A map tool for zooming into the map. More...

#include <qgsmaptoolzoom.h>

Inheritance diagram for QgsMapToolZoom:

[legend]

Public Member Functions
	QgsMapToolZoom (QgsMapCanvas *canvas, bool zoomOut)
	constructor

	~QgsMapToolZoom () override

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

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

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

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

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

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

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

Public Member Functions inherited from QgsMapTool
	~QgsMapTool () override

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

virtual void	activate ()
	called when set as currently active map tool

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

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

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

virtual bool	canvasToolTipEvent (QHelpEvent *e)
	Tooltip event for overriding.

virtual void	clean ()
	convenient method to clean members

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

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

virtual void	populateContextMenu (QMenu *menu)
	Allows the tool to populate and customize the given menu, prior to showing it in response to a right-mouse button click.

virtual bool	populateContextMenuWithEvent (QMenu menu, QgsMapMouseEvent event)
	Allows the tool to populate and customize the given menu, prior to showing it in response to a right-mouse button click.

virtual void	reactivate ()
	Called when the map tool is being activated while it is already active.

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

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

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

QgsPointXY	toMapCoordinates (QPoint point)
	Transforms a point from screen coordinates to map coordinates.

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

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

Protected Attributes
bool	mCanceled = false
	Flag to indicate the user has canceled the current zoom operation.

bool	mDragging
	Flag to indicate a map canvas drag operation is taking place.

int	mMinPixelZoom = 20

bool	mNativeZoomOut
	native tool

QgsRubberBand *	mRubberBand = nullptr

QCursor	mZoomInCursor

bool	mZoomOut
	indicates whether we're zooming in or out

QCursor	mZoomOutCursor

QRect	mZoomRect
	stores actual zoom rect

Protected Attributes inherited from QgsMapTool
QAction *	mAction = nullptr
	Optional pointer to an action that will be checked on map tool activation and unchecked on map tool deactivation.

QAbstractButton *	mButton = nullptr
	Optional pointer to a button that will be checked on map tool activation and unchecked on map tool deactivation.

QPointer< QgsMapCanvas >	mCanvas
	The pointer to the map canvas.

QCursor	mCursor
	The cursor used in the map tool.

QString	mToolName
	The translated name of the map tool.

Additional Inherited Members
Public Types inherited from QgsMapTool
enum	Flag { Transient = 1 << 1 , EditTool = 1 << 2 , AllowZoomRect = 1 << 3 , ShowContextMenu = 1 << 4 }
	Enumeration of flags that adjust the way the map tool operates. More...

typedef QFlags< Flag >	Flags

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

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

void	messageDiscarded ()
	emit signal to clear previous message

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

void	reactivated ()

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

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

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

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

QgsMapLayer *	layer (const QString &id)
	Returns the map layer with the matching ID, or `nullptr` if no layers could be found.

void	setToolName (const QString &name)
	Sets the tool's name.

QPoint	toCanvasCoordinates (const QgsPointXY &point) const
	Transforms a point from map coordinates to screen coordinates.

QgsPoint	toLayerCoordinates (const QgsMapLayer *layer, const QgsPoint &point)
	Transforms a point from map coordinates to layer coordinates.

QgsPointXY	toLayerCoordinates (const QgsMapLayer *layer, const QgsPointXY &point)
	Transforms a point from map coordinates to layer coordinates.

QgsRectangle	toLayerCoordinates (const QgsMapLayer *layer, const QgsRectangle &rect)
	Transforms a rect from map coordinates to layer coordinates.

QgsPointXY	toLayerCoordinates (const QgsMapLayer *layer, QPoint point)
	Transforms a point from screen coordinates to layer coordinates.

QgsPoint	toMapCoordinates (const QgsMapLayer *layer, const QgsPoint &point)
	Transforms a point from layer coordinates to map coordinates (which is different in case reprojection is used).

QgsPointXY	toMapCoordinates (const QgsMapLayer *layer, const QgsPointXY &point)
	Transforms a point from layer coordinates to map coordinates (which is different in case reprojection is used).

Detailed Description

A map tool for zooming into the map.

See also: QgsMapTool

Definition at line 30 of file qgsmaptoolzoom.h.

Constructor & Destructor Documentation

◆ QgsMapToolZoom()

QgsMapToolZoom::QgsMapToolZoom	(	QgsMapCanvas *	canvas,
		bool	zoomOut
	)

constructor

Definition at line 32 of file qgsmaptoolzoom.cpp.

