Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!news.mixmin.net!eweka.nl!hq-usenetpeers.eweka.nl!xlned.com!feeder7.xlned.com!news2.euro.net!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.000 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'c++,': 0.07; 'python': 0.09; '(written': 0.09; 'callback': 0.09; 'called.': 0.09; 'explicitely': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'thread,': 0.09; 'gui': 0.11; 'thread': 0.11; 'received:80.91.229.3': 0.16; 'received:dip0.t-ipconnect.de': 0.16; 'received:plane.gmane.org': 0.16; 'received:t-ipconnect.de': 0.16; 'subject:import': 0.16; 'thread.': 0.16; 'true:': 0.16; 'module': 0.19; 'import': 0.21; 'driven': 0.22; 'subject:problem': 0.22; "user's": 0.22; 'bruce': 0.23; 'sets': 0.23; 'this:': 0.23; 'second': 0.24; 'connected': 0.24; 'header:User-Agent:1': 0.26; 'header:X-Complaints-To:1': 0.28; 'fine': 0.28; 'environment': 0.29; 'cocoa': 0.29; 'invoke': 0.29; 'writes:': 0.29; 'skip:_ 10': 0.29; 'primary': 0.30; 'code': 0.31; 'mac': 0.32; 'running': 0.32; 'environment,': 0.33; 'to:addr:python-list': 0.33; 'received:org': 0.36; 'visual': 0.36; 'charset:us-ascii': 0.36; 'skip:3 10': 0.37; 'usual': 0.37; 'subject:: ': 0.38; 'to:addr:python.org': 0.39; 'header:Received:5': 0.40; 'situation': 0.62; 'more': 0.63; 'received:217': 0.68; 'box,': 0.69; 'rendering': 0.71; '100': 0.78 X-Injected-Via-Gmane: http://gmane.org/ To: python-list@python.org From: Dieter Maurer Subject: Re: A thread import problem Date: Sat, 21 Jul 2012 10:32:09 +0200 References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Gmane-NNTP-Posting-Host: pd9e08462.dip0.t-ipconnect.de User-Agent: Gnus/5.1008 (Gnus v5.10.8) XEmacs/21.4.22 (linux) Cancel-Lock: sha1:H9lCuOCWei6md73/cEn7rQihLrA= X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 35 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1342859551 news.xs4all.nl 6869 [2001:888:2000:d::a6]:57005 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:25730 Bruce Sherwood writes: > ... > from visual import box, rate > b = box() > while True: > rate(100) # no more than 100 iterations per second > b.pos.x += .01 > > This works because a GUI environment is invoked by the visual module > in a secondary thread (written mainly in C++, connected to Python by > Boost). The OpenGL rendering of the box in its current position is > driven by a 30-millisecond timer. This works fine with any environment > other than Mac Cocoa. > > However, the Mac Cocoa GUI environment and interact loop are required > to be the primary thread, so the challenge is to have the visual > module set up the Cocoa environment, with the user's program running > in a secondary thread. Any ideas? The usual approach to this situation is to invoke the user code via a callback from the UI main loop or invoke it explicitely after the UI system has been set up immediately before its main loop is called. Might look somehow like this: main thread: from thread import start_new_thread from visual import setup_gui, start_main_loop setup_gui() # sets up the GUI subsystem start_new_thread(lambda: __import__(), ()) start_main_loop()