Java example source code file (XMenuPeer.java)

This example Java source code file (XMenuPeer.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

attempt, awt, platformlogger, string, util, vector, xmenuitempeer, xmenupeer, xmenuwindow, xmenuwindowpeer

The XMenuPeer.java Java example source code

/*
 * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package sun.awt.X11;

import java.awt.*;
import java.awt.peer.*;

import java.util.Vector;
import sun.util.logging.PlatformLogger;
import sun.awt.AWTAccessor;

public class XMenuPeer extends XMenuItemPeer implements MenuPeer {

    /************************************************
     *
     * Data members
     *
     ************************************************/
    private static PlatformLogger log = PlatformLogger.getLogger("sun.awt.X11.XMenuPeer");

    /**
     * Window that correspond to this menu
     */
    XMenuWindow menuWindow;

    /************************************************
     *
     * Construction
     *
     ************************************************/
    XMenuPeer(Menu target) {
        super(target);
    }

    /**
     * This function is called when menu is bound
     * to its container window. Creates submenu window
     * that fills its items vector while construction
     */
    void setContainer(XBaseMenuWindow container) {
        super.setContainer(container);
        menuWindow = new XMenuWindow(this);
    }


    /************************************************
     *
     * Implementaion of interface methods
     *
     ************************************************/

    /*
     * From MenuComponentPeer
     */

    /**
     * Disposes menu window if needed
     */
    public void dispose() {
        if (menuWindow != null) {
            menuWindow.dispose();
        }
        super.dispose();
    }

    /**
     * Resets text metrics for this item, for its menu window
     * and for all descendant menu windows
     */
    public void setFont(Font font) {
        //TODO:We can decrease count of repaints here
        //and get rid of recursion
        resetTextMetrics();

        XMenuWindow menuWindow = getMenuWindow();
        if (menuWindow != null) {
            menuWindow.setItemsFont(font);
        }

        repaintIfShowing();
    }

    /*
     * From MenuPeer
     */
    /**
     * addSeparator routines are not used
     * in peers. Shared code invokes addItem("-")
     * for adding separators
     */
    public void addSeparator() {
        if (log.isLoggable(PlatformLogger.Level.FINER)) {
            log.finer("addSeparator is not implemented");
        }
    }

    public void addItem(MenuItem item) {
        XMenuWindow menuWindow = getMenuWindow();
        if (menuWindow != null) {
            menuWindow.addItem(item);
        } else {
            if (log.isLoggable(PlatformLogger.Level.FINE)) {
                log.fine("Attempt to use XMenuWindowPeer without window");
            }
        }
    }

    public void delItem(int index) {
        XMenuWindow menuWindow = getMenuWindow();
        if (menuWindow != null) {
            menuWindow.delItem(index);
        } else {
            if (log.isLoggable(PlatformLogger.Level.FINE)) {
                log.fine("Attempt to use XMenuWindowPeer without window");
            }
        }
    }

    /************************************************
     *
     * Access to target's fields
     *
     ************************************************/
    Vector getTargetItems() {
        return AWTAccessor.getMenuAccessor().getItems((Menu)getTarget());
    }

    /************************************************
     *
     * Overriden behaviour
     *
     ************************************************/
    boolean isSeparator() {
        return false;
    }

    //Fix for 6180416: Shortcut keys are displayed against Menus on XToolkit
    //Menu should always return null as shortcutText
    String getShortcutText() {
        return null;
    }

    /************************************************
     *
     * Utility functions
     *
     ************************************************/

    /**
     * Returns menu window of this menu or null
     * it this menu has no container and so its
     * window can't be created.
     */
    XMenuWindow getMenuWindow() {
        return menuWindow;
    }

}