WorkbenchCloseAction.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 javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;

import org.eclipse.persistence.tools.workbench.framework.action.AbstractFrameworkAction;
import org.eclipse.persistence.tools.workbench.framework.context.WorkbenchContext;


/**
 * close the selected nodes;
 * enabled when nodes are selected;
 * this action is part of the FileMenu and MainToolBar, while SaveAction is
 * part of the SelectionMenu
 */
final class WorkbenchCloseAction
    extends AbstractFrameworkAction
{
    /** we need access to the node manager's internal api */
    private FrameworkNodeManager nodeManager;
    private TreeSelectionListener treeSelectionListener;
    private WindowListener windowListener;


    WorkbenchCloseAction(WorkbenchContext context, FrameworkNodeManager nodeManager) {
        super(context);
        this.nodeManager = nodeManager;
    }

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

        this.treeSelectionListener = buildTreeSelectionListener();
        this.windowListener = buildWorkbenchWindowListener();

        this.currentWindow().addWindowListener(this.windowListener);
        this.navigatorSelectionModel().addTreeSelectionListener(this.treeSelectionListener);

        this.updateEnabledState();
    }

    private TreeSelectionListener buildTreeSelectionListener() {
        return new TreeSelectionListener() {
            public void valueChanged(TreeSelectionEvent e) {
                synchronized (WorkbenchCloseAction.this) {
                    WorkbenchCloseAction.this.update();
                }
            }
        };
    }

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

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

    private void updateEnabledState() {
        this.setEnabled(this.selectedProjectNodes().length > 0);
    }

    protected void execute() {
        this.nodeManager.close(this.selectedProjectNodes(), this.getWorkbenchContext());
    }

    void workbenchWindowClosed() {
        this.navigatorSelectionModel().removeTreeSelectionListener(this.treeSelectionListener);
        // stop listening to the window, or, for some odd reason,
        // we will receive the WINDOW_CLOSED event twice...
        this.currentWindow().removeWindowListener(this.windowListener);
    }

}