Wednesday, February 8, 2012

Girrrr: PyGame + Gtk in a GOI World

Back in August, I wrote a bit about how to embed PyGame into a pygtk app (and why it might be interesting to do that). Well, the world has moved on a bit, so today I updated the code sample to work with GObject Introspection.

It wasn't too hard to do, but did take a bit of digging around. I created a diff between the files and then commented on the diff, so you can see the required changes.


 === modified file 'game.py'
--- game.py 2011-08-25 12:14:00 +0000
+++ game.py 2012-02-08 10:22:50 +0000
@@ -1,41 +1,41 @@
import pygame
import os
#you can't import Gtk and GObject in the old way
#so delete these imports
-import gobject
-import gtk
#I haven't made quickly prompts work with introspection yet
#I think it will be easy, but in the meantime, we can't use
#quickly.widgets or quickly.prompts
-from quickly import prompts
#here's how to import GObject and Gtk
#you have to import GdkX11 or you can't get a widget's xid
+from gi.repository import GObject
+from gi.repository import Gtk
+from gi.repository import GdkX11
#"gtk" has to be changed to "Gtk" everywhere
#I used find and replace for this
-class GameWindow(gtk.Window):
+class GameWindow(Gtk.Window):
def __init__(self):
- gtk.Window.__init__(self)
- vbox = gtk.VBox(False, 2)
+ Gtk.Window.__init__(self)
+ vbox = Gtk.VBox(False, 2)
vbox.show()
self.add(vbox)
#create the menu
- file_menu = gtk.Menu()
+ file_menu = Gtk.Menu()
- accel_group = gtk.AccelGroup()
+ accel_group = Gtk.AccelGroup()
self.add_accel_group(accel_group)
- dialog_item = gtk.MenuItem()
+ dialog_item = Gtk.MenuItem()
dialog_item.set_label("Dialog")
dialog_item.show()
dialog_item.connect("activate",self.show_dialog)
file_menu.append(dialog_item)
dialog_item.show()
- quit_item = gtk.MenuItem()
+ quit_item = Gtk.MenuItem()
quit_item.set_label("Quit")
quit_item.show()
quit_item.connect("activate",self.quit)
file_menu.append(quit_item)
quit_item.show()
- menu_bar = gtk.MenuBar()
+ menu_bar = Gtk.MenuBar()
vbox.pack_start(menu_bar, False, False, 0)
menu_bar.show()
- file_item = gtk.MenuItem()
+ file_item = Gtk.MenuItem()
file_item.set_label("_File")
file_item.set_use_underline(True)
file_item.show()
@@ -44,10 +44,10 @@
menu_bar.append(file_item)
#create the drawing area
- da = gtk.DrawingArea()
+ da = Gtk.DrawingArea()
da.set_size_request(300,300)
da.show()
- vbox.pack_end(da)
#pygtk didn't require all of hte arguments for packing
#but Gtk does, so you have to add all the arguments to pack_end here
+ vbox.pack_end(da, False, False, 0)
da.connect("realize",self._realized)
#set up the pygame objects
@@ -70,7 +70,15 @@
self.y += 5
def show_dialog(self, widget, data=None):
- prompts.info("A Pygtk Dialog", "See it works easy")
+ #prompts.info("A Pygtk Dialog", "See it works easy")
#I just hand crafted a dialog until I can get quickly.prompts ported
+ title = "PyGame embedded in Gtk Example"
#a lot of the constants work differently
#gtk.DIALOG_MODAL -> Gtk.DialogFlags.Modal
#gtk.RESPONSE_OK -> Gtk.ResponseType.OK
#There's some info here to get started:
#http://live.gnome.org/PyGObject/IntrospectionPorting
#but I found that I had to poke around with ipython a bit to get it right
+ dialog = Gtk.Dialog(title, None, Gtk.DialogFlags.MODAL,(Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL, Gtk.STOCK_OK, Gtk.ResponseType.OK))
+ content_area = dialog.get_content_area()
+ label = Gtk.Label("See, it still works")
+ label.show()
+ content_area.add(label)
+ response = dialog.run()
+ dialog.destroy()
def quit(self, widget, data=None):
self.destroy()
@@ -87,14 +95,14 @@
return True
def _realized(self, widget, data=None):
#since I imported GdkX11, I can get the xid
#but note that the properties are now function calls
- os.putenv('SDL_WINDOWID', str(widget.window.xid))
+ os.putenv('SDL_WINDOWID', str(widget.get_window().get_xid()))
pygame.init()
pygame.display.set_mode((300, 300), 0, 0)
self.screen = pygame.display.get_surface()
- gobject.timeout_add(200, self.draw)
+ GObject.timeout_add(200, self.draw)
if __name__ == "__main__":
window = GameWindow()
- window.connect("destroy",gtk.main_quit)
+ window.connect("destroy",Gtk.main_quit)
window.show()
- gtk.main()
+ Gtk.main()
I pushed the example to launchpad, in case you want to see the whole thing in context.

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