From: Chris Alfeld <chris.alfeld@...>
Date: 2006-04-14T05:34:49+09:00
Subject: ruby/tk HTML_Widget and href's

Consider the following goal:
  * Parse the html "<a href=foo>click me</a>" and display.
  * Detect user clicks convert to href.

The following code does *not* work:

----
require 'tk'
require 'tkextlib/tkHTML'

def do_click(s)
  puts s + "\n"
end

html = Tk::HTML_Widget.new(TkRoot.new,'hyperlinkcommand'=>proc {|s|
do_click(s)})
html.parse("<a href=foo>click me</a>")
html.pack

Tk.mainloop
----

The following code does work but is rather inelgant (note the Tk.bind):

----
require 'tk'
require 'tkextlib/tkHTML'

def do_click(x,y)
  href = $HTML.href(x,y)[0]
  print href + "\n" if href
end

$HTML = Tk::HTML_Widget.new(TkRoot.new)
Tk.bind($HTML.path + ".x",'1',proc {|x,y| do_click(x,y)},"%x %y")
$HTML.parse("<a href=foo>click me</a>")
$HTML.pack

Tk.mainloop
----

Does anyone know what the 'hyperlinkcommand' property of HTML_Widget
does?  Anyone have other ways to make clicking on hyperlinks work?

BTW, HTML_Widget corresponds (at least on my system) to tkHTML 2.0.

c.