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//! # Themes
//!
//! All the built-in components of Freya support themes, so if you find yourself wanting to tweak a certain style attribute of a component you might want to see if it can be changed through a theme.
//!
//! ## `ThemeProvider` component
//!
//! You can wrap your whole app in a [ThemeProvider](freya_components::ThemeProvider) or maybe just a part of it.
//!
//! ### Example
//!
//! ```rust
//! # use freya::prelude::*;
//! // A custom theme based on the Light Theme that simply tweaks some parts of the Button theme.
//! const CUSTOM_THEME: Theme = Theme {
//! button: ButtonTheme {
//! background: Cow::Borrowed("rgb(230, 0, 0)"),
//! hover_background: Cow::Borrowed("rgb(150, 0, 0)"),
//! font_theme: FontTheme {
//! color: Cow::Borrowed("white"),
//! },
//! ..LIGHT_THEME.button
//! },
//! ..LIGHT_THEME
//! };
//!
//! fn app() -> Element {
//! rsx!(
//! // All the components descendant of this ThemeProvider will inherit the Custom Theme
//! // Again, this could be your whole app or maybe just a small part.
//! ThemeProvider {
//! theme: CUSTOM_THEME,
//! Button {
//! label {
//! "Cancel"
//! }
//! }
//! }
//! )
//! }
//! ```
//!
//! ## `use_init_theme` hook
//!
//! This is like `ThemeProvider` but as a hook. You can call this in your root component or somewhere else.
//!
//! ```rust
//! # use freya::prelude::*;
//! // A custom theme based on the Light Theme that simply tweaks some parts of the Button theme.
//! const CUSTOM_THEME: Theme = Theme {
//! button: ButtonTheme {
//! background: Cow::Borrowed("rgb(230, 0, 0)"),
//! hover_background: Cow::Borrowed("rgb(150, 0, 0)"),
//! font_theme: FontTheme {
//! color: Cow::Borrowed("white"),
//! },
//! ..LIGHT_THEME.button
//! },
//! ..LIGHT_THEME
//! };
//!
//! fn app() -> Element {
//! use_init_theme(|| CUSTOM_THEME);
//!
//! rsx!(
//! Button {
//! label {
//! "Cancel"
//! }
//! }
//! )
//! }
//! ```
//!
//! ## `theme` prop
//!
//! Most of the components also support being tweaked via their `theme` prop and with the help of the `theme_with` macro.
//!
//! ### Example
//!
//! ```rust
//! # use freya::prelude::*;
//! fn app() -> Element {
//! rsx!(
//! Button {
//! // You could pass the whole theme or maybe just a part of it
//! theme: theme_with!(ButtonTheme {
//! background: "red".into(),
//! width: "200".into(),
//! }),
//! label {
//! "Cancel"
//! }
//! }
//! )
//! }
//! ```