# HG changeset patch
# User Jaroslav Tulach <jaroslav.tulach@apidesign.org>
# Date 1283662369 -7200
# Node ID 8b62bffb1a8f50669551022b397b91c17d3177d7
# Parent  eb6053abdd000697c745f044fe1d1177144f2345
Verify whether the fence can be placed at given position

diff -r eb6053abdd00 -r 8b62bffb1a8f visidor/src/main/java/cz/xelfi/quoridor/visidor/Viewer.java
--- a/visidor/src/main/java/cz/xelfi/quoridor/visidor/Viewer.java	Sun Sep 05 06:43:06 2010 +0200
+++ b/visidor/src/main/java/cz/xelfi/quoridor/visidor/Viewer.java	Sun Sep 05 06:52:49 2010 +0200
@@ -118,7 +118,7 @@
             int column = (f.getColumn() - 'A') + 1;
             int row = 9 - f.getRow();
             Orientation orient = f.getOrientation();
-            drawFence(orient, column, row, g);
+            drawFence(orient, column, row, g, true);
         }
 
         int cnt = 0;
@@ -155,7 +155,7 @@
         }
     }
 
-    private void drawFence(Orientation orient, int column, int row, Graphics2D g) throws IllegalStateException {
+    private void drawFence(Orientation orient, int column, int row, Graphics2D g, boolean fill) throws IllegalStateException {
         int fifth = fieldSize / 10;
         int w, h;
         switch (orient) {
@@ -169,20 +169,17 @@
             2 * w,
             2 * h
         );
-        g.fill(r);
+        if (fill) {
+            g.fill(r);
+        } else {
+            g.draw(r);
+        }
     }
 
     public void mouseDragged(MouseEvent e) {
     }
 
     public void mouseMoved(MouseEvent e) {
-        BufferedImage img = new BufferedImage(getWidth(), getHeight(), BufferedImage.TYPE_INT_ARGB);
-        final Graphics2D d2 = img.createGraphics();
-        
-        d2.setBackground(getBackground());
-        d2.clearRect(0, 0, getWidth(), getHeight());
-        paintComponent(d2);
-        
         int x = Math.round(((float)(e.getX() - xdelta)) / fieldSize);
         int y = Math.round(((float)(e.getY() - ydelta)) / fieldSize);
         if (x <= 0 || x >= 9) {
@@ -212,7 +209,21 @@
                 lastOrientation = Orientation.VERTICAL;
             }
         }
-        drawFence(lastOrientation, x, y, d2);
+        
+        BufferedImage img = new BufferedImage(getWidth(), getHeight(), BufferedImage.TYPE_INT_ARGB);
+        final Graphics2D d2 = img.createGraphics();
+        d2.setBackground(getBackground());
+        d2.clearRect(0, 0, getWidth(), getHeight());
+        paintComponent(d2);
+        
+        try {
+            Board newBoard = board.apply(Move.fence((char)('A' + x - 1), 9 - y, lastOrientation));
+            drawFence(lastOrientation, x, y, d2, true);
+        } catch (IllegalPositionException ex) {
+            // can't place fence
+            drawFence(lastOrientation, x, y, d2, false);
+        }
+        
         
         getGraphics().drawImage(img, 0, 0, null);
     }