Struct zng::widget::info::TransformChangedArgs

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

TRANSFORM_CHANGED_EVENT args.

Fields

timestamp: DInstant

Instant the event happened.

tree: WidgetInfoTree

Widget tree where some widgets have new inner transforms.

changed: IdMap<WidgetId, PxTransform>

All event subscribers that changed inner-transform mapped to the previous inner-transform.

Implementations

impl TransformChangedArgs

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

New args from values that convert into the argument types.

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

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

impl TransformChangedArgs

pub fn change(&self, id: WidgetId) -> Option<(PxTransform, PxTransform)>

Gets the previous and new inner transform of the widget.

pub fn offset(&self, id: WidgetId) -> Option<Vector2D<Px, Px>>

Gets the movement between previous and new transformed top-left corner.

Trait Implementations

impl AnyEventArgs for TransformChangedArgs

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 + 'static)

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 TransformChangedArgs

fn clone(&self) -> TransformChangedArgs

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for TransformChangedArgs

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

Formats the value using the given formatter.

impl EventArgs for TransformChangedArgs

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

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

Calls handler and stops propagation if propagation is still allowed.