This is a utility class to geographic zoom operation. More...

#include <Zoom.h>

Inheritance diagram for te::qt::widgets::Zoom:

Public Types
enum	ZoomType { In, Out }
	Defines the zoom type. More...

Public Member Functions
void	applyZoom (const QPointF &point=QPointF(), bool centralize=true)
	Performs the zoom operation on map display, considering the zoom factor, zoom type and the given point. More...

virtual void	setCursor (const QCursor &cursor)
	It sets the tool cursor. More...

void	setZoomType (const ZoomType &type)
	Sets the zoom operation type. More...

Initializer Methods
Methods related to instantiation and destruction.
	Zoom (MapDisplay display, const double &zoomFactor=2.0, const ZoomType &type=In, QObject parent=0)
	It constructs a zoom associated with the given map display. More...

virtual	~Zoom ()
	Destructor. More...

AbstractTool Methods
Methods related with tool behavior.
virtual bool	eventFilter (QObject watched, QEvent e)
	Filters events if this object has been installed as an event filter for the watched object. More...

virtual bool	mousePressEvent (QMouseEvent *e)
	This event handler can be reimplemented in a concrete tool class to receive mouse press events for the watched object. More...

virtual bool	mouseMoveEvent (QMouseEvent *e)
	This event handler can be reimplemented in a concrete tool class to receive mouse move events for the watched object. More...

virtual bool	mouseReleaseEvent (QMouseEvent *e)
	This event handler can be reimplemented in a concrete tool class to receive mouse release events for the watched object. More...

virtual bool	mouseDoubleClickEvent (QMouseEvent *e)
	This event handler can be reimplemented in a concrete tool class to receive mouse double click events for the watched object. More...

Protected Attributes
QCursor	m_cursor
	The default tool cursor. More...

MapDisplay *	m_display
	The map display associated with the tool. More...

double	m_zoomFactor
	Factor used to zoom. i.e. A factor value of 2.0 (default) will generate a new extent twice (%) bigger or smaller, depending of ZoomType. More...

ZoomType	m_zoomType
	Enum that indicates the zoom type. More...

Detailed Description

This is a utility class to geographic zoom operation.

Definition at line 49 of file Zoom.h.

Member Enumeration Documentation

enum te::qt::widgets::Zoom::ZoomType

Defines the zoom type.

Enumerator
In	Performs the zoom in operation.
Out	Performs the zoom out operation.

Definition at line 58 of file Zoom.h.

Constructor & Destructor Documentation

te::qt::widgets::Zoom::Zoom	(	MapDisplay *	display,
		const double &	zoomFactor = `2.0`,
		const ZoomType &	type = `In`,
		QObject *	parent = `0`
	)

It constructs a zoom associated with the given map display.

Parameters

display The map display associated with the zoom operation.

Note: The class will NOT take the ownership of the given pointer.

virtual te::qt::widgets::Zoom::~Zoom ( )

virtual

Destructor.

Member Function Documentation

void te::qt::widgets::Zoom::applyZoom	(	const QPointF &	point = `QPointF()`,
		bool	centralize = `true`
	)

Performs the zoom operation on map display, considering the zoom factor, zoom type and the given point.

Parameters

point	A point in world coordinates.
centralize	If the reference point is given, its possible to choose between centering this reference point or keeping it in the same position that it was.

Note: If the given point is not null, the new extent will be centered on this point. Otherwise, the current center will be kepped.

virtual bool te::qt::widgets::AbstractTool::eventFilter	(	QObject *	watched,
		QEvent *	e
	)

virtualinherited

Filters events if this object has been installed as an event filter for the watched object.

Parameters

watched	The watched object.
event	The last event sent to watched object.

Note: In your reimplementation of this function, if you want to filter the event out, i.e. stop it being handled further, return true; otherwise return false.; Here, the default implementation looks for QMouseEvents and call the pure virutal methods defined on AbstractTool class, e.g. mousePressEvent().

Reimplemented in te::qt::widgets::ZoomKeyboard, and te::qt::widgets::ZoomWheel.

virtual bool te::qt::widgets::AbstractTool::mouseDoubleClickEvent ( QMouseEvent * e )

virtualinherited

This event handler can be reimplemented in a concrete tool class to receive mouse double click events for the watched object.

Parameters

e	The mouse event.

Returns: If you want to filter the event out, i.e. stop it being handled further, return true; otherwise return false.

Note: The AbstractTool will also receive mouse press and mouse release events in addition to the double click event. It is up to the developer to ensure that the application interprets these events correctly.

Reimplemented in te::edit::VertexTool, te::qt::widgets::Measure, te::edit::SplitPolygonTool, te::edit::CreatePolygonTool, te::edit::CreateLineTool, te::edit::CreatePointTool, te::qt::widgets::PolygonAcquire, te::edit::AggregateAreaTool, te::edit::SubtractAreaTool, and te::mnt::ProfileTools.

virtual bool te::qt::widgets::AbstractTool::mouseMoveEvent ( QMouseEvent * e )

virtualinherited

This event handler can be reimplemented in a concrete tool class to receive mouse move events for the watched object.

