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Finish wiring overlays to UserInterface

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This commit is contained in:
Héctor Ramón Jiménez 2020-07-08 08:09:14 +02:00
parent 69ac47f463
commit aa0ec2821e
2 changed files with 116 additions and 82 deletions
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4
native/src/program/state.rs
View File

@ -121,12 +121,14 @@ where
debug.event_processing_started();
let mut messages = user_interface.update(
self.queued_events.drain(..),
&self.queued_events,
cursor_position,
clipboard,
renderer,
);
messages.extend(self.queued_messages.drain(..));
self.queued_events.clear();
debug.event_processing_finished();
if messages.is_empty() {

194
native/src/user_interface.rs
View File

@ -1,4 +1,4 @@
use crate::{layout, Clipboard, Element, Event, Layout, Point, Size};
use crate::{layout, Clipboard, Element, Event, Layout, Overlay, Point, Size};
use std::hash::Hasher;
@ -25,11 +25,6 @@ pub struct UserInterface<'a, Message, Renderer> {
bounds: Size,
}
struct Layer {
layout: layout::Node,
hash: u64,
}
impl<'a, Message, Renderer> UserInterface<'a, Message, Renderer>
where
Renderer: crate::Renderer,
@ -99,7 +94,7 @@ where
) -> Self {
let root = root.into();
let base = {
let (base, overlay) = {
let hash = {
let hasher = &mut crate::Hasher::default();
root.hash_layout(hasher);
@ -107,21 +102,28 @@ where
hasher.finish()
};
let layout_is_cached = hash == cache.hash && bounds == cache.bounds;
let layout_is_cached =
hash == cache.base.hash && bounds == cache.bounds;
let layout = if layout_is_cached {
cache.layout
let (layout, overlay) = if layout_is_cached {
(cache.base.layout, cache.overlay)
} else {
renderer.layout(&root, &layout::Limits::new(Size::ZERO, bounds))
(
renderer.layout(
&root,
&layout::Limits::new(Size::ZERO, bounds),
),
None,
)
};
Layer { layout, hash }
(Layer { layout, hash }, overlay)
};
UserInterface {
root,
base,
overlay: None,
overlay,
bounds,
}
}
@ -178,7 +180,7 @@ where
///
/// // Update the user interface
/// let messages = user_interface.update(
/// events.drain(..),
/// &events,
/// cursor_position,
/// None,
/// &renderer,
@ -194,34 +196,22 @@ where
/// ```
pub fn update(
&mut self,
events: impl IntoIterator<Item = Event>,
events: &[Event],
cursor_position: Point,
clipboard: Option<&dyn Clipboard>,
renderer: &Renderer,
) -> Vec<Message> {
let mut messages = Vec::new();
let base_events = if let Some(mut overlay) =
let base_cursor = if let Some(mut overlay) =
self.root.overlay(Layout::new(&self.base.layout))
{
let layer = {
let new_hash = {
let hasher = &mut crate::Hasher::default();
overlay.hash_layout(hasher);
hasher.finish()
};
let layout = match self.overlay.take() {
Some(Layer { hash, layout }) if new_hash == hash => layout,
_ => overlay.layout(&renderer, self.bounds),
};
Layer {
layout,
hash: new_hash,
}
};
let layer = Self::overlay_layer(
self.overlay.take(),
self.bounds,
&mut overlay,
renderer,
);
for event in events {
overlay.on_event(
@ -234,24 +224,30 @@ where
);
}
let base_cursor = if layer.layout.bounds().contains(cursor_position)
{
// TODO: Type-safe cursor availability
Point::new(-1.0, -1.0)
} else {
cursor_position
};
self.overlay = Some(layer);
None
base_cursor
} else {
Some(events)
cursor_position
};
if let Some(events) = base_events {
for event in events {
self.root.widget.on_event(
event,
Layout::new(&self.base.layout),
cursor_position,
&mut messages,
renderer,
clipboard,
);
}
for event in events {
self.root.widget.on_event(
event.clone(),
Layout::new(&self.base.layout),
base_cursor,
&mut messages,
renderer,
clipboard,
);
}
messages
@ -307,7 +303,7 @@ where
/// );
///
/// let messages = user_interface.update(
/// events.drain(..),
/// &events,
/// cursor_position,
/// None,
/// &renderer,
@ -331,9 +327,33 @@ where
renderer: &mut Renderer,
cursor_position: Point,
) -> Renderer::Output {
if let Some(layer) = &self.overlay {
let overlay = if let Some(mut overlay) =
self.root.overlay(Layout::new(&self.base.layout))
{
let layer = Self::overlay_layer(
self.overlay.take(),
self.bounds,
&mut overlay,
renderer,
);
let overlay_bounds = layer.layout.bounds();
let overlay_primitives = overlay.draw(
renderer,
&Renderer::Defaults::default(),
Layout::new(&layer.layout),
cursor_position,
);
self.overlay = Some(layer);
Some((overlay_primitives, overlay_bounds))
} else {
None
};
if let Some((overlay_primitives, overlay_bounds)) = overlay {
let base_cursor = if overlay_bounds.contains(cursor_position) {
Point::new(-1.0, -1.0)
} else {
@ -347,24 +367,11 @@ where
base_cursor,
);
if let Some(overlay) =
self.root.overlay(Layout::new(&self.base.layout))
{
let overlay_primitives = overlay.draw(
renderer,
&Renderer::Defaults::default(),
Layout::new(&layer.layout),
cursor_position,
);
renderer.overlay(
base_primitives,
overlay_primitives,
overlay_bounds,
)
} else {
base_primitives
}
renderer.overlay(
base_primitives,
overlay_primitives,
overlay_bounds,
)
} else {
self.root.widget.draw(
renderer,
@ -382,11 +389,41 @@ where
/// [`UserInterface`]: struct.UserInterface.html
pub fn into_cache(self) -> Cache {
Cache {
hash: self.base.hash,
layout: self.base.layout,
base: self.base,
overlay: self.overlay,
bounds: self.bounds,
}
}
fn overlay_layer(
cache: Option<Layer>,
bounds: Size,
overlay: &mut Overlay<'_, Message, Renderer>,
renderer: &Renderer,
) -> Layer {
let new_hash = {
let hasher = &mut crate::Hasher::default();
overlay.hash_layout(hasher);
hasher.finish()
};
let layout = match cache {
Some(Layer { hash, layout }) if new_hash == hash => layout,
_ => overlay.layout(renderer, bounds),
};
Layer {
layout,
hash: new_hash,
}
}
}
#[derive(Debug, Clone)]
struct Layer {
layout: layout::Node,
hash: u64,
}
/// Reusable data of a specific [`UserInterface`].
@ -394,8 +431,8 @@ where
/// [`UserInterface`]: struct.UserInterface.html
#[derive(Debug, Clone)]
pub struct Cache {
hash: u64,
layout: layout::Node,
base: Layer,
overlay: Option<Layer>,
bounds: Size,
}
@ -409,8 +446,11 @@ impl Cache {
/// [`UserInterface`]: struct.UserInterface.html
pub fn new() -> Cache {
Cache {
hash: 0,
layout: layout::Node::new(Size::new(0.0, 0.0)),
base: Layer {
layout: layout::Node::new(Size::new(0.0, 0.0)),
hash: 0,
},
overlay: None,
bounds: Size::ZERO,
}
}
@ -421,11 +461,3 @@ impl Default for Cache {
Cache::new()
}
}
impl PartialEq for Cache {
fn eq(&self, other: &Cache) -> bool {
self.hash == other.hash
}
}
impl Eq for Cache {}