Trait ViewState

pub trait ViewState:
    Any
    + Sync
    + Send {
    // Required methods
    fn as_any(&self) -> &(dyn Any + 'static);
    fn as_any_mut(&mut self) -> &mut (dyn Any + 'static);
}

Unserialized frame to frame state of a view.

For any state that should be persisted, use the Blueprint! This state is used for transient state, such as animation or uncommitted ui state like dragging a camera. (on mouse release, the camera would be committed to the blueprint).

Required Methods

fn as_any(&self) -> &(dyn Any + 'static)

Converts itself to a reference of std::any::Any, which enables downcasting to concrete types.

fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Converts itself to a reference of std::any::Any, which enables downcasting to concrete types.

Trait Implementations

impl ViewStateExt for dyn ViewState

fn downcast_ref<T>(&self) -> Result<&T, ViewSystemExecutionError>

where T: ViewState,

Downcasts this state to a reference of a concrete type.

fn downcast_mut<T>(&mut self) -> Result<&mut T, ViewSystemExecutionError>

where T: ViewState,

Downcasts this state to a mutable reference of a concrete type.

Implementations on Foreign Types

impl ViewState for ()

Implementation of an empty view state.

fn as_any(&self) -> &(dyn Any + 'static)

fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

impl ViewState for GraphViewState

fn as_any(&self) -> &(dyn Any + 'static)

fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Implementors