From 0d5407ff59f3540f48c081552a3324a952e42c5e Mon Sep 17 00:00:00 2001
From: Walter Bender <walter.bender@gmail.com>
Date: Fri, 22 Feb 2013 20:59:57 +0000
Subject: update screen constants when rotating screen

---
diff --git a/TurtleArt/tawindow.py b/TurtleArt/tawindow.py
index ccaaec2..2342ab0 100644
--- a/TurtleArt/tawindow.py
+++ b/TurtleArt/tawindow.py
@@ -239,23 +239,7 @@ class TurtleArtWindow():
 
         self.canvas.clearscreen(False)
 
-        CONSTANTS['titlex'] = int(-(self.canvas.width * TITLEXY[0]) / \
-            (self.coord_scale * 2))
-        CONSTANTS['leftx'] = int(-(self.canvas.width * TITLEXY[0]) / \
-            (self.coord_scale * 2))
-        CONSTANTS['rightx'] = 0
-        CONSTANTS['titley'] = int((self.canvas.height * TITLEXY[1]) / \
-            (self.coord_scale * 2))
-        CONSTANTS['topy'] = int((self.canvas.height * (TITLEXY[1] - 0.125)) / \
-            (self.coord_scale * 2))
-        CONSTANTS['bottomy'] = 0
-        CONSTANTS['leftpos'] = int(-self.canvas.width / (self.coord_scale * 2))
-        CONSTANTS['toppos'] = int(self.canvas.height / (self.coord_scale * 2))
-        CONSTANTS['rightpos'] = int(self.canvas.width / (self.coord_scale * 2))
-        CONSTANTS['bottompos'] = int(-self.canvas.height / \
-                                          (self.coord_scale * 2))
-        CONSTANTS['width'] = int(self.canvas.width / self.coord_scale)
-        CONSTANTS['height'] = int(self.canvas.height / self.coord_scale)
+        self._configure_cb(None)
 
         self._icon_paths = [os.path.join(self.path, 'icons')]
         self.turtleart_plugins = []
@@ -402,6 +386,7 @@ class TurtleArtWindow():
         self.window.connect("button-release-event", self._buttonrelease_cb)
         self.window.connect("motion-notify-event", self._move_cb)
         self.window.connect("key-press-event", self._keypress_cb)
+        gtk.gdk.screen_get_default().connect('size-changed', self._configure_cb)
 
         target = [("text/plain", 0, 0)]
         self.window.drag_dest_set(gtk.DEST_DEFAULT_ALL, target,
@@ -493,6 +478,38 @@ class TurtleArtWindow():
         ''' Check to see if project has any blocks in use '''
         return len(self.just_blocks()) == 1
 
+    def _configure_cb(self, event):
+        ''' Screen size has changed '''
+        self.width = gtk.gdk.screen_width()
+        self.height = gtk.gdk.screen_height()
+        CONSTANTS['titlex'] = int(-(self.width * TITLEXY[0]) / \
+            (self.coord_scale * 2))
+        CONSTANTS['leftx'] = int(-(self.width * TITLEXY[0]) / \
+            (self.coord_scale * 2))
+        CONSTANTS['rightx'] = 0
+        CONSTANTS['titley'] = int((self.height * TITLEXY[1]) / \
+            (self.coord_scale * 2))
+        CONSTANTS['topy'] = int((self.height * (TITLEXY[1] - 0.125)) / \
+            (self.coord_scale * 2))
+        CONSTANTS['bottomy'] = 0
+        CONSTANTS['leftpos'] = int(-self.width / (self.coord_scale * 2))
+        CONSTANTS['toppos'] = int(self.height / (self.coord_scale * 2))
+        CONSTANTS['rightpos'] = int(self.width / (self.coord_scale * 2))
+        CONSTANTS['bottompos'] = int(-self.height / (self.coord_scale * 2))
+        CONSTANTS['width'] = int(self.width / self.coord_scale)
+        CONSTANTS['height'] = int(self.height / self.coord_scale)
+
+        if event is None:
+            return
+
+        # If there are any constant blocks on the canvas, relabel them
+        for blk in self.just_blocks():
+            if blk.name in ['leftpos', 'toppos', 'rightpos', 'bottompos',
+                            'width', 'height']:
+                blk.spr.set_label('%s = %d' % (block_names[blk.name][0],
+                                               CONSTANTS[blk.name]))
+                blk.resize()
+
     def _expose_cb(self, win=None, event=None):
         ''' Repaint '''
         self.do_expose_event(event)
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