Struct zng_app::widget::info::VisibilityChangedArgs

pub struct VisibilityChangedArgs {
    pub timestamp: DInstant,
    pub tree: WidgetInfoTree,
    pub changed: IdMap<WidgetId, Visibility>,
    /* private fields */
}

VISIBILITY_CHANGED_EVENT args.

Fields

timestamp: DInstant

Instant the event happened.

tree: WidgetInfoTree

Widget tree where some widgets have new visibility.

changed: IdMap<WidgetId, Visibility>

All event subscribers that changed visibility mapped to the previous visibility.

Implementations

impl VisibilityChangedArgs

pub fn new( timestamp: impl Into<DInstant>, propagation_handle: EventPropagationHandle, tree: impl Into<WidgetInfoTree>, changed: impl Into<IdMap<WidgetId, Visibility>>, ) -> Self

New args from values that convert into the argument types.

pub fn now( tree: impl Into<WidgetInfoTree>, changed: impl Into<IdMap<WidgetId, Visibility>>, ) -> Self

Arguments for event that happened now (INSTANT.now).

impl VisibilityChangedArgs

pub fn change(&self, widget_id: WidgetId) -> Option<(Visibility, Visibility)>

Gets the previous and new visibility for the widget, if it has changed.

pub fn prev_vis(&self, widget_id: WidgetId) -> Option<Visibility>

Gets the previous visibility of the widget, if it has changed.

pub fn new_vis(&self, widget_id: WidgetId) -> Option<Visibility>

Gets the new visibility of the widget, if it has changed.

pub fn is_collapse(&self, widget_id: WidgetId) -> bool

Widget was visible or hidden, now is collapsed.

pub fn is_hide(&self, widget_id: WidgetId) -> bool

Widget was visible or collapsed, now is hidden.

pub fn is_show(&self, widget_id: WidgetId) -> bool

Widget was not hidden or collapsed, now is visible.

Trait Implementations

impl AnyEventArgs for VisibilityChangedArgs

fn delivery_list(&self, list: &mut UpdateDeliveryList)

Target the changed widgets.

fn clone_any(&self) -> Box<dyn AnyEventArgs>

Clone the event into a type erased box.

fn as_any(&self) -> &dyn Any

Access to dyn Any methods.

fn timestamp(&self) -> DInstant

Gets the instant this event happened.

fn propagation(&self) -> &EventPropagationHandle

Propagation handle associated with this event instance.

impl Clone for VisibilityChangedArgs

fn clone(&self) -> VisibilityChangedArgs

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for VisibilityChangedArgs

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

Formats the value using the given formatter.

impl EventArgs for VisibilityChangedArgs

fn handle<F, R>(&self, handler: F) -> Option<R>

where F: FnOnce(&Self) -> R,

Calls handler and stops propagation if propagation is still allowed.