Re: How to get Widgets absolute X/Y co-ordinates.

[Tim Evans <t evans aranz com>]

Olexiy Avramchenko wrote:
[snip]
> Absolute screen coordinates is much harder. Here's what we have:
> 1) Widget's real size and position inside the *parent window* stored
> in GtkWidget::allocation field.
> 2) gtk_widget_get_parent_window() function can give us a pointer to
> the parent window. 
> 3) Parent window coordinates in *root window* (screen coordinates) 
> accessible via gdk_window_get_root_origin().
> Looks simple ? Yep, but there's a window manager application that runs 
> somewhere on your box and decorates your windows with nice titlebars and 
> frames. Your widgets will be packed in decorated window with some 
> offset, known by window manager.
> So also we have:
> 4) gdk_window_get_frame_extents() function can talk to window manager 
> and ask it about decorated window coordinates.

The function gdk_window_get_origin() gives you the root window 
coordinates without the window manager frame.  This simplifies things 
somewhat.

--
Tim Evans
Applied Research Associates NZ
http://www.aranz.com/