conrod_glium 0.62.0

#[macro_use] extern crate conrod_core;
extern crate conrod_glium;
extern crate conrod_winit;
extern crate find_folder;
extern crate glium;

use conrod_core::{widget, Labelable, Positionable, Sizeable, Widget};
use glium::Surface;

mod support;

fn main() {
    const WIDTH: u32 = 200;
    const HEIGHT: u32 = 200;

    // Build the window.
    let mut events_loop = glium::glutin::EventsLoop::new();
    let window = glium::glutin::WindowBuilder::new()
        .with_title("Click me!")
        .with_dimensions((WIDTH, HEIGHT).into());
    let context = glium::glutin::ContextBuilder::new()
        .with_vsync(true)
        .with_multisampling(4);
    let display = glium::Display::new(window, context, &events_loop).unwrap();
    let display = support::GliumDisplayWinitWrapper(display);

    // construct our `Ui`.
    let mut ui = conrod_core::UiBuilder::new([WIDTH as f64, HEIGHT as f64]).build();

    // Generate the widget identifiers.
    widget_ids!(struct Ids { canvas, counter });
    let ids = Ids::new(ui.widget_id_generator());

    // Add a `Font` to the `Ui`'s `font::Map` from file.
    let assets = find_folder::Search::KidsThenParents(3, 5).for_folder("assets").unwrap();
    let font_path = assets.join("fonts/NotoSans/NotoSans-Regular.ttf");
    ui.fonts.insert_from_file(font_path).unwrap();

    // A type used for converting `conrod_core::render::Primitives` into `Command`s that can be used
    // for drawing to the glium `Surface`.
    let mut renderer = conrod_glium::Renderer::new(&display.0).unwrap();

    // The image map describing each of our widget->image mappings (in our case, none).
    let image_map = conrod_core::image::Map::<glium::texture::Texture2d>::new();

    let mut count = 0;

    // Poll events from the window.
    let mut event_loop = support::EventLoop::new();
    'main: loop {

        // Handle all events.
        for event in event_loop.next(&mut events_loop) {

            // Use the `winit` backend feature to convert the winit event to a conrod one.
            if let Some(event) = conrod_winit::convert_event(event.clone(), &display) {
                ui.handle_event(event);
                event_loop.needs_update();
            }

            match event {
                glium::glutin::Event::WindowEvent { event, .. } => match event {
                    // Break from the loop upon `Escape`.
                    glium::glutin::WindowEvent::CloseRequested |
                    glium::glutin::WindowEvent::KeyboardInput {
                        input: glium::glutin::KeyboardInput {
                            virtual_keycode: Some(glium::glutin::VirtualKeyCode::Escape),
                            ..
                        },
                        ..
                    } => break 'main,
                    _ => (),
                },
                _ => (),
            }
        }

        // Instantiate all widgets in the GUI.
        {
            let ui = &mut ui.set_widgets();

            // Create a background canvas upon which we'll place the button.
            widget::Canvas::new().pad(40.0).set(ids.canvas, ui);

            // Draw the button and increment `count` if pressed.
            for _click in widget::Button::new()
                .middle_of(ids.canvas)
                .w_h(80.0, 80.0)
                .label(&count.to_string())
                .set(ids.counter, ui)
            {
                count += 1;
            }
        }

        // Render the `Ui` and then display it on the screen.
        if let Some(primitives) = ui.draw_if_changed() {
            renderer.fill(&display.0, primitives, &image_map);
            let mut target = display.0.draw();
            target.clear_color(0.0, 0.0, 0.0, 1.0);
            renderer.draw(&display.0, &mut target, &image_map).unwrap();
            target.finish().unwrap();
        }
    }
}