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Add Renderer and Primitive concepts

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This commit is contained in:
Héctor Ramón Jiménez 2019-10-05 03:56:18 +02:00
parent 5204cc8c8b
commit a7d1194403
15 changed files with 227 additions and 126 deletions
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62
native/src/user_interface.rs
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@ -1,7 +1,7 @@
use crate::{input::mouse, Column, Element, Event, Layout, MouseCursor, Point};
use crate::{input::mouse, Element, Event, Layout, Point};
use std::hash::Hasher;
use stretch::result;
use stretch::{geometry, result};
/// A set of interactive graphical elements with a specific [`Layout`].
///
@ -19,7 +19,10 @@ pub struct UserInterface<'a, Message, Renderer> {
cursor_position: Point,
}
impl<'a, Message, Renderer> UserInterface<'a, Message, Renderer> {
impl<'a, Message, Renderer> UserInterface<'a, Message, Renderer>
where
Renderer: crate::Renderer,
{
/// Builds a user interface for an [`Element`].
///
/// It is able to avoid expensive computations when using a [`Cache`]
@ -44,6 +47,19 @@ impl<'a, Message, Renderer> UserInterface<'a, Message, Renderer> {
/// # impl Renderer {
/// # pub fn new() -> Self { Renderer }
/// # }
/// #
/// # impl iced_native::Renderer for Renderer { type Primitive = (); }
/// #
/// # impl iced_native::column::Renderer for Renderer {
/// # fn draw<Message>(
/// # &mut self,
/// # _column: &iced_native::Column<'_, Message, Self>,
/// # _layout: iced_native::Layout<'_>,
/// # _cursor_position: iced_native::Point,
/// # ) -> Self::Primitive {
/// # ()
/// # }
/// # }
/// # }
/// #
/// # use iced_native::Column;
@ -127,6 +143,19 @@ impl<'a, Message, Renderer> UserInterface<'a, Message, Renderer> {
/// # impl Renderer {
/// # pub fn new() -> Self { Renderer }
/// # }
/// #
/// # impl iced_native::Renderer for Renderer { type Primitive = (); }
/// #
/// # impl iced_native::column::Renderer for Renderer {
/// # fn draw<Message>(
/// # &mut self,
/// # _column: &iced_native::Column<'_, Message, Self>,
/// # _layout: iced_native::Layout<'_>,
/// # _cursor_position: iced_native::Point,
/// # ) -> Self::Primitive {
/// # ()
/// # }
/// # }
/// # }
/// #
/// # use iced_native::Column;
@ -212,6 +241,19 @@ impl<'a, Message, Renderer> UserInterface<'a, Message, Renderer> {
/// # impl Renderer {
/// # pub fn new() -> Self { Renderer }
/// # }
/// #
/// # impl iced_native::Renderer for Renderer { type Primitive = (); }
/// #
/// # impl iced_native::column::Renderer for Renderer {
/// # fn draw<Message>(
/// # &mut self,
/// # _column: &iced_native::Column<'_, Message, Self>,
/// # _layout: iced_native::Layout<'_>,
/// # _cursor_position: iced_native::Point,
/// # ) -> Self::Primitive {
/// # ()
/// # }
/// # }
/// # }
/// #
/// # use iced_native::Column;
@ -254,7 +296,7 @@ impl<'a, Message, Renderer> UserInterface<'a, Message, Renderer> {
/// // Flush rendering operations...
/// }
/// ```
pub fn draw(&self, renderer: &mut Renderer) -> MouseCursor {
pub fn draw(&self, renderer: &mut Renderer) -> Renderer::Primitive {
self.root.widget.draw(
renderer,
Layout::new(&self.layout),
@ -295,14 +337,16 @@ impl Cache {
/// [`Cache`]: struct.Cache.html
/// [`UserInterface`]: struct.UserInterface.html
pub fn new() -> Cache {
let root: Element<'_, (), ()> = Column::new().into();
use crate::{Node, Style};
let hasher = &mut crate::Hasher::default();
root.hash_layout(hasher);
let empty_node = Node::new(Style::default());
Cache {
hash: hasher.finish(),
layout: root.compute_layout(&mut ()),
hash: 0,
layout: empty_node
.0
.compute_layout(geometry::Size::undefined())
.unwrap(),
cursor_position: Point::new(0.0, 0.0),
}
}