Snapping utils instance that is connected to a canvas and updates the configuration (map settings + current layer) whenever that is changed in the canvas. More...

#include <qgsmapcanvassnappingutils.h>

Inheritance diagram for QgsMapCanvasSnappingUtils:

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Public Member Functions
	QgsMapCanvasSnappingUtils (QgsMapCanvas canvas, QObject parent=nullptr)
	Construct map canvas snapping utils object.

Public Member Functions inherited from QgsSnappingUtils
	QgsSnappingUtils (QObject *parent=nullptr, bool enableSnappingForInvisibleFeature=true)
	Constructor for QgsSnappingUtils.

	~QgsSnappingUtils () override

void	addExtraSnapLayer (QgsVectorLayer *vl)
	Supply an extra snapping layer (typically a memory layer).

QgsSnappingConfig	config () const
	The snapping configuration controls the behavior of this object.

QgsVectorLayer *	currentLayer () const
	The current layer used if mode is SnapCurrentLayer.

QString	dump ()
	Gets extra information about the instance.

QSet< QgsVectorLayer * >	getExtraSnapLayers ()
	Returns the list of extra snapping layers.

IndexingStrategy	indexingStrategy () const
	Find out which strategy is used for indexing - by default hybrid indexing is used.

QList< QgsSnappingUtils::LayerConfig >	layers () const
	Query layers used for snapping.

QgsPointLocator *	locatorForLayer (QgsVectorLayer *vl)
	Gets a point locator for the given layer.

QgsMapSettings	mapSettings () const

void	removeExtraSnapLayer (QgsVectorLayer *vl)
	Removes an extra snapping layer.

void	setCurrentLayer (QgsVectorLayer *layer)
	Sets current layer so that if mode is SnapCurrentLayer we know which layer to use.

void	setEnableSnappingForInvisibleFeature (bool enable)
	Set if invisible features must be snapped or not.

void	setIndexingStrategy (IndexingStrategy strategy)
	Sets a strategy for indexing geometry data - determines how fast and memory consuming the data structures will be.

void	setMapSettings (const QgsMapSettings &settings)
	Assign current map settings to the utils - used for conversion between screen coords to map coords.

QgsPointLocator::Match	snapToCurrentLayer (QPoint point, QgsPointLocator::Types type, QgsPointLocator::MatchFilter *filter=nullptr)
	Snap to current layer.

QgsPointLocator::Match	snapToMap (const QgsPointXY &pointMap, QgsPointLocator::MatchFilter *filter=nullptr, bool relaxed=false)
	Snap to map according to the current configuration.

QgsPointLocator::Match	snapToMap (QPoint point, QgsPointLocator::MatchFilter *filter=nullptr, bool relaxed=false)
	Snap to map according to the current configuration.

Protected Member Functions
void	prepareIndexProgress (int index) override
	Called when finished indexing a layer with snapToMap. When index == count the indexing is complete.

void	prepareIndexStarting (int count) override
	Called when starting to index with snapToMap - can be overridden and e.g. progress dialog can be provided.

Protected Member Functions inherited from QgsSnappingUtils
void	clearAllLocators ()
	Deletes all existing locators (e.g. when destination CRS has changed and we need to reindex)

Additional Inherited Members
Public Types inherited from QgsSnappingUtils
enum	IndexingStrategy { IndexAlwaysFull , IndexNeverFull , IndexHybrid , IndexExtent }

Public Slots inherited from QgsSnappingUtils
void	setConfig (const QgsSnappingConfig &snappingConfig)
	The snapping configuration controls the behavior of this object.

void	toggleEnabled ()
	Toggles the state of snapping.

Signals inherited from QgsSnappingUtils
void	configChanged (const QgsSnappingConfig &snappingConfig)
	Emitted when the snapping settings object changes.

Properties inherited from QgsSnappingUtils
QgsSnappingConfig	config

Detailed Description

Snapping utils instance that is connected to a canvas and updates the configuration (map settings + current layer) whenever that is changed in the canvas.

Since: QGIS 2.8

Definition at line 33 of file qgsmapcanvassnappingutils.h.

Constructor & Destructor Documentation

◆ QgsMapCanvasSnappingUtils()

QgsMapCanvasSnappingUtils::QgsMapCanvasSnappingUtils	(	QgsMapCanvas *	canvas,
		QObject *	parent = `nullptr`
	)

Construct map canvas snapping utils object.

Parameters

canvas	map canvas
parent	parent object if `false` it will block until indexing is done

Definition at line 25 of file qgsmapcanvassnappingutils.cpp.

Member Function Documentation

◆ prepareIndexProgress()

void QgsMapCanvasSnappingUtils::prepareIndexProgress ( int index )

overrideprotectedvirtual

Called when finished indexing a layer with snapToMap. When index == count the indexing is complete.

Reimplemented from QgsSnappingUtils.

Definition at line 70 of file qgsmapcanvassnappingutils.cpp.

◆ prepareIndexStarting()

void QgsMapCanvasSnappingUtils::prepareIndexStarting ( int count )

overrideprotectedvirtual

Called when starting to index with snapToMap - can be overridden and e.g. progress dialog can be provided.

Reimplemented from QgsSnappingUtils.

Definition at line 63 of file qgsmapcanvassnappingutils.cpp.

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

/build/qgis-3.34.0+99sid/src/gui/qgsmapcanvassnappingutils.h
/build/qgis-3.34.0+99sid/src/gui/qgsmapcanvassnappingutils.cpp

Public Member Functions