org.geotools.gui.tools
Class PanToolImpl

java.lang.Object
  org.geotools.gui.tools.AbstractTool
      org.geotools.gui.tools.PanToolImpl

All Implemented Interfaces:

java.util.EventListener, java.awt.event.MouseListener, java.awt.event.MouseMotionListener, PanTool, Tool

Direct Known Subclasses:

ClickPanToolImpl, ZoomToolImpl

public class PanToolImpl

extends AbstractTool

implements PanTool

Provides both Click/Pan and Drap/Pan functionality. Processes MouseEvents on behalf of MapPanel and constructs a CordinateTransform for the map's Context.

Version:

$Revision: 1.20 $

Author:

$author$

Field Summary

protected CoordinatePoint	pressPoint The Mouse button press down point in a click/drag operation
protected CoordinatePoint	releasePoint The Mouse button release point in a click/drag operation

Fields inherited from class org.geotools.gui.tools.AbstractTool

context

Constructor Summary

PanToolImpl()
Construct a PanTool.

Method Summary

void	addMouseListener(java.awt.Component component, MapContext context) Register this tool to receive MouseEvents from component.
void	addMouseMotionListener(java.awt.Component component, MapContext context)
protected void	applyZoomTransform(CoordinatePoint midPoint, double inverseZoomFactor) Calculate a transform based on the new midpoint and zoomFactor.
void	mouseClicked(java.awt.event.MouseEvent e) Process Click and Drag Pan.
void	mousePressed(java.awt.event.MouseEvent e) Set the press point in a click-drag operation.
void	mouseReleased(java.awt.event.MouseEvent e) Set the release point in a click-drag operation and process the drag operation.

Methods inherited from class org.geotools.gui.tools.AbstractTool

addMouseListener, addMouseMotionListener, destroy, getContext, getCursor, getName, mouseDragged, mouseEntered, mouseExited, mouseMoved, paint, removeMouseListeners, setCursor, setName, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.geotools.gui.tools.Tool

destroy, getContext, getCursor, getName, paint, removeMouseListeners, setCursor, setName

Field Detail

pressPoint

protected CoordinatePoint pressPoint

The Mouse button press down point in a click/drag operation

releasePoint

protected CoordinatePoint releasePoint

The Mouse button release point in a click/drag operation

Constructor Detail

PanToolImpl

public PanToolImpl()

Construct a PanTool.

Method Detail

mouseClicked

public void mouseClicked(java.awt.event.MouseEvent e)

Process Click and Drag Pan.

Specified by:

mouseClicked in interface java.awt.event.MouseListener

Overrides:

mouseClicked in class AbstractTool

Parameters:

e - The mouse clicked event.

applyZoomTransform

protected void applyZoomTransform(CoordinatePoint midPoint,
                                  double inverseZoomFactor)

Calculate a transform based on the new midpoint and zoomFactor. ZoomFactor will be 1 for Pan, anything for Zoom.

Parameters:

midPoint - The midPoint of the new AreaOfInterest

inverseZoomFactor - The inverse of the zoomFactor to zoom by, inverseZoomFactor=0.5 means zoom in.

mousePressed

public void mousePressed(java.awt.event.MouseEvent e)

Set the press point in a click-drag operation.

Specified by:

mousePressed in interface java.awt.event.MouseListener

Overrides:

mousePressed in class AbstractTool

Parameters:

e - contains the mouse click.

mouseReleased

public void mouseReleased(java.awt.event.MouseEvent e)

Set the release point in a click-drag operation and process the drag operation.

Specified by:

mouseReleased in interface java.awt.event.MouseListener

Overrides:

mouseReleased in class AbstractTool

Parameters:

e - contains the mouse click.

addMouseListener

public void addMouseListener(java.awt.Component component,
                             MapContext context)

Register this tool to receive MouseEvents from component.

Specified by:

addMouseListener in interface Tool

Parameters:

component - The tool will process mouseEvents from this component.

context - The Context that will be changed by this Tool.

addMouseMotionListener

public void addMouseMotionListener(java.awt.Component component,
                                   MapContext context)
                            throws java.lang.IllegalArgumentException

Specified by:

addMouseMotionListener in interface Tool

Throws:

java.lang.IllegalArgumentException