From a4c1393cde5aca141ceac2c7c7aa4e4177f6f96f Mon Sep 17 00:00:00 2001
From: Walter Bender <walter.bender@gmail.com>
Date: Fri, 09 Dec 2011 17:11:03 +0000
Subject: more simple workaround for get_preview problem

---
diff --git a/TurtleArtActivity.py b/TurtleArtActivity.py
index 17a5941..2518d91 100644
--- a/TurtleArtActivity.py
+++ b/TurtleArtActivity.py
@@ -79,6 +79,11 @@ class TurtleArtActivity(activity.Activity):
         _logger.debug('_setup_canvas')
         self._canvas = self._setup_canvas(self._setup_scrolled_window())
 
+        # FIX ME: not sure how or why self.canvas gets overwritten
+        # It is set to self.sw in _setup_canvas but None here.
+        # We need self.canvas for generating the preview image
+        self.canvas = self.sw
+
         _logger.debug('_setup_palette_toolbar')
         self._setup_palette_toolbar()
         self._setup_help_toolbar()
@@ -685,7 +690,6 @@ class TurtleArtActivity(activity.Activity):
         ''' Create a scrolled window to contain the turtle canvas. '''
         self.sw = gtk.ScrolledWindow()
         self.set_canvas(self.sw)
-        _logger.debug('in scrolled window: %s' % (str(self.canvas)))
         self.sw.set_policy(gtk.POLICY_AUTOMATIC, gtk.POLICY_AUTOMATIC)
         self.sw.show()
 
@@ -761,35 +765,6 @@ class TurtleArtActivity(activity.Activity):
                                                   _('turtle blocks')])
         _logger.debug('Wrote to file: %s' % file_path)
 
-    def get_preview(self):
-        ''' Override of activity.get_preview since self.canvas is
-        somehow being reset '''
-        from sugar.graphics import style
-        _logger.debug('in get_preview: %s' % (str(self.canvas)))
-        if self.canvas is None:
-            self.canvas = self.sw
-        if not hasattr(self.canvas, 'get_snapshot'):
-            _logger.debug('no get_snapshot attribute')
-            return
-        pixmap = self.canvas.get_snapshot((-1, -1, 0, 0))
-
-        width, height = pixmap.get_size()
-        pixbuf = gtk.gdk.Pixbuf(gtk.gdk.COLORSPACE_RGB, 0, 8, width, height)
-        pixbuf = pixbuf.get_from_drawable(pixmap, pixmap.get_colormap(),
-                                          0, 0, 0, 0, width, height)
-        pixbuf = pixbuf.scale_simple(style.zoom(300), style.zoom(225),
-                                     gtk.gdk.INTERP_BILINEAR)
-
-        preview_data = []
-
-        def save_func(buf, data):
-            data.append(buf)
-
-        pixbuf.save_to_callback(save_func, 'png', user_data=preview_data)
-        preview_data = ''.join(preview_data)
-
-        return preview_data
-
     def read_file(self, file_path, run_it=True):
         ''' Read a project in and then run it. '''
         if hasattr(self, 'tw'):
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