Re: simple problem

[Jeff Franks <jcf tpg com au>]

Clement Bourdarias wrote:

> Hello,
>
> I'm fighting against elements to get a gtk+-2-based program working.
> I've read some interesting sections in the doc, and I tried to catch a
> mouse button event on a drawing area, created with gtk_drawing_area_new().
>
> This should be very simple.
>
> Well, I used gtk_widget_add_events() with GDK_BUTTON_PRESS_MASK, and set
> up a callback which prints event->x and event->y.
event-x and event->y are doubles, not integers.

> You say: "Cool, but what's your problem then ?"
>
> The problem is that the values are absolutely wrong.
> I _always_ get X=0 and Y=some_huge_value (like 1078951936).
>  
Try this:

gboolean
button_event_callback (GtkWidget *widget, GdkEventButton *event, 
gpointer data)
{
 g_print ("clicked with button %d at (%.0f,%.0f) root: (%.0f,%.0f)\n",
            event->button,event->x, event->y, event->x_root, 
event->y_root);

 return TRUE;
}

Jeff Franks