Factored FadeAnimation into something that can be extended to fade

different things in. Created FadeImage and FadeLabel derivations.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@3425 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/media/animation/FadeImageAnimation.java

@@ -0,0 +1,52 @@
+//
+// $Id$
+//
+// 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.Graphics2D;
+import java.awt.Rectangle;
+
+import com.threerings.media.image.Mirage;
+
+/**
+ * Fades an image in or out by varying the alpha level during rendering.
+ */
+public class FadeImageAnimation extends FadeAnimation
+{
+    /**
+     * Creates an image fading animation.
+     */
+    public FadeImageAnimation (Mirage image, int x, int y,
+                               float alpha, float step, float target)
+    {
+        super(new Rectangle(x, y, image.getWidth(), image.getHeight()),
+              alpha, step, target);
+        _image = image;
+    }
+
+    // documentation inherited
+    protected void paintAnimation (Graphics2D gfx)
+    {
+        _image.paint(gfx, _bounds.x, _bounds.y);
+    }
+
+    protected Mirage _image;
+}