◆ ~QgsMapToolZoom()

QgsMapToolZoom::~QgsMapToolZoom ( )

override

Definition at line 45 of file qgsmaptoolzoom.cpp.

Member Function Documentation

◆ canvasMoveEvent()

void QgsMapToolZoom::canvasMoveEvent ( QgsMapMouseEvent * e )

overridevirtual

Mouse move event for overriding. Default implementation does nothing.

Reimplemented from QgsMapTool.

Definition at line 55 of file qgsmaptoolzoom.cpp.

◆ canvasPressEvent()

void QgsMapToolZoom::canvasPressEvent ( QgsMapMouseEvent * e )

overridevirtual

Mouse press event for overriding. Default implementation does nothing.

Reimplemented from QgsMapTool.

Definition at line 82 of file qgsmaptoolzoom.cpp.

◆ canvasReleaseEvent()

void QgsMapToolZoom::canvasReleaseEvent ( QgsMapMouseEvent * e )

overridevirtual

Mouse release event for overriding. Default implementation does nothing.

Reimplemented from QgsMapTool.

Definition at line 92 of file qgsmaptoolzoom.cpp.

◆ deactivate()

void QgsMapToolZoom::deactivate ( )

overridevirtual

called when map tool is being deactivated

Reimplemented from QgsMapTool.

Definition at line 149 of file qgsmaptoolzoom.cpp.

◆ flags()

QgsMapTool::Flags QgsMapToolZoom::flags ( ) const

overridevirtual

Returns the flags for the map tool.

Reimplemented from QgsMapTool.

Definition at line 50 of file qgsmaptoolzoom.cpp.

◆ keyPressEvent()

void QgsMapToolZoom::keyPressEvent ( QKeyEvent * e )

overridevirtual

Key event for overriding. Default implementation does nothing.

Reimplemented from QgsMapTool.

Definition at line 166 of file qgsmaptoolzoom.cpp.

◆ keyReleaseEvent()

void QgsMapToolZoom::keyReleaseEvent ( QKeyEvent * e )

overridevirtual

Key event for overriding. Default implementation does nothing.

Reimplemented from QgsMapTool.

Definition at line 174 of file qgsmaptoolzoom.cpp.

Member Data Documentation

◆ mCanceled

bool QgsMapToolZoom::mCanceled = false

protected

Flag to indicate the user has canceled the current zoom operation.

Definition at line 62 of file qgsmaptoolzoom.h.

◆ mDragging

bool QgsMapToolZoom::mDragging

protected

Flag to indicate a map canvas drag operation is taking place.

Definition at line 59 of file qgsmaptoolzoom.h.

◆ mMinPixelZoom

int QgsMapToolZoom::mMinPixelZoom = 20

protected

Definition at line 51 of file qgsmaptoolzoom.h.

◆ mNativeZoomOut

bool QgsMapToolZoom::mNativeZoomOut

protected

native tool

Definition at line 56 of file qgsmaptoolzoom.h.

◆ mRubberBand

QgsRubberBand* QgsMapToolZoom::mRubberBand = nullptr

protected

Definition at line 64 of file qgsmaptoolzoom.h.

◆ mZoomInCursor

QCursor QgsMapToolZoom::mZoomInCursor

protected

Definition at line 67 of file qgsmaptoolzoom.h.

◆ mZoomOut

bool QgsMapToolZoom::mZoomOut

protected

indicates whether we're zooming in or out

Definition at line 54 of file qgsmaptoolzoom.h.

◆ mZoomOutCursor

QCursor QgsMapToolZoom::mZoomOutCursor

protected

Definition at line 66 of file qgsmaptoolzoom.h.

◆ mZoomRect

QRect QgsMapToolZoom::mZoomRect

protected

stores actual zoom rect

Definition at line 49 of file qgsmaptoolzoom.h.

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

/build/qgis-3.40.0+99sid/src/gui/maptools/qgsmaptoolzoom.h
/build/qgis-3.40.0+99sid/src/gui/maptools/qgsmaptoolzoom.cpp

Public Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QgsMapToolZoom()

◆ ~QgsMapToolZoom()

Member Function Documentation

◆ canvasMoveEvent()

◆ canvasPressEvent()

◆ canvasReleaseEvent()

◆ deactivate()

◆ flags()

◆ keyPressEvent()

◆ keyReleaseEvent()

Member Data Documentation

◆ mCanceled

◆ mDragging

◆ mMinPixelZoom

◆ mNativeZoomOut

◆ mRubberBand

◆ mZoomInCursor

◆ mZoomOut

◆ mZoomOutCursor

◆ mZoomRect