org.eclipse.draw2d
Class FocusTraverseManager

java.lang.Object
  |
  +--org.eclipse.draw2d.FocusTraverseManager

public class FocusTraverseManager

extends Object

This class is a helper to the SWTEventDispatcher. It handles the task of determining which Figure will gain focus upon a tab/shift-tab. It also keeps track of the Figure with current focus. Note: When a Canvas with a LightweightSystem gains focus, it gives focus to the child Figure who had focus when this Canvas lost focus. If the canvas is gaining focus for the first time, focus is given to its first child Figure.

Constructor Summary

FocusTraverseManager()

Method Summary

IFigure	getCurrentFocusOwner()
IFigure	getNextFocusableFigure(IFigure root, IFigure focusOwner) Returns the IFigure that will receive focus upon a 'tab' traverse event.
IFigure	getPreviousFocusableFigure(IFigure root, IFigure focusOwner) Returns the IFigure that will receive focus upon a 'shift-tab' traverse event.
void	setCurrentFocusOwner(IFigure fig)

Methods inherited from class java.lang.Object

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

Constructor Detail

FocusTraverseManager

public FocusTraverseManager()

Method Detail

getNextFocusableFigure

public IFigure getNextFocusableFigure(IFigure root,
                                      IFigure focusOwner)

Returns the IFigure that will receive focus upon a 'tab' traverse event.

Parameters:

root - The LightweightSystem's root figure

focusOwner - The IFigure who currently owns focus

getPreviousFocusableFigure

public IFigure getPreviousFocusableFigure(IFigure root,
                                          IFigure focusOwner)

Returns the IFigure that will receive focus upon a 'shift-tab' traverse event.

Parameters:

root - The LightweightSystem's root figure

focusOwner - The IFigure who currently owns focus

getCurrentFocusOwner

public IFigure getCurrentFocusOwner()

setCurrentFocusOwner

public void setCurrentFocusOwner(IFigure fig)