Hi,
My computer system is win10， PsychoPy 1.85.6
In my experiment, I need to use the mouse to draw simple lines on the screen, and I hope to take a screenshot to store the drawn lines. Does anyone know how to take screenshots and store them？
thanks
eliza
Hi,
The Window class has a .getMovieFrame() function:
https://www.psychopy.org/api/visual/window.html#psychopy.visual.Window.getMovieFrame
Call that as you need, then at the end of the experiment, call .saveMovieFrames() to save them to files:
https://www.psychopy.org/api/visual/window.html#psychopy.visual.Window.saveMovieFrames
Thanks for your timely reply. I tried to modify it according to your method, but I got one picture per frame. Therefore, many pictures were generated, which resulted in program stagnation.
This is my code, the function I want to achieve is to draw some simple shapes with the mouse, and then press the button to go to the next screen, how can I just capture the picture after mouse drawing？
Thanks a lot!
# test for mouse draw lines
# t2 = visual.TextStim(win,text=" ",pos=(0,0))
drawlist = []
m = event.Mouse(win=win)
if frameN >= 60:
while True:
trial_image1.draw()
trial_image2.draw()
for item in drawlist:
item.draw()
win.flip()
win.getMovieFrame()
pos = m.getPos().tolist()
if m.getPressed()[0]==1:
# if the mouse is down, determine if JUST pressed, or still pressed
if mousedown == False:
# start a new drawing phase (and change colors)
mousedown = True
drawlist.append(visual.ShapeStim(win,lineWidth=2.0,lineColor='red',closeShape=False))
drawlist[-1].setVertices(pos)
else:
# continue last drawing phase
if len(drawlist[-1].vertices.shape)==1:
# only one vertex thus far (vertices is 1D)
drawlist[-1].setVertices([drawlist[-1].vertices.tolist()]+[pos])
else:
# more than one vertex (vertices is 2D)
drawlist[-1].setVertices(drawlist[-1].vertices.tolist()+[pos])
elif m.getPressed()[0]==0:
# if the mouse is up, reset and wait for new drawing phase
mousedown = False
win.saveMovieFrames('1.png')
if m.getPressed()[2]:
# if right button is pressed, quit early
break
# *trial_resp* updates
if t >= 0.0 and trial_resp.status == NOT_STARTED:
# keep track of start time/frame for later
trial_resp.tStart = t
trial_resp.frameNStart = frameN # exact frame index
trial_resp.status = STARTED
# keyboard checking is just starting
win.callOnFlip(trial_resp.clock.reset) # t=0 on next screen flip
event.clearEvents(eventType='keyboard')
if trial_resp.status == STARTED:
theseKeys = event.getKeys(keyList=['space'])
# check for quit:
if "escape" in theseKeys:
endExpNow = True
if len(theseKeys) > 0: # at least one key was pressed
trial_resp.keys = theseKeys[-1] # just the last key pressed
trial_resp.rt = trial_resp.clock.getTime()
# a response ends the routine
continueRoutine = False
break
# *trial_resp* updates
if frameN >= 60 and trial_resp.status == NOT_STARTED:
# keep track of start time/frame for later
trial_resp.tStart = t
trial_resp.frameNStart = frameN # exact frame index
trial_resp.status = STARTED
# keyboard checking is just starting
win.callOnFlip(trial_resp.clock.reset) # t=0 on next screen flip
event.clearEvents(eventType='keyboard')
if trial_resp.status == STARTED:
theseKeys = event.getKeys(keyList=['space'])
# check for quit:
if "escape" in theseKeys:
endExpNow = True
if len(theseKeys) > 0: # at least one key was pressed
trial_resp.keys = theseKeys[-1] # just the last key pressed
trial_resp.rt = trial_resp.clock.getTime()
# a response ends the routine
continueRoutine = False
Just call both of those functions once, at the end of the trial when the drawing is completed, rather than saving an image on every screen refresh (which will capture the drawing incrementally).
According to your suggestion, add a button response, the problem is solved, thank you very much！