org.piccolo2d.event

Class PMouseWheelZoomEventHandler

java.lang.Object

org.piccolo2d.event.PBasicInputEventHandler

org.piccolo2d.event.PMouseWheelZoomEventHandler

All Implemented Interfaces:

EventListener, PInputEventListener

public final class PMouseWheelZoomEventHandler
extends PBasicInputEventHandler

Zoom event handler that scales the camera view transform in response to mouse wheel events.

Since:

2.0

Constructor Summary

Constructors

Constructor and Description
PMouseWheelZoomEventHandler() Create a new mouse wheel zoom event handler.

Method Summary

Methods

Modifier and Type	Method and Description
double	getScaleFactor() Return the scale factor for this mouse wheel zoom event handler.
void	mouseWheelRotated(PInputEvent event) This method is invoked when the mouse wheel is rotated.
void	setScaleFactor(double scaleFactor) Set the scale factor for this mouse wheel zoom event handler to scaleFactor.
void	zoomAboutCanvasCenter() Switch to zoom about canvas center mode.
void	zoomAboutMouse() Switch to zoom about mouse mode.
void	zoomAboutViewCenter() Switch to zoom about view center mode.

Methods inherited from class org.piccolo2d.event.PBasicInputEventHandler

acceptsEvent, getEventFilter, keyboardFocusGained, keyboardFocusLost, keyPressed, keyReleased, keyTyped, mouseClicked, mouseDragged, mouseEntered, mouseExited, mouseMoved, mousePressed, mouseReleased, mouseWheelRotatedByBlock, processEvent, setEventFilter

Methods inherited from class java.lang.Object

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

Constructor Detail

PMouseWheelZoomEventHandler

public PMouseWheelZoomEventHandler()

Create a new mouse wheel zoom event handler.

Method Detail

getScaleFactor

public double getScaleFactor()

Return the scale factor for this mouse wheel zoom event handler. Defaults to DEFAULT_SCALE_FACTOR.

Returns:

the scale factor for this mouse wheel zoom event handler

See Also:

DEFAULT_SCALE_FACTOR

setScaleFactor

public void setScaleFactor(double scaleFactor)

Set the scale factor for this mouse wheel zoom event handler to scaleFactor.

Parameters:

scaleFactor - scale factor for this mouse wheel zoom event handler

zoomAboutMouse

public void zoomAboutMouse()

Switch to zoom about mouse mode.

See Also:

ZoomMode#ZOOM_ABOUT_MOUSE

zoomAboutCanvasCenter

public void zoomAboutCanvasCenter()

Switch to zoom about canvas center mode.

See Also:

ZoomMode#ZOOM_ABOUT_CANVAS_CENTER

zoomAboutViewCenter

public void zoomAboutViewCenter()

Switch to zoom about view center mode.

See Also:

ZoomMode#ZOOM_ABOUT_VIEW_CENTER

mouseWheelRotated

public void mouseWheelRotated(PInputEvent event)

This method is invoked when the mouse wheel is rotated. Subclasses should override this method to implement their own behavior.

Overrides:

mouseWheelRotated in class PBasicInputEventHandler

Parameters:

event - an object that can be queries to discover the event's details