From: Jean-Pierre Berard <jberard@...>
Date: 2002-09-08T23:52:54+09:00
Subject: Re: ruby entry widget does not display properly

Matt Gushee <mgushee@havenrock.com> wrote in
news:20020906101958.GJ4604@swordfish: 

> On Fri, Sep 06, 2002 at 07:10:18PM +0900, Jean-Pierre Berard wrote:
>> In win2k ruby does not seem to be able to display properly Tk entry
>> widget entered
>> in Unicode. 
>> I know already that ruby script written in utf-8 will display without
>> any difficulties thanks to the command line option rubyw -Ku
>> script.rbw but when one enters Unicode through the global IME in
>> Japanese for example into an Tk entry widget one gets an ugly cursor
>> obstructing most of the display and nothing else except a series of
>> strings ????? 
>> 
>> When the equivalent is done under Tcl/Tk, the Japanese characters are
>> displayed
>> beautifully without any ugly showing up of the cursor! 
>> Any pointer is most welcome since I am new to ruby. 
> 
>> 
>> TkEntry.new { 
>> insertwidth 40 
> 
> This is part of the problem. Instead of 'insertwidth', use 'width',
> just as you would in Tk. The config options almost always have the
> same names in Ruby/Tk as in Tcl/Tk ... it's just the syntax that's
> different. 
> 
>> font 'Times 16 normal' 
> 
> Does your Times font include Japanese characters? I suppose it must,
> since it worked with Tcl/Tk. But if you're not sure, try using a
> different font that you know includes Japanese characters.
> 

It is reassuring to know that the transcription of tk scripts into ruby 
will be just a matter of syntax!
The failing of the Japanese characters to display must to a degree also
be a matter of syntax since ruby can display utf-8 without a further a
do even without invoking the font command.
It is the input, which must need somehow a reset from its default.

The script with the word "Japanese" written in utf-8 displays without
any font support but when one writes in Japanese into the entry widget
one gets only ????

# ruby -Ku script.rb

require "tk"

root = TkRoot.new() { title "Packing Example" }
entry = TkEntry.new(root).pack("side"=>"top", "fill"=>"x")
# entry.insert(0, "Entry on the top")
entry.insert(0, "�-�������")

Tk.mainloop