nativeforegroundstate.java

来自「This is a resource based on j2me embedde」· Java 代码 · 共 56 行

/*
 *
 *
 * Copyright  1990-2007 Sun Microsystems, Inc. All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
 * 
 * This program 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.
 * 
 * This program 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 at /legal/license.txt).
 * 
 * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa
 * Clara, CA 95054 or visit www.sun.com if you need additional
 * information or have any questions.
 */

package com.sun.midp.main;

import com.sun.midp.security.*;

/** This class enables the native foreground state to be changed. */
public class NativeForegroundState {
    /** This class only has static methods. */
    private NativeForegroundState() {}

    /**
     * Set foreground display native state, so the native code will know
     * which display can draw.
     *
     * @param token token with the "com.sun.midp.ams" permission allowed
     * @param displayId Display ID
     */
    public static void setState(SecurityToken token, int displayId) {
        token.checkIfPermissionAllowed(Permissions.AMS);
        setState(displayId);
    }

    /**
     * Set foreground display native state, so the native code will know
     * which display can draw.
     *
     * @param displayId Display ID
     */
    private static native void setState(int displayId);
}