Re: Where is the input callback method in glade?

 
The infinite loop is easily avoided by setting a flag while modifying the text withing the handler, and testing the flag at the beginning of the handler (not exactly a beautiful solution, but I'm sure it works). This way your intented functionality can be implemented with GtkEntry.

I have no experience with GtkTextView though. It's not a GtkEditable, hence the details of how to implement this will be different.

Regards

Peter Rottengatter

-----Original Message-----
From: Ferdinand Ramirez [mailto:[email protected]] 
Sent: 06 October 2011 08:18
To: Rottengatter, Peter; [email protected]
Subject: RE: [Glade-users] Where is the input callback method in glade?

Thanks. I tried something similar with GtkTextBuffer and it worked, but I cannot modify the text, only block it or let it through. If I modify it, and insert the modified text into the buffer from within the callback, I end up in an infinite loop.

Is there another way you know, using GtkTextView perhaps?

Thanks,
-Ferdinand

--- On Wed, 10/5/11, Rottengatter, Peter <[email protected]> wrote:

> From: Rottengatter, Peter <[email protected]>
> Subject: RE: [Glade-users] Where is the input callback method in glade?
> To: "Ferdinand Ramirez" <[email protected]>, "[email protected]" <[email protected]>
> Date: Wednesday, October 5, 2011, 12:46 AM
> 
> Read
> http://developer.gnome.org/gtk/stable/GtkEditable.html#GtkEditable-insert-text
> 
> 
> I use the following code to restrict input to numerical
> characters (so that the user can only enter positive integer
> numbers):
> 
> ...
> GtkEntry  *entry = gtk_entry_new();
> gtk_signal_connect (G_OBJECT (entry), "insert-text",
> G_CALLBACK (entry_insert), NULL);
> ...
> 
> void entry_insert (GtkEditable *entry, char *new, gint len,
> gpointer position, gpointer data)
> {
>   gboolean  faulty = FALSE;
>   for (int i = 0; i < len; i++)
>   {
>     if (! isdigit (new[i]))
>       faulty = TRUE;
>   }
>   if (faulty)
>   {
>     g_signal_stop_emission_by_name ((gpointer)
> entry, "insert-text");
>   }
> }
> 
> 
> Regards
> 
> Peter Rottengatter
> 
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]]
> On Behalf Of Ferdinand Ramirez
> Sent: 04 October 2011 13:55
> To: [email protected]
> Subject: [Glade-users] Where is the input callback method
> in glade?
> 
> Where is the callback to keyboard input in glade. I want
> this so that I can respond to each letter that is input.
> 
> As as example, I was looking at the tutorial at http://www.micahcarrick.com/files/gtk-glade-tutorial/C/main.c
> and was wondering how the callback method for keyboard
> inputs can be enabled and how I could modify it.
> 
> For simplicity, let us say that I want to be able to print
> out the characters on the terminal as I input them in the
> above program. I then want to update the buffer instead of
> letting some hidden function in glade do it for me. How do I
> achieve this?
> 
> I'm just using the above example since it is simple and
> neatly written.
> 
> Thanks,
> -Ferdinand
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