsGeometry &	geometry,
		const QgsCoordinateReferenceSystem &	crs = `QgsCoordinateReferenceSystem()`
	)

Adds a geometry to the rubberband.

If crs is specified, the geometry will be automatically reprojected from crs to the canvas CRS.

Since: QGIS 3.0

Definition at line 270 of file qgsrubberband.cpp.

void QgsRubberBand::addPoint	(	const QgsPointXY &	p,
		bool	doUpdate = `true`,
		int	geometryIndex = `0`
	)

Adds a vertex to the rubberband and update canvas.

The rendering of the vertex depends on the current GeometryType and icon. If adding more points consider using update=false for better performance

Parameters

p	The vertex/point to add
doUpdate	Should the map canvas be updated immediately?
geometryIndex	The index of the feature part (in case of multipart geometries)

Definition at line 103 of file qgsrubberband.cpp.

QgsGeometry QgsRubberBand::asGeometry ( ) const

Returns the rubberband as a Geometry.

Returns: A geometry object which reflects the current state of the rubberband.

Definition at line 601 of file qgsrubberband.cpp.

void QgsRubberBand::closePoints	(	bool	doUpdate = `true`,
		int	geometryIndex = `0`
	)

Ensures that a polygon geometry is closed and that the last vertex equals the first vertex.

Parameters

doUpdate	set to true to update the map canvas immediately
geometryIndex	index of the feature part (in case of multipart geometries)

Since: QGIS 2.16

Definition at line 139 of file qgsrubberband.cpp.

void QgsRubberBand::drawShape	(	QPainter *	p,
		const QVector< QPointF > &	pts
	)

protected

Draws shape of the rubber band.

Parameters

p	The QPainter object
pts	A list of points used to draw the shape

Definition at line 427 of file qgsrubberband.cpp.

QColor QgsRubberBand::fillColor ( ) const

inline

Returns the current fill color.

Definition at line 141 of file qgsrubberband.h.

const QgsPointXY * QgsRubberBand::getPoint	(	int	i,
		int	j = `0`
	)		const

Returns a vertex.

Parameters

i	The geometry index
j	The vertex index within geometry i

Definition at line 593 of file qgsrubberband.cpp.

IconType QgsRubberBand::icon ( ) const

inline

Returns the current icon type to highlight point geometries.

Definition at line 189 of file qgsrubberband.h.

int QgsRubberBand::iconSize ( ) const

inline

Returns the current icon size of the point icons.

Definition at line 199 of file qgsrubberband.h.

void QgsRubberBand::movePoint	(	const QgsPointXY &	p,
		int	geometryIndex = `0`
	)

Moves the rubber band point specified by index.

Note that if the rubber band is not used to track the last mouse position, the first point of the rubber band has two vertices

Definition at line 191 of file qgsrubberband.cpp.

void QgsRubberBand::movePoint	(	int	index,
		const QgsPointXY &	p,
		int	geometryIndex = `0`
	)

Moves the rubber band point specified by index.

Note that if the rubber band is not used to track the last mouse position, the first point of the rubber band has two vertices

Definition at line 209 of file qgsrubberband.cpp.

int QgsRubberBand::numberOfVertices ( ) const

Returns count of vertices in all lists of mPoint.

Returns: The total number of vertices

Definition at line 578 of file qgsrubberband.cpp.

void QgsRubberBand::paint ( QPainter * p )

overrideprotectedvirtual

Paints the rubber band in response to an update event.

Parameters

p	The QPainter object

Implements QgsMapCanvasItem.

Definition at line 385 of file qgsrubberband.cpp.

int QgsRubberBand::partSize ( int geometryIndex ) const

Returns number of vertices in feature part.

Parameters

geometryIndex The index of the feature part (in case of multipart geometries)

Returns: number of vertices

Definition at line 572 of file qgsrubberband.cpp.

void QgsRubberBand::removeLastPoint	(	int	geometryIndex = `0`,
		bool	doUpdate = `true`
	)

Removes the last point.

Most useful in connection with undo operations

Definition at line 186 of file qgsrubberband.cpp.

void QgsRubberBand::removePoint	(	int	index = `0`,
		bool	doUpdate = `true`,
		int	geometryIndex = `0`
	)

Removes a vertex from the rubberband and (optionally) updates canvas.

Parameters

index	The index of the vertex/point to remove, negative indexes start at end
doUpdate	Should the map canvas be updated immediately?
geometryIndex	The index of the feature part (in case of multipart geometries)

Definition at line 160 of file qgsrubberband.cpp.

void QgsRubberBand::reset ( QgsWkbTypes::GeometryType geometryType = QgsWkbTypes::LineGeometry )

Clears all the geometries in this rubberband.

Sets the representation type according to geometryType.

Parameters

geometryType Defines how the data should be drawn onto the screen. (Use Qgis::Line, Qgis::Polygon or Qgis::Point)

Definition at line 95 of file qgsrubberband.cpp.

QColor QgsRubberBand::secondaryStrokeColor ( ) const

inline

Returns the current secondary stroke color.

Definition at line 166 of file qgsrubberband.h.

void QgsRubberBand::setBrushStyle ( Qt::BrushStyle brushStyle )

Sets the style of the brush.

