feat: initial commit

dot-matrix/src/main.rs

@@ -0,0 +1,76 @@
+use rand::prelude::*;
+use gtk::prelude::*;
+use gtk::{Application, ApplicationWindow, DrawingArea};
+use gtk::cairo::Context;
+
+fn main() {
+    let app = Application::builder()
+        .application_id("com.example.DotMatrix")
+        .build();
+
+    app.connect_activate(build_ui);
+    app.run();
+}
+
+fn build_ui(app: &gtk::Application) {
+
+    let window = ApplicationWindow::builder()
+        .application(app)
+        .title("Dot Matrix")
+        .default_width(1000)
+        .default_height(800)
+        .build();
+
+    let drawing_area = DrawingArea::new();
+
+    let mut rng = rand::rng();
+   
+    let rows = 100 as u32;
+    let cols = 100 as u32;
+
+    // Generate the matrix using iterators
+    let dot_matrix: Vec<Vec<u32>> = (0..rows)
+        .map(|_| {
+            (0..cols)
+                .map(|_| rng.random_range(0..=10))
+                .collect()
+        })
+        .collect();
+    
+
+    drawing_area.set_draw_func(move |_area, cr, width, height| {
+        draw_dot_matrix(cr, width, height, &dot_matrix);
+    });
+
+    window.set_child(Some(&drawing_area));
+    window.show();
+}
+
+fn draw_dot_matrix(cr: &Context, width: i32, height: i32, matrix: &Vec<Vec<u32>>) {
+    let rows = matrix.len();
+    let cols = if rows > 0 { matrix[0].len() } else { 0 };
+
+    // Background: dark gray
+    cr.set_source_rgb(0.1, 0.1, 0.1);
+    cr.rectangle(0.0, 0.0, width as f64, height as f64);
+    cr.fill();
+
+    // Set dot color (yellow)
+    cr.set_source_rgb(1.0, 1.0, 0.0);
+
+    // Calculate spacing
+    let spacing_x = 8.0;
+    let spacing_y = 8.0;
+    let radius = 2.0;
+
+    for (row_index, row) in matrix.iter().enumerate() {
+        for (col_index, &val) in row.iter().enumerate() {
+            if val == 1 {
+                let x = (col_index as f64 + 0.5) * spacing_x;
+                let y = (row_index as f64 + 0.5) * spacing_y;
+                cr.arc(x, y, radius, 0.0, std::f64::consts::PI * 2.0);
+                cr.fill();
+            }
+        }
+    }
+}