conrod 0.57.0

#[cfg(all(feature="winit", feature="glium"))] #[macro_use] extern crate conrod;
#[cfg(all(feature="winit", feature="glium"))] mod support;

fn main() {
    feature::main();
}

#[cfg(all(feature="winit", feature="glium"))]
mod feature {
    extern crate find_folder;
    use conrod;
    use conrod::backend::glium::glium;
    use conrod::backend::glium::glium::Surface;
    use std;
    use support;

    widget_ids! {
        struct Ids { canvas, list_select }
    }

    pub fn main() {
        const WIDTH: u32 = 600;
        const HEIGHT: u32 = 300;

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

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

        // A unique identifier for each widget.
        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::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();

        // List of entries to display. They should implement the Display trait.
        let list_items = [
            "African Sideneck Turtle".to_string(),
            "Alligator Snapping Turtle".to_string(),
            "Common Snapping Turtle".to_string(),
            "Indian Peacock Softshelled Turtle".to_string(),
            "Eastern River Cooter".to_string(),
            "Eastern Snake Necked Turtle".to_string(),
            "Diamond Terrapin".to_string(),
            "Indian Peacock Softshelled Turtle".to_string(),
            "Musk Turtle".to_string(),
            "Reeves Turtle".to_string(),
            "Eastern Spiny Softshell Turtle".to_string(),
            "Red Ear Slider Turtle".to_string(),
            "Indian Tent Turtle".to_string(),
            "Mud Turtle".to_string(),
            "Painted Turtle".to_string(),
            "Spotted Turtle".to_string()
        ];

        // List of selections, should be same length as list of entries. Will be updated by the widget.
        let mut list_selected = std::collections::HashSet::new();

        // 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::backend::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::Closed |
                        glium::glutin::WindowEvent::KeyboardInput {
                            input: glium::glutin::KeyboardInput {
                                virtual_keycode: Some(glium::glutin::VirtualKeyCode::Escape),
                                ..
                            },
                            ..
                        } => break 'main,
                        _ => (),
                    },
                    _ => (),
                }
            }

            // Instantiate the conrod widgets.
            {
                use conrod::{widget, Borderable, Colorable, Labelable, Positionable, Sizeable, Widget};

                let ui = &mut ui.set_widgets();

                widget::Canvas::new().color(conrod::color::BLUE).set(ids.canvas, ui);

                // Instantiate the `ListSelect` widget.
                let num_items = list_items.len();
                let item_h = 30.0;
                let font_size = item_h as conrod::FontSize / 2;
                let (mut events, scrollbar) = widget::ListSelect::multiple(num_items)
                    .flow_down()
                    .item_size(item_h)
                    .scrollbar_next_to()
                    .w_h(400.0, 230.0)
                    .top_left_with_margins_on(ids.canvas, 40.0, 40.0)
                    .set(ids.list_select, ui);

                // Handle the `ListSelect`s events.
                while let Some(event) = events.next(ui, |i| list_selected.contains(&i)) {
                    use conrod::widget::list_select::Event;
                    match event {

                        // For the `Item` events we instantiate the `List`'s items.
                        Event::Item(item) => {
                            let label = &list_items[item.i];
                            let (color, label_color) = match list_selected.contains(&item.i) {
                                true => (conrod::color::LIGHT_BLUE, conrod::color::YELLOW),
                                false => (conrod::color::LIGHT_GREY, conrod::color::BLACK),
                            };
                            let button = widget::Button::new()
                                .border(0.0)
                                .color(color)
                                .label(label)
                                .label_font_size(font_size)
                                .label_color(label_color);
                            item.set(button, ui);
                        },

                        // The selection has changed.
                        Event::Selection(selection) => {
                            selection.update_index_set(&mut list_selected);
                            println!("selected indices: {:?}", list_selected);
                        },

                        // The remaining events indicate interactions with the `ListSelect` widget.
                        event => println!("{:?}", &event),
                    }
                }

                // Instantiate the scrollbar for the list.
                if let Some(s) = scrollbar { s.set(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>`");
    }
}