Re: can_change_screen property for GtkWindow
- From: Tim Janik <timj gtk org>
- To: Owen Taylor <otaylor redhat com>
- Cc: Gtk+ Developers <gtk-devel-list gnome org>
- Subject: Re: can_change_screen property for GtkWindow
- Date: Wed, 2 Oct 2002 05:55:46 +0200 (CEST)
On Tue, 1 Oct 2002, Owen Taylor wrote:
>
> [ Continuing the "simple bug turns into thousand line patch" saga... ]
>
> It appears that we need a way to know whether or not it is
> safe for GTK+ to move a widget between screens.
>
> Use cases for this:
>
> A) For drag-and-drop, GTK+ needs to know whether the icon set using
> gtk_drag_set_icon_window() can be used across multiple screens.
>
> B) We eventually want the ability for window managers to migrate
> windows across screens, and for users to migrate applications
> between different displays. GTK+ needs a way to know whether it
> should advertise support for such capabilities.
>
> The attached patch adds the GtkWindow API:
>
> void gtk_window_set_can_change_screen (GtkWindow *window,
> gboolean can_change_screen);
> void gtk_window_unset_can_change_screen (GtkWindow *window);
> gboolean gtk_window_get_can_change_screen (GtkWindow *window);
> void gtk_window_set_default_can_change_screen (gboolean can_change_screen);
> gboolean gtk_window_get_default_can_change_screen (GtkWindow *window);
these API names frighten me, wouldn't screen_changable be better?
>
> And properties "can_change_screen" and "can_change_screen_set".
why would you have to know whether the user set the property at all
(i.e. need can_change_screen_set)? if that's an important scenario
different from "user allowed screen changes" and "user forbid screen
changes", then the cleaner aproach is a tri-state property, i.e.
an enumeration. and btw, i assume that you mean:
gtk_window_set_default_can_change_screen (FALSE);
/* window->can_change_screen_set = FALSE; */
prop1 = gtk_window_get_can_change_screen (window);
gtk_window_set_default_can_change_screen (TRUE);
prop2 = gtk_window_get_can_change_screen (window);
to return different values for prop1 and prop2. still, property
change notification for ::can_change_screen will have to be
queued on window in gtk_window_set_default_can_change_screen (TRUE);
>
> Regards,
> Owen
>
---
ciaoTJ
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