org.gvsig.app.project.documents.view.toolListeners

Class MapOverviewChangeZoomListener

java.lang.Object

org.gvsig.app.project.documents.view.toolListeners.MapOverviewChangeZoomListener

All Implemented Interfaces:

PanListener, RectangleListener, ToolListener

public class MapOverviewChangeZoomListener
extends java.lang.Object
implements RectangleListener, PanListener

Listener for changes of the zoom caused by selecting a rectangular area on the associated MapOverview object with the first button of the mouse.

If the kind of action was a movement on the associated object, updates the extent of its rectangular area.

If the kind of action is the selection of a rectangular area, and is bigger than 3x3 pixels, applies a zoom in operation centering its ViewPort according the equivalent extent in map coordinates.

See Also:

ViewPort

Field Summary

Fields

Modifier and Type	Field and Description
protected MapControl	mapControl Reference to the MapControl object that uses.

Constructor Summary

Constructors

Constructor and Description
MapOverviewChangeZoomListener(MapControl mapControl) Creates a new listener for changes of zoom at the associated MapOverview object.

Method Summary

Modifier and Type	Method and Description
boolean	cancelDrawing() Determines if the drawing process that this tool executes on the MapControl instance could be canceled or not.
java.awt.Image	getImageCursor() Gets the Cursor associated to this tool.
void	move(MoveEvent event) Called when user drags the mouse on the view.
void	rectangle(EnvelopeEvent event) Called when user executes a double click with the mouse, finishing the drawn of the rectangle.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

mapControl

protected MapControl mapControl

Reference to the MapControl object that uses.

Constructor Detail

MapOverviewChangeZoomListener

public MapOverviewChangeZoomListener(MapControl mapControl)

Creates a new listener for changes of zoom at the associated MapOverview object.

Parameters:

mapControl - the MapControl object which represents the MapOverview

Method Detail

rectangle

public void rectangle(EnvelopeEvent event)
               throws BehaviorException

Description copied from interface: RectangleListener

Called when user executes a double click with the mouse, finishing the drawn of the rectangle.

All features of the active and vector layers of the associated MapControl object that their area intersect with the polygonal area defined in the event, will be selected.

Specified by:

rectangle in interface RectangleListener

Parameters:

event - mouse event and information about the rectangle defined

Throws:

BehaviorException - will be thrown when fails the process of this tool

getImageCursor

public java.awt.Image getImageCursor()

Description copied from interface: ToolListener

Gets the Cursor associated to this tool.

Specified by:

getImageCursor in interface ToolListener

Returns:

component with the bitmap associated to this tool

cancelDrawing

public boolean cancelDrawing()

Description copied from interface: ToolListener

Determines if the drawing process that this tool executes on the MapControl instance could be canceled or not.

Specified by:

cancelDrawing in interface ToolListener

Returns:

true if is cancellable; otherwise returns false

move

public void move(MoveEvent event)
          throws BehaviorException

Description copied from interface: PanListener

Called when user drags the mouse on the view.

Updates the extent coordinates according to the direction of the movement between the initial and final points of line determined by the move of the mouse.

Specified by:

move in interface PanListener

Parameters:

event - mouse event information about the initial and final positions of the movement

Throws:

BehaviorException - will be thrown when fails the process of this tool