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st-widget: Keep track of first/last children

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Clutter now provides two new properties on ClutterActor - first-child
and last-child, so we have notifiers on when they change. Unfortunately,
it still doesn't help us too much - we need to keep track of the previous
values of the properties so we can remove their pseudoclasses.

https://bugzilla.gnome.org/show_bug.cgi?id=670034
This commit is contained in:
Jasper St. Pierre 2012-02-13 20:06:45 -05:00
parent 3736d81d8f
commit a9f728d2a7
1 changed files with 62 additions and 0 deletions
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62
src/st/st-widget.c
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@ -70,6 +70,12 @@ struct _StWidgetPrivate
AtkObject *accessible;
ClutterActor *label_actor;
/* Even though Clutter has first_child/last_child properties,
* we need to keep track of the old first/last children so
* that we can remove the pseudo classes on them. */
StWidget *prev_last_child;
StWidget *prev_first_child;
};
/**
@ -275,6 +281,9 @@ st_widget_dispose (GObject *gobject)
priv->label_actor = NULL;
}
g_clear_object (&priv->prev_first_child);
g_clear_object (&priv->prev_last_child);
G_OBJECT_CLASS (st_widget_parent_class)->dispose (gobject);
}
@ -1282,6 +1291,56 @@ st_widget_name_notify (StWidget *widget,
st_widget_style_changed (widget);
}
static void
st_widget_first_child_notify (StWidget *widget,
GParamSpec *pspec,
gpointer data)
{
ClutterActor *first_child;
if (widget->priv->prev_first_child != NULL)
{
st_widget_remove_style_pseudo_class (widget->priv->prev_first_child, "first-child");
g_clear_object (&widget->priv->prev_first_child);
}
first_child = clutter_actor_get_first_child (CLUTTER_ACTOR (widget));
if (first_child == NULL)
return;
if (ST_IS_WIDGET (first_child))
{
st_widget_add_style_pseudo_class (ST_WIDGET (first_child), "first-child");
widget->priv->prev_first_child = g_object_ref (ST_WIDGET (first_child));
}
}
static void
st_widget_last_child_notify (StWidget *widget,
GParamSpec *pspec,
gpointer data)
{
ClutterActor *last_child;
if (widget->priv->prev_last_child != NULL)
{
st_widget_remove_style_pseudo_class (widget->priv->prev_last_child, "last-child");
g_clear_object (&widget->priv->prev_last_child);
}
last_child = clutter_actor_get_last_child (CLUTTER_ACTOR (widget));
if (last_child == NULL)
return;
if (ST_IS_WIDGET (last_child))
{
st_widget_add_style_pseudo_class (ST_WIDGET (last_child), "last-child");
widget->priv->prev_last_child = g_object_ref (ST_WIDGET (last_child));
}
}
static void
st_widget_init (StWidget *actor)
{
@ -1293,6 +1352,9 @@ st_widget_init (StWidget *actor)
/* connect style changed */
g_signal_connect (actor, "notify::name", G_CALLBACK (st_widget_name_notify), NULL);
g_signal_connect (actor, "notify::first-child", G_CALLBACK (st_widget_first_child_notify), NULL);
g_signal_connect (actor, "notify::last-child", G_CALLBACK (st_widget_last_child_notify), NULL);
}
static void