Merge pull request #44 from jonathanrocher/maint/step_3_single_file

Convert stage 3 into a single file

Author: siddhantwahal

ets_tutorial/util/mpl_figure_editor.py

@@ -30,6 +30,8 @@ def update_editor(self):
     def _do_layout(self):
         """Creates sub-widgets and does layout.
         """
+        if not self.value:
+            return
         canvas = FigureCanvasQTAgg(figure=self.value)
         # Allow the figure canvas to expand and shrink with the main widget.
         canvas.setSizePolicy(

stage3.0_first_views/README.md

@@ -0,0 +1,4 @@
+Stage 3 of the application adds a GUI using a simple TraitsUI view:
+- Invoking `configure_traits` on the `ImageFile` model creates a simple
+  view.
+- Separately, a matplotlib window reports detected faces.