[wxpython-users] any tips on doing an on-screen keyboard?

[Stef Mientki]

I don't know if you already solved the problem,
but for a win-mobile emulator I needed something similar,
so here is the solution I used.

I made capture of the keyboard from the M$ Device Emulator and put it in 
a png-file.
I catch the left key down event on the image,
calculate the position of the click in the image,
and send the result to windows with sendkeys.
Works like a charm (but probably only under windows.
Code is below (not all special keys are in there yet).

cheers,
Stef


  def _On_KB ( self, event ) :
    x,y = event.GetPosition ()
    if ( x < 19 ) and ( y < 19 ) :
      self.kb1.Show ( not ( self.kb1.IsShown () ) )
      self.kb2.Show ( not ( self.kb2.IsShown () ) )
    else :
      import SendKeys
      x0 = ( 19, 25, 30, 34, 22 )
      kar = ( ( '\x001234567890-=\0xx\0xx' ),
              ( '\tqwertyuiop[]]' ),
              ( '\x00asdfghjkl;\'\r\r' ),
              ( '\x00zxcvbnm,./\r\r\r' ),
              ( '\x00@`\\     \x00\x00\x00\x00\x00'))

      # determine the row and col index
      x, y = event.GetPosition ()
      row = y / 16
      xfirst = x0 [ row ]

      # top row has a little bit smaller keys
      if row == 0 :
        col = 1 + ( x - xfirst ) / 17
      else :
        col = 1 + ( x - xfirst ) / 18
      col = max ( 0, col )
      key = kar[row][col]
      #print event.GetPosition () ,row,col,str(ord(key))

      # if key = 0, we need to determine a special key
      if ord ( key )  == 0 :
        if row == 4 :
          if col == 11 : key = '{LEFT}'
         
      # now send the key to windows
      SendKeys.SendKeys ( key ,
                          with_spaces = True,
                          with_tabs   = True )