Setting mouseclick durations inline script

Comments

• sebastiaan

  June 2023

  Hi @sdewitt ,

  Your script opens a PDF file in a browser window, which is separate application. At that point, you're no simply longer in OpenSesame--you've left the experiment and need to switch back to it in order to continue.

  If you want to have a scrollable image, then there are various ways to do so within OpenSesame. One way is to use a short inline_script that modifies the y coordinate of an image element, a file called image.png taken from the file pool, on a Canvas based on mouse input, like so:

  my_canvas = Canvas()
  my_canvas['img'] = Image(pool['image.png'])
  my_mouse = Mouse()
  while True:
    my_canvas.show()
    button, pos, timestamp = my_mouse.get_click()
    # Break loop on left click
    if button == 1:
      break
    # Scroll up
    if button == 4:
      my_canvas['img'].y -= 10
    # Scroll down
    elif button == 5:
      my_canvas['img'].y += 10
  

  You will probably need to modify this script a bit, but hopefully it will get you started!

  -- Sebastiaan

  
  
  Check out SigmundAI.eu for our OpenSesame AI assistant!
  
• sdewitt

  June 2023 edited June 2023

  Hi @sebastiaan

  
  

  Thank you so much for your quick response! I suspected my code was navigating outside of opensesame, based on how the image was being presented. Editing and using the script you have above, I'm still having a few issues. See my code after the description of my issue and my error message.

  
  

  Namely, it seems my opensesame backend does not have the canvas, image, or pool modules (the backend right now is expyriment, I don't actually know how to change that to something like psychopy). As such, I start the script out by importing multiple modules (which I think is not ideal). Even If I just do this in the prepare, not run (or if I do it in both), I get the subsequent error message on line 4 (note: 1. if I don't import the modules, the script breaks on each line the modules are called. 2. my_canvas = canvas() breaks without an input for canvas(), hence why I have canvas(exp), I'm not sure if this is accurate.

  phase: prepare

  item: ___inline_script

  line: 4

  exception message: name 'pool' is not defined

  exception type: NameError

  
  

  from openexp.canvas import canvas

  from PIL import Image

  my_canvas = canvas(exp)

  my_canvas['img'] = Image(pool['image.png'])

  my_mouse = Mouse()

  while True:

   my_canvas.show()

   button, pos, timestamp = my_mouse.get_click()

   # Break loop on left click

   if button == 1:

  break

   # Scroll up

   if button == 4:

  my_canvas['img'].y -= 10

   # Scroll down

   elif button == 5:

  my_canvas['img'].y += 10
• sdewitt

  June 2023

  Hi @sebastiaan,

  
  

  I was actually able to work through the errors in the comment I made above (it wouldn't let me edit the unnecessary comment). I had to use a work around with exp to get the image from my file pool, but I've successfully done so (see below), and it responds to the break with a mouse response (1, left button click). The struggle I now have is,

  1. since the way I pulled the file into my canvas is different than how you did, I can't figure out the correct syntax if/elif for button ==4/5 part of the code. since my code doesn't have a my_canvas['img'] to append .y to. I've tried appending .y to what I replaced my_canvas['img'] with, but it doesn't seem to work.
  2. I would like to have a visible mouse cursor when I pull up the image. I know there is a Mouse.show_cursor(show=True) function, but I don't think i'm assigning it correctly. Entering that exact line of code into my script on its own does not seem to work.

  from openexp.canvas import canvas

  from PIL import Image

  from openexp.mouse import mouse

  my_canvas = canvas(exp)

  my_canvas.image(exp.get_file('gaze_left.png'))

  my_mouse = mouse(exp)

  while True:

   my_canvas.show()

   button, pos, timestamp = my_mouse.get_click()

   # Break loop on left click

   if button == 1:

  break

   # Scroll up

   if button == 4:

  my_canvas.y -= 10

   # Scroll down

   elif button == 5:

  my_canvas.y += 10

  
  

  
  

  Thank you for any help!

  
  

  Best,

  Sam
• eduard

  June 2023

  Hi Sam,

  1

  Replace my_canvas.image(exp.get_file('gaze_left.png')) with

  my_canvas['img'] = Image(exp.get_file('gaze_left.png'))

  That should do the trick. If not, rather than doing my_canvas.y+=10 you have to draw the image to the canvas every time you want to update the position new (with adjusted x and y coordinates)

  2

  Have you seen that part of the documentation:

  Note: In most cases, you will want to use the visible keyword, which changes the visibility during response collection, that is, while mouse.get_click() is called. Calling show_cursor() will not implicitly change the value of visible, which can lead to the somewhat unintuitive behavior that the cursor is hidden as soon as get_click() is called.

  So button,pos,timestamp=my_mouse.get_click(visible=True) should do the trick.

  Eduard

  
• sdewitt

  June 2023

  Thank you so much Eduard! (bought you a coffee). That solved my second issue, the mouse problem. For my first issue, When I replaced my code: my_canvas.image(exp.get_file('gaze_left.png')) with what you suggest: my_canvas['img'] = Image(exp.get_file('gaze_left.png')) I get the following error

  
  

  phase: prepare

  item: inline_script

  line: 9

  exception message: 'module' object is not callable

  exception type: TypeError

  
  

  I worry that I cannot redraw the image with new x,y coordinates every time I need it to shift, as I need it to shift in response to the mouse scroll response. I'm not sure I know how to redraw the image with new coordinates in response to a mouse scroll response.

  
  

  Thank you again!

  
  

  Best,

  Sam
• sdewitt

  June 2023

  Hi @eduard ,

  Nevermind! I was able to use your suggestion to draw lower/higher version of the image, combined with a "run if" condition based on a scrolling response. EXTREMELY helpful, thank you and @sebastiaan so much!
• eduard

  July 2023

  HI Sam,

  Thanks! Glad it worked out :)

  Eduard