Fw: GtkTextBuffer, insert_text

["Rich Gautier" <rgautier cox net>]

 Well, once you have it in your function, you need to recast it to get the
 property out of the widget.

 You're only passing in a memory address, after all, and by casting it into
a
 basic widget/object, you're not going to have the extended properties
 available....  I don't know what the property of buffer is for it to get at
the
 actual text?  perhaps buffer->text?

 The cast you want is something like G_TEXT_BUFFER(buffer), perhaps?  You'll
have to consult someone who is more  familiar with GTK on that,  all I can
offer is my suggestion - question is -  did you still get the runtime
invalid cast error?

> ----- Original Message -----
> From: "Mohammed Sameer" <uniball gmx net>
> To: <gtk-app-devel-list gnome org>
> Sent: Thursday, July 18, 2002 10:54 PM
> Subject: Re: GtkTextBuffer, insert_text
>
>
> Thanks for the reply
> still didn't work?
> i wonder what's the problem!!!!
>
> On Fri, 2002-07-19 at 04:21, Rich Gautier wrote:
>     ï
>     I think your callback function needs to have GtkWidget *widget as
>     the first passed parameter.
>
>     such as:
>
>     void text_insert_cb(GtkWidget *buffer, ..., gpointer user_data)
>
>     because the callback function is going to cast it as a basic widget
>     when it makes the call.  You may be able to recast it once it's in
>     your callback function, but it's not passed as GtkTextBuffer type..
>
>     Rich G
>         ----- Original Message -----
>         From: Mohammed Sameer
>         To: gtk-app-devel-list gnome org
>         Sent: Thursday, July 18, 2002 7:28 PM
>         Subject: GtkTextBuffer, insert_text
>
>         Hi all
>         i have a small problem
>
>         i have a textbuffer
>
>           contents = gtk_text_view_new ();
>           buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (contents));
>                 /* Implementing undo/redo... */
>         insert = g_signal_connect (GTK_OBJECT (buffer), "insert_text",
>                                 GTK_SIGNAL_FUNC (text_insert_cb), NULL);
>
>         and the callback
>         void text_insert_cb(GtkTextBuffer *buffer,
>                                                     GtkTextIter pos,
>                                                     const gchar *text,
>                                                     gint length,
>                                                     gpointer user_data)
>         {
>         fprintf(stderr,"%s", text);
>         }
>
>         but it prints some garbage
>         and when i run the program i get:
>         GLib-GObject-WARNING **: invalid cast from `GtkTextBuffer' to
>         `GtkObject'
>
>         what's the problem here ?
>         can anyone point me ??
>
>         Thanks a million
>
>         --
>         ----------------
>         -- Uniball @ DALnet
>         Linux registered user # 224950
>         ICQ # 58475622
>         With Great Power, Comes Great Responsibilities.
> --
> ----------------
> -- Uniball @ DALnet
> Linux registered user # 224950
> ICQ # 58475622
> With Great Power, Comes Great Responsibilities.
>
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