com.jgraph.plaf.basic
Class BasicGraphUI.RootHandle

java.lang.Object
  com.jgraph.plaf.basic.BasicGraphUI.RootHandle

All Implemented Interfaces:

CellHandle, java.io.Serializable

Enclosing class:

BasicGraphUI

public class BasicGraphUI.RootHandle

extends java.lang.Object

implements CellHandle, java.io.Serializable

See Also:

Serialized Form

Field Summary

protected CellHandle	activeHandle The handle that consumed the last mousePressedEvent.
protected boolean	blockPaint
protected java.awt.Rectangle	cachedBounds
protected GraphContext	context
protected CellView[]	contextViews
protected ConnectionSet	disconnect
protected boolean	firstDrag
protected CellHandle[]	handles
protected boolean	isContextVisible
protected boolean	isDragging Indicates whether this handle has started drag and drop.
protected boolean	isMoving Indicates whether this handle is currently moving cells.
protected java.awt.Point	last
protected java.awt.Graphics	offgraphics
protected java.awt.Image	offscreen
protected PortView[]	portViews
protected java.awt.Point	snapLast
protected java.awt.Point	snapStart
protected java.awt.Point	start
protected CellView[]	views

Constructor Summary

BasicGraphUI.RootHandle(GraphContext ctx)
Creates a root handle which contains handles for the given cells.

Method Summary

GraphContext	getContext()
void	mouseDragged(java.awt.event.MouseEvent event) Process mouse dragged event.
void	mouseMoved(java.awt.event.MouseEvent event) Invoked when the mouse pointer has been moved on a component (with no buttons down).
void	mousePressed(java.awt.event.MouseEvent event) Messaged when a drag gesture is recogniced.
void	mouseReleased(java.awt.event.MouseEvent event) Messaged when the drag operation has terminated with a drop.
void	overlay(java.awt.Graphics g) Paint the handle on the given graphics object during mouse operations.
void	paint(java.awt.Graphics g) Paint the handle on the given graphics object once.
protected void	startDragging(java.awt.event.MouseEvent event)

Methods inherited from class java.lang.Object

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

Field Detail

offscreen

protected transient java.awt.Image offscreen

offgraphics

protected transient java.awt.Graphics offgraphics

firstDrag

protected transient boolean firstDrag

views

protected transient CellView[] views

contextViews

protected transient CellView[] contextViews

portViews

protected transient PortView[] portViews

cachedBounds

protected transient java.awt.Rectangle cachedBounds

handles

protected transient CellHandle[] handles

start

protected transient java.awt.Point start

last

protected transient java.awt.Point last

snapStart

protected transient java.awt.Point snapStart

snapLast

protected transient java.awt.Point snapLast

isMoving

protected boolean isMoving

Indicates whether this handle is currently moving cells. Start may be non-null and isMoving false while the minimum movement has not been reached.

isDragging

protected boolean isDragging

Indicates whether this handle has started drag and drop. Note: isDragging => isMoving.

activeHandle

protected transient CellHandle activeHandle

The handle that consumed the last mousePressedEvent. Initially null.

context

protected transient GraphContext context

isContextVisible

protected boolean isContextVisible

blockPaint

protected boolean blockPaint

disconnect

protected transient ConnectionSet disconnect

Constructor Detail

BasicGraphUI.RootHandle

public BasicGraphUI.RootHandle(GraphContext ctx)

Creates a root handle which contains handles for the given cells. The root handle and all its childs point to the specified JGraph instance. The root handle is responsible for dragging the selection.

Method Detail

getContext

public GraphContext getContext()

paint

public void paint(java.awt.Graphics g)

Description copied from interface: CellHandle

Paint the handle on the given graphics object once.

Specified by:

paint in interface CellHandle

Parameters:

g - the graphics object to paint the handle on

overlay

public void overlay(java.awt.Graphics g)

Description copied from interface: CellHandle

Paint the handle on the given graphics object during mouse operations.

Specified by:

overlay in interface CellHandle

Parameters:

g - the graphics object to paint the handle on

mouseMoved

public void mouseMoved(java.awt.event.MouseEvent event)

Invoked when the mouse pointer has been moved on a component (with no buttons down).

Specified by:

mouseMoved in interface CellHandle

mousePressed

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

Description copied from interface: CellHandle

Messaged when a drag gesture is recogniced.

Specified by:

mousePressed in interface CellHandle

startDragging

protected void startDragging(java.awt.event.MouseEvent event)

mouseDragged

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

Process mouse dragged event.

Specified by:

mouseDragged in interface CellHandle

Parameters:

event - the drag event to be processed

mouseReleased

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

Description copied from interface: CellHandle

Messaged when the drag operation has terminated with a drop.

Specified by:

mouseReleased in interface CellHandle