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package org.eclipse.debug.internal.ui.actions;
/*
* (c) Copyright IBM Corp. 2001.
* All Rights Reserved.
*/
import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.action.IMenuCreator;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.swt.events.MenuListener;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Menu;
public class DebugHistoryMenuAction extends DebugDropDownAction implements IMenuCreator {
private MenuListener fMenuListener= null;
private Menu fTopMenu= null;
public DebugHistoryMenuAction() {
super(null);
}
/**
* @see IActionDelegate#selectionChanged(IAction, ISelection)
*/
public void selectionChanged(IAction action, ISelection selection) {
if (action instanceof Action) {
if (getActionProxy() == null) {
((Action)action).setMenuCreator(this);
setActionProxy(action);
}
} else {
action.setEnabled(false);
}
}
/**
* @see IActionDelegate#run(IAction)
*/
public void run(IAction action) {
//do nothing as the action strictly generates the history sub menu
}
/**
* @see IActionDelegateWithEvent#runWithEvent(IAction, Event)
*/
public void runWithEvent(IAction action, Event event) {
//do nothing as the action strictly generates the history sub menu
}
public Menu getMenu(Menu parent) {
cleanup();
Menu menu= new Menu(parent);
parent.addMenuListener(getDebugActionSetMenuListener());
fTopMenu= parent;
setCreatedMenu(menu);
Menu subMenu= createMenu(menu);
return subMenu;
}
/**
* @see LaunchDropDownAction#getDebugActionSetMenuListener()
*/
protected MenuListener getDebugActionSetMenuListener() {
if (fMenuListener == null) {
fMenuListener= super.getDebugActionSetMenuListener();
}
return fMenuListener;
}
public void dispose() {
cleanup();
super.dispose();
}
protected void cleanup() {
if (fTopMenu != null && !fTopMenu.isDisposed()) {
fTopMenu.removeMenuListener(getDebugActionSetMenuListener());
}
}
/**
* @see org.eclipse.debug.internal.ui.actions.LaunchDropDownAction#createTopSeparator(Menu)
*/
protected void createTopSeparator(Menu menu) {
}
}
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