Activatable
Object Hierarchy:
Description:
[ Version ( deprecated = true , deprecated_since = "3.10" ) ]
public interface Activatable : Object
Warning: Activatable is deprecated since 3.10.
Activatable widgets can be connected to a Action and reflects the state of its action.
A Activatable can also provide feedback through its action, as they are responsible for activating their related actions.
Implementing GtkActivatable
When extending a class that is already Activatable; it is only necessary to implement the
Activatable->sync_action_properties
and Activatable->
update
methods and chain up to the parent implementation, however when introducing a new Activatable
class; the related_action and
use_action_appearance properties need to be handled by the
implementor. Handling these properties is mostly a matter of installing the action pointer and boolean flag on your instance, and calling
do_set_related_action and
sync_action_properties at the appropriate times.
A class fragment implementing Activatable
enum {
...
PROP_ACTIVATABLE_RELATED_ACTION,
PROP_ACTIVATABLE_USE_ACTION_APPEARANCE
}
struct _FooBarPrivate
{
...
GtkAction *action;
gboolean use_action_appearance;
};
...
static void foo_bar_activatable_interface_init (GtkActivatableIface *iface);
static void foo_bar_activatable_update (GtkActivatable *activatable,
GtkAction *action,
const gchar *property_name);
static void foo_bar_activatable_sync_action_properties (GtkActivatable *activatable,
GtkAction *action);
...
static void
foo_bar_class_init (FooBarClass *klass)
{
...
g_object_class_override_property (gobject_class, PROP_ACTIVATABLE_RELATED_ACTION, "related-action");
g_object_class_override_property (gobject_class, PROP_ACTIVATABLE_USE_ACTION_APPEARANCE, "use-action-appearance");
...
}
static void
foo_bar_activatable_interface_init (GtkActivatableIface *iface)
{
iface->update = foo_bar_activatable_update;
iface->sync_action_properties = foo_bar_activatable_sync_action_properties;
}
... Break the reference using gtk_activatable_do_set_related_action()...
static void
foo_bar_dispose (GObject *object)
{
FooBar *bar = FOO_BAR (object);
FooBarPrivate *priv = FOO_BAR_GET_PRIVATE (bar);
...
if (priv->action)
{
gtk_activatable_do_set_related_action (GTK_ACTIVATABLE (bar), NULL);
priv->action = NULL;
}
G_OBJECT_CLASS (foo_bar_parent_class)->dispose (object);
}
... Handle the “related-action” and “use-action-appearance” properties ...
static void
foo_bar_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
FooBar *bar = FOO_BAR (object);
FooBarPrivate *priv = FOO_BAR_GET_PRIVATE (bar);
switch (prop_id)
{
...
case PROP_ACTIVATABLE_RELATED_ACTION:
foo_bar_set_related_action (bar, g_value_get_object (value));
break;
case PROP_ACTIVATABLE_USE_ACTION_APPEARANCE:
foo_bar_set_use_action_appearance (bar, g_value_get_boolean (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
foo_bar_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
FooBar *bar = FOO_BAR (object);
FooBarPrivate *priv = FOO_BAR_GET_PRIVATE (bar);
switch (prop_id)
{
...
case PROP_ACTIVATABLE_RELATED_ACTION:
g_value_set_object (value, priv->action);
break;
case PROP_ACTIVATABLE_USE_ACTION_APPEARANCE:
g_value_set_boolean (value, priv->use_action_appearance);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
foo_bar_set_use_action_appearance (FooBar *bar,
gboolean use_appearance)
{
FooBarPrivate *priv = FOO_BAR_GET_PRIVATE (bar);
if (priv->use_action_appearance != use_appearance)
{
priv->use_action_appearance = use_appearance;
gtk_activatable_sync_action_properties (GTK_ACTIVATABLE (bar), priv->action);
}
}
... call gtk_activatable_do_set_related_action() and then assign the action pointer,
no need to reference the action here since gtk_activatable_do_set_related_action() already
holds a reference here for you...
static void
foo_bar_set_related_action (FooBar *bar,
GtkAction *action)
{
FooBarPrivate *priv = FOO_BAR_GET_PRIVATE (bar);
if (priv->action == action)
return;
gtk_activatable_do_set_related_action (GTK_ACTIVATABLE (bar), action);
priv->action = action;
}
... Selectively reset and update activatable depending on the use-action-appearance property ...
static void
gtk_button_activatable_sync_action_properties (GtkActivatable *activatable,
GtkAction *action)
{
GtkButtonPrivate *priv = GTK_BUTTON_GET_PRIVATE (activatable);
if (!action)
return;
if (gtk_action_is_visible (action))
gtk_widget_show (GTK_WIDGET (activatable));
else
gtk_widget_hide (GTK_WIDGET (activatable));
gtk_widget_set_sensitive (GTK_WIDGET (activatable), gtk_action_is_sensitive (action));
...
if (priv->use_action_appearance)
{
if (gtk_action_get_stock_id (action))
foo_bar_set_stock (button, gtk_action_get_stock_id (action));
else if (gtk_action_get_label (action))
foo_bar_set_label (button, gtk_action_get_label (action));
...
}
}
static void
foo_bar_activatable_update (GtkActivatable *activatable,
GtkAction *action,
const gchar *property_name)
{
FooBarPrivate *priv = FOO_BAR_GET_PRIVATE (activatable);
if (strcmp (property_name, "visible") == 0)
{
if (gtk_action_is_visible (action))
gtk_widget_show (GTK_WIDGET (activatable));
else
gtk_widget_hide (GTK_WIDGET (activatable));
}
else if (strcmp (property_name, "sensitive") == 0)
gtk_widget_set_sensitive (GTK_WIDGET (activatable), gtk_action_is_sensitive (action));
...
if (!priv->use_action_appearance)
return;
if (strcmp (property_name, "stock-id") == 0)
foo_bar_set_stock (button, gtk_action_get_stock_id (action));
else if (strcmp (property_name, "label") == 0)
foo_bar_set_label (button, gtk_action_get_label (action));
...
}