QgsMapToolZoom Class Reference

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

#include <qgsmaptoolzoom.h>

Inheritance diagram for QgsMapToolZoom:

Collaboration diagram for QgsMapToolZoom:

Public Member Functions
	QgsMapToolZoom (QgsMapCanvas *canvas, bool zoomOut)
	constructor
	~QgsMapToolZoom ()
virtual void	canvasMoveEvent (QMouseEvent *e)
	Overridden mouse move event.
virtual void	canvasPressEvent (QMouseEvent *e)
	Overridden mouse press event.
virtual void	canvasReleaseEvent (QMouseEvent *e)
	Overridden mouse release event.
virtual bool	isTransient ()
	Check whether this MapTool performs a zoom or pan operation.
virtual void	deactivate ()
	called when map tool is being deactivated
Public Member Functions inherited from QgsMapTool
virtual	~QgsMapTool ()
	virtual destructor
virtual void	canvasDoubleClickEvent (QMouseEvent *e)
	Mouse double click event for overriding. Default implementation does nothing.
virtual void	wheelEvent (QWheelEvent *e)
	Mouse wheel event for overriding.
virtual void	keyPressEvent (QKeyEvent *e)
	Key event for overriding. Default implementation does nothing.
virtual void	keyReleaseEvent (QKeyEvent *e)
	Key event for overriding.
virtual void	renderComplete ()
	Called when rendering has finished. Default implementation does nothing.
void	setAction (QAction *action)
	Use this to associate a QAction to this maptool.
QAction *	action ()
	Return associated action with map tool or NULL if no action is associated.
void	setButton (QAbstractButton *button)
	Use this to associate a button to this maptool.
QAbstractButton *	button ()
	Return associated button with map tool or NULL if no button is associated.
virtual void	setCursor (QCursor cursor)
	Set a user defined cursor.
virtual bool	isEditTool ()
	Check whether this MapTool performs an edit operation.
virtual void	activate ()
	called when set as currently active map tool
QgsMapCanvas *	canvas ()
	returns pointer to the tool's map canvas

Protected Attributes
QRect	mZoomRect
	stores actual zoom rect
bool	mZoomOut
	indicates whether we're zooming in or out
bool	mDragging
	Flag to indicate a map canvas drag operation is taking place.
QgsRubberBand *	mRubberBand
Protected Attributes inherited from QgsMapTool
QgsMapCanvas *	mCanvas
	pointer to map canvas
QCursor	mCursor
	cursor used in map tool
QAction *	mAction
	optionally map tool can have pointer to action which will be used to set that action as active
QAbstractButton *	mButton
	optionally map tool can have pointer to a button which will be used to set that action as active

Additional Inherited Members
Protected Member Functions inherited from QgsMapTool
	QgsMapTool (QgsMapCanvas *canvas)
	constructor takes map canvas as a parameter
QgsPoint	toMapCoordinates (const QPoint &point)
	transformation from screen coordinates to map coordinates
QgsPoint	toLayerCoordinates (QgsMapLayer *layer, const QPoint &point)
	transformation from screen coordinates to layer's coordinates
QgsPoint	toLayerCoordinates (QgsMapLayer *layer, const QgsPoint &point)
	transformation from map coordinates to layer's coordinates
QgsPoint	toMapCoordinates (QgsMapLayer *layer, const QgsPoint &point)
	transformation from layer's coordinates to map coordinates (which is different in case reprojection is used)
QgsRectangle	toLayerCoordinates (QgsMapLayer *layer, const QgsRectangle &rect)
	trnasformation of the rect from map coordinates to layer's coordinates
QPoint	toCanvasCoordinates (const QgsPoint &point)
	transformation from map coordinates to screen coordinates

Detailed Description

A map tool for zooming into the map.

See Also

QgsMapTool

Definition at line 28 of file qgsmaptoolzoom.h.

Constructor & Destructor Documentation

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

constructor

Definition at line 29 of file qgsmaptoolzoom.cpp.

References QgsMapTool::mCursor, zoom_in, and zoom_out.

QgsMapToolZoom::~QgsMapToolZoom

(

)

Definition at line 37 of file qgsmaptoolzoom.cpp.

References mRubberBand.

Member Function Documentation

void QgsMapToolZoom::canvasMoveEvent ( QMouseEvent *  e )

virtual

Overridden mouse move event.

Reimplemented from QgsMapTool.

Definition at line 43 of file qgsmaptoolzoom.cpp.

References QgsMapTool::mCanvas, mDragging, mRubberBand, mZoomRect, QGis::Polygon, and QgsRubberBand::setToCanvasRectangle().

void QgsMapToolZoom::canvasPressEvent ( QMouseEvent *  e )

virtual

Overridden mouse press event.

Reimplemented from QgsMapTool.

Definition at line 64 of file qgsmaptoolzoom.cpp.

References mZoomRect.

void QgsMapToolZoom::canvasReleaseEvent ( QMouseEvent *  e )

virtual

Overridden mouse release event.

Reimplemented from QgsMapTool.

Definition at line 73 of file qgsmaptoolzoom.cpp.

References QgsRectangle::center(), QgsMapCanvas::extent(), QgsMapCanvas::getCoordinateTransform(), QgsRectangle::height(), QgsMapTool::mCanvas, mDragging, mRubberBand, mZoomOut, mZoomRect, QgsRectangle::normalize(), QgsDebugMsg, QgsMapCanvas::refresh(), QgsRectangle::scale(), QgsMapCanvas::setExtent(), QgsRectangle::setXMaximum(), QgsRectangle::setXMinimum(), QgsRectangle::setYMaximum(), QgsRectangle::setYMinimum(), QgsMapToPixel::toMapCoordinates(), QgsRectangle::toString(), QgsPoint::toString(), QgsRectangle::width(), QgsPoint::x(), QgsPoint::y(), and QgsMapCanvas::zoomWithCenter().

void QgsMapToolZoom::deactivate ( )

virtual

called when map tool is being deactivated

Reimplemented from QgsMapTool.

Definition at line 149 of file qgsmaptoolzoom.cpp.

References mRubberBand.

virtual bool QgsMapToolZoom::isTransient ( )

inlinevirtual

Check whether this MapTool performs a zoom or pan operation.

If it does, we will be able to perform the zoom and then resume operations with the original / previously used tool.

Reimplemented from QgsMapTool.

Definition at line 45 of file qgsmaptoolzoom.h.

Member Data Documentation

bool QgsMapToolZoom::mDragging

protected

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

Definition at line 57 of file qgsmaptoolzoom.h.

Referenced by canvasMoveEvent(), and canvasReleaseEvent().

QgsRubberBand* QgsMapToolZoom::mRubberBand

protected

Definition at line 59 of file qgsmaptoolzoom.h.

Referenced by canvasMoveEvent(), canvasReleaseEvent(), deactivate(), and ~QgsMapToolZoom().

bool QgsMapToolZoom::mZoomOut

protected

indicates whether we're zooming in or out

Definition at line 54 of file qgsmaptoolzoom.h.

Referenced by canvasReleaseEvent().

QRect QgsMapToolZoom::mZoomRect

protected

stores actual zoom rect

Definition at line 51 of file qgsmaptoolzoom.h.

Referenced by canvasMoveEvent(), canvasPressEvent(), and canvasReleaseEvent().

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

• /tmp/buildd/qgis-2.0.1/src/gui/qgsmaptoolzoom.h
• /tmp/buildd/qgis-2.0.1/src/gui/qgsmaptoolzoom.cpp