: Class ZoomEventHandlerRightButton

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edu.umd.cs.jazz.event
Class ZoomEventHandlerRightButton

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

public class ZoomEventHandlerRightButton
extends ZEventHandler

ZoomEventhandlerRightButton provides event handlers for basic zooming of a Jazz camera with the right button. The interaction is that the initial mouse press defines the zoom anchor point, and then moving the mouse to the right zooms with a speed proportional to the amount the mouse is moved to the right of the anchor point. Similarly, if the mouse is moved to the left, the the camera is zoomed out.

Field Summary
`protected float`	`maxMag`
`protected float`	`minMag`
`protected java.awt.geom.Point2D`	`pressObjPt`
`protected float`	`pressWinX`
`protected float`	`scaleDelta`
`protected boolean`	`zooming`

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

activated,  
component,  
keyAdapter,  
mouseAdapter,  
mouseMotionAdapter,  
surface

Constructor Summary
`ZoomEventHandlerRightButton(java.awt.Component c, ZSurface v)` Constructs a new ZoomEventHandlerRightButton.

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
`void`	`setMaxMagnification(float newMaxMag)` Set the maximum magnification that the camera can be set to with this event handler.
`void`	`setMinMagnification(float newMinMag)` Set the minimum magnification that the camera can be set to with this event handler.
`void`	`startZooming()` Start animated zooming.
`void`	`stopZooming()` Stop animated zooming.
`void`	`zoomOneStep()` Do one zooming step, sleep a short amount, and schedule the next zooming step.

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

scaleDelta

protected float scaleDelta

pressWinX

protected float pressWinX

pressObjPt

protected java.awt.geom.Point2D pressObjPt

zooming

protected boolean zooming

minMag

protected float minMag

maxMag

protected float maxMag

Constructor Detail

ZoomEventHandlerRightButton

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

Constructs a new ZoomEventHandlerRightButton.

Parameters:: c - The component that this event handler listens to events on; v - The camera 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

startZooming

public void startZooming()

Start animated zooming.

setMinMagnification

public void setMinMagnification(float newMinMag)

Set the minimum magnification that the camera can be set to with this event handler. Setting the min mag to <= 0 disables this feature. If the min mag if set to a value which is greater than the current camera magnification, then the camera is left at its current magnification.

Parameters:: newMinMag - the new minimum magnification

setMaxMagnification

public void setMaxMagnification(float newMaxMag)

Set the maximum magnification that the camera can be set to with this event handler. Setting the max mag to <= 0 disables this feature. If the max mag if set to a value which is less than the current camera magnification, then the camera is left at its current magnification.

Parameters:: newMaxMag - the new maximum magnification

stopZooming

public void stopZooming()

Stop animated zooming.

zoomOneStep

public void zoomOneStep()

Do one zooming step, sleep a short amount, and schedule the next zooming step. This effectively continuously zooms while still accepting input events so that the zoom center point can be changed, and zooming can be stopped.