/*
* 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.mmedia;
import javax.microedition.lcdui.*;
/**
* This is a helper interface to communicate between the LCDUI <code>Canvas
* </code> and
* the MMAPI video players. It has methods to register and unregister
* <code>MIDPVideoPainter</code>s with an LCDUI Canvas.
*/
public abstract class MMHelper {
static private MMHelper mmh = null;
/**
* This is the link to the LCDUI canvas implementation for special
* repaint events. This is called by javax.microedition.lcdui.MMHelperImpl.
*/
public static void setMMHelper(MMHelper mmhelper) {
// Safeguard to make sure its called only once
if (mmh == null)
mmh = mmhelper;
}
/**
* This method is called by MIDPVideoPainter implementation
* to get a hold of the MMHelper...
*/
static MMHelper getMMHelper() {
return mmh;
}
/**
* Registers a video control (which implements MIDPVideoPainter) with
* the corresponding Canvas where the video is to show up.
*/
public abstract void registerPlayer(Canvas c, MIDPVideoPainter vp);
/**
* Unregisters a video control so that it doesn't get paint callbacks
* anymore after the player is closed. This also reduces load on the
* Canvas repaint mechanism.
*/
public abstract void unregisterPlayer(Canvas c, MIDPVideoPainter vp);
/**
* Get Display being used for Item painting. Platform-dependent.
*/
public abstract Display getItemDisplay(Item item);
};
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