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README.md

README.md

== Sugargame ==

Sugargame is a Python package which allows [http://www.pygame.org/ Pygame] programs to run well under Sugar. It is fork of the olcpgames framework, which is no longer maintained.

http://git.sugarlabs.org/projects/sugargame

What it does:

  • Wraps a Sugar activity around an existing Pygame program with few changes
  • Allows Sugar toolbars and other widgets to be added to the activity UI
  • Provides hooks for saving to and restoring from the Journal

==== Differences between Sugargame and olpcgames ====

The olpcgames framework provides a wrapper around Pygame which attempts to allow a Pygame program to run mostly unmodified under Sugar. To this end, the Pygame program is run in a separate thread with its own Pygame message loop while the main thread runs the GTK message loop. Also, olpcgames wraps Sugar APIs such as the journal and mesh into a Pygame-like API.

Sugargame takes a simpler approach; it provides a way to embed Pygame into a GTK widget. The Sugar APIs are used to interact with Sugar, the Pygame APIs are used for the game.

Sugargame advantages:

  • Simpler code
  • More elegant interface between Pygame and GTK
  • Runs as a single thread: no thread related segfaults
  • Possible to use Sugar widgets with Pygame

Sugargame limitations:

  • No support for Pango or SVG sprites (yet)

== Using Sugargame ==

See also [[Development Team/Sugargame/Examples]].

==== Wrapping a Pygame program ====

To use Sugargame to Sugarize a Pygame program, set up an activity directory and copy the Sugargame package to it.

The activity directory should look something like this:

activity/ - Activity directory: activity.info, SVG icon, etc. sugargame/ - Sugargame package MyActivity.py - Activity class mygame.py - Pygame code setup.py - Install script

To make the Activity class, start with test/TestActivity.py from the Sugargame distribution.

The activity should create a single PygameCanvas widget and call run_pygame on it.
Pass the main loop function of the Pygame program.

self._canvas = sugargame.canvas.PygameCanvas(self) self.set_canvas(self._canvas)

# Start the game running. self._canvas.run_pygame(self.game.run)

In your Pygame main loop, pump the GTK message loop:

while gtk.events_pending(): gtk.main_iteration()

==== Adding Pygame to a PyGTK activity ====

To add Pygame to an existing Sugar activity, create a PygameCanvas widget and call run_pygame on it.

widget = sugargame.canvas.PygameCanvas(self) vbox.pack_start(widget)

widget.run_pygame(self.game.run)

Due to limitations of Pygame and SDL, there can only be one PygameCanvas in the entire activity.

The argument to run_pygame is a function structured like a Pygame program. In the main loop, remember to dispatch GTK messages using gtk.main_iteration().

def main_loop(): clock = pygame.time.Clock() screen = pygame.display.get_surface()

    while self.running:
        # Pump GTK messages.
        while gtk.events_pending():
            gtk.main_iteration()

        # Pump PyGame messages.
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                return
            elif event.type == pygame.VIDEORESIZE:
                pygame.display.set_mode(event.size, pygame.RESIZABLE)

        # Check the mouse position
        x, y = pygame.mouse.get_pos()

        # Clear Display
        screen.fill((255,255,255)) #255 for white

        # Draw stuff here
        .................

        # Flip Display
        pygame.display.flip()  

        # Try to stay at 30 FPS
        self.clock.tick(30)

== Support ==

For help with Sugargame, please email the Sugar Labs development list:

: sugar-devel@lists.sugarlabs.org

Sugargame is developed by Wade Brainerd wadetb@gmail.com.

It is loosely based on the source code to the olpcgames framework, developed by the One Laptop Per Child project.

=== Changelog ===

====v1.1====

  • Fix bugs in event handling. (Pablo Moleri)
  • Remove reference to gtk.Socket.get_window() method, which is missing in older versions of PyGTK.

====v1.0====

  • Initial version of Sugargame
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