Re: [gtk-list] gtk_window_position only works when window hidden ?

[Tim Janik <timj gtk org>]

On Sun, 12 Jul 1998, Georg Greve wrote:

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> 
> Hi !
> 
> I have a notice dialog that is considered extremely important where
> data can be added over time, so it should always go where the mouse
> pointer is whenever anything interesting happens.
> 
> 	gtk_window_position(GTK_WINDOW(notice_dialog), GTK_WIN_POS_MOUSE);
> 
> does the trick when the window is hidden, but what do I have to do to
> move the mapped and drawn window ? I don't want to hide/show the
> window every time because I guess that could be extremely annoying...

the GtkWindow::win_pos value is only taken care of in the process of
showing the window.
for the purpose of window-followes-mouse (though, i guess i could find that
behaviour annoying) you either need to hide+show the window each time, or
adjust it's position manually:

        /* get current window size */
	width = GTK_WIDGET (window)->requisition.width;
        height = GTK_WIDGET (window)->requisition.height;
	/* get pointer position */
        gdk_window_get_pointer (NULL, &x, &y, NULL);
        /* adjust window to contain pointer in the middle */
        x = width / 2;
        y = height / 2;
        /* check x and y screen bounds */
        screen_width = gdk_screen_width ();
        screen_height = gdk_screen_height ();
        if (x < 0) x = 0;
        else if (x > (screen_width - width))
          x = screen_width - width;
        if (y < 0) y = 0;
        else if (y > (screen_height - height))
          y = screen_height - height;
        /* adjust the GtkWindow's gdk window */
        gdk_window_move (widget->window, x, y);

if you want your window to save this position for subsequent
show operations, you need to call

gtk_window_position(window, GTK_WIN_POS_NONE);
gtk_widget_set_uposition (GTK:WIDGET (window), x, y);

as well.
(the above code is an adjustment of the GTK_WIN_POS_MOUSE code from
gtkwindow.c to your needs. of course i haven't actually tried it out
or compiled it ;)

> 
> Later,
> 	Georg
> 

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ciaoTJ