Definition at line 90 of file qgsrubberband.cpp.

void QgsRubberBand::setColor ( const QColor & color )

Sets the color for the rubberband.

Shorthand method to set fill and stroke color with a single call.

Parameters

color The color used to render this rubberband

Definition at line 46 of file qgsrubberband.cpp.

void QgsRubberBand::setFillColor ( const QColor & color )

Sets the fill color for the rubberband.

Parameters

color The color used to render this rubberband

Since: QGIS 2.6

Definition at line 52 of file qgsrubberband.cpp.

void QgsRubberBand::setIcon ( IconType icon )

Sets the icon type to highlight point geometries.

Parameters

icon	The icon to visualize point geometries

Definition at line 75 of file qgsrubberband.cpp.

void QgsRubberBand::setIconSize ( int iconSize )

Sets the size of the point icons.

Definition at line 80 of file qgsrubberband.cpp.

void QgsRubberBand::setLineStyle ( Qt::PenStyle penStyle )

Sets the style of the line.

Definition at line 85 of file qgsrubberband.cpp.

void QgsRubberBand::setSecondaryStrokeColor ( const QColor & color )

Sets a secondary stroke color for the rubberband which will be drawn under the main stroke color.

Set to an invalid color to avoid drawing the secondary stroke.

Parameters

color The color used to render a secondary stroke color to this rubberband

Since: QGIS 3.0

Definition at line 65 of file qgsrubberband.cpp.

void QgsRubberBand::setStrokeColor ( const QColor & color )

Sets the stroke color for the rubberband.

Parameters

color The color used to render this rubberband

Since: QGIS 2.6

Definition at line 60 of file qgsrubberband.cpp.

void QgsRubberBand::setToCanvasRectangle ( QRect rect )

Sets this rubber band to a map canvas rectangle.

Parameters

rect	rectangle in canvas coordinates

Definition at line 365 of file qgsrubberband.cpp.

void QgsRubberBand::setToGeometry	(	const QgsGeometry &	geom,
		QgsVectorLayer *	layer
	)

Sets this rubber band to geom.

This is useful for feature highlighting. In contrast to addGeometry(), this method does also change the geometry type of the rubberband.

Parameters

geom	the geometry object
layer	the layer containing the feature, used for coord transformation to map crs. If layer is nullptr, the coordinates are not going to be transformed.

Definition at line 227 of file qgsrubberband.cpp.

void QgsRubberBand::setToGeometry	(	const QgsGeometry &	geometry,
		const QgsCoordinateReferenceSystem &	crs = `QgsCoordinateReferenceSystem()`
	)

Sets this rubber band to geometry.

In contrast to addGeometry(), this method does also change the geometry type of the rubberband. The coordinate reference system of the geometry can be specified with crs. If an invalid crs is passed, the geometry will not be reprojected and needs to be in canvas crs already. By default, no reprojection is done.

Since: QGIS 3.4

Definition at line 239 of file qgsrubberband.cpp.

void QgsRubberBand::setTranslationOffset	(	double	dx,
		double	dy
	)

Adds translation to original coordinates (all in map coordinates)

Parameters

dx	x translation
dy	y translation

Definition at line 560 of file qgsrubberband.cpp.

void QgsRubberBand::setWidth ( int width )

Sets the width of the line.

Stroke width for polygon.

Parameters

width The width for any lines painted for this rubberband

Definition at line 70 of file qgsrubberband.cpp.

int QgsRubberBand::size ( ) const

Returns number of geometries.

Returns: number of geometries

Definition at line 567 of file qgsrubberband.cpp.

QColor QgsRubberBand::strokeColor ( ) const

inline

Returns the current stroke color.

Definition at line 153 of file qgsrubberband.h.

void QgsRubberBand::updatePosition ( )

overridevirtual

called on changed extent or resize event to update position of the item

Reimplemented from QgsMapCanvasItem.

Definition at line 550 of file qgsrubberband.cpp.

void QgsRubberBand::updateRect ( )

protected

Recalculates needed rectangle.

Definition at line 505 of file qgsrubberband.cpp.

int QgsRubberBand::width ( ) const

inline

Returns the current width of the line or stroke width for polygon.

Definition at line 177 of file qgsrubberband.h.

Property Documentation

QColor QgsRubberBand::fillColor

readwrite

Definition at line 61 of file qgsrubberband.h.

int QgsRubberBand::iconSize

readwrite

Definition at line 63 of file qgsrubberband.h.

QColor QgsRubberBand::secondaryStrokeColor

readwrite

Definition at line 64 of file qgsrubberband.h.

QColor QgsRubberBand::strokeColor

readwrite

Definition at line 62 of file qgsrubberband.h.

int QgsRubberBand::width

readwrite

Definition at line 65 of file qgsrubberband.h.

The documentation for this class was generated from the following files:

/build/qgis-3.4.15+24xenial/src/gui/qgsrubberband.h
/build/qgis-3.4.15+24xenial/src/gui/qgsrubberband.cpp

Public Types

Public Member Functions

Protected Member Functions

Properties

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Property Documentation