Draw the grid and a grain of sand
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c27ce7fe80
commit
2323443378
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@ -1,38 +1,122 @@
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use cairo::Context;
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use glib::Object;
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use gtk::{prelude::*, subclass::prelude::*};
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use std::cell::RefCell;
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const WIDTH: i32 = 600;
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const HEIGHT: i32 = 600;
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const WIDTH: usize = 601;
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const HEIGHT: usize = 601;
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const CELL_SIZE: usize = 10;
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#[derive(Debug, Default)]
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pub struct SandPrivate;
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pub struct SandViewPrivate {
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area: RefCell<SandArea>,
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}
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#[glib::object_subclass]
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impl ObjectSubclass for SandPrivate {
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const NAME: &'static str = "Sand";
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type Type = Sand;
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impl ObjectSubclass for SandViewPrivate {
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const NAME: &'static str = "SandView";
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type Type = SandView;
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type ParentType = gtk::DrawingArea;
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}
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impl ObjectImpl for SandPrivate {}
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impl WidgetImpl for SandPrivate {}
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impl DrawingAreaImpl for SandPrivate {}
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impl ObjectImpl for SandViewPrivate {}
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impl WidgetImpl for SandViewPrivate {}
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impl DrawingAreaImpl for SandViewPrivate {}
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glib::wrapper! {
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pub struct Sand(ObjectSubclass<SandPrivate>) @extends gtk::DrawingArea, gtk::Widget;
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pub struct SandView(ObjectSubclass<SandViewPrivate>) @extends gtk::DrawingArea, gtk::Widget;
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}
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impl Sand {
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pub fn new() -> Self {
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impl Default for SandView {
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fn default() -> Self {
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let s: Self = Object::builder().build();
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s.set_width_request(WIDTH);
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s.set_height_request(HEIGHT);
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s.set_width_request(WIDTH as i32);
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s.set_height_request(HEIGHT as i32);
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s.set_draw_func({
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let s = s.clone();
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move |_, context, width, height| {
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println!("{} {}", width, height);
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context.set_source_rgb(0., 0., 0.);
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let _ = context.paint();
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context.set_source_rgb(0.1, 0.1, 0.1);
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for x in (0..width).step_by(CELL_SIZE) {
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context.move_to(x as f64, 0.);
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context.line_to(x as f64, HEIGHT as f64);
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}
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for y in (0..height).step_by(CELL_SIZE) {
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context.move_to(0., y as f64);
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context.line_to(WIDTH as f64, y as f64);
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}
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let _ = context.stroke();
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let area = s.imp().area.borrow();
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for x in 0..area.width {
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for y in 0..area.height {
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if area.grain(x, y) {
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context.set_source_rgb(0.8, 0.8, 0.8);
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} else {
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context.set_source_rgb(0., 0., 0.);
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}
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context.rectangle(
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(x * CELL_SIZE + 1) as f64,
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(y * CELL_SIZE + 1) as f64,
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(CELL_SIZE - 2) as f64,
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(CELL_SIZE - 2) as f64,
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);
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let _ = context.fill();
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}
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}
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}
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});
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s
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}
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}
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impl SandView {
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fn set_area(&self, area: SandArea) {
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*self.imp().area.borrow_mut() = area;
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}
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}
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#[derive(Clone, Debug)]
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struct SandArea {
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width: usize,
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height: usize,
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grains: Vec<bool>,
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}
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impl Default for SandArea {
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fn default() -> Self {
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let width = WIDTH / CELL_SIZE;
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let height = HEIGHT / CELL_SIZE;
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Self {
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width,
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height,
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grains: vec![false; width * height],
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}
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}
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}
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impl SandArea {
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pub fn add_grain(&mut self, x: usize, y: usize) {
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let addr = self.addr(x, y);
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self.grains[addr] = true;
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}
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pub fn grain(&self, x: usize, y: usize) -> bool {
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self.grains[self.addr(x, y)]
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}
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pub fn tick(self) -> Self {
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unimplemented!()
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}
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fn addr(&self, x: usize, y: usize) -> usize {
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y * self.width + x
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}
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}
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fn main() {
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let app = gtk::Application::builder()
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.application_id("com.luminescent-dreams.falling-sand")
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@ -42,9 +126,12 @@ fn main() {
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let window = gtk::ApplicationWindow::new(app);
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window.present();
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let sand = Sand::new();
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let view = SandView::default();
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let mut sand_area = SandArea::default();
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sand_area.add_grain(20, 20);
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view.set_area(sand_area.clone());
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window.set_child(Some(&sand));
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window.set_child(Some(&view));
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});
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app.run();
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