Make update code on playing a stone much more efficient

widgets/gogame.py

@@ -108,11 +108,14 @@ class GoGame(gtk.HBox):
         row = int(y / inc)
         col = int(x / inc)
 
-        self.goban.play_move((row,col))
-        self.update()
+        changed = self.goban.play_move((row,col))
+        print changed
+        self.update(changed)
 
 
     def do_board_configure(self, widget, event):
+        print 'configure'
+
         gc = widget.get_style().fg_gc[gtk.STATE_NORMAL]
         x,y,width,height = widget.get_allocation()
         self.board_backbuf = gtk.gdk.Pixmap(widget.window, width, height, depth=-1)
@@ -121,6 +124,8 @@ class GoGame(gtk.HBox):
 
 
     def do_board_expose(self, widget, event):
+        print 'expose'
+
         x , y, width, height = event.area
         widget.window.draw_drawable(widget.get_style().fg_gc[gtk.STATE_NORMAL],
                                     self.board_backbuf, x, y, x, y, width, height)
@@ -130,7 +135,11 @@ class GoGame(gtk.HBox):
     # fixme: rendering/updating the whole board is pretty slow. Eliminate the need to
     #        render the whole board when a stone is played (we need a list of modified
     #        locations from somewhere)
+    # fixme: the board doesn't get drawn initially, even though the backbuffer *should*
+    #        have the board in it before our first expose event
     def update_board(self, to_update=None):
+        print 'update'
+
         if to_update == None:
             to_update = range(len(self.goban.board))
 
@@ -169,13 +178,13 @@ class GoGame(gtk.HBox):
 
 
     def on_pass(self, widget):
-        self.goban.pass_move()
-        self.update()
+        changed = self.goban.pass_move()
+        self.update(changed)
 
 
     def on_resign(self, widget):
-        self.goban.resign()
-        self.update()
+        changed = self.goban.resign()
+        self.update(changed)
 
 
     # fixme: Add a widget to show the outcome
@@ -191,9 +200,9 @@ class GoGame(gtk.HBox):
         self.white_cap_value.set_text(str(self.goban.white_captures))
 
 
-    def update(self):
+    def update(self, changed):
         self.update_info()
-        self.update_board()
+        self.update_board(changed)