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
43 private int frameCount;
44 private int activeFrameCount = 0;
45 private Thread thread;
49 public AnimateEventArgs(Image img)
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))
55 this.frameCount = img.GetFrameCount (FrameDimension.Time);
59 public int FrameCount {
65 public int ActiveFrameCount {
67 return activeFrameCount;
71 activeFrameCount = value;
75 public Thread RunThread{
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);
111 PropertyItem item = img.GetPropertyItem (0x5100); // FrameDelay in libgdiplus
112 // Time is in 1/100th of a second
113 delay = (item.Value [0] + item.Value [1] * 256) * 10;
118 WorkerThread WT = new WorkerThread (onFrameChangeHandler, evtArgs, delay);
119 ThreadStart TS = new ThreadStart(WT.LoopHandler);
120 Thread thread = new Thread(TS);
121 thread.IsBackground = true;
122 evtArgs.RunThread = thread;
123 ht.Add (img, evtArgs);
129 public static bool CanAnimate (Image img)
131 //An image can animate if it has multiple frame in
132 //time based FrameDimension else return false
133 //Doubt what if the image has multiple frame in page
134 //based FrameDimension
138 //Need to check whether i can do this without iterating
139 //within the FrameDimensionsList, ie just call GetFrameCount
140 //with parameter FrameDimension.Time
141 Guid[] dimensionList = img.FrameDimensionsList;
142 int length = dimensionList.Length;
144 for (int i=0; i<length; i++)
146 if (dimensionList [i].Equals(FrameDimension.Time.Guid))
148 frameCount = img.GetFrameCount (FrameDimension.Time);
157 public static void StopAnimate (Image img, EventHandler onFrameChangeHandler)
160 throw new System.NullReferenceException ("Object reference not set to an instance of an object.");
162 if (ht.ContainsKey (img)) {
163 AnimateEventArgs evtArgs = (AnimateEventArgs) ht [img];
164 evtArgs.RunThread.Abort ();
169 public static void UpdateFrames ()
171 foreach (Image img in ht.Keys) {
176 public static void UpdateFrames (Image img)
179 throw new System.NullReferenceException ("Object reference not set to an instance of an object.");
181 if (ht.ContainsKey (img)){
182 //Need a way to get the delay during animation
183 AnimateEventArgs evtArgs = (AnimateEventArgs) ht [img];
184 if (evtArgs.ActiveFrameCount < evtArgs.FrameCount-1){
185 evtArgs.ActiveFrameCount ++;
186 img.SelectActiveFrame (FrameDimension.Time, evtArgs.ActiveFrameCount);
189 evtArgs.ActiveFrameCount = 0;
197 EventHandler frameChangeHandler;
198 AnimateEventArgs animateEventArgs;
201 public WorkerThread (EventHandler frmChgHandler, AnimateEventArgs aniEvtArgs, int delay)
203 frameChangeHandler = frmChgHandler;
204 animateEventArgs = aniEvtArgs;
208 public void LoopHandler()
212 Thread.Sleep (delay);
213 frameChangeHandler (null, animateEventArgs);
215 } catch (ThreadAbortException) {
216 Thread.ResetAbort (); // we're going to finish anyway
217 } catch (Exception er) {