[open] Swiping left/right on an Android tablet

Comments

• Josh

  May 2015 edited 6:51AM

  Hi Charlotte,

  That depends on what your current code looks like of course! I'm expecting that you have at least two fixed pairs of coordinates in your code (top and bottom), and that you keep track of the finger position to process whether- and what kind of swipe is being made?

  The easiest logic, then, would be to just change the two pairs of coordinates from something that represents top and bottom, to something that represents left and right. But again it depends on how your previous experiment was designed; but I can't imagine it would be more complex than changing something that keeps track of an y-coordinate into something that keeps track of an x-coordinate. Since you're the expert of your own code, you probably know which bit of code I'm talking about

  Good luck!

  Josh
• CharWes

  May 2015 edited May 2015

  Hi Josh,

  Thanks for your advice, it's worked perfectly!

  My other question is, I would like to customise the canvas that I'm using (i.e. have it display a certain graphic/colour) instead of it being plain white. Is there any way for me to do this?

  My code looks like this:

  from openexp.mouse import mouse
  from openexp.canvas import canvas
  my_mouse = mouse(exp)
  my_canvas = canvas(exp)
  path = exp.get_file(u'Child_M_1.png')
  left = exp.get("width") - 200
  right = 200
  my_canvas.image(path)
  trialstart = my_canvas.show()
  button, position, movstart = my_mouse.get_click(timeout=None)
  exp.set ("position_Child_M_1", position)
  while True:
      pos, time = my_mouse.get_pos()
      my_canvas.clear()
      my_canvas.image(path, x=pos[0], y=pos[1])
      timestamp = my_canvas.show()
      if pos[0] < right:
          response = "left"
          break
      if pos[0] < right:
          response = "left"
          break
      if pos[0] > left:
          response = "right"
          break
      # calculate the movement time
      movtime = timestamp - movstart
      # calculate the RT
      resptime = movstart - trialstart
  exp.set("response_Child_M_1", response) 
  exp.set("movetime_Child_M_1", movtime)
  exp.set("reponse_time_Child_M_1", resptime)
  

  Thanks!
• eduard

  May 2015 edited 6:51AM

  Hi,

  If it's only a color you can use canvas.set_bgcolor(color) (see doc) within you script. Maybe it is even an option for you to set it in the general experiment settings. To do so, click on the very first element in the overview area and choose there the color you prefer.

  If it is about an image as background, you can do the same trick as you do right now for presenting the stimuli. Only difference will be that you present the background image first and stretched over the entire screen. Later, if you draw your stimuli, the will just put on top of what has been drawn earlier.

  Is this what you meant?

  Eduard