Added support for pausing a media panel which pauses all sprites and

animations currently operating therein. (It doesn't pause scrolling which
I suppose I'll have to fix at some point if we ever need it.)


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@1292 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/media/sprite/Sprite.java

@@ -1,5 +1,5 @@
 //
-// $Id: Sprite.java,v 1.42 2002/04/23 01:16:28 mdb Exp $
+// $Id: Sprite.java,v 1.43 2002/04/25 16:23:30 mdb Exp $
 
 package com.threerings.media.sprite;
 
@@ -336,6 +336,20 @@ public abstract class Sprite
         }
     }
 
+    /**
+     * This is called if the sprite manager is paused for some length of
+     * time and then unpaused. Sprites should adjust any time stamps they
+     * are maintaining internally by the delta so that time maintains the
+     * illusion of flowing smoothly forward.
+     */
+    public void fastForward (long timeDelta)
+    {
+        // fast forward any path we're following
+        if (_path != null) {
+            _path.fastForward(timeDelta);
+        }
+    }
+
     /**
      * Updates the sprite's render offset which is used to determine
      * where to place the top-left corner of the render bounds.

src/java/com/threerings/media/sprite/SpriteManager.java

@@ -1,5 +1,5 @@
 //
-// $Id: SpriteManager.java,v 1.29 2002/04/23 01:16:28 mdb Exp $
+// $Id: SpriteManager.java,v 1.30 2002/04/25 16:23:31 mdb Exp $
 
 package com.threerings.media.sprite;
 
@@ -209,6 +209,22 @@ public class SpriteManager
 	handleSpriteEvents();
     }
 
+    /**
+     * If the sprite manager is paused for some length of time, it should
+     * be fast forwarded by the appropriate number of milliseconds.  This
+     * allows sprites to smoothly pick up where they left off rather than
+     * abruptly jumping into the future, thinking that some outrageous
+     * amount of time passed since their last tick.
+     */
+    public void fastForward (long timeDelta)
+    {
+        int size = _sprites.size();
+	for (int ii = 0; ii < size; ii++) {
+            Sprite sprite = (Sprite)_sprites.get(ii);
+	    sprite.fastForward(timeDelta);
+        }
+    }
+
     /**
      * Call {@link Sprite#tick} on all sprite objects to give them a
      * chance to move themselves about, change their display image,