From 7990bc0d3126408e2728e3f41745e1332182de5b Mon Sep 17 00:00:00 2001
From: Marco Pesenti Gritti <marco@localhost.localdomain>
Date: Thu, 17 Aug 2006 08:32:59 +0000
Subject: Get activity bar and activity creation to work

---
diff --git a/shell/HomeWindow.py b/shell/HomeWindow.py
index d44add6..1449d0d 100644
--- a/shell/HomeWindow.py
+++ b/shell/HomeWindow.py
@@ -3,17 +3,27 @@ import goocanvas
 
 from sugar.canvas.IconItem import IconItem
 
+class ActivityItem(IconItem):
+	def __init__(self, activity):
+		IconItem.__init__(self, activity.get_icon(), 'white', 30)
+		self._activity = activity
+
+	def get_activity_id(self):
+		return self._activity.get_id()
+
 class ActivityBar(goocanvas.Group):
-	def __init__(self, registry):
+	def __init__(self, shell):
 		goocanvas.Group.__init__(self)
 
+		self._shell = shell
+
+		registry = shell.get_registry()
 		for activity in registry.list_activities():
 			if activity.get_show_launcher():
 				self.add_activity(activity)
 
 	def add_activity(self, activity):
-		item = IconItem(icon_name=activity.get_icon(),
-						color='white', width=42, height=42)
+		item = ActivityItem(activity)
 		self.add_child(item)
 
 class Background(goocanvas.Group):
@@ -43,7 +53,8 @@ class Model(goocanvas.CanvasModelSimple):
 		background = Background()
 		root.add_child(background)
 
-		activity_bar = ActivityBar(shell.get_registry())
+		activity_bar = ActivityBar(shell)
+		activity_bar.translate(50, 860)
 		root.add_child(activity_bar)
 
 class HomeWindow(gtk.Window):
@@ -55,14 +66,27 @@ class HomeWindow(gtk.Window):
 		self.connect('realize', self.__realize_cb)
 
 		canvas = goocanvas.CanvasView()
+
 		canvas_model = Model(shell)
 		canvas.set_bounds(0, 0, 1200, 900)
 		canvas.set_scale(float(800) / float(1200))
 		canvas.set_size_request(800, 600)
+
+		canvas.connect("item_view_created", self.__item_view_created_cb)
+
 		self.add(canvas)
 		canvas.show()
 
 		canvas.set_model(canvas_model)
 
+	def __item_view_created_cb(self, view, item_view, item):
+		if isinstance(item, ActivityItem):
+			item_view.connect("button_press_event",
+							  self.__activity_button_press_cb,
+							  item.get_activity_id())
+
+	def __activity_button_press_cb(self, view, target, event, activity_id):
+		self._shell.start_activity(activity_id)
+
 	def __realize_cb(self, window):
 		self.window.set_type_hint(gtk.gdk.WINDOW_TYPE_HINT_DESKTOP)
diff --git a/sugar/canvas/IconItem.py b/sugar/canvas/IconItem.py
index 66ec193..7be096d 100644
--- a/sugar/canvas/IconItem.py
+++ b/sugar/canvas/IconItem.py
@@ -3,52 +3,47 @@ import re
 import gobject
 import gtk
 import goocanvas
-import rsvg
 
-class IconView(goocanvas.ItemViewSimple):
-	def __init__(self, handle, canvas_view, parent_view):
-		goocanvas.SimpleItemView.__init__(self, canvas_view, parent_view)
-		self._handle = handle
+from sugar.util import GObjectSingletonMeta
 
-	def do_paint(self, cr, bounds, scale):
-		self._handle.render_cairo(cr)
-		return self.bounds
+class IconCache(gobject.GObject):
+	__metaclass__ = GObjectSingletonMeta
 
-class IconItem(goocanvas.Image):
-	__gproperties__ = {
-		'icon-name': (str, None, None, None, gobject.PARAM_READWRITE),
-		'color': (str, None, None, None, gobject.PARAM_READWRITE)
-	}
-
-	def __init__(self, **kwargs):
-		goocanvas.Image.__init__(self, **kwargs)
-
-	def do_set_property(self, pspec, value):
-		if pspec.name == 'icon-name':
-			self._icon_name = value
-		elif pspec.name == 'color':
-			self._color = value
-		else:
-			raise AttributeError, 'unknown property %s' % pspec.name
+	def __init__(self):
+		gobject.GObject.__init__(self)
+		self._icons = {}
 
-	def do_get_property(self, pspec):
-		if pspec.name == 'icon-name':
-			return self._icon_name
-		if pspec.name == 'color':
-			return self._color
-
-	def create_view(self, canvas_view, parent_view):
-		print 'Create view'
+	def _create_icon(self, name, color, size):
 		theme = gtk.icon_theme_get_default()
-		info = theme.lookup_icon(self._icon_name, 48, 0)
+		info = theme.lookup_icon(name, size, 0)
 		icon_file = open(info.get_filename(), 'r')
 		data = icon_file.read()
 		icon_file.close()
 
-		if self._color != None:
-			style = '.icon-color {fill: %s;}' % self._color
+		if color != None:
+			style = '.icon-color {fill: %s;}' % color
 			data = re.sub('\.icon-color \{.*\}', style, data)
 
-		handle = rsvg.Handle(data=data)
+		loader = gtk.gdk.pixbuf_loader_new_with_mime_type('image/svg-xml')
+		loader.set_size(size, size)
+		loader.write(data)
+		loader.close()
+		
+		return loader.get_pixbuf()
+
+	def get_icon(self, name, color, size):
+		key = (name, color, size)
+		if self._icons.has_key(key):
+			return self._icons[key]
+		else:
+			icon = self._create_icon(name, color, size)
+			self._icons[key] = icon
+			return icon
+
+class IconItem(goocanvas.Image):
+	def __init__(self, icon_name, color, size, **kwargs):
+		goocanvas.Image.__init__(self, **kwargs)
 
-		return IconView(handle, canvas_view, parent_view)
+		icon_cache = IconCache()
+		pixbuf = icon_cache.get_icon(icon_name, color, size)
+		self.set_property('pixbuf', pixbuf)
diff --git a/sugar/util.py b/sugar/util.py
index bfddf32..9cb7d55 100644
--- a/sugar/util.py
+++ b/sugar/util.py
@@ -4,6 +4,20 @@ import random
 import binascii
 import string
 
+import gobject
+
+class GObjectSingletonMeta(gobject.GObjectMeta):
+    """GObject Singleton Metaclass"""
+
+    def __init__(klass, name, bases, dict):
+        gobject.GObjectMeta.__init__(klass, name, bases, dict)
+        klass.__instance = None
+
+    def __call__(klass, *args, **kwargs):
+        if klass.__instance is None:
+            klass.__instance = gobject.GObjectMeta.__call__(klass, *args, **kwargs)
+        return klass.__instance
+
 def _stringify_sha(sha_hash):
 	"""Convert binary sha1 hash data into printable characters."""
 	print_sha = ""
--
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