Re: newbie question:about getting an input via button

[Gus Koppel <gtk spamkiller bytechase cx>]

stan huang wrote:

>  Hello, can anyone please help me? I am trying to get
> an user input via the text entry box by clicking on a
> button
> in the application. So once they enter into the text
> entry and press the button, I will then collect the
> data with some callback function. I really don't know
> how to connect the button to the entry so it would
> catch the text entry's "clicked" signal and then call
> the callback function.

The way to do this is to use the function gtk_entry_get_text ()
http://developer.gnome.org/doc/API/2.0/gtk/GtkEntry.html#gtk-entry-get-text
There is no way for an implicit connection, like GTK delivering the
contents of an input field to a button by itself. If you want to process
the contents you have to query them by yourself (in your button callback
function).

To access the input field from your button's callback function you need to
get a pointer to it. You can do this by

- creating / keeping your own global variables of pointers to all
  (important) widgets

- using Glade's lookup_widget () function (only available if GUI is
  created by Glade)

- using a more generic widget localisation function like my
  http://www.spamkiller.bytechase.cx/democode/widget_find_by_name.c

For the latter two you should name your (important) widgets properly.