Struct State

pub struct State<P>
where
    P: Program + 'static,
{ /* private fields */ }

The execution state of a Program. It leverages caching, event processing, and rendering primitive storage.

Implementations

impl<P> State<P>

where P: Program + 'static,

pub fn new( id: Id, program: P, bounds: Size, renderer: &mut <P as Program>::Renderer, debug: &mut Debug, ) -> State<P>

Creates a new State with the provided Program, initializing its primitive with the given logical bounds and renderer.

pub fn program(&self) -> &P

Returns a reference to the Program of the State.

pub fn queue_event(&mut self, event: Event)

Queues an event in the State for processing during an update.

pub fn queue_message(&mut self, message: <P as Program>::Message)

Queues a message in the State for processing during an update.

pub fn is_queue_empty(&self) -> bool

Returns whether the event queue of the State is empty or not.

pub fn mouse_interaction(&self) -> Interaction

Returns the current mouse::Interaction of the State.

pub fn update( &mut self, id: Id, bounds: Size, cursor: Cursor, renderer: &mut <P as Program>::Renderer, theme: &<P as Program>::Theme, style: &Style, clipboard: &mut dyn Clipboard, debug: &mut Debug, ) -> (Vec<Event>, Option<Task<<P as Program>::Message>>)

Processes all the queued events and messages, rebuilding and redrawing the widgets of the linked Program if necessary.

Returns a list containing the instances of Event that were not captured by any widget, and the Task obtained from Program after updating it, only if an update was necessary.

pub fn operate( &mut self, id: Id, renderer: &mut <P as Program>::Renderer, operations: impl Iterator<Item = Box<dyn Operation>>, bounds: Size, debug: &mut Debug, )

Applies Operations to the State