1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
pub use iced_wgpu::{Primitive, Renderer};
pub use iced_winit::{
button, slider, text, winit, Align, Background, Checkbox, Color, Image,
Justify, Length, Radio, Slider, Text,
};
pub type Element<'a, Message> = iced_winit::Element<'a, Message, Renderer>;
pub type Row<'a, Message> = iced_winit::Row<'a, Message, Renderer>;
pub type Column<'a, Message> = iced_winit::Column<'a, Message, Renderer>;
pub type Button<'a, Message> = iced_winit::Button<'a, Message, Renderer>;
pub trait UserInterface {
type Message;
fn update(&mut self, message: Self::Message);
fn view(&mut self) -> Element<Self::Message>;
fn run(mut self)
where
Self: 'static + Sized,
{
use winit::{
event::{Event, WindowEvent},
event_loop::{ControlFlow, EventLoop},
window::WindowBuilder,
};
let event_loop = EventLoop::new();
// TODO: Ask for window settings and configure this properly
let window = WindowBuilder::new()
.build(&event_loop)
.expect("Open window");
let size = window.inner_size().to_physical(window.hidpi_factor());;
let (width, height) = (size.width as u16, size.height as u16);
let mut renderer = Renderer::new(&window);
let mut target = renderer.target(width, height);
let user_interface = iced_winit::UserInterface::build(
document(&mut self, width, height),
iced_winit::Cache::default(),
&mut renderer,
);
let mut primitive = user_interface.draw(&mut renderer);
let mut cache = Some(user_interface.into_cache());
let mut events = Vec::new();
window.request_redraw();
event_loop.run(move |event, _, control_flow| match event {
Event::EventsCleared => {
// TODO: We should be able to keep a user interface alive
// between events once we remove state references.
//
// This will allow us to rebuild it only when a message is
// handled.
let mut user_interface = iced_winit::UserInterface::build(
document(&mut self, width, height),
cache.take().unwrap(),
&mut renderer,
);
let messages = user_interface.update(events.drain(..));
if messages.is_empty() {
primitive = user_interface.draw(&mut renderer);
cache = Some(user_interface.into_cache());
} else {
// When there are messages, we are forced to rebuild twice
// for now :^)
let temp_cache = user_interface.into_cache();
for message in messages {
self.update(message);
}
let user_interface = iced_winit::UserInterface::build(
document(&mut self, width, height),
temp_cache,
&mut renderer,
);
primitive = user_interface.draw(&mut renderer);
cache = Some(user_interface.into_cache());
}
window.request_redraw();
}
Event::WindowEvent {
event: WindowEvent::RedrawRequested,
..
} => {
renderer.draw(&mut target, &primitive);
// TODO: Handle animations!
// Maybe we can use `ControlFlow::WaitUntil` for this.
}
Event::WindowEvent {
event: WindowEvent::CloseRequested,
..
} => {
*control_flow = ControlFlow::Exit;
}
_ => {
*control_flow = ControlFlow::Wait;
}
})
}
}
fn document<UserInterface>(
user_interface: &mut UserInterface,
width: u16,
height: u16,
) -> Element<UserInterface::Message>
where
UserInterface: self::UserInterface,
UserInterface::Message: 'static,
{
Column::new()
.width(Length::Units(width))
.height(Length::Units(height))
.push(user_interface.view())
.into()
}
|
