001: /*
002: *
003: *
004: * Copyright 1990-2007 Sun Microsystems, Inc. All Rights Reserved.
005: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
006: *
007: * This program is free software; you can redistribute it and/or
008: * modify it under the terms of the GNU General Public License version
009: * 2 only, as published by the Free Software Foundation.
010: *
011: * This program is distributed in the hope that it will be useful, but
012: * WITHOUT ANY WARRANTY; without even the implied warranty of
013: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014: * General Public License version 2 for more details (a copy is
015: * included at /legal/license.txt).
016: *
017: * You should have received a copy of the GNU General Public License
018: * version 2 along with this work; if not, write to the Free Software
019: * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
020: * 02110-1301 USA
021: *
022: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
023: * Clara, CA 95054 or visit www.sun.com if you need additional
024: * information or have any questions.
025: */
026: package com.sun.midp.main;
027:
028: /**
029: * This class override the MVM display manager so that requests from its
030: * parent midlet will not be given to the MVM display manager.
031: */
032: public class NativeDisplayControllerPeer extends MVMDisplayController {
033: /**
034: * Construct a DisplayController with a reference to the ProxyList.
035: *
036: * @param theMIDletProxyList reference to the MIDlet proxy list
037: */
038: public NativeDisplayControllerPeer(
039: MIDletProxyList theMIDletProxyList) {
040: // The Java foreground selector is not used by this controller.
041: super (theMIDletProxyList, null);
042: }
043:
044: /**
045: * Call to notify that foreground MIDlet is changing and give the
046: * display controller a chance to preempt the change.
047: * Also the last MIDlet created state will be reset.
048: * <p>
049: * If the MIDlet to get the foreground is paused, then activate it.
050: *
051: * @param midlet proxy of the MIDlet to be put in the foreground
052: *
053: * @return Proxy of the next foreground MIDlet, may be the foreground
054: * MIDlet if the foreground should not change
055: */
056: MIDletProxy foregroundMidletChanging(MIDletProxy midlet) {
057: MIDletProxy nextForeground = super
058: .foregroundMidletChanging(midlet);
059:
060: if (nextForeground != null) {
061: notifyMidletHasForeground(nextForeground.getExternalAppId());
062: }
063:
064: return nextForeground;
065: }
066:
067: /**
068: * Handles MIDlet background requests.
069: * <p>
070: * If the MIDlet is the foreground MIDlet, then forward the request
071: * to the native layer to the system can show the native foreground
072: * selector to the user.
073: *
074: * @param midlet The proxy of the MIDlet that was updated
075: *
076: * @return foreground MIDlet so the foreground will not change at this
077: * time
078: */
079: MIDletProxy backgroundRequest(MIDletProxy midlet) {
080: MIDletProxy foreground = midletProxyList.getForegroundMIDlet();
081:
082: if (midlet == foreground) {
083: /*
084: * Normal MVM mode case,
085: * Let the user choose the next foreground using the native GUI.
086: */
087: forwardBackgroundRequest(midlet.getExternalAppId());
088: }
089:
090: // don't change the foreground
091: return foreground;
092: }
093:
094: /**
095: * Notify the native application manager of the MIDlet foreground change.
096: *
097: * @param externalAppId ID assigned by the external application manager
098: */
099: static native void notifyMidletHasForeground(int externalAppId);
100:
101: /**
102: * Forwards MIDlet background requests to the native layer.
103: *
104: * @param externalAppId ID assigned by the external application manager
105: */
106: private static native void forwardBackgroundRequest(
107: int externalAppId);
108: }
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