[−][src]Module kas::draw
Drawing APIs
Multiple drawing APIs are available. Each has a slightly different purpose.
High-level themeable interface
The DrawHandle trait and companion SizeHandle trait provide the
highest-level API over themeable widget components. These traits are
implemented by a theme defined in kas-theme or another crate.
Medium-level drawing interfaces
The Draw trait and its extensions are provided as the building-blocks
used to implement themes, but may also be used directly (as in the clock
example). These traits allow drawing of simple shapes, mostly in the form of
an axis-aligned box or frame with several shading options.
The Draw trait itself contains very little; extension traits
DrawRounded, DrawShaded and DrawText provide additional draw
routines. Toolkits are required to implement only the base Draw trait,
and may provide their own extension traits. For this reason, themes are
parameterised over an object D: Draw + ... (with specified trait bounds).
The medium-level API will be extended in the future to support texturing (not yet supported) and potentially a more comprehensive path-based API (e.g. Lyon).
Low-level interface
There is no universal graphics API, hence none is provided by this crate.
Instead, toolkits may provide their own extensions allowing direct access
to the host graphics API, for example
kas-wgpu::draw::CustomPipe.
Structs
| Colour | Standard colour description |
| InputState | Input and highlighting state of a widget |
| Pass | Pass identifier |
Enums
| ClipRegion | Classification of a clip region |
| TextClass | Class of text drawn |
Traits
| Draw | Base abstraction over drawing |
| DrawHandle | Handle passed to objects during draw and sizing operations |
| DrawHandleExt | Extension trait over |
| DrawRounded | Drawing commands for rounded shapes |
| DrawShaded | Drawing commands for shaded shapes |
| DrawShared | Bounds on type shared across |
| DrawText | Abstraction over text rendering |
| SizeHandle | Handle passed to objects during draw and sizing operations |