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//! Base elements required to build views.
//!
//! Views are the main building blocks of your UI.
//!
//! A view can delegate part or all of its responsabilities to child views,
//! forming a view tree. The root of this tree is a `StackView` handled
//! directly by the `Cursive` element.
//!
//! # Layout
//!
//! The layout phase is when the size and location of each view is computed.
//!
//! Each view is given an area of the screen by the `View::layout()` method.
//! With this, the view is free to plan its content, including calling
//! `View::layout()` on its own children.
//!
//! In order to determine how much space should be given each child, parents
//! can use `View::required_size()` on them.
//!
//!
//! ### Contracts
//!
//! When building new Views, you should respect these contracts:
//!
//! * By default, `View::layout()` should be called before any call to
//! `View::draw()` with the same available size. The only exceptions is
//! when both following conditions are met:
//! * The available size has not changed since the last call to
//! `View::layout()`
//! * `View::needs_relayout()` returns `false`
//!
//! In this case, it is safe to omit the call to `View::layout()`.
//!
//! * The value returned by `required_size` should be an actually viable size,
//! no matter what the request is. This means calling `View::layout()` with
//! a size returned by `required_size` is **never** an error.
// Essentials components
// Helper bases
pub
pub use AnyView;
pub use Boxable;
pub use ;
pub use Identifiable;
pub use IntoBoxedView;
pub use Margins;
pub use ;
pub use ScrollStrategy;
pub use ScrollBase;
pub use Scrollable;
pub use SizeCache;
pub use SizeConstraint;
pub use ViewPath;
pub use View;
pub use ViewWrapper;