Struct zng::widget::info::VisibilityChangedArgs

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

VISIBILITY_CHANGED_EVENT args.

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§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§

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impl VisibilityChangedArgs

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

New args from values that convert into the argument types.

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

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

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impl VisibilityChangedArgs

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

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

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

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

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

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

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

Widget was visible or hidden, now is collapsed.

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

Widget was visible or collapsed, now is hidden.

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

Widget was not hidden or collapsed, now is visible.

Trait Implementations§

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impl AnyEventArgs for VisibilityChangedArgs

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

Target the changed widgets.

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

Clone the event into a type erased box.
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fn as_any(&self) -> &(dyn Any + 'static)

Access to dyn Any methods.
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fn timestamp(&self) -> DInstant

Gets the instant this event happened.
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fn propagation(&self) -> &EventPropagationHandle

Propagation handle associated with this event instance. Read more
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impl Clone for VisibilityChangedArgs

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fn clone(&self) -> VisibilityChangedArgs

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for VisibilityChangedArgs

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

Formats the value using the given formatter. Read more
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impl EventArgs for VisibilityChangedArgs

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

Calls handler and stops propagation if propagation is still allowed. Read more

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