draw with and track mouse at the same time
Hi everyone,
sorry, another question by me. This time I would like to draw something with the mouse and of course this has to be tracked for the later analysis.
In the forum I found a script which does the drawing well.
Here it is:
from openexp.canvas import canvas from openexp.mouse import mouse my_mouse = mouse(exp, buttonlist = ([1]), visible = True) my_canvas = canvas(exp) dot = exp.pool[u'dot3.png'] my_canvas.show() start = clock.time() my_mouse.set_pos(pos=(0, 0)) while clock.time() - start <= 3000: button, position, timestamp = my_mouse.get_click(timeout=10) x,y = position if button is not None else (None,None) if button is not None: (x0, y0) = (None,None) while my_mouse.get_pressed()==(1,0,0): (x, y), timestamp = my_mouse.get_pos() if (x0,y0) != (None, None): my_canvas.image(dot, x=x0, y=y0) my_canvas.line(x0,y0,x,y, penwidth=8) my_canvas.image(dot, x=x, y=y) else: my_canvas.image(dot, x=x, y=y) (x0,y0) = (x,y) my_canvas.show()
But this script does not log the position of the mouse as far as I can see. (Or am I wrong?)
Therefore I included after this script a mousetrap-response item. This does the logging, but it only starts after the drawing is done. But I want to log what is drawn.
It doesn't help if I reverse the order (first the mousetrp-response item and then the script for the drawing) because then it just logs the mouse-movements before the drawing which is neither what I want.
I want the movements of the drawing (the drawing itself) be logged.
(At the end I have a logger-item of course.)
Any ideas how I can achieve this?
Thanks a lot!
Pia
Comments
Hi Pia,
You could append the latest coordinates to a list variable each iteration through the loop. So right after the my_mouse.get_pos() command, you place a line with
coordinates_list.append((x,y)). Be sure to create the list variable prior to appending stuff to it.Alternatively you could just make a print-screen when the drawing is done. There's surely a python command for this.
Cheers
Josh
Thanks! Hm, unfortunately this gives an error-message, which I unfortunately don't understand:
File "C:\Program Files (x86)\OpenSesame\lib\site-packages\libopensesame\inline_script.py", line 102, in run self.experiment.python_workspace._exec(self.crun) File "C:\Program Files (x86)\OpenSesame\lib\site-packages\libopensesame\python_workspace.py", line 161, in _exec exec(bytecode, self._globals) File "<string>", line 23, in <module> TypeError: 'instancemethod' object is not iterableHere is what I did:
from openexp.canvas import canvas from openexp.mouse import mouse my_mouse = mouse(exp, buttonlist = ([1]), visible = True) my_canvas = canvas(exp) coordinates_list = list() dot = exp.pool[u'dot3.png'] my_canvas.show() start = clock.time() my_mouse.set_pos(pos=(0, 0)) while clock.time() - start <= 3000: button, position, timestamp = my_mouse.get_click(timeout=10) x,y = position if button is not None else (None,None) if button is not None: (x0, y0) = (None,None) while my_mouse.get_pressed()==(1,0,0): (x, y), timestamp = my_mouse.get_pos coordinates_list.append((x,y)) if (x0,y0) != (None, None): my_canvas.image(dot, x=x0, y=y0) my_canvas.line(x0,y0,x,y, penwidth=8) my_canvas.image(dot, x=x, y=y) else: my_canvas.image(dot, x=x, y=y) (x0,y0) = (x,y) my_canvas.show()So I included
coordinates_list = list()in the beginning and placedcoordinates_list.append((x,y))after(x, y), timestamp = my_mouse.get_pos. Did I place it at the right place? What is my mistake?Thank you!!
Hi Pia,
One mistake is this line:
my_mouse.get_posCan you change it to
my_mouse.get_pos()and see whether it is enough to make the script work?Eduard
Hi eduard,
thanks, the error message disappears, but unfortunately I can't find my variable (
coordinates_list) in the logfile. I placed an logger after the inline-script. And because the variable didn't show up automatically (with "log all variables") I added it manually, but it is still not in the logfile?So, how can I save the contents of this variable in the logfile?
Thanks!
Pia
edit: I used
print(coordinates_list)to print the coordinates_list in the debug window and it works. But how do I get it into the logfile?Hi Pia,
Only variables are logged that have the prefix
var.. So if you changed the variablecoordinates_listintovar.coordinate_list, it will appear in the logfile.Eduard
Hi Pia, changing coordinates_list into exp.coordinates_list might work. The logger automatically stores all variables that are made available to the whole experiment (without .exp the variable can only be called within inline_scripts, but not, for instance, by the logger item).
Your list may turn out huge though. Are you sure that a print-screen will not suffice?
Cheers
Josh
Greetings Ed
Thank you both!
The experiment runs when I change the variable to
var.coordinates_listand also when I change it toexp.coordinates_listbut the list doesn't appear in the logfile, somehow. I also tried to add the variable to the logger, but it complains that this is (both) not a valid variable name...I have to log the coordinates because they are important for the later analysis. The participants have to draw a circle where a dot appeared before.
Any idea what I can do to get the coordinates into the logfile?
Can you quickly upload your experiment? There must a be a little thing wrong somewhere....
Yes, I uploaded it!
Okay, so either change the variable
exp.coordinate_listtovar.coordinate_list, or add the custom variablecoordinate_list(without exp or var) to the logger. Both solutions work for me.Eduard
Thanks a lot! It works!