This is more general, and necessary if the custom theming is dynamically
generated.
Iced's builtin theme also uses `Box`ed `Fn`, or `Rc` where clone is
required, so this seems reasonable.
Only `Text` is left using `fn`, since it needs to be `Copy`. Hopefully
that can be changed in Iced at some point.
`::custom` methods are added to make these variants a little more
convenient to construct. This replaces a couple `From` implementations,
which are potentially problematic with a generic.
We'll need libcosmic to work on Windows and macOS if we want to use it
in the Keyboard Configurator.
`freedesktop-icons` doesn't seem to build on Windows, so only use it
on Unix systems. It does seem to build on macOS, so leave it as a
dependency there. A good solution for icon bundling on macOS/Windows will
need to be figured out at some point.
BREAKING CHANGE: Various type and function names have changed to reflect
themselves better in documentation. Code has been reorganized into
separate modules with a better placement in libcosmic. Most of the
functions, types, and modules now have documentation and examples.
These changes no longer require the `Model` type to define the
data/component type that it stores. The component functionality is now
optional, and it's also possible to associate many components to an item
with one component per type. This has had a side effect of simplifying a
lot of the type signatures in the implementation.
Before, to insert an item into the model, you had to define a
`SegmentedItem` and a `Component` on insert, and get back an ID for that
item. Which makes it difficult to define an item that contains only an
icon or has no components. And requires an extra insert function to
activate the item on insert.
Now, there is a flexible builder-style API for configuring
newly-inserted items in the model. So the complexity for inserting and
retrieving values from the model has decreased significantly
It's difficult to make iterative developments when there's two
nearly-identical types that need to be kept synchronized to any change.
Rust gives us traits so we should use them instead of duplicating code.
This made it easier to make styling and layout improvements to both
instances of the segmented button.
- Removes the orientation enum in favor of two separate widgets
- Implements the spacing attribute for both widgets
- Demo is updated to display spaced variants of the widgets
