Class LensTranslatingGraphMousePlugin

java.lang.Object

edu.uci.ics.jung.visualization.control.AbstractGraphMousePlugin

edu.uci.ics.jung.visualization.control.TranslatingGraphMousePlugin

edu.uci.ics.jung.visualization.control.LensTranslatingGraphMousePlugin

All Implemented Interfaces:

GraphMousePlugin, MouseListener, MouseMotionListener, EventListener

public class LensTranslatingGraphMousePlugin
extends TranslatingGraphMousePlugin
implements MouseListener, MouseMotionListener

Extends TranslatingGraphMousePlugin and adds the capability to drag and resize the viewing lens in the graph view. Mouse1 in the center moves the lens, mouse1 on the edge resizes the lens. The default mouse button and modifiers can be overridden in the constructor.

Field Summary

Fields

Modifier and Type	Field	Description
protected boolean	dragOnEdge
protected boolean	dragOnLens
protected double	edgeOffset

Fields inherited from class AbstractGraphMousePlugin

cursor, down, modifiers

Constructor Summary

Constructors

Constructor	Description
LensTranslatingGraphMousePlugin()	create an instance with default modifiers
LensTranslatingGraphMousePlugin(int modifiers)	create an instance with passed modifer value

Method Summary

Modifier and Type	Method	Description
void	mouseDragged(MouseEvent e)	check the modifiers.
void	mousePressed(MouseEvent e)	Check the event modifiers.
void	mouseReleased(MouseEvent e)	unset the 'down' point and change the cursoe back to the system default cursor
private void	setViewCenter(MutableTransformer transformer, Point2D point)	called to change the location of the lens
private void	setViewRadius(MutableTransformer transformer, Point2D point)	called to change the radius of the lens
private void	testViewCenter(MutableTransformer transformer, Point2D point)	called to set up translating the lens center or changing the size

Methods inherited from class TranslatingGraphMousePlugin

mouseClicked, mouseEntered, mouseExited, mouseMoved

Methods inherited from class AbstractGraphMousePlugin

checkModifiers, getCursor, getModifiers, setCursor, setModifiers

Methods inherited from class Object

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

Methods inherited from interface MouseListener

mouseClicked, mouseEntered, mouseExited

Methods inherited from interface MouseMotionListener

mouseMoved

Field Details

dragOnLens

protected boolean dragOnLens

dragOnEdge

protected boolean dragOnEdge

edgeOffset

protected double edgeOffset

Constructor Details

LensTranslatingGraphMousePlugin

public LensTranslatingGraphMousePlugin()

create an instance with default modifiers

LensTranslatingGraphMousePlugin

public LensTranslatingGraphMousePlugin(int modifiers)

create an instance with passed modifer value

Parameters:

modifiers - the mouse event modifier to activate this function

Method Details

mousePressed

public void mousePressed(MouseEvent e)

Check the event modifiers. Set the 'down' point for later use. If this event satisfies the modifiers, change the cursor to the system 'move cursor'

Specified by:

mousePressed in interface MouseListener

Overrides:

mousePressed in class TranslatingGraphMousePlugin

Parameters:

e - the event

setViewCenter

private void setViewCenter(MutableTransformer transformer,
 Point2D point)

called to change the location of the lens

Parameters:

point -

Function -

setViewRadius

private void setViewRadius(MutableTransformer transformer,
 Point2D point)

called to change the radius of the lens

Parameters:

point -

Function -

testViewCenter

private void testViewCenter(MutableTransformer transformer,
 Point2D point)

called to set up translating the lens center or changing the size

Parameters:

point -

Function -

mouseReleased

public void mouseReleased(MouseEvent e)

unset the 'down' point and change the cursoe back to the system default cursor

Specified by:

mouseReleased in interface MouseListener

Overrides:

mouseReleased in class TranslatingGraphMousePlugin

mouseDragged

public void mouseDragged(MouseEvent e)

check the modifiers. If accepted, move or resize the lens according to the dragging of the mouse pointer

Specified by:

mouseDragged in interface MouseMotionListener

Overrides:

mouseDragged in class TranslatingGraphMousePlugin

Parameters:

e - the event