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
//! A simple example that demonstrates using conrod within a basic `winit` window loop, using
//! `glium` to render the `conrod::render::Primitives` to screen.
//!
//! Note that the event loop that we create in this example behaves the same as the example
//! `EventLoop` in the `examples/support` module. It has been inlined in order to provide an
//! example that does not depend on the `support` module.
#[cfg(all(feature="winit", feature="glium"))] #[macro_use] extern crate conrod;
fn main() {
feature::main();
}
#[cfg(all(feature="winit", feature="glium"))]
mod feature {
use conrod::{self, widget, Colorable, Positionable, Widget};
use conrod::backend::glium::glium;
use conrod::backend::glium::glium::{DisplayBuild, Surface};
use std;
pub fn main() {
const WIDTH: u32 = 400;
const HEIGHT: u32 = 200;
// Build the window.
let display = glium::glutin::WindowBuilder::new()
.with_vsync()
.with_dimensions(WIDTH, HEIGHT)
.with_title("Hello Conrod!")
.with_multisampling(4)
.build_glium()
.unwrap();
// construct our `Ui`.
let mut ui = conrod::UiBuilder::new([WIDTH as f64, HEIGHT as f64]).build();
// Generate the widget identifiers.
widget_ids!(struct Ids { text });
let ids = Ids::new(ui.widget_id_generator());
// Add a `Font` to the `Ui`'s `font::Map` from file.
const FONT_PATH: &'static str =
concat!(env!("CARGO_MANIFEST_DIR"), "/assets/fonts/NotoSans/NotoSans-Regular.ttf");
ui.fonts.insert_from_file(FONT_PATH).unwrap();
// A type used for converting `conrod::render::Primitives` into `Command`s that can be used
// for drawing to the glium `Surface`.
let mut renderer = conrod::backend::glium::Renderer::new(&display).unwrap();
// The image map describing each of our widget->image mappings (in our case, none).
let image_map = conrod::image::Map::<glium::texture::Texture2d>::new();
// Poll events from the window.
let mut last_update = std::time::Instant::now();
let mut ui_needs_update = true;
'main: loop {
// We don't want to loop any faster than 60 FPS, so wait until it has been at least
// 16ms since the last yield.
let sixteen_ms = std::time::Duration::from_millis(16);
let duration_since_last_update = std::time::Instant::now().duration_since(last_update);
if duration_since_last_update < sixteen_ms {
std::thread::sleep(sixteen_ms - duration_since_last_update);
}
// Collect all pending events.
let mut events: Vec<_> = display.poll_events().collect();
// If there are no events and the `Ui` does not need updating, wait for the next event.
if events.is_empty() && !ui_needs_update {
events.extend(display.wait_events().next());
}
// Reset the needs_update flag and time this update.
ui_needs_update = false;
last_update = std::time::Instant::now();
// Handle all events.
for event in events {
// Use the `winit` backend feature to convert the winit event to a conrod one.
if let Some(event) = conrod::backend::winit::convert(event.clone(), &display) {
ui.handle_event(event);
ui_needs_update = true;
}
match event {
// Break from the loop upon `Escape`.
glium::glutin::Event::KeyboardInput(_, _, Some(glium::glutin::VirtualKeyCode::Escape)) |
glium::glutin::Event::Closed =>
break 'main,
_ => {},
}
}
// Instantiate all widgets in the GUI.
{
let ui = &mut ui.set_widgets();
// "Hello World!" in the middle of the screen.
widget::Text::new("Hello World!")
.middle_of(ui.window)
.color(conrod::color::WHITE)
.font_size(32)
.set(ids.text, ui);
}
// Render the `Ui` and then display it on the screen.
if let Some(primitives) = ui.draw_if_changed() {
renderer.fill(&display, primitives, &image_map);
let mut target = display.draw();
target.clear_color(0.0, 0.0, 0.0, 1.0);
renderer.draw(&display, &mut target, &image_map).unwrap();
target.finish().unwrap();
}
}
}
}
#[cfg(not(all(feature="winit", feature="glium")))]
mod feature {
pub fn main() {
println!("This example requires the `winit` and `glium` features. \
Try running `cargo run --release --features=\"winit glium\" --example <example_name>`");
}
}