[gui] Fix typos

gui/cadbiom_gui/gt_gui/chart_view.py

@@ -58,10 +58,18 @@ class ChartView(gtk.DrawingArea):
 
     .. note:: Also instanciated by the overview widget.
 
-    .. note:: DrawingArea can capture key-press-events:
+    .. note:: DrawingArea can capture key-press-events::
+
         - add gtk.gdk.KEY_PRESS_MASK mask to event
         - be sure that the DrawingArea has the focus by using grab_focus() on
         mouse events.
+
+    .. TODO:: Optimize events handling::
+
+        - on_motion_notify: Mouse over the widget, causing multiple calls to
+            find_element() of the top node.
+        - on_expose_event: When the window is covered/partially covered;
+            all the pixmap is redrawn.
     """
 
     def __init__(self, width, height, drawing_style, controler, model):
@@ -137,7 +145,7 @@ class ChartView(gtk.DrawingArea):
         self.pixmap.draw_rectangle(
             self.get_style().white_gc, True, 0, 0, self.draw_width, self.draw_height
         )
-        # draw in the pixmap
+        # draw the full model from its top node in the pixmap
         self.model.draw(self)
         # expose the drawing
         self.window.draw_drawable(self.get_style().fg_gc[gtk.STATE_NORMAL],