From 8c22cc83d06ef0da66e8b664b82940d7dcd1c7fd Mon Sep 17 00:00:00 2001
From: Walter Bender <walter.bender@gmail.com>
Date: Sat, 02 Jun 2012 04:19:30 +0000
Subject: don't drag canvas while program is executing

---
diff --git a/TurtleArt/talogo.py b/TurtleArt/talogo.py
index 4aae737..db44a8e 100644
--- a/TurtleArt/talogo.py
+++ b/TurtleArt/talogo.py
@@ -156,6 +156,7 @@ class LogoCode:
             from tagplay import stop_media
             stop_media(self)
         self.tw.active_turtle.show()
+        self.tw.running_blocks = False
 
     def def_prim(self, name, args, fcn, rprim=False):
         """ Define the primitives associated with the blocks """
@@ -215,6 +216,7 @@ class LogoCode:
                     except IndexError:
                         self.tw.showlabel('#nostack')
                         self.tw.showblocks()
+                        self.tw.running_blocks = False
                         return None
                     if type(convert(x, float, False)) == float:
                         if int(float(x)) == x:
@@ -498,6 +500,7 @@ class LogoCode:
                         except ValueError:
                             debug_output('generator already executing',
                                          self.tw.running_sugar)
+                            self.tw.running_blocks = False
                             return False
                     else:
                         return False
@@ -508,12 +511,14 @@ class LogoCode:
                         self.hidden_turtle = None
                     else:
                         self.tw.active_turtle.show()
+                    self.tw.running_blocks = False
                     return False
         except logoerror, e:
             self.tw.showblocks()
             self.tw.display_coordinates()
             self.tw.showlabel('syntaxerror', str(e))
             self.tw.turtles.show_all()
+            self.tw.running_blocks = False
             return False
         return True
 
diff --git a/TurtleArt/tawindow.py b/TurtleArt/tawindow.py
index 2d4c38e..c2ae04b 100644
--- a/TurtleArt/tawindow.py
+++ b/TurtleArt/tawindow.py
@@ -135,6 +135,7 @@ class TurtleArtWindow():
         self.mouse_flag = 0
         self.mouse_x = 0
         self.mouse_y = 0
+        self.running_blocks = False
 
         try:
             locale.setlocale(locale.LC_NUMERIC, '')
@@ -1198,7 +1199,8 @@ class TurtleArtWindow():
         self.dragging_canvas[1] = x
         self.dragging_canvas[2] = y
         if spr is None:
-            self.dragging_canvas[0] = True
+            if not self.running_blocks:
+                self.dragging_canvas[0] = True
             return True
         self.dragging_canvas[0] = False
         self.selected_spr = spr
@@ -2242,6 +2244,7 @@ class TurtleArtWindow():
         if len(self.block_list.get_similar_blocks('block', 'savesvg')) > 0:
             if self.canvas.cr_svg is None:
                 self.canvas.setup_svg_surface()
+        self.running_blocks = True
         self._start_plugins()  # Let the plugins know we are running.
         top = find_top_block(blk)
         self.lc.run_blocks(top, self.just_blocks(), True)
--
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