Sets the state of the action.
This directly updates the 'state' property to the given value.
This should only be called by the implementor of the action. Users
of the action should not attempt to directly modify the 'state'
property. Instead, they should call g_action_change_state() to
request the change.
If the value GVariant is floating, it is consumed.
Since 2.30
Sets the state of the action. This directly updates the 'state' property to the given value. This should only be called by the implementor of the action. Users of the action should not attempt to directly modify the 'state' property. Instead, they should call g_action_change_state() to request the change. If the value GVariant is floating, it is consumed. Since 2.30