From bcf8fc6694df68e0d44b8060dff14878549ae1f4 Mon Sep 17 00:00:00 2001
From: Daniel Francis <francis@sugarlabs.org>
Date: Fri, 21 Dec 2012 01:51:29 +0000
Subject: Starter port to sugargame

Signed-off-by: Daniel Francis <francis@sugarlabs.org>
---
(limited to 'sugargame/canvas.py')

diff --git a/sugargame/canvas.py b/sugargame/canvas.py
new file mode 100644
index 0000000..980cb73
--- /dev/null
+++ b/sugargame/canvas.py
@@ -0,0 +1,62 @@
+import os
+import gtk
+import gobject
+import pygame
+import event
+
+CANVAS = None
+
+class PygameCanvas(gtk.EventBox):
+    
+    """
+    mainwindow is the activity intself.
+    """
+    def __init__(self, mainwindow, pointer_hint = True):
+        gtk.EventBox.__init__(self)
+
+        global CANVAS
+        assert CANVAS == None, "Only one PygameCanvas can be created, ever."
+        CANVAS = self
+
+        # Initialize Events translator before widget gets "realized".
+        self.translator = event.Translator(mainwindow, self)
+        
+        self._mainwindow = mainwindow
+
+        self.set_flags(gtk.CAN_FOCUS)
+        
+        self._socket = gtk.Socket()
+        self.add(self._socket)
+        self.show_all()
+
+    def run_pygame(self, main_fn):
+        # Run the main loop after a short delay.  The reason for the delay is that the
+        # Sugar activity is not properly created until after its constructor returns.
+        # If the Pygame main loop is called from the activity constructor, the 
+        # constructor never returns and the activity freezes.
+        gobject.idle_add(self._run_pygame_cb, main_fn)
+
+    def _run_pygame_cb(self, main_fn):
+        assert pygame.display.get_surface() is None, "PygameCanvas.run_pygame can only be called once."
+        
+        # Preinitialize Pygame with the X window ID.
+        assert pygame.display.get_init() == False, "Pygame must not be initialized before calling PygameCanvas.run_pygame."
+        os.environ['SDL_WINDOWID'] = str(self._socket.get_id())
+        pygame.init()
+        
+        # Restore the default cursor.
+        self._socket.window.set_cursor(None)
+
+        # Initialize the Pygame window.
+        r = self.get_allocation()
+        pygame.display.set_mode((r.width, r.height), pygame.RESIZABLE)
+
+        # Hook certain Pygame functions with GTK equivalents.
+        self.translator.hook_pygame()
+
+        # Run the Pygame main loop.
+        main_fn()
+        return False
+
+    def get_pygame_widget(self):
+        return self._socket
--
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