Re: Reshowing Icons in a Grid

[Andrew Potter <agpotter gmail com>]

On Fri, Mar 14, 2014 at 4:53 PM, Marshall Lake <mlake mlake net> wrote:
> I have 10 different icons stored in 10 files.  I want to display these 10
> icons in different locations in a gtk_grid_new().
>
> It works fine once.
>
> If I gtk_widget_destroy(grid), create a new grid, and try to display these
> 10 icons a second time (some in different grid locations and some not) I get
>
> gtk_grid_attach: assertion `gtk_widget_get_parent (child) == NULL' failed
>
> and several
>
> gtk_grid_attach: assertion `GTK_IS_WIDGET (child)' failed
>
> However, if I re-load the icons from their files after
> gtk_widget_destroy(grid) it works fine the second time.

Most widgets are "floating" on creation. Then when you add them to a
container they get sinked. When you destroy the grid, it unrefs all
its children before it is destroyed. If that is the only reference
your icons, they are destroyed as well.

You can g_object_sink_ref(your_icon) after you create them the first
time, then you should be able to add them to new containers after they
are destroyed.