Hello, all.

I'm trying to get the current position and size of a GTK2 gtkwindow using the following:

===
function configure_event(widget: PGtkWidget; event : PGdkEvent; data  :
gpointer):gboolean;cdecl;
var
  grect :PGdkRectangle;
begin
  gdk_window_get_frame_extents(GDK_WINDOW(widget^.window),@grect);
  configure_event := True;
end;
===

The signal is attached to the window via:

===
g_signal_connect (G_OBJECT (window), 'configure_event',

                              G_CALLBACK (@configure_event), NULL);

===

Executing the program results in:

An unhandled exception occurred at $0000004B :
EAccessViolation : Access violation
$0000004B

FPC version is:
Free Pascal Compiler version 2.0.4 [2007/02/02] for i386

OS is: Kubuntu 7.04

Any thoughts on why this is causing the AV?

Thanks!

AIR.

I don't have access to FPC right now, but it seems as if PGdkRectangle is a pointer type already, not a record type?

-Flávio

I don't have access to FPC right now, but it seems as if PGdkRectangle is a pointer type already, not a record type? -Flávio

Thanks for that. If I replace the PGtkRectangle with a TRect, or a simple home-grown Rect record type, it works fine.

So now my question is, how would I use the pointer to GtkRectangle in the function? Sorry for asking such a basic question, but I'm reacquainting myself with Pascal.

Thanks again!

AIR.

fpc header for the gdk function is

	procedure gdk_window_get_frame_extents(window:PGdkWindow; rect:PGdkRectangle);

so, having grect: pGDKRectangle declared, you should use it rather by

	gdk_window_get_frame_extents(GDK_WINDOW(widget^.window),grect);

With regards,

Jan Je/lowicki
----------------------------------------------------------------- Department of Mathematics Katedra Matematyki University of Life Sciences Uniwersytet Przyrodniczy Wroc/law, POLAND
-----------------------------------------------------------------

Yes and no. The correct fix is to declare grect as GdkRectagle, as you need to pass to the function the pointer to an allocated record.

-Flávio

Surely you're right.

Jan Je/lowicki
----------------------------------------------------------------- Department of Mathematics Katedra Matematyki University of Life Sciences Uniwersytet Przyrodniczy Wroc/law, POLAND
-----------------------------------------------------------------

Thanks, everyone.

I got it working by using:

grect : TGdkRectangle;
gdk_window_get_frame_extents(GDK_WINDOW(widget^.window),@grect);

AIR.