Crate cuicui_layout

Layouting system for bevy cuicui.

The layouting system is very dumb. It is based on Containers. A Container layouts its content in either a column or a row.

The individual items are positioned according to:

• Container::align: The container’s children Alignment.
• Container::distrib: The container’s children Distribution.
• Container::flow: The direction in which the container’s children Flow.

By default, items are aligned at the center of the container, distributed on the flow direction evenly within the container.

All things in a cuicui layout has a known size. This is why everything needs to live in a root container of a fixed size.

That’s it! Now make a nice UI using bevy.

Modules

• bundles
  Bevy [Bundle]s grouping components used by the layouting systems.
• dsl
  The base MakeBundle for layouts.

Macros

• layout
  Wrapper around MakeBundle.

Structs

• ComputeLayoutError
  An error caused by a bad layout.
• Container
  Parameters of a container, ie: a node that contains other nodes.
• LayoutRootCamera
  Use this camera’s logical size as the root fixed-size container for cuicui_layout.
• Oriented
  Similar to Size, but relative to a Flow direction.
• Plug
  Add the compute_layout system to the bevy Update set.
• PosRect
  Position and size of a Node as computed by the layouting algo.
• Root
  A root Container. This acts as a Container, but layouting “starts” from it.
• ScreenRoot
  Set this Root to track the LayoutRootCamera’s size.
• Size
  A T that applies to the width and height of something.

Enums

• Alignment
  The cross axis alignment. Aka alignment.
• Distribution
  The main axis alignment. Aka distribution.
• Flow
  The layout direction of a Container.
• LeafRule
  A constraint on an axis of a terminal Node (ie: doesn’t have a Children constraint).
• Node
  A [Component] integrating the attached [Entity] into the cuicui_layout layouting algorithm.
• Rule
  A constraint on an axis of containers.
• Systems
  Systems added by Plug.

Functions

• compute_layout
  Run the layout algorithm on entities with Node and PosRect components.
• update_transforms
  Update transform of things that have a PosRect component.

Type Definitions

• NodeQuery
  WorldQuery item used by the layout function.