Parameters

e	The mouse event.

Returns: If you want to filter the event out, i.e. stop it being handled further, return true; otherwise return false.

Reimplemented in te::edit::VertexTool, te::qt::widgets::Measure, te::edit::SplitPolygonTool, te::qt::widgets::Selection, te::edit::CreatePolygonTool, te::edit::DeleteGeometryByAreaTool, te::edit::MoveGeometryTool, te::edit::CreateLineTool, te::qt::widgets::PolygonAcquire, te::qt::widgets::PanExtent, te::qt::widgets::ExtentAcquire, te::edit::AggregateAreaTool, te::qt::widgets::RubberBand, te::qt::widgets::CoordTracking, te::qt::widgets::Pan, te::qt::widgets::ZoomArea, te::qt::widgets::PanMiddleClick, te::edit::SubtractAreaTool, te::mnt::ProfileTools, and te::qt::plugins::mnt::ShowValuesTool.

virtual bool te::qt::widgets::AbstractTool::mousePressEvent ( QMouseEvent * e )

virtualinherited

This event handler can be reimplemented in a concrete tool class to receive mouse press events for the watched object.

Parameters

e	The mouse event.

Returns: If you want to filter the event out, i.e. stop it being handled further, return true; otherwise return false.

Reimplemented in te::edit::VertexTool, te::qt::widgets::Measure, te::edit::SplitPolygonTool, te::qt::widgets::Selection, te::edit::CreatePolygonTool, te::edit::DeleteGeometryByAreaTool, te::edit::MoveGeometryTool, te::edit::DeleteGeometryTool, te::edit::DeletePartTool, te::edit::CreateLineTool, te::edit::CreatePointTool, te::qt::widgets::PolygonAcquire, te::qt::widgets::PanExtent, te::qt::widgets::ExtentAcquire, te::edit::AggregateAreaTool, te::qt::widgets::RubberBand, te::qt::widgets::Pan, te::qt::widgets::ZoomClick, te::qt::widgets::ZoomArea, te::qt::widgets::PanMiddleClick, te::qt::widgets::ZoomLeftAndRightClick, te::edit::SubtractAreaTool, te::edit::EditInfoTool, and te::mnt::ProfileTools.

virtual bool te::qt::widgets::AbstractTool::mouseReleaseEvent ( QMouseEvent * e )

virtualinherited

This event handler can be reimplemented in a concrete tool class to receive mouse release events for the watched object.

Parameters

e	The mouse event.

Returns: If you want to filter the event out, i.e. stop it being handled further, return true; otherwise return false.

Reimplemented in te::edit::VertexTool, te::qt::widgets::Measure, te::qt::widgets::Info, te::edit::SplitPolygonTool, te::edit::CreatePolygonTool, te::qt::widgets::Selection, te::edit::DeleteGeometryByAreaTool, te::edit::MoveGeometryTool, te::qt::widgets::PolygonAcquire, te::qt::widgets::PanExtent, te::edit::AggregateAreaTool, te::qt::widgets::ExtentAcquire, te::qt::widgets::RubberBand, te::qt::widgets::Pan, te::qt::widgets::ZoomArea, te::qt::widgets::PanMiddleClick, te::qt::widgets::PointPicker, te::edit::SubtractAreaTool, te::mnt::ProfileTools, and te::qt::widgets::ReadPixelTool.

virtual void te::qt::widgets::AbstractTool::setCursor ( const QCursor & cursor )

virtualinherited

It sets the tool cursor.

Parameters

cursor The cursor that will be used during the tool operation.

void te::qt::widgets::Zoom::setZoomType ( const ZoomType & type )

Sets the zoom operation type.

Parameters

type	The zoom operation type - ZoomIn \| ZoomOut;

Member Data Documentation

QCursor te::qt::widgets::AbstractTool::m_cursor

protectedinherited

The default tool cursor.

Definition at line 161 of file AbstractTool.h.

MapDisplay* te::qt::widgets::AbstractTool::m_display

protectedinherited

The map display associated with the tool.

Definition at line 160 of file AbstractTool.h.

double te::qt::widgets::Zoom::m_zoomFactor

protected

Factor used to zoom. i.e. A factor value of 2.0 (default) will generate a new extent twice (%) bigger or smaller, depending of ZoomType.

Definition at line 102 of file Zoom.h.

ZoomType te::qt::widgets::Zoom::m_zoomType

protected

Enum that indicates the zoom type.

Definition at line 103 of file Zoom.h.

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

/home/castejon/castejon_files/develop/terralib5/git_master/src/terralib/qt/widgets/tools/Zoom.h

Public Types

Public Member Functions

Protected Attributes

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation