[solved] Implement a slider with specific ratings

Comments

• eduard

  May 2015 edited 8:53AM

  Hi,

  First of all, you can also have look on this discussion:

  • http://forum.cogsci.nl/index.php?p=/discussion/1415/open-slider-and-touch-screen/p1

  together they should get you enough information to get started.

  In order to have values along the scale you have to add folllowing features:

  • divide the length of the scale into equal-sized parts, which serve as coordinates to draw your markers on

  • assuming that in those discussions mentioned, mouse position and corresponding values are being recorded, you only have to create a piece of code that dynamically draws the value at a position above that scale that is fixed in the vertical dimension (y is constant), but variable in the horizontal one (x is changing).

  The code could look like this:

  
  # first problem
  
  # coordinates of the entire scale
  x1 = 100
  y1 = 600
  x2 = 900
  y2 = 600
  
  no_markers = 5
  
  dist_between_markers = (x2-x1)/ float(no_markers)
  marker_pos = []
  # adding all values to a list
  for i in range(no_markers):
      marker_pos.append(x1+i*dist_between_markers,y1)
      canvas.text("Value you want to present",x = x1+i*dist_between_markers,y = y1)
  
  # second problem
  # check earlier discussions for the code that implements the main part of 
  # updating the current value of the scale
  
  # Let the current position be [x,y] and the current value: value = <some_value>
  
  # very simple
  
  canvas.text(str(current_value),x= x, y= y)
  
  # the important thing is that this piece of code is placed within a while loop, 
  # so that it is  updated on every iteration
  
  

  I hope this helps. Let me know if you need more pointers.

  Good luck,

  Eduard

  
• hollana28

  May 2015 edited 8:53AM

  Hi Eduard,
  Thanks a lot! It works great now