diff options
Diffstat (limited to 'native/src/renderer.rs')
| -rw-r--r-- | native/src/renderer.rs | 28 |
1 files changed, 5 insertions, 23 deletions
diff --git a/native/src/renderer.rs b/native/src/renderer.rs index ca7ad5a2..ef64ac36 100644 --- a/native/src/renderer.rs +++ b/native/src/renderer.rs @@ -1,24 +1,4 @@ //! Write your own renderer. -//! -//! You will need to implement the `Renderer` trait first. It simply contains -//! an `Output` associated type. -//! -//! There is no common trait to draw all the widgets. Instead, every [`Widget`] -//! constrains its generic `Renderer` type as necessary. -//! -//! This approach is flexible and composable. For instance, the -//! [`Text`] widget only needs a [`text::Renderer`] while a [`Checkbox`] widget -//! needs both a [`text::Renderer`] and a [`checkbox::Renderer`], reusing logic. -//! -//! In the end, a __renderer__ satisfying all the constraints is -//! needed to build a [`UserInterface`]. -//! -//! [`Widget`]: crate::Widget -//! [`UserInterface`]: crate::UserInterface -//! [`Text`]: crate::widget::Text -//! [`text::Renderer`]: crate::widget::text::Renderer -//! [`Checkbox`]: crate::widget::Checkbox -//! [`checkbox::Renderer`]: crate::widget::checkbox::Renderer #[cfg(debug_assertions)] mod null; #[cfg(debug_assertions)] @@ -27,9 +7,11 @@ pub use null::Null; use crate::layout; use crate::{Background, Color, Element, Rectangle, Vector}; -/// A component that can take the state of a user interface and produce an -/// output for its users. +/// A component that can be used by widgets to draw themselves on a screen. pub trait Renderer: Sized { + /// The supported theme of the [`Renderer`]. + type Theme; + /// Lays out the elements of a user interface. /// /// You should override this if you need to perform any operations before or @@ -39,7 +21,7 @@ pub trait Renderer: Sized { element: &Element<'a, Message, Self>, limits: &layout::Limits, ) -> layout::Node { - element.layout(self, limits) + element.as_widget().layout(self, limits) } /// Draws the primitives recorded in the given closure in a new layer. |