As I noted before, the breakpoint causes window focus to change and due to some circumstance of the window losing focus, the odd behavior seems to be avoided. The cause of the ALT key bug is related to windows and pyglet not correctly handling the ALT key (which will open a window menu bar in some situations): when the alt key is pressed, windows sends a special event to pyglet. The event is handled but the return value back to windows was never correct (source of the bug). The default behavior in this case is to display a window menu bar, which windows attempts to do, but it is not implemented in pyglet and this condition puts the window and pyglet's event queue into an undefined state, and causes some events to be dropped. In this case there events are key presses/releases. Nothing cosmic about it. Please see the link I previously posted for more information.
On Sunday, March 22, 2015 at 12:45:49 PM UTC-5, pyglet_has_bugs wrote: > > Thank you very much for your thorough reply. Your guess about the > breakpoints doesn't make sense to me, because the order of causality does > not flow in that order. When my program is in a state in which pressing A > will not trigger a key press event (because I've just pressed and released > ALT), and I press A, then no key pressed event fires--unless there is a > break point in on_key_press. So you see, the breakpoint can only be hit if > the code *has already performed correctly in the place that it normally > fails*. This indicates to me that something horrible is going on. I am > amazed. > > On Sun, Mar 22, 2015 at 1:52 AM, Leif Theden <leif....@gmail.com > <javascript:>> wrote: > >> I fixed it a while ago, but the fix was never merged. Tonight I applied >> an old patch I made and made a pull request. It may be a few days until >> this is fixed in bitbucket. In the mean time, don't assign anything to the >> ALT key. This bug has been known for a long time, but only affects windows >> users, and is related to the ALT key, which not many people use anyway. >> >> I can't say how the breakpoints affects it for certain, but my guess is >> that the breakpoints are causing the pyglet window to lose focus, which >> interferes with key events in windows, and those side effects don't cause >> the behavior that was causing erratic input after pressing ALT. A debugger >> should never cause functions to work differently. In this case it is more >> related to the windows window manager more than anything. >> >> >> On Saturday, March 21, 2015 at 8:54:06 PM UTC-7, pyglet_has_bugs wrote: >> >>> Wow, so this has been known for a while, and you just finally fixed it? >>> Just for me? :o :D >>> >>> On Saturday, March 21, 2015 at 8:31:02 PM UTC-4, Leif Theden wrote: >>>> >>>> Please, your nick 'pyglet_has_bugs' is a bit excessive; 99.999% >>>> software projects have bugs. In any case, thank you for the detailed bug >>>> report. In the future please submit bug reports to >>>> https://bitbucket.org/pyglet/pyglet/issues. Finally, I've fixed the >>>> problem on my branch and submitted a pull request. >>>> >>>> In case anyone is interested, the issue is documented here: >>>> https://code.google.com/p/pyglet/issues/detail?id=462&q= >>>> leif&colspec=ID%20Stars%20Type%20Status%20OpSys%20Modified%20Summary >>>> >>>> >>>> On Saturday, March 21, 2015 at 5:19:02 PM UTC-5, pyglet_has_bugs wrote: >>>>> >>>>> Someone on reddit.com/r/learnpython says they couldn't reproduce the >>>>> bug with Pyglet 1.2.2 and Python 3 on Linux. >>>>> >>>>> http://redd.it/2zqtyf >>>>> >>>> -- >> You received this message because you are subscribed to a topic in the >> Google Groups "pyglet-users" group. >> To unsubscribe from this topic, visit >> https://groups.google.com/d/topic/pyglet-users/DuHs6HxXSm0/unsubscribe. >> To unsubscribe from this group and all its topics, send an email to >> pyglet-users...@googlegroups.com <javascript:>. >> To post to this group, send email to pyglet...@googlegroups.com >> <javascript:>. >> Visit this group at http://groups.google.com/group/pyglet-users. >> For more options, visit https://groups.google.com/d/optout. >> > > -- You received this message because you are subscribed to the Google Groups "pyglet-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to pyglet-users+unsubscr...@googlegroups.com. To post to this group, send email to pyglet-users@googlegroups.com. Visit this group at http://groups.google.com/group/pyglet-users. For more options, visit https://groups.google.com/d/optout.
