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import os
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):
"""
mainwindow is the activity intself.
"""
def __init__(self, mainwindow, pointer_hint = True):
GObject.GObject.__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_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
# constructor never returns and the activity freezes.
GObject.idle_add(self._run_pygame_cb, main_fn)
def _run_pygame_cb(self, main_fn):
# PygameCanvas.run_pygame can only be called once
if self._initialized:
return
# Preinitialize Pygame with the X window ID.
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.props.window.set_cursor(None)
# Initialize the Pygame window.
r = self.get_allocation()
# 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):
return self._socket
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