Moved avoid animation tracking into a helper class.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@3854 542714f4-19e9-0310-aa3c-eee0fc999fb1
2006-02-14 22:17:52 +00:00
parent 9faa866dba
commit 28ac720b98
2 changed files with 75 additions and 21 deletions
@@ -0,0 +1,68 @@
+//
+// $Id$
+//
+// Narya library - tools for developing networked games
+// Copyright (C) 2002-2005 Three Rings Design, Inc., All Rights Reserved
+// http://www.threerings.net/code/narya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library 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
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.animation;
+
+import java.awt.Rectangle;
+
+import java.util.ArrayList;
+
+import com.samskivert.swing.util.SwingUtil;
+
+import com.threerings.media.Log;
+
+/**
+ * A utility class for positioning animations such that they don't overlap,
+ * as best as possible.
+ */
+public class AnimationArranger
+{
+    /**
+     * Position the specified animation so that it is not overlapping
+     * any still-running animations previously passed to this method.
+     */
+    public void positionAvoidAnimation (Animation anim, Rectangle viewBounds)
+    {
+        Rectangle abounds = new Rectangle(anim.getBounds());
+        ArrayList avoidables = (ArrayList) _avoidAnims.clone();
+        // if we are able to place it somewhere, do so
+        if (SwingUtil.positionRect(abounds, viewBounds, avoidables)) {
+            anim.setLocation(abounds.x, abounds.y);
+        }
+
+        // add the animation to the list of avoidables
+        _avoidAnims.add(anim);
+        // keep an eye on it so that we can remove it when it's finished
+        anim.addAnimationObserver(_avoidAnimObs);
+    }
+
+    /** The animations that other animations may wish to avoid. */
+    protected ArrayList _avoidAnims = new ArrayList();
+
+    /** Automatically removes avoid animations when they're done. */
+    protected AnimationAdapter _avoidAnimObs = new AnimationAdapter() {
+        public void animationCompleted (Animation anim, long when) {
+            if (!_avoidAnims.remove(anim)) {
+                Log.warning("Couldn't remove avoid animation?! " + anim + ".");
+            }
+        }
+    };
+}