Mouse no rt

[Arnaud Boré]

Dear expyriment experts,

Thank you again for your quick answers.

I've got an issue using the mouse. I use wait_press and sometimes I don't receive any rt. I tried to check what is the event_id but it doesn't give me any extra information and I tried to clear the buffer but it doesn't help either.

Is there something that I don't understand ?

Thank you in advance for your help

Arnaud

[Arnaud Boré]

Just to be clear sometimes I don't receive any rt even if I click with the mouse. I think I should not get any rt only when I don't click.

Thank you

Arnaud

[Oliver Lindemann]

I do not understand what you mean with "you don't receive a rt"? Which value has rt? Could you send the code? Which operating system do you use?

Oliver

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Dr. Oliver Lindemann
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[Arnaud Boré]

Thank Olivier for your quick response.

Running this script "creates" the bug:

import pygame
pygame.init()
pygame.display.set_mode((300, 300))
while 1:
    if pygame.event.get(pygame.MOUSEBUTTONUP):
            print 'up'

I checked into pygame code and it looks like this issue: https://bitbucket.org/pygame/pygame/issues/141/mousemotion-prevents-mousebuttonup-event

When you move and click at the same time, the event buffer is fill up to 127 elements capacity and no BUTTONUP event even if there are some BUTTONDOWN.

I think it's a pygame error, is there a way to bypass this ? 

Thank you

Arnaud

[Oliver Lindemann]

Your question is obviously related to Pygame programming not Expyriment! Please contact Pygame newsgroups in this cases. But you might find it helpful to see how Expyriment is doing it: https://github.com/expyriment/expyriment/blob/master/expyriment/io/_mouse.py#L248

You should disable buffering of mouse motions to avoid the your Pygame buffer is full within seconds: ```pygame.event.set_blocked(pygame.MOUSEMOTION)```

Fortunately, Expyriment cares about all this issues. Therefore I assume that this works, right? https://gist.github.com/lindemann09/f48cb912ca6b2cde0dbaa06f90b5fcef

Best,
Oliver