Make sure screen coordinates that are converted to tile and full

coordinates when editing a scene are valid before forging ahead with
scene modifications.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@436 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/miso/client/IsoSceneView.java

@@ -1,5 +1,5 @@
 //
-// $Id: IsoSceneView.java,v 1.57 2001/10/11 00:41:27 shaper Exp $
+// $Id: IsoSceneView.java,v 1.58 2001/10/11 16:21:08 shaper Exp $
 
 package com.threerings.miso.scene;
 
@@ -64,12 +64,7 @@ public class IsoSceneView implements SceneView
         _scene = scene;
     }
 
-    /**
+    // documentation inherited
-     * Paint the scene view and any highlighted tiles to the given
-     * graphics context.
-     *
-     * @param g the graphics context.
-     */
     public void paint (Graphics g)
     {
 	if (_scene == null) {
@@ -375,11 +370,7 @@ public class IsoSceneView implements SceneView
 	}
     }
 
-    /**
+    // documentation inherited
-     * Invalidate a list of rectangles in the view for later repainting.
-     *
-     * @param rects the list of Rectangle objects.
-     */
     public void invalidateRects (DirtyRectList rects)
     {
         // we specifically need to allow the dirty rects list to grow
@@ -530,6 +521,7 @@ public class IsoSceneView implements SceneView
         _model.precalculate();
     }
 
+    // documentation inherited
     public Path getPath (AmbulatorySprite sprite, int x, int y)
     {
         // make sure the destination point is within our bounds

src/java/com/threerings/miso/client/IsoSceneViewModel.java

@@ -1,5 +1,5 @@
 //
-// $Id: IsoSceneViewModel.java,v 1.12 2001/08/29 20:07:54 shaper Exp $
+// $Id: IsoSceneViewModel.java,v 1.13 2001/10/11 16:21:09 shaper Exp $
 
 package com.threerings.miso.scene;
 
@@ -8,6 +8,7 @@ import java.awt.Point;
 
 import com.samskivert.util.Config;
 import com.threerings.miso.Log;
+import com.threerings.miso.scene.util.IsoUtil;
 import com.threerings.miso.util.MisoUtil;
 
 /**
@@ -107,6 +108,29 @@ public class IsoSceneViewModel
 	showPaths = config.getValue(SHOW_PATHS_KEY, DEF_SHOW_PATHS);
     }
 
+    /**
+     * Returns whether the given tile coordinate is a valid coordinate
+     * within the scene.
+     */
+    public boolean isValidCoordinate (int x, int y)
+    {
+        return (x >= 0 && x < scenewid &&
+                y >= 0 && y < scenehei);
+    }
+
+    /**
+     * Returns whether the given full coordinate is a valid coordinate
+     * within the scene.
+     */
+    public boolean isValidFullCoordinate (int x, int y)
+    {
+        int tx = IsoUtil.fullToTile(x), ty = IsoUtil.fullToTile(y);
+        int fx = IsoUtil.fullToFine(x), fy = IsoUtil.fullToFine(y);
+        return (isValidCoordinate(tx, ty) &&
+                fx >= 0 && fx < finegran &&
+                fy >= 0 && fy < finegran);
+    }
+
     /**
      * Return whether locations in the scene are currently drawn.
      */