Crate kas

KAS, the toolKit Abstraction Library

KAS is a GUI library. This crate provides the following:

• the Widget trait family, with macros to implement them
• a layout solver and event handling for widgets
• building blocks including geom types and a draw API
• some pre-build widgets: the widget module

See also these external crates:

• kas-theme - docs.rs - theme API + themes
• kas-wgpu - docs.rs - WebGPU + winit integration

This document is a reference manual. There is currently no tutorial, but the examples provide a starting point.

Modules

class	Class-specific widget traits
draw	Drawing APIs
event	Event handling
geom	Geometry data types
layout	Layout solver
macros	Library macros
prelude	KAS prelude
text	Abstractions over kas-text
widget	Widget library

Structs

AlignHints	Partial alignment information provided by the parent
CompleteAlignment	Provides alignment information on both axes along with ideal size
CoreData	Common widget data
Down	Fixed instantiation of Directional
Future	A future value, pending UI operation
Left	Fixed instantiation of Directional
Popup	A widget which escapes its parent's rect
Right	Fixed instantiation of Directional
Up	Fixed instantiation of Directional
WidgetId	Widget identifier
WindowId	Identifier for a window or pop-up

Enums

Align	Alignment of contents
Direction	Axis-aligned directions
ThemeAction	Return value of ThemeApi functions
TkAction	Action required after processing

Traits

Boxed	Provides a convenient .boxed() method on implementors
Directional	Trait over directional types
Layout	Positioning and drawing routines for widgets
LayoutData	Trait to describe the type needed by the layout implementation.
ThemeApi	Interface through which a theme can be adjusted at run-time
Widget	Widget trait
WidgetChildren	Listing of a widget's children
WidgetConfig	Widget configuration
WidgetCore	Base widget functionality
Window	Functionality required by a window