[visionegg] Re: vision egg question
- From: Dave Bissig <dbissig@xxxxxxxxx>
- To: visionegg@xxxxxxxxxxxxx
- Date: Tue, 18 Aug 2009 20:31:33 -0400
Just my two cents:
(1) instead of break, you can raise SystemExit when hitting ESC. ... if
memory serves, this works in OSX.
(see below) (dunno how equivalent the two are, but raise SystemExit
def. works).
(2) I've found that defining the escape key works best if you can build it
into a preexisting pygame.event.get(),
as shown here (where you're waiting for the user to mousedown OR press
the escape key):
########################################
def WaitAround():
waiting=0
while waiting != 1:
for event in pygame.event.get():
if event.type == pygame.locals.MOUSEBUTTONDOWN:
xpos,ypos = pygame.mouse.get_pos()
CheckMousePosition(xpos,ypos) ## ...do something based on
where mousedown was...
waiting=1 ## on mousedown, this kicks you back to the main
loop, where viewports are redrawn, etc.
elif event.type == pygame.locals.KEYDOWN:
if event.key == pygame.locals.K_ESCAPE:
screen.close()
screen.close()
## out_file.close() ## in case you were writing a text
file or some such
raise SystemExit
########################################
(3) in case anyone forgot/didn't know, the keyboard constants
(e.g."K_ESCAPE") are documented here:
http://www.pygame.org/docs/ref/key.html
Hope this helps,
Dave Bissig
WSU-SOM
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
On Tue, Aug 18, 2009 at 1:48 PM, Rachel Denison <rdenison@xxxxxxxxxxxx>wrote:
> Thanks for the help, Dav and Ariel! I was also surprised that the vision
> egg display didn't capture focus, even in full screen mode. I still have to
> click somewhere on the screen with the (invisible) cursor before the program
> responds to key presses. Is there some kind of setting that I'm missing?
> I'm using OSX, and cmd-opt-escape works fine for exiting the program. This
> should work for my purposes, but it would be nice if there were a more
> graceful way. I tried Ariel's escape key definition idea. It hasn't worked
> so far for me, but I may just need to play around with it a little more.
>
> Thanks again,
>
> Rachel
>
>
>
> On Tue, Aug 18, 2009 at 8:37 AM, Ariel Rokem <arokem@xxxxxxxxxxxx> wrote:
>
>> Hi Rachel,
>>
>> another way to allow exiting the program while it is running, is
>> defining an escape key (I just use the Escape key :D) and then polling
>> the keyboard every given (rather short) time. Then, if the escape key
>> is pressed when you reach the polling point, break out of your trial
>> loop and terminate the program.
>>
>> Something like this should do it:
>>
>> for event in pygame.event.get(pygame.KEYDOWN):
>> if event.key == pygame.K_ESCAPE:
>> break_set = 1
>>
>> if break_set:
>> break
>>
>> Cheers,
>>
>> Ariel
>>
>>
>> On Mon, Aug 17, 2009 at 11:33 PM, Dav Clark<davclark@xxxxxxxxxxxx> wrote:
>> > Hey Rachel,
>> >
>> > If you're running the app in a window, I'm surprised it doesn't capture
>> > focus when it starts... but it should certainly capture focus if it's
>> full
>> > screen. Is that also a problem in full screen?
>> >
>> > When you are in full screen mode, you can use some operating system
>> escape
>> > thingie to exit. e.g. ctrl-alt-delete in windows, cmd-opt-escape in
>> OSX, I
>> > have no idea in linux & friends. Ultimately, both of these issues are
>> > determined by the OS, and may be configurable in some cases - especially
>> in
>> > linux. For example, you can set in X11 whether a new application will
>> take
>> > focus or not.
>> >
>> > But anyway, I think this is a general enough issue that it's worth
>> posting
>> > to the list, and I think you shouldn't hold back there... it's not a
>> very
>> > high volume list!
>> >
>> > Cheers,
>> > Dav
>> >
>> > On Aug 17, 2009, at 6:57 PM, Rachel Denison wrote:
>> >
>> >> Hi Dav,
>> >>
>> >> I remember you mentioning that you are a vision egg devotee, and I was
>> >> wondering if I could run a question by you before resorting to mailing
>> the
>> >> list. I have an experiment that runs on my full laptop screen, which I
>> >> mirror onto the subject's display. The program takes key presses from
>> the
>> >> subject, but before it will recognize them, I have to click the screen,
>> as
>> >> though to give control of key presses to the visegg window. My
>> forgetting to
>> >> click the screen while scanning can cause confusion when the subject
>> tries
>> >> to press a button and nothing happens and can result in the scanner
>> setting
>> >> the program running at the wrong time, so I'd like to avoid this :) Is
>> there
>> >> any way of ensuring that keyboard control is immediately turned over to
>> the
>> >> visegg program, without my having to click on the screen?
>> >>
>> >> Along these lines, I'd like to have some way of immediately exiting the
>> >> program while it is running, in case something goes awry. When the
>> visegg
>> >> display is not taking up the full screen, it's easy enough to ctrl+c in
>> the
>> >> terminal and stop the program, but when it is a full screen display,
>> the
>> >> machine seems reluctant to let me switch control to the terminal and
>> enter
>> >> any commands. Do you know of an easy way to quit a visegg program while
>> it
>> >> is running on full screen? Or, do you have some other way of displaying
>> your
>> >> experiment in the scanner besides mirroring from your computer that
>> still
>> >> gives precise timing?
>> >>
>> >> Any help would be much appreciated!
>> >>
>> >> Thanks,
>> >>
>> >> Rachel
>> >>
>> >>
>> >
>> > ======================================
>> > The Vision Egg mailing list
>> > Archives: //www.freelists.org/archives/visionegg
>> > Website: http://www.visionegg.org/mailinglist.html
>> >
>>
>>
>>
>> --
>> Ariel Rokem
>> Helen Wills Neuroscience Institute
>> University of California, Berkeley
>> http://argentum.ucbso.berkeley.edu/ariel
>> The Vision Egg mailing list
>> Archives: //www.freelists.org/archives/visionegg
>> Website: http://www.visionegg.org/mailinglist.html
>>
>
>
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