1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66

//! Provides a fully fledged UI system for the Ivy framework.
//!
//! Each UI element is composed of several components. See
//! [`crate::constraints`].
//!
//! ## Positioning
//!
//! The different UI widgets are positioned using constraints.
//!
//! [`constraints::AbsoluteOffset`] specifies an offset in pixels from the parent.
//!
//! [`constraints::RelativeOffset`] specifies an offset proportional to the size of
//! the parent. `(1.0, 1.0)` specifies the top right corner, and `(-1.0, -1.0)`
//! specifies the bottom left corner. This coordinate system is also known as
//! normalized device coordinates. These constraints can be combined and will be
//! applied one after another by attaching them both to an entity.
//!
//! [`constraints::RelativeSize`] size is relative to the parent size. A value larger
//! than 1.0 signifies that the child is larger than the parent.
//!
//! [`constraints::AbsoluteSize`] size is given in absolute pixels. If combined with
//! [`crate::constraints::RelativeSize`] the result is additive. It is possible to supply a
//! negative absolute size if a relative size is used as it will subtract from
//! the parent size. This can be used to specify 50% of parent size, but 10
//! pixels smaller. This is useful for margins.
//!
//! [`constraints::Aspect`] force the width to be dependent on the height.
//!
//! [`constraints::Origin2D`] by default, widgets are positioned by their center. The
//! origin specifies an offset relative to the own size. For example, (1.0, 1.0)
//! moves the widget to be positioned in respect to the top right.
//!
mod canvas;
mod components;
mod error;
mod events;
mod font;
mod image;
mod image_renderer;
mod input_field;
mod layer;
mod layout;
mod reactive;
mod text;
mod text_renderer;
mod vertex;

pub mod constraints;
pub mod systems;

pub use canvas::*;
pub use components::*;
pub use error::*;
pub use events::*;
pub use font::*;
pub use image::*;
pub use image_renderer::*;
pub use input_field::*;
pub use layer::*;
pub use layout::*;
pub use reactive::*;
pub use systems::*;
pub use text::*;
pub use text_renderer::*;
pub use text_renderer::*;
pub use vertex::*;