Some cleanups of the IconLayout

shell/view/home/FriendsGroup.py

@@ -12,7 +12,7 @@ class FriendsGroup(goocanvas.Group):
 
 		self._shell = shell
 		self._menu_shell = menu_shell
-		self._icon_layout = IconLayout(1200, 900)
+		self._icon_layout = IconLayout(shell.get_grid())
 		self._friends = {}
 
 		me = MyIcon(112)

shell/view/home/IconLayout.py

@@ -1,10 +1,9 @@
 import random
 
 class IconLayout:
-	def __init__(self, width, height):
+	def __init__(self, grid):
 		self._icons = []
-		self._width = width
-		self._height = height
+		self._grid = grid
 
 	def add_icon(self, icon):
 		self._icons.append(icon)
@@ -13,22 +12,13 @@ class IconLayout:
 	def remove_icon(self, icon):
 		self._icons.remove(icon)
 
-	def _is_valid_position(self, icon, x, y):
-		icon_size = icon.props.size
-		border = 20
-
-		if not (border < x < self._width - icon_size - border and \
-		        border < y < self._height - icon_size - border):
-			return False
-		
-		return True
-
 	def _layout_icon(self, icon):
-		while True:
-			x = random.random() * self._width
-			y = random.random() * self._height
-			if self._is_valid_position(icon, x, y):
-				break
+		[x1, y1] = self._grid.convert_to_canvas(1, 1)
+		[x2, y2] = self._grid.convert_to_canvas(78, 59)
+		size = icon.props.size
+
+		x = random.random() * (x2 - x1 - size) 
+		y = random.random() * (y2 - y1 - size)
 
-		icon.props.x = x
-		icon.props.y = y
+		icon.props.x = x + x1
+		icon.props.y = y + y1

shell/view/home/MeshGroup.py

@@ -37,7 +37,7 @@ class MeshGroup(goocanvas.Group):
 
 		self._shell = shell
 
-		self._icon_layout = IconLayout(1200, 900)
+		self._icon_layout = IconLayout(shell.get_grid())
 		self._activities = {}
 
 		self._pservice = PresenceService.get_instance()

sugar/canvas/Grid.py

@@ -31,6 +31,10 @@ class Grid:
 
 		return [grid_x, grid_y]
 
+	def convert_to_canvas(self, grid_x, grid_y):
+		scale = 1200 / Grid.COLS
+		return [grid_x * scale, grid_y * scale]
+
 	def set_constraints(self, component, x, y, width=-1, height=-1):
 		if isinstance(component, gtk.Window):
 			self._layout_window(component, x, y, width, height)

tests/test-icon-layout.py

@@ -17,6 +17,7 @@ from view.home.IconLayout import IconLayout
 from sugar.canvas import IconColor
 from sugar.canvas.IconItem import IconItem
 from sugar.canvas.CanvasView import CanvasView
+from sugar.canvas.Grid import Grid
 
 window = gtk.Window()
 window.connect("destroy", lambda w: gtk.main_quit())
@@ -33,12 +34,12 @@ item = goocanvas.Rect(x=0, y=0, width=1200, height=900,
                       line_width=0.0, fill_color='#e2e2e2')
 root.add_child(item)
 
-icon_layout = IconLayout(1200, 900)
+icon_layout = IconLayout(Grid())
 
-for i in range(0, 20):
+for i in range(0, 200):
 	color = IconColor.IconColor()
 
-	icon = IconItem(size=75, color=color,
+	icon = IconItem(size=125, color=color,
 					icon_name='stock-buddy')
 	root.add_child(icon)