/* This function is the default implementation for the notify_gtk
* vfunc which gets called when a property changes value on the
* GtkWidget associated with a GtkWidgetAccessible. It constructs
* an AtkPropertyValues structure and emits a "property_changed"
* signal which causes the user specified AtkPropertyChangeHandler
* to be called.
*/
static void
gtk_widget_accessible_notify_gtk (GObject *obj,
GParamSpec *pspec)
{
GtkWidget* widget = GTK_WIDGET (obj);
AtkObject* atk_obj = gtk_widget_get_accessible (widget);
AtkState state;
gboolean value;
if (g_strcmp0 (pspec->name, "has-focus") == 0)
/*
* We use focus-in-event and focus-out-event signals to catch
* focus changes so we ignore this.
*/
return;
else if (g_strcmp0 (pspec->name, "tooltip-text") == 0)
{
gtk_widget_accessible_update_tooltip (GTK_WIDGET_ACCESSIBLE (atk_obj),
widget);
return;
}
else if (g_strcmp0 (pspec->name, "visible") == 0)
{
state = ATK_STATE_VISIBLE;
value = gtk_widget_get_visible (widget);
}
else if (g_strcmp0 (pspec->name, "sensitive") == 0)
{
state = ATK_STATE_SENSITIVE;
value = gtk_widget_get_sensitive (widget);
}
else if (g_strcmp0 (pspec->name, "orientation") == 0 &&
GTK_IS_ORIENTABLE (widget))
{
GtkOrientable *orientable;
orientable = GTK_ORIENTABLE (widget);
state = ATK_STATE_HORIZONTAL;
value = (gtk_orientable_get_orientation (orientable) == GTK_ORIENTATION_HORIZONTAL);
}
else
return;
atk_object_notify_state_change (atk_obj, state, value);
if (state == ATK_STATE_SENSITIVE)
atk_object_notify_state_change (atk_obj, ATK_STATE_ENABLED, value);
if (state == ATK_STATE_HORIZONTAL)
atk_object_notify_state_change (atk_obj, ATK_STATE_VERTICAL, !value);
}
static AtkStateSet *
gtk_widget_accessible_ref_state_set (AtkObject *accessible)
{
GtkWidget *widget;
AtkStateSet *state_set;
state_set = ATK_OBJECT_CLASS (_gtk_widget_accessible_parent_class)->ref_state_set (accessible);
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (accessible));
if (widget == NULL)
atk_state_set_add_state (state_set, ATK_STATE_DEFUNCT);
else
{
if (gtk_widget_is_sensitive (widget))
{
atk_state_set_add_state (state_set, ATK_STATE_SENSITIVE);
atk_state_set_add_state (state_set, ATK_STATE_ENABLED);
}
if (gtk_widget_get_can_focus (widget))
{
atk_state_set_add_state (state_set, ATK_STATE_FOCUSABLE);
}
/*
* We do not currently generate notifications when an ATK object
* corresponding to a GtkWidget changes visibility by being scrolled
* on or off the screen. The testcase for this is the main window
* of the testgtk application in which a set of buttons in a GtkVBox
* is in a scrolled window with a viewport.
*
* To generate the notifications we would need to do the following:
* 1) Find the GtkViewport among the ancestors of the objects
* 2) Create an accessible for the viewport
* 3) Connect to the value-changed signal on the viewport
* 4) When the signal is received we need to traverse the children
* of the viewport and check whether the children are visible or not
* visible; we may want to restrict this to the widgets for which
* accessible objects have been created.
* 5) We probably need to store a variable on_screen in the
* GtkWidgetAccessible data structure so we can determine whether
* the value has changed.
*/
if (gtk_widget_get_visible (widget))
{
atk_state_set_add_state (state_set, ATK_STATE_VISIBLE);
if (gtk_widget_accessible_on_screen (widget) &&
gtk_widget_get_mapped (widget) &&
gtk_widget_accessible_all_parents_visible (widget))
atk_state_set_add_state (state_set, ATK_STATE_SHOWING);
}
if (gtk_widget_has_focus (widget) && (widget == _focus_widget))
{
AtkObject *focus_obj;
focus_obj = g_object_get_data (G_OBJECT (accessible), "gail-focus-object");
if (focus_obj == NULL)
atk_state_set_add_state (state_set, ATK_STATE_FOCUSED);
}
if (gtk_widget_has_default (widget))
atk_state_set_add_state (state_set, ATK_STATE_DEFAULT);
if (GTK_IS_ORIENTABLE (widget))
{
if (gtk_orientable_get_orientation (GTK_ORIENTABLE (widget)) == GTK_ORIENTATION_HORIZONTAL)
atk_state_set_add_state (state_set, ATK_STATE_HORIZONTAL);
else
atk_state_set_add_state (state_set, ATK_STATE_VERTICAL);
}
}
return state_set;
}
