canvas_window.rs

use flo_draw::*;
use flo_canvas::*;

///
/// Simple example that displays a canvas window and renders a triangle
///
pub fn main() {
    // 'with_2d_graphics' is used to support operating systems that can't run event loops anywhere other than the main thread
    with_2d_graphics(|| {
        // Create a window
        let canvas = create_drawing_window("Canvas window");

        // Render a triangle to it
        canvas.draw(|gc| {
            // Clear the canvas and set up the coordinates
            gc.clear_canvas(Color::Rgba(0.3, 0.2, 0.0, 1.0));
            gc.canvas_height(1000.0);
            gc.center_region(0.0, 0.0, 1000.0, 1000.0);

            // Draw a rectangle...
            gc.new_path();
            gc.move_to(0.0, 0.0);
            gc.line_to(1000.0, 0.0);
            gc.line_to(1000.0, 1000.0);
            gc.line_to(0.0, 1000.0);
            gc.line_to(0.0, 0.0);

            gc.fill_color(Color::Rgba(1.0, 1.0, 0.8, 1.0));
            gc.fill();

            // Draw a triangle on top
            gc.new_path();
            gc.move_to(200.0, 200.0);
            gc.line_to(800.0, 200.0);
            gc.line_to(500.0, 800.0);
            gc.line_to(200.0, 200.0);

            gc.fill_color(Color::Rgba(0.0, 0.0, 0.8, 1.0));
            gc.fill();
        });
    });
}