/*******************************************************************************
 * Copyright (c) 2000, 2004 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.ui.examples.readmetool;

import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.IWorkbenchWindowActionDelegate;

/**
 * This class shows how <code>IActionDelegate</code> implementations
 * should be used for global action registration for menu 
 * and tool bars. Action proxy object is created in the 
 * workbench based on presentation information in the plugin.xml
 * file. Delegate is not loaded until the first time the user
 * presses the button or selects the menu. Based on the action
 * availability, it is possible that the button will disable
 * instead of executing.
 */
public class WindowActionDelegate implements IWorkbenchWindowActionDelegate {
    private IWorkbenchWindow window;

    private ISelection selection;

    /* (non-Javadoc)
     * Method declared on IWorkbenchActionDelegate
     */
    public void dispose() {
        // do nothing
    }

    /* (non-Javadoc)
     * Method declared on IWorkbenchActionDelegate
     */
    public void init(IWorkbenchWindow window) {
        this.window = window;
    }

    /** 
     * The <code>WindowActionDelegate</code> implementation of this
     * <code>IActionDelegate</code> method 
     * launches a stand-alone dialog that contains a list of sections for
     * the selected readme file in the navigator.
     */
    public void run(IAction action) {
        SectionsDialog dialog = new SectionsDialog(window.getShell(),
                ReadmeModelFactory.getInstance().getSections(selection));
        dialog.open();
    }

    /** 
     * The <code>WindowActionDelegate</code> implementation of this
     * <code>IActionDelegate</code> method 
     * does nothing - we will let simple rules in the XML
     * config file react to selections.
     */
    public void selectionChanged(IAction action, ISelection selection) {
        this.selection = selection;
    }
}