/*******************************************************************************
* Copyright (c) 2000, 2011 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.internal.ui.wizards;
import org.eclipse.core.runtime.IRegistryChangeEvent;
import org.eclipse.core.runtime.IRegistryChangeListener;
import org.eclipse.core.runtime.Platform;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.ActionContributionItem;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.action.IMenuCreator;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.IWorkbenchWindowPulldownDelegate2;
public abstract class AbstractWizardDropDownAction extends Action implements IMenuCreator, IWorkbenchWindowPulldownDelegate2 {
protected final static IAction[] NO_ACTIONS = new IAction[0];
private Menu fMenu;
private IAction[] fActions;
private IRegistryChangeListener fListener;
private Object fLock = new Object();
public AbstractWizardDropDownAction() {
fMenu= null;
fActions= null;
setMenuCreator(this);
// listen for changes to wizard extensions
fListener = new IRegistryChangeListener() {
public void registryChanged(IRegistryChangeEvent event) {
refreshActions();
}
};
Platform.getExtensionRegistry().addRegistryChangeListener(fListener);
}
public void refreshActions() {
// force menu and actions to be created again
Menu oldMenu = null;
synchronized(fLock) {
oldMenu = fMenu;
fActions = null;
fMenu = null;
}
if (oldMenu != null)
oldMenu.dispose();
}
public void dispose() {
if (fListener != null) {
Platform.getExtensionRegistry().removeRegistryChangeListener(fListener);
fListener= null;
}
refreshActions();
}
public Menu getMenu(Menu parent) {
return null;
}
public Menu getMenu(Control parent) {
synchronized(fLock) {
fMenu= new Menu(parent);
IAction[] actions= getActions();
for (int i= 0; i < actions.length; i++) {
ActionContributionItem item= new ActionContributionItem(actions[i]);
item.fill(fMenu, -1);
}
return fMenu;
}
}
@Override
public void run() {
// for now, run the default action
// we might want the last run action at some point
IAction action = getDefaultAction();
if (action != null) {
action.run();
}
}
public IAction getDefaultAction() {
IAction[] actions = getActions();
if (actions.length > 0) {
actions[0].getId();
return actions[0];
// for (int i = 0; i < actions.length; ++i) {
// IAction action = actions[i];
// if (action.isEnabled()) {
// return action;
// }
// }
}
return null;
}
private IAction[] getActions() {
synchronized(fLock) {
fActions = getWizardActions();
if (fActions == null)
fActions = NO_ACTIONS;
//TODO provide a way to sort the actions
return fActions;
}
}
protected abstract IAction[] getWizardActions();
/* (non-Javadoc)
* @see org.eclipse.ui.IWorkbenchWindowActionDelegate#init(org.eclipse.ui.IWorkbenchWindow)
*/
public void init(IWorkbenchWindow window) {
}
/* (non-Javadoc)
* @see org.eclipse.ui.IActionDelegate#run(org.eclipse.jface.action.IAction)
*/
public void run(IAction action) {
run();
}
/* (non-Javadoc)
* @see org.eclipse.ui.IActionDelegate#selectionChanged(org.eclipse.jface.action.IAction, org.eclipse.jface.viewers.ISelection)
*/
public void selectionChanged(IAction action, ISelection selection) {
}
}