[gtkada] gtk.text to string

[Siddhartha Ray]

Hi,

text : string:=""; is a constrained string. You cannot assign anything
to it that is more than the length of "". That is why you get the
constraint error.

Therefore if you kind of know what the size of the string you
are expecting from Get_Text, say 80 characters then:

 text : string (1 .. 80) := (others => ascii.nul);
 ...
 text := gtk.text.get_text (texto);

 put (text);

if you do not know what the size of string is then the easiest/dirtiest way
is

  type string_ptr is access all string;
  text : string_ptr := null;

  ...
   
  text := new String'(gtk.text.get_text(texto));

  put(text.all);

should do it.

Or you can look into the Ada.Strings.Unbounded package and do 
something like

 text : ada.strings.unbounded.unbounded_string :=
ada.strings.unbounded.null_unbounded_string;

 ...

 text :=
ada.strings.unbounded.to_unbounded_string(gtk.text.get_text(texto));
 put(ada.strings.unbounded.to_string(text));

These techniques should do it.

-Sid

-----Original Message-----
From: luix [mailto:luix at tropicalstorm.com]
Sent: Thursday, August 16, 2001 3:37 AM
To: gtkada at gtkada.eu.org
Subject: [gtkada] gtk.text to string


I'm trying to pass gtk.text to a text file, the only way I've founded is
passing it to string before putting in the text file, so I tried to use the
get_text function (in gtk-text) and it compiles but I get a constraint
error when running, this is my procedure:

procedure convertir (b: access gtk.button.gtk_button_record'class) is
     text: string:="";
      begin
         cadena:=gtk.text.get_text(texto);
         put(text); --I did this only to know if it runs
end convertir;

I don't know what am I doing wrong, as the delcaration of the function is:
      function Get_Text (Text : access Gtk_Text_Record) return String  is

and I can't find any info about this in the gtkada_rm.
please help!

thanks
Luis.

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