Created a polygon extension that can return its bounds without creating a

freaking Rectangle object each time. git-svn-id: https://samskivert.googlecode.com/svn/trunk@585 6335cc39-0255-0410-8fd6-9bcaacd3b74c
2002-02-19 03:41:41 +00:00
parent defce23751
commit 8969525a40
1 changed files with 41 additions and 0 deletions
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+//
+// $Id: SmartPolygon.java,v 1.1 2002/02/19 03:41:41 mdb Exp $
+//
+// samskivert library - useful routines for java programs
+// Copyright (C) 2001 Michael Bayne
+// 
+// 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.samskivert.swing;
+
+import java.awt.Polygon;
+import java.awt.Rectangle;
+
+/**
+ * Extends the AWT polygon class and provides a {@link #getBounds} method
+ * that doesn't annoyingly make a copy of the bounds rectangle every time
+ * it is returned.
+ */
+public class SmartPolygon extends Polygon
+{
+    /**
+     * Returns the internally cached bounds rectangle for this polygon.
+     * <em>Don't modify it!</em>
+     */
+    public Rectangle getBounds ()
+    {
+        return (bounds == null) ? super.getBounds() : bounds;
+    }
+}