CloseAllAction.java

/*******************************************************************************
 * Copyright (c) 1998, 2015 Oracle and/or its affiliates. All rights reserved.
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
 * which accompanies this distribution.
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 *     Oracle - initial API and implementation from Oracle TopLink
******************************************************************************/
package org.eclipse.persistence.tools.workbench.framework.internal;

import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;

import org.eclipse.persistence.tools.workbench.framework.action.AbstractFrameworkAction;
import org.eclipse.persistence.tools.workbench.framework.context.WorkbenchContext;
import org.eclipse.persistence.tools.workbench.utility.events.CollectionChangeEvent;
import org.eclipse.persistence.tools.workbench.utility.events.CollectionChangeListener;


/**
 * close all the nodes;
 * enabled whenever there are ANY nodes open
 */
final class CloseAllAction
    extends AbstractFrameworkAction
{
    /** we need access to the node manager's internal api */
    private FrameworkNodeManager nodeManager;

    /** listen to the collection of all the open project nodes */
    private CollectionChangeListener projectNodesListener;

    /** hold the listener so we can remove it */
    private WindowListener windowListener;

    CloseAllAction(WorkbenchContext context, FrameworkNodeManager nodeManager) {
        super(context);
        this.initialize(nodeManager);
    }

    protected void initialize() {
        super.initialize();
        this.initializeTextAndMnemonic("file.closeAll");
        this.initializeIcon("file.closeAll");
        this.initializeAccelerator("file.closeAll.ACCELERATOR");
        this.initializeToolTipText("file.closeAll.toolTipText");
    }

    private void initialize(FrameworkNodeManager frameworkNodeManager) {
        this.nodeManager = frameworkNodeManager;
        this.projectNodesListener = this.buildProjectNodesListener();
        frameworkNodeManager.addCollectionChangeListener(FrameworkNodeManager.PROJECT_NODES_COLLECTION, this.projectNodesListener);
        this.windowListener = this.buildWorkbenchWindowListener();
        this.currentWindow().addWindowListener(this.windowListener);
        this.updateEnabledState();
    }

    private CollectionChangeListener buildProjectNodesListener() {
        return new CollectionChangeListener() {
            public void itemsAdded(CollectionChangeEvent e) {
                CloseAllAction.this.projectNodesChanged();
            }
            public void itemsRemoved(CollectionChangeEvent e) {
                CloseAllAction.this.projectNodesChanged();
            }
            public void collectionChanged(CollectionChangeEvent e) {
                CloseAllAction.this.projectNodesChanged();
            }
        };
    }

    private WindowListener buildWorkbenchWindowListener() {
        return new WindowAdapter() {
            public void windowClosed(WindowEvent e) {
                CloseAllAction.this.workbenchWindowClosed();
            }
        };
    }

    void projectNodesChanged() {
        this.updateEnabledState();
    }

    private void updateEnabledState() {
        this.setEnabled(this.nodeManager.projectNodesSize() > 0);
    }

    protected void execute() {
        this.nodeManager.closeAll(this.getWorkbenchContext());
    }

    void workbenchWindowClosed() {
        this.nodeManager.removeCollectionChangeListener(FrameworkNodeManager.PROJECT_NODES_COLLECTION, this.projectNodesListener);
        // stop listening to the window, or, for some odd reason,
        // we will receive the WINDOW_CLOSED event twice...
        this.currentWindow().removeWindowListener(this.windowListener);
    }

}