From: Hidetoshi NAGAI <nagai@...>
Date: 2004-08-18T13:41:07+09:00
Subject: Re: Tk event_generate broken?

Hi, 

From: "Phlip" <phlip_cpp@yahoo.com>
Subject: Tk event_generate broken?
Date: Wed, 18 Aug 2004 01:55:57 +0900
Message-ID: <8LqUc.2657$ZC7.26@newssvr19.news.prodigy.com>
>         poly1 = TkcPolygon.new(canvas, shape) {
>             fill 'green'
>              }
> 
>         poly1.bind ('Button-1') {
>             puts 'yo'
>             poly1.configure('fill' => 'red')
>             Tk.event_generate(poly1, 'Button-1')      # <-- yo
>             }
>         Tk.update
>         Tk.event_generate(poly1, 'Button-1')

Unfortunately, if you want to generate events for canvas items, 
you must give the coordinate information of the event. 
(e.g. Tk.event_generate(poly1, 'Button-1', :x=>36, :y=>36) )
When the target of Tk.event_generate method is a canvas item, 
the generated event is sent to the canvas widget which includes 
the target item, because Tcl/Tk's event command can't send events 
to canvas items directly. It depends on the coordinate of the event 
whether the canvas calls the callback procedure of the target item 
or not. 
-- 
                                  Hidetoshi NAGAI (nagai@ai.kyutech.ac.jp)