Re: text entry validation

[Matí­as Alejandro Torres <torresmat gmail com>]

> void
> on_bt_validate_clicked                 (GtkButton       *button,* gpointer         user_data*)  
> {
>         *GtkWidget *entry;*
>         [.....]
> }
>
> there is no error but nothing is displayed and the application is
> closed...please help
>
> thanks
>
>
>   
Well, the code i sent you to my surprise, did things right the first 
time I tried it.
The error with your code, is that you don't understand the way signals 
are connected:

When you connect a signal you use the g_signal_connect function that 
connects a GCallback 
<http://developer.gnome.org/doc/API/2.0/gobject/gobject-Closures.html#GCallback> 
function to a signal for a particular object.
From the code i attach with this email:

g_signal_connect (G_OBJECT (button), "clicked", (GCallback) 
entry_validation, *entry);*

*button:* the putton that will emit emit the signal.
*"clicked":* the signal
*entry_validation:* the function that will respond to the signal
*entry:* here you can pass data that the entry_validation function will 
receive, it is not necesary (you can specify NULL). Here we use so the 
entry_validation function knows the entry where the text is.

What you did wrong was create a new entry in the callback function that 
knows nothing about the other entry where you wrote the text.

Look at the file I attached, it works just fine, at least in my linux. 
If you're in linux you can compile it with:

gcc `pkg-config --cflags gtk+-2.0` -o entryvalidation entryvalidation.c 
`pkg-config --libs gtk+-2.0`


Please read this: GTK+-2.0 Tutorial <http://gtk.org/tutorial/>. It shows 
how to connect and handle signals. Respond to the list so the messages 
related to this thread are not interrupted.

Matias