gograph.base.graph
Class GGMarqueeHandler

java.lang.Object
  |
  +--org.jgraph.graph.BasicMarqueeHandler
        |
        +--gograph.base.graph.GGMarqueeHandler

public class GGMarqueeHandler

extends org.jgraph.graph.BasicMarqueeHandler

MarqueeHandler that connects vertices and displays popupmenus.

See Also:

GoGraph

Field Summary

protected java.awt.Point	current
protected org.jgraph.graph.PortView	firstPort Holds the first and the current port.
protected GoGraph	gograph Access back to GoGraph panel.
protected org.jgraph.graph.PortView	port
protected java.awt.Point	start Holds the start and the current point.

Fields inherited from class org.jgraph.graph.BasicMarqueeHandler

currentPoint, marqueeBounds, previousCursor, startPoint

Constructor Summary

GGMarqueeHandler(GoGraph gograph)
Creates a new instance of GGMarqueeHandler.

Method Summary

javax.swing.JPopupMenu	createPopupMenu(java.awt.Point pt, java.lang.Object cell) Creates a JPopupMenu containing context available actions.
org.jgraph.graph.Port[]	getConnectingPorts() Returns the two selected ports for connection
org.jgraph.graph.PortView	getSourcePortAt(java.awt.Point point) Find a cell at point and return its first port as a PortView.
protected org.jgraph.graph.PortView	getTargetPortAt(java.awt.Point point) Find a cell at point and return its first port as a PortView.
boolean	isForceMarqueeEvent(java.awt.event.MouseEvent e) Override to gain control (for popupMenu and connectMode).
void	mouseDragged(java.awt.event.MouseEvent e) Find port under mouse and repaint connector.
void	mouseMoved(java.awt.event.MouseEvent e) Show special cursor if over port.
void	mousePressed(java.awt.event.MouseEvent e) Display popupMenu or remember start location and first port.
void	mouseReleased(java.awt.event.MouseEvent e) Connect the first port and the current port in the graph or repaint.
protected void	paintConnector(java.awt.Color fg, java.awt.Color bg, java.awt.Graphics g) Use xor-mode on graphics to paint connector.
protected void	paintPort(java.awt.Graphics g) Use the preview flag to draw a highlighted port.

Methods inherited from class org.jgraph.graph.BasicMarqueeHandler

getCurrentPoint, getMarqueeBounds, getPreviousCursor, getStartPoint, overlay, paint, setCurrentPoint, setMarqueeBounds, setPreviousCursor, setStartPoint

Methods inherited from class java.lang.Object

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

Field Detail

gograph

protected GoGraph gograph

Access back to GoGraph panel.

start

protected java.awt.Point start

Holds the start and the current point.

current

protected java.awt.Point current

firstPort

protected org.jgraph.graph.PortView firstPort

Holds the first and the current port.

port

protected org.jgraph.graph.PortView port

Constructor Detail

GGMarqueeHandler

public GGMarqueeHandler(GoGraph gograph)

Creates a new instance of GGMarqueeHandler.

Parameters:

gograph - Access back to GoGraph panel.

Method Detail

isForceMarqueeEvent

public boolean isForceMarqueeEvent(java.awt.event.MouseEvent e)

Override to gain control (for popupMenu and connectMode).

Overrides:

isForceMarqueeEvent in class org.jgraph.graph.BasicMarqueeHandler

Parameters:

e - Source mouse event.

Returns:

True if this handler should be preferred over other handlers.

mousePressed

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

Display popupMenu or remember start location and first port.

Overrides:

mousePressed in class org.jgraph.graph.BasicMarqueeHandler

Parameters:

e - Source mouse event.

mouseDragged

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

Find port under mouse and repaint connector.

Overrides:

mouseDragged in class org.jgraph.graph.BasicMarqueeHandler

Parameters:

e - Source mouse event.

getSourcePortAt

public org.jgraph.graph.PortView getSourcePortAt(java.awt.Point point)

Find a cell at point and return its first port as a PortView.

Parameters:

point - Point where port is.

Returns:

Found PortView.

getTargetPortAt

protected org.jgraph.graph.PortView getTargetPortAt(java.awt.Point point)

Find a cell at point and return its first port as a PortView.

Parameters:

point - Point where cell is.

Returns:

Found PortView.

mouseReleased

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

Connect the first port and the current port in the graph or repaint.

Overrides:

mouseReleased in class org.jgraph.graph.BasicMarqueeHandler

Parameters:

e - Source mouse event.

mouseMoved

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

Show special cursor if over port.

Overrides:

mouseMoved in class org.jgraph.graph.BasicMarqueeHandler

Parameters:

e - Source mouse event.

paintConnector

protected void paintConnector(java.awt.Color fg,
                              java.awt.Color bg,
                              java.awt.Graphics g)

Use xor-mode on graphics to paint connector.

Parameters:

fg - Foreground color.

bg - Background color.

g - Graphics context.

paintPort

protected void paintPort(java.awt.Graphics g)

Use the preview flag to draw a highlighted port.

Parameters:

g - Graphics context.

createPopupMenu

public javax.swing.JPopupMenu createPopupMenu(java.awt.Point pt,
                                              java.lang.Object cell)

Creates a JPopupMenu containing context available actions.

Parameters:

pt - Point where to evaluate context.

cell - Cell on which to evaluate context.

Returns:

Created JPopupMenu.

getConnectingPorts

public org.jgraph.graph.Port[] getConnectingPorts()

Returns the two selected ports for connection

Returns:

Ports array.