org.jboss.tools.vpe.editor.toolbar.VpeDropDownMenu.java Source code

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Here is the source code for org.jboss.tools.vpe.editor.toolbar.VpeDropDownMenu.java

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/******************************************************************************* 
 * Copyright (c) 2007 Red Hat, Inc.
 * Distributed under license by Red Hat, Inc. All rights reserved.
 * This program is 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:
 *     Red Hat, Inc. - initial API and implementation
 ******************************************************************************/
package org.jboss.tools.vpe.editor.toolbar;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.ToolBar;
import org.eclipse.swt.widgets.ToolItem;
import org.jboss.tools.common.util.SwtUtil;
import org.jboss.tools.vpe.editor.mozilla.MozillaEditor;

/**
 * @author Sergey Dzmitrovich
 * 
 */
public class VpeDropDownMenu {

    private Menu dropDownMenu;

    public VpeDropDownMenu(ToolBar bar, String toolTipText) {
        ToolItem item = new ToolItem(bar, SWT.MENU);
        item.setToolTipText(toolTipText);
        final Image arrowImage = ImageDescriptor.createFromFile(MozillaEditor.class, "icons/arrow.gif") //$NON-NLS-1$
                .createImage();
        item.setImage(arrowImage);
        SwtUtil.bindDisposal(arrowImage, item);

        item.addSelectionListener(new SelectionAdapter() {
            public void widgetSelected(SelectionEvent event) {
                ToolItem item = (ToolItem) event.widget;
                Rectangle rect = item.getBounds();
                Point pt = item.getParent().toDisplay(new Point(rect.x, rect.y));
                dropDownMenu.setLocation(pt.x, pt.y + rect.height);
                dropDownMenu.setVisible(true);
            }
        });

        item.addDisposeListener(new DisposeListener() {

            public void widgetDisposed(DisposeEvent e) {
                ((ToolItem) e.widget).getImage().dispose();
            }

        });

        this.dropDownMenu = new Menu(item.getParent().getShell());

    }

    public Menu getDropDownMenu() {
        return dropDownMenu;
    }

    public void dispose() {
        if (dropDownMenu != null) {
            dropDownMenu.dispose();
            dropDownMenu = null;
        }
    }
}