[open] Cursor position reset

GuidoCor

Hi,

I've encounter a curious problem while programming an experiment in OpenSesame and I would like to know if anyone could figure out what is going on. It's an experiment where I present some images and the participant has to rate them with the mouse, clicking on one of various buttons (from the basic button widget). I wanted the cursor position to reset at the begining of every trial so that the cursor is always slightly under an imaginary line that cuts the screen by the middle (horizontally). With that in mind, I programmed this function on Python inline code. I placed the inline code that resets the mouse position before the buttons widgets appears . Now, the curious thing is that it works when I run the experiment in a window but it doesn't work in fullscreen and I can't figure out why.

The code that I'm using is:

from openexp.mouse import mouse
my_mouse = mouse(exp)

my_mouse.set_pos(pos=(width,height))

Best Regards, Guido

Edwin

Hi Guido,

Two potential issues:

Your code

Your code will currently reset the mouse to the bottom right corner, because you pass this as the new coordinate: pos=(width,height).

If you want it reset to the screen centre, use the following:

my_mouse.set_pos(pos=(exp.get("width")/2, exp.get("height")/2))

PsychoPy back-end

If you're using PsychoPy, it will likely be an issue with its pyglet back-end. This does not support mouse position assignment. You could resolve the issue by switching to the PyGame back-end.

Good luck!

GuidoCor

Hi! Thank you for you comment. Maybe the second could be the problem, in the first width and height are set as exp.get() variables previously .

I will try and comment : )