00001 /* 00002 * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc. All rights reserved. 00003 * 00004 * Redistribution and use in source and binary forms, with or without 00005 * modification, are permitted provided that the following conditions 00006 * are met: 00007 * 1. Redistributions of source code must retain the above copyright 00008 * notice, this list of conditions and the following disclaimer. 00009 * 2. Redistributions in binary form must reproduce the above copyright 00010 * notice, this list of conditions and the following disclaimer in the 00011 * documentation and/or other materials provided with the distribution. 00012 * 00013 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 00014 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00015 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 00016 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 00017 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 00018 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 00019 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 00020 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 00021 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 00022 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 00023 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00024 */ 00025 00026 #ifndef ImageObserver_h 00027 #define ImageObserver_h 00028 00029 namespace WebCore { 00030 00031 #ifdef __OWB__ 00032 // from ImageSource.h 00033 const int cAnimationLoopOnce = -1; 00034 const int cAnimationNone = -2; 00035 #endif 00036 00037 class Image; 00038 00039 // Interface for notification about changes to an image, including decoding, 00040 // drawing, and animating. 00041 class ImageObserver { 00042 protected: 00043 virtual ~ImageObserver() {} 00044 public: 00045 virtual void decodedSizeChanged(const Image*, int delta) = 0; 00046 virtual void didDraw(const Image*) = 0; 00047 00048 virtual bool shouldPauseAnimation(const Image*) = 0; 00049 virtual void animationAdvanced(const Image*) = 0; 00050 }; 00051 00052 } 00053 00054 #endif