Struct WidgetAction

pub struct WidgetAction {
    pub data: Option<Arc<dyn ActionTrait>>,
    pub action: Box<dyn WidgetActionTrait>,
    pub widgets: SmallVec<[WidgetRef; 4]>,
    pub widget_uid: WidgetUid,
    pub path: HeapLiveIdPath,
    pub group: Option<WidgetActionGroup>,
}

An action emitted by another widget via the widget_action() method.

Fields

data: Option<Arc<dyn ActionTrait>>

Extra data that can be stored on a widget at draw time, and then cheaply cloned to be emitted as part of an action.

To attach data to a widget action, use the widget_action_with_data() method.

action: Box<dyn WidgetActionTrait>

The emitted action object itself, which acts as a dyn Any-like.

widgets: SmallVec<[WidgetRef; 4]>

The complete list of widgets this action bubbles up from. You can use this to explore the UI tree of the widget that emitted the action.

widget_uid: WidgetUid

The UID of the widget that emitted this action.

path: HeapLiveIdPath

The path-list of the widgets this action bubbles up from (if any).

group: Option<WidgetActionGroup>

Used by list-like widgets (e.g., PortalList) to mark a group-uid around item-actions.

Implementations

impl WidgetAction

pub fn widget(&self) -> &WidgetRef

pub fn widget_nth(&self, n: usize) -> &WidgetRef

pub fn cast<T>(&self) -> T

where T: Default + Clone + WidgetActionTrait + 'static + Send,

pub fn cast_ref<T: WidgetActionTrait + 'static + Send + ActionDefaultRef>( &self, ) -> &T

pub fn downcast_ref<T: WidgetActionTrait + Send + ActionDefaultRef>( &self, ) -> Option<&T>

Trait Implementations

impl Clone for WidgetAction

fn clone(&self) -> WidgetAction

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for WidgetAction

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.