Re: Widget ref-count on creation

[John Cupitt <jcupitt gmail com>]

Widgets are created with a refcount of 1, but a "floating" flag too.
The first time another widget refs it, it clears the floating flag and
does not change the ref count.

http://developer.gnome.org/doc/API/2.0/gtk/GtkObject.html#gtk-object-sink

The idea is to save the programmer lots of annoying unrefs every time
an object is built and added to a container.

On Wed, 23 Jun 2004 03:23:57 +1000, Russell Shaw <rjshaw netspace net au> wrote:
> Hi,
> In the gtk tutorial:
>    http://www.gtk.org/tutorial/app-codeexamples.html#SEC-TICTACTOE
>
> a composite widget is created with:
>
>    GtkWidget*
>    tictactoe_new ()
>    {
>      return GTK_WIDGET (g_object_new (tictactoe_get_type (), NULL));
>    }
>
> The refcount on this object is 1 i assume.
>
> In main.c, the widget is added to a container:
>
>    gtk_container_add (GTK_CONTAINER (window), ttt);
>
> so i assume this increases the refcount to 2 (couldn't tell
> by looking at gtk source). So, if the containing window is
> destroyed, it will release its refcount. However, the ttt
> widget will still have a refcount of 1 and hang around.
>
> What is the correct way of handling the refcount on widget
> creation?
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