The QgsMapToolIdentifyFeature class is a map tool to identify a feature on a chosen layer. More...

#include <qgsmaptoolidentifyfeature.h>

Inheritance diagram for QgsMapToolIdentifyFeature:

Signals
void	featureIdentified (const QgsFeature &)

void	featureIdentified (QgsFeatureId)

Signals inherited from QgsMapToolIdentify
void	changedRasterResults (QList< QgsMapToolIdentify::IdentifyResult > &)

void	identifyMessage (const QString &)

void	identifyProgress (int, int)

Signals inherited from QgsMapTool
void	activated ()
	signal emitted once the map tool is activated More...

void	deactivated ()
	signal emitted once the map tool is deactivated More...

void	messageDiscarded ()
	emit signal to clear previous message More...

void	messageEmitted (const QString &message, Qgis::MessageLevel=Qgis::Info)
	emit a message More...

Public Member Functions
	QgsMapToolIdentifyFeature (QgsMapCanvas canvas, QgsVectorLayer vl=nullptr)
	QgsMapToolIdentifyFeature is a map tool to identify a feature on a chosen layer. More...

void	canvasReleaseEvent (QgsMapMouseEvent *e) override
	Mouse release event for overriding. Default implementation does nothing. More...

void	setLayer (QgsVectorLayer *vl)
	change the layer used by the map tool to identify More...

Public Member Functions inherited from QgsMapToolIdentify
	QgsMapToolIdentify (QgsMapCanvas *canvas)
	constructor More...

	~QgsMapToolIdentify () override

void	activate () override
	called when set as currently active map tool More...

void	canvasMoveEvent (QgsMapMouseEvent *e) override
	Mouse move event for overriding. Default implementation does nothing. More...

void	canvasPressEvent (QgsMapMouseEvent *e) override
	Mouse press event for overriding. Default implementation does nothing. More...

void	deactivate () override
	called when map tool is being deactivated More...

Flags	flags () const override
	Returns the flags for the map tool. More...

QList< QgsMapToolIdentify::IdentifyResult >	identify (int x, int y, const QList< QgsMapLayer > &layerList=QList< QgsMapLayer >(), IdentifyMode mode=DefaultQgsSetting)
	Performs the identification. More...

QList< QgsMapToolIdentify::IdentifyResult >	identify (int x, int y, IdentifyMode mode, LayerType layerType=AllLayers)
	Performs the identification. More...

QList< QgsMapToolIdentify::IdentifyResult >	identify (const QgsGeometry &geometry, IdentifyMode mode, LayerType layerType)
	Performs identification based on a geometry (in map coordinates) More...

QList< QgsMapToolIdentify::IdentifyResult >	identify (const QgsGeometry &geometry, IdentifyMode mode, const QList< QgsMapLayer *> &layerList, LayerType layerType)
	Performs identification based on a geometry (in map coordinates) More...

QgsIdentifyMenu *	identifyMenu ()
	Returns a pointer to the identify menu which will be used in layer selection mode this menu can also be customized. More...

Public Member Functions inherited from QgsMapTool
	~QgsMapTool () override

QAction *	action ()
	Returns associated action with map tool or `nullptr` if no action is associated. More...

QAbstractButton *	button ()
	Returns associated button with map tool or `nullptr` if no button is associated. More...

QgsMapCanvas *	canvas () const
	returns pointer to the tool's map canvas More...

virtual void	canvasDoubleClickEvent (QgsMapMouseEvent *e)
	Mouse double-click event for overriding. Default implementation does nothing. More...

virtual void	clean ()
	convenient method to clean members More...

virtual bool	gestureEvent (QGestureEvent *e)
	gesture event for overriding. Default implementation does nothing. More...

bool	isActive () const
	Returns if the current map tool active on the map canvas. More...

virtual void	keyReleaseEvent (QKeyEvent *e)
	Key event for overriding. Default implementation does nothing. More...

void	setAction (QAction *action)
	Use this to associate a QAction to this maptool. More...

void	setButton (QAbstractButton *button)
	Use this to associate a button to this maptool. More...

virtual void	setCursor (const QCursor &cursor)
	Sets a user defined cursor. More...

QString	toolName ()
	Emit map tool changed with the old tool. More...

virtual void	wheelEvent (QWheelEvent *e)
	Mouse wheel event for overriding. Default implementation does nothing. More...

Protected Member Functions
void	keyPressEvent (QKeyEvent *e) override
	Key event for overriding. Default implementation does nothing. More...

Protected Member Functions inherited from QgsMapToolIdentify
QMap< QString, QString >	derivedAttributesForPoint (const QgsPoint &point)
	Returns derived attributes map for a clicked point in map coordinates. May be 2D or 3D point. More...

QList< QgsMapToolIdentify::IdentifyResult >	identify (int x, int y, IdentifyMode mode, const QList< QgsMapLayer *> &layerList, LayerType layerType=AllLayers)
	Performs the identification. More...

bool	identifyLayer (QList< QgsMapToolIdentify::IdentifyResult > results, QgsMapLayer layer, const QgsPointXY &point, const QgsRectangle &viewExtent, double mapUnitsPerPixel, QgsMapToolIdentify::LayerType layerType=AllLayers)
	Call the right method depending on layer type. More...

bool	identifyMeshLayer (QList< QgsMapToolIdentify::IdentifyResult > results, QgsMeshLayer layer, const QgsPointXY &point)
	Identifies data from active scalar and vector dataset from the mesh layer. More...

bool	identifyRasterLayer (QList< QgsMapToolIdentify::IdentifyResult > results, QgsRasterLayer layer, QgsPointXY point, const QgsRectangle &viewExtent, double mapUnitsPerPixel)

bool	identifyVectorLayer (QList< QgsMapToolIdentify::IdentifyResult > results, QgsVectorLayer layer, const QgsPointXY &point)

void	restoreCanvasPropertiesOverrides ()
	Clears canvas properties overrides previously set with setCanvasPropertiesOverrides() More...

void	setCanvasPropertiesOverrides (double searchRadiusMapUnits)
	Overrides some map canvas properties inside the map tool for the upcoming identify requests. More...

