From: Phlip <phlip_cpp@...>
Date: 2004-08-15T10:46:05+09:00
Subject: Fake Tk events

Rubies:

I posted a fix for this a while ago, and then tk.rb upgraded.

The quest is to build a fake event and send it into a bound event handler.

This code creates a canvas, writes "hello world" on it, and fakes a
'Button-1' click on that text:

 require 'tk'
 top = TkRoot.new()
 canvas = TkCanvas.new(top) {width(400);height(300) }
 canvas.grid()
 tx = TkcText.new(canvas, 100, 200) { text 'hello world' }

 tx.bind('Button-1') { |e|
  p e.x
  p e.y
  }

 entry = tx.bindinfo('Button-1')[0][0]

  entry.call( 21, "??", 1, 0, "??", true, 0, "i", 1, "NotifyNormal",
                false, "PlaceOnTop", 0, 7595922, 0, 115, 200, "??", 269,
                1, false, "??", 1, "0x0", "0x0", 4, nil, 269, 376 )

  Tk.mainloop()

It faults, emitting this error message:

c:/ruby/lib/ruby/1.8/tk/event.rb:167:in `num_or_str': wrong argument type
Fixnum (expected String) (TypeError)
 from c:/ruby/lib/ruby/1.8/tk/event.rb:167:in `call'
 from c:/ruby/lib/ruby/1.8/tk/event.rb:167:in `scan_args'
 from c:/ruby/lib/ruby/1.8/tk/event.rb:167:in `install_bind_for_event_class'
 from c:/ruby/lib/ruby/1.8/tk/event.rb:163:in `call'
 from c:/ruby/lib/ruby/1.8/tk.rb:1039:in `eval_cmd'
 from c:/ruby/lib/ruby/1.8/tk.rb:1039:in `cb_eval'
 from c:/ruby/lib/ruby/1.8/tk.rb:990:in `call'
 from yo.rb:16

That error message does not describe which argument is amiss, or if there
are too many or too few. I have painstakingly matched the arguments to
KEY_TBL in event.rb.

How do I diagnose such error messages? And how do I fake events

-- 
  Phlip
  http://industrialxp.org/community/bin/view/Main/TestFirstUserInterfaces