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[solved] Vertical Slider rating scale?

edited July 2015 in OpenSesame

Is there any possible way to invert slider scale to be vertical (analog scale in PsychoPy for example can not be turned to vertical position)? I`m not programmer in any sense so some detailed instructions are greatly appreciated. Thank you!


  • edited 2:34PM


    I don't think you can avoid having to program a bit yourself. However, it is not that hard, and there are many discussions dealing with this topic here in the Forum.

    As a starter, you could have a look on this discussion here :

    It describes rather detailed how to implement a horizontal slider. All you would need to do, is finding and swapping the x and y coordinates accordingly.

    I hope this is what you had in mind?

    Give it a shot, and if you need more help, just ask again.

    Good luck ,


  • edited 2:34PM

    Thank you for your reply. Main idea is to force slider to move upwards while mouse moves upwards, opposite direction accordingly. I`ve tried to change code but have only achieved mouse movement inversion. It looks like slider moves only in x axis. Main goal is y axis increment.

  • edited 2:34PM

    This should do the trick, but you probably need to tweak the code a bit to make it prettier.

    from openexp.canvas import canvas
    from openexp.mouse import mouse
    my_canvas = canvas(self.experiment)
    my_mouse = mouse(self.experiment, timeout=20)
    # Set slider dimensions
    slider_w = 500
    slider_h = 100
    slider_x = self.get("width")/2-slider_w/2
    slider_y = self.get("height")/2-slider_h/2
    while True:
            # Determine the slider fill based on the mouse position
            pos, time = my_mouse.get_pos()
            x, y = pos
            # If you want to re-enter the slider loop, you need a variable that can be True
            # or False. Initialized as being False. Only if mouse on slider, it becomes True
            enter = False
            if not (x < slider_x - slider_w/2) or (x > slider_x + slider_w/2):
                  enter = True
            while enter:
                # Determine the slider fill based on the mouse position
                 pos, time = my_mouse.get_pos()
                 x, y = pos
                 # Break when the mouse leaves the slider area
                 if (x < slider_x - slider_w/2) or (x > slider_x + slider_w/2):
                 slider_fill = min(slider_w, max(0, y-slider_y))
                 # Draw some text (this can be anything)
                 my_canvas.text("Question goes here", y=slider_y-100)   
                 my_canvas.text("Click to accept ...", y=slider_y+100)
                 # Draw the slider frame
                 my_canvas.rect(slider_x, slider_y, slider_h, slider_w)
                 # Draw the slider fill
                 my_canvas.rect(slider_x, slider_y, slider_h, slider_fill, fill=True)               
                 # Draw the mouse cursor 
                 my_canvas.arrow(x+5, y+10, x, y)
            # Poll the mouse for buttonclicks
            button, position, timestamp = my_mouse.get_click(timeout = 20)
            if button != None:
    slider_percent = 100.0*slider_fill/slider_w     
    self.experiment.set("slider_percent", slider_percent)
  • edited 2:34PM

    I would like to thank you so much. With your hints I have achieved more than I expected first. Quite amazing OpenSesame actually is.
    The only problem left to solve is output data. Currently after clicking exported csv file is completely empty. I have not dug deeply into documentation yet.
    Thank you once again!

  • edited 2:34PM

    Nice to hear.

    You probably wanna have a look at the logger item (See here)


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