Re: How to add new Signals in a class

[vasista sarma <svasista novell com>]

On Fri, 2004-10-29 at 12:45 +0100, Tim Müller wrote:
> On Friday 29 October 2004 12:30, vasista sarma wrote:
>
> Hi,
>
> > ok let me explain the exact situation i am in i have a GtkButtonClass
> > which i have used for "clicked" and "pressed" events .
> > The code would look something like this
> >
> > GtkButtonClass * button_class= (GtkButtonClass *)kclass;
> > button_class->clicked = button_clicked;
> > button_class->pressed = button_pressed;
> >  (snip)
> > These two functions are getting invoked for button pressed and Click
> > events. Now i want to write something for drag motion as well
> > something like (this i want when other application is hovered over
> > button).
> >
> > button_class->drag_motion= button_drag_motion;
> >
> > How can i achieve this. Please give an example on how to do this
>
> Just out of curiosity ... why are you trying to derive a new class from 
> GtkButtonClass, instead of just connecting to the relevant signals? 
>
> e.g.:
>
> static void
> on_button_clicked (GtkWidget *button, gpointer data)
> {
>   g_print ("click\n");
> }
>
> ...
>
>   GtkWidget *button = gtk_button_new_with_label ("clickme");
>   
>   g_signal_connect (button, "clicked", G_CALLBACK (on_button_clicked), NULL);
I wish i could connect signals this way but i am given a code that uses
GtkButtonClass instead of GtkButton (my life would have been much
simpler). I cannot change the declaration now again since it breaks much
of the code there and a lot of reworking needs to be done there, So i am
caught b/w devil and the deep blue sea. u suggest blue sea is
better :)) 
Cheers,
vasista
> ....
>
> Cheers 
>  -Tim