edu.umd.cs.jazz.event
Class ZPanEventHandler

java.lang.Object
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  +--edu.umd.cs.jazz.event.ZEventHandler
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        +--edu.umd.cs.jazz.event.ZPanEventHandler

public class ZPanEventHandler

extends ZEventHandler

ZPanEventHandler provides event handlers for basic panning of a Jazz camera with the left mouse. The interaction is that clicking and dragging the mouse translates the camera so that the point on the surface stays under the mouse.

Field Summary

protected int	minMovement
protected boolean	moved
protected java.awt.geom.Point2D	pressObjPt
protected java.awt.geom.Point2D	pressScreenPt

Fields inherited from class edu.umd.cs.jazz.event.ZEventHandler

activated, component, keyAdapter, mouseAdapter, mouseMotionAdapter, surface

Constructor Summary

ZPanEventHandler(java.awt.Component c, ZSurface v)
Constructs a new ZPanEventHandler.

Method Summary

void	mouseDragged(java.awt.event.MouseEvent e) Mouse drag event handler
void	mousePressed(java.awt.event.MouseEvent e) Mouse press event handler
void	mouseReleased(java.awt.event.MouseEvent e) Mouse release event handler
boolean	moved() Returns true if the most recent button press/drag/release resulted in a pan movement.

Methods inherited from class edu.umd.cs.jazz.event.ZEventHandler

activate, deactivate, getCamera, getComponent, getSurface, keyPressed, keyReleased, keyTyped, mouseMoved

Methods inherited from class java.lang.Object

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

Field Detail

minMovement

protected int minMovement

pressObjPt

protected java.awt.geom.Point2D pressObjPt

moved

protected boolean moved

pressScreenPt

protected java.awt.geom.Point2D pressScreenPt

Constructor Detail

ZPanEventHandler

public ZPanEventHandler(java.awt.Component c,
                        ZSurface v)

Constructs a new ZPanEventHandler.

Parameters:

c - The component that this event handler listens to events on

v - The surface that is panned

Method Detail

mousePressed

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

Mouse press event handler

Parameters:

e - The event.

Overrides:

mousePressed in class ZEventHandler

mouseDragged

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

Mouse drag event handler

Parameters:

e - The event.

Overrides:

mouseDragged in class ZEventHandler

mouseReleased

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

Mouse release event handler

Parameters:

e - The event.

Overrides:

mouseReleased in class ZEventHandler

moved

public boolean moved()

Returns true if the most recent button press/drag/release resulted in a pan movement.

Returns:

moved