Add a window class to graphics, it contains a canvas.

shell/view/frame/PanelWindow.py

@@ -18,25 +18,21 @@ import gtk
 import hippo
 
 from sugar.graphics import units
+from sugar.graphics.window import Window
 
-class PanelWindow(gtk.Window):
+class PanelWindow(Window):
     def __init__(self, orientation):
-        gtk.Window.__init__(self)
+        Window.__init__(self)
         self._orientation = orientation
 
         self.set_decorated(False)
         self.connect('realize', self._realize_cb)
 
-        self._canvas = hippo.Canvas()
-
         self._bg = hippo.CanvasBox(background_color=0x414141ff,
                                    orientation=self._orientation)
+        self.set_root(self._bg)
 
         self._update_size()
-        self._canvas.set_root(self._bg)
-
-        self.add(self._canvas)
-        self._canvas.show()
     
         screen = gtk.gdk.screen_get_default()
         screen.connect('size-changed', self._size_changed_cb)
@@ -44,9 +40,6 @@ class PanelWindow(gtk.Window):
     def get_root(self):
         return self._bg
         
-    def get_canvas(self):
-        return self._canvas
-        
     def _update_size(self):
         padding = units.grid_to_pixels(1)
         if self._orientation == hippo.ORIENTATION_HORIZONTAL:

shell/view/frame/clipboardpanelwindow.py

@@ -33,7 +33,10 @@ class ClipboardPanelWindow(PanelWindow):
         self.add_events(gtk.gdk.BUTTON_PRESS_MASK |
                         gtk.gdk.POINTER_MOTION_HINT_MASK)
         self.connect("motion_notify_event", box.motion_notify_event_cb)
-        self.get_canvas().connect("button_press_event", box.button_press_event_cb)
+
+        # FIXME I'm not sure we should expose the canvas in the Window API
+        self._canvas.connect("button_press_event", box.button_press_event_cb)
+
         self.connect("drag_end", box.drag_end_cb)
         self.connect("drag_data_get", box.drag_data_get_cb)
 

sugar/graphics/Makefile.am

@@ -22,4 +22,5 @@ sugar_PYTHON =			\
 	timeline.py         	\
 	toolbar.py		\
 	units.py		\
+	window.py		\
 	xocolor.py

sugar/graphics/window.py

@@ -0,0 +1,14 @@
+import hippo
+import gtk
+
+class Window(gtk.Window):
+    def __init__(self, window_type=gtk.WINDOW_TOPLEVEL):
+        gtk.Window.__init__(self, window_type)
+
+        self._canvas = hippo.Canvas()
+        self.add(self._canvas)
+        self._canvas.show()
+
+    def set_root(self, root):
+        self._canvas.set_root(root)
+