2 // System.Drawing.ImageAnimator.cs
5 // Dennis Hayes (dennish@Raytek.com)
6 // Sanjay Gupta (gsanjay@novell.com)
8 // (C) 2002 Ximian, Inc
12 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
14 // Permission is hereby granted, free of charge, to any person obtaining
15 // a copy of this software and associated documentation files (the
16 // "Software"), to deal in the Software without restriction, including
17 // without limitation the rights to use, copy, modify, merge, publish,
18 // distribute, sublicense, and/or sell copies of the Software, and to
19 // permit persons to whom the Software is furnished to do so, subject to
20 // the following conditions:
22 // The above copyright notice and this permission notice shall be
23 // included in all copies or substantial portions of the Software.
25 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
29 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
30 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
31 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
34 using System.Drawing.Imaging;
35 using System.Threading;
36 using System.Collections;
38 namespace System.Drawing
40 //AnimateEventArgs class
41 class AnimateEventArgs : EventArgs
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43 private int frameCount;
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44 private int activeFrameCount = 0;
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45 private Thread thread;
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49 public AnimateEventArgs(Image img)
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51 Guid[] dimensionList = img.FrameDimensionsList;
52 int length = dimensionList.Length;
53 for (int i=0; i<length; i++) {
54 if (dimensionList [i].Equals(FrameDimension.Time.Guid))
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55 this.frameCount = img.GetFrameCount (FrameDimension.Time);
59 public int FrameCount {
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65 public int ActiveFrameCount {
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67 return activeFrameCount;
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71 activeFrameCount = value;
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75 public Thread RunThread{
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87 /// Summary description for ImageAnimator.
91 public sealed class ImageAnimator
93 static Hashtable ht = new Hashtable ();
95 private ImageAnimator ()
98 // TODO: Add constructor logic here
102 public static void Animate (Image img, EventHandler onFrameChangeHandler)
105 throw new System.NullReferenceException ("Object reference not set to an instance of an object.");
107 if (!ht.ContainsKey (img)) {
108 AnimateEventArgs evtArgs = new AnimateEventArgs (img);
109 WorkerThread WT = new WorkerThread(onFrameChangeHandler, evtArgs);
110 ThreadStart TS = new ThreadStart(WT.LoopHandler);
111 Thread thread = new Thread(TS);
112 thread.IsBackground = true;
113 evtArgs.RunThread = thread;
114 ht.Add (img, evtArgs);
120 public static bool CanAnimate (Image img)
122 //An image can animate if it has multiple frame in
123 //time based FrameDimension else return false
124 //Doubt what if the image has multiple frame in page
125 //based FrameDimension
129 //Need to check whether i can do this without iterating
130 //within the FrameDimensionsList, ie just call GetFrameCount
131 //with parameter FrameDimension.Time
132 Guid[] dimensionList = img.FrameDimensionsList;
133 int length = dimensionList.Length;
135 for (int i=0; i<length; i++)
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137 if (dimensionList [i].Equals(FrameDimension.Time.Guid))
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139 frameCount = img.GetFrameCount (FrameDimension.Time);
148 public static void StopAnimate (Image img, EventHandler onFrameChangeHandler)
151 throw new System.NullReferenceException ("Object reference not set to an instance of an object.");
153 if (ht.ContainsKey (img)) {
154 AnimateEventArgs evtArgs = (AnimateEventArgs) ht [img];
155 evtArgs.RunThread.Abort ();
160 public static void UpdateFrames ()
162 foreach (Image img in ht.Keys) {
167 public static void UpdateFrames (Image img)
170 throw new System.NullReferenceException ("Object reference not set to an instance of an object.");
172 if (ht.ContainsKey (img)){
173 //Need a way to get the delay during animation
174 AnimateEventArgs evtArgs = (AnimateEventArgs) ht [img];
175 if (evtArgs.ActiveFrameCount < evtArgs.FrameCount-1){
176 evtArgs.ActiveFrameCount ++;
177 img.SelectActiveFrame (FrameDimension.Time, evtArgs.ActiveFrameCount);
180 evtArgs.ActiveFrameCount = 0;
188 private EventHandler frameChangeHandler;
189 private AnimateEventArgs animateEventArgs;
191 public WorkerThread(EventHandler frmChgHandler, AnimateEventArgs aniEvtArgs)
193 frameChangeHandler = frmChgHandler;
194 animateEventArgs = aniEvtArgs;
197 public void LoopHandler()
202 //Need a way to get the delay during animation
204 frameChangeHandler (null, animateEventArgs);
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207 catch(ThreadAbortException)
209 //lets not bother ourselves with tae
210 //it will be thrown anyway