Protected Member Functions inherited from QgsMapTool
	QgsMapTool (QgsMapCanvas *canvas)
	constructor takes map canvas as a parameter More...

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

QgsPointXY	toLayerCoordinates (const QgsMapLayer *layer, QPoint point)
	transformation from screen coordinates to layer's coordinates More...

QgsPointXY	toLayerCoordinates (const QgsMapLayer *layer, const QgsPointXY &point)
	transformation from map coordinates to layer's coordinates More...

QgsRectangle	toLayerCoordinates (const QgsMapLayer *layer, const QgsRectangle &rect)
	trnasformation of the rect from map coordinates to layer's coordinates More...

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

QgsPointXY	toMapCoordinates (const QgsMapLayer *layer, const QgsPointXY &point)
	transformation from layer's coordinates to map coordinates (which is different in case reprojection is used) More...

QgsPoint	toMapCoordinates (const QgsMapLayer *layer, const QgsPoint &point)
	transformation from layer's coordinates to map coordinates (which is different in case reprojection is used) More...

Additional Inherited Members
Public Types inherited from QgsMapToolIdentify
enum	IdentifyMode { DefaultQgsSetting = -1, ActiveLayer, TopDownStopAtFirst, TopDownAll, LayerSelection }

enum	Type { VectorLayer = 1, RasterLayer = 2, MeshLayer = 4, AllLayers = VectorLayer \| RasterLayer \| MeshLayer }

Public Types inherited from QgsMapTool
enum	Flag { Transient = 1 << 1, EditTool = 1 << 2, AllowZoomRect = 1 << 3 }
	Enumeration of flags that adjust the way the map tool operates. More...

Public Slots inherited from QgsMapToolIdentify
void	formatChanged (QgsRasterLayer *layer)

Static Public Member Functions inherited from QgsMapTool
static double	searchRadiusMM ()
	Gets search radius in mm. More...

static double	searchRadiusMU (const QgsRenderContext &context)
	Gets search radius in map units for given context. More...

static double	searchRadiusMU (QgsMapCanvas *canvas)
	Gets search radius in map units for given canvas. More...

Protected Attributes inherited from QgsMapToolIdentify
QgsIdentifyMenu *	mIdentifyMenu = nullptr

Protected Attributes inherited from QgsMapTool
QAction *	mAction = nullptr
	optionally map tool can have pointer to action which will be used to set that action as active More...

QAbstractButton *	mButton = nullptr
	optionally map tool can have pointer to a button which will be used to set that action as active More...

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

QCursor	mCursor
	cursor used in map tool More...

QString	mToolName
	translated name of the map tool More...

Detailed Description

The QgsMapToolIdentifyFeature class is a map tool to identify a feature on a chosen layer.

Once the map tool is enable, user can click on the map canvas to identify a feature. A signal will then be emitted.

Definition at line 28 of file qgsmaptoolidentifyfeature.h.

Constructor & Destructor Documentation

◆ QgsMapToolIdentifyFeature()

QgsMapToolIdentifyFeature::QgsMapToolIdentifyFeature	(	QgsMapCanvas *	canvas,
		QgsVectorLayer *	vl = `nullptr`
	)

QgsMapToolIdentifyFeature is a map tool to identify a feature on a chosen layer.

Parameters

canvas	the map canvas
vl	the vector layer. The map tool can be initialized without any layer and can be set afterward.

Definition at line 21 of file qgsmaptoolidentifyfeature.cpp.

Member Function Documentation

◆ canvasReleaseEvent()

void QgsMapToolIdentifyFeature::canvasReleaseEvent ( QgsMapMouseEvent * e )

overridevirtual

Mouse release event for overriding. Default implementation does nothing.

Reimplemented from QgsMapToolIdentify.

Definition at line 32 of file qgsmaptoolidentifyfeature.cpp.

◆ featureIdentified [1/2]

void QgsMapToolIdentifyFeature::featureIdentified ( const QgsFeature & )

signal

◆ featureIdentified [2/2]

void QgsMapToolIdentifyFeature::featureIdentified ( QgsFeatureId )

signal

◆ keyPressEvent()

void QgsMapToolIdentifyFeature::keyPressEvent ( QKeyEvent * e )

overrideprotectedvirtual

Key event for overriding. Default implementation does nothing.

Reimplemented from QgsMapTool.

Definition at line 47 of file qgsmaptoolidentifyfeature.cpp.

◆ setLayer()

void QgsMapToolIdentifyFeature::setLayer ( QgsVectorLayer * vl )

inline

change the layer used by the map tool to identify

Definition at line 42 of file qgsmaptoolidentifyfeature.h.

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

/build/qgis-3.10.0+15buster/src/gui/qgsmaptoolidentifyfeature.h
/build/qgis-3.10.0+15buster/src/gui/qgsmaptoolidentifyfeature.cpp

Signals

Public Member Functions

Protected Member Functions

Additional Inherited Members