From ee2aa6ae2beda3d4182470a3d6796d64e9bd791d Mon Sep 17 00:00:00 2001
From: Walter Bender <walter@sugarlabs.org>
Date: Fri, 17 Jan 2014 23:10:47 +0000
Subject: merge ignacio's gtk3 branch

---
(limited to 'sugargame/canvas.py')

diff --git a/sugargame/canvas.py b/sugargame/canvas.py
index 980cb73..3976d5c 100644
--- a/sugargame/canvas.py
+++ b/sugargame/canvas.py
@@ -1,18 +1,19 @@
 import os
-import gtk
-import gobject
+from gi.repository import Gtk
+from gi.repository import GObject
+from sugar3.activity.activity import PREVIEW_SIZE
 import pygame
 import event
 
 CANVAS = None
 
-class PygameCanvas(gtk.EventBox):
-    
+class PygameCanvas(Gtk.EventBox):
+
     """
     mainwindow is the activity intself.
     """
     def __init__(self, mainwindow, pointer_hint = True):
-        gtk.EventBox.__init__(self)
+        GObject.GObject.__init__(self)
 
         global CANVAS
         assert CANVAS == None, "Only one PygameCanvas can be created, ever."
@@ -20,42 +21,77 @@ class PygameCanvas(gtk.EventBox):
 
         # 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.set_can_focus(True)
+
+        self._socket = Gtk.Socket()
         self.add(self._socket)
+
+        self._initialized = False
+
         self.show_all()
 
+    def get_preview(self):
+        """
+        Return preview of main surface
+        How to use in activity:
+            def get_preview(self):
+                return self.game_canvas.get_preview()
+        """
+
+        _tmp_dir = os.path.join(self._mainwindow.get_activity_root(),
+            'tmp')
+        _file_path = os.path.join(_tmp_dir, 'preview.png')
+
+        width = PREVIEW_SIZE[0]
+        height = PREVIEW_SIZE[1]
+        _surface = pygame.transform.scale(self._screen, (width, height))
+        pygame.image.save(_surface, _file_path)
+
+        f = open(_file_path, 'r')
+        preview = f.read()
+        f.close()
+        os.remove(_file_path)
+	
+        return preview
+
     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 
+        # 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)
+        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."
-        
+        # PygameCanvas.run_pygame can only be called once
+        if self._initialized:
+            return
+
         # 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())
+        if pygame.display.get_surface() is not None:
+            pygame.display.quit()
         pygame.init()
-        
+
         # Restore the default cursor.
-        self._socket.window.set_cursor(None)
+        self._socket.props.window.set_cursor(None)
 
         # Initialize the Pygame window.
         r = self.get_allocation()
-        pygame.display.set_mode((r.width, r.height), pygame.RESIZABLE)
+        # pygame.display.set_mode((r.width, r.height), pygame.RESIZABLE)
+        self._screen = 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()
+
+        self._initialized = True
         return False
 
     def get_pygame_widget(self):
--
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