commit eb59c1b50ae1a0c2ce9df42cbbd47684f531c0e5
Author: Nathan <nathan.carlson@wanco.com>
Date:   Tue Jun 3 15:48:59 2025 -0600

    feat: initial commit

diff --git a/dot-matrix/.gitignore b/dot-matrix/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/dot-matrix/.gitignore
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diff --git a/dot-matrix/Cargo.lock b/dot-matrix/Cargo.lock
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diff --git a/dot-matrix/Cargo.toml b/dot-matrix/Cargo.toml
new file mode 100644
index 0000000..bf0c0f8
--- /dev/null
+++ b/dot-matrix/Cargo.toml
@@ -0,0 +1,10 @@
+[package]
+name = "dot-matrix"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+gtk = { version = "0.7", package = "gtk4" }
+glib = "0.17"
+cairo-rs = "0.17"
+rand = "0.9.1"
diff --git a/dot-matrix/src/main.rs b/dot-matrix/src/main.rs
new file mode 100644
index 0000000..c008259
--- /dev/null
+++ b/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();
+            }
+        }
+    }
+}
diff --git a/gtk_grid/.gitignore b/gtk_grid/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/gtk_grid/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/gtk_grid/Cargo.lock b/gtk_grid/Cargo.lock
new file mode 100644
index 0000000..bb6befc
--- /dev/null
+++ b/gtk_grid/Cargo.lock
@@ -0,0 +1,813 @@
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+# It is not intended for manual editing.
+version = 4
+
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+ "memchr",
+]
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+ "bitflags",
+]
+
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+source = "registry+https://github.com/rust-lang/crates.io-index"
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+dependencies = [
+ "zerocopy-derive",
+]
+
+[[package]]
+name = "zerocopy-derive"
+version = "0.8.25"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+ "proc-macro2",
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+ "syn",
+]
diff --git a/gtk_grid/Cargo.toml b/gtk_grid/Cargo.toml
new file mode 100644
index 0000000..83c0472
--- /dev/null
+++ b/gtk_grid/Cargo.toml
@@ -0,0 +1,10 @@
+[package]
+name = "gtk_grid"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+gdk4 = "0.9.6"
+gtk4 = "0.9.6"
+rand = "0.9.1"
+
diff --git a/gtk_grid/src/main.rs b/gtk_grid/src/main.rs
new file mode 100644
index 0000000..f631ec7
--- /dev/null
+++ b/gtk_grid/src/main.rs
@@ -0,0 +1,109 @@
+use gdk4::{Cursor, Display};
+use gtk4::prelude::*;
+use gtk4::{Application, ApplicationWindow, DrawingArea, EventControllerMotion};
+use rand::Rng;
+use std::cell::RefCell;
+use std::rc::Rc;
+
+const GRID_SIZE: usize = 10;
+const SQUARE_SIZE: f64 = 30.0;
+const BORDER_WIDTH: f64 = 1.0;
+
+fn main() {
+    let app = gtk4::Application::builder()
+        .application_id("com.example.GridHover")
+        .build();
+    app.connect_activate(build_ui);
+    app.run();
+}
+
+fn build_ui(app: &gtk4::Application) {
+    let colors = Rc::new(generate_colors());
+
+    let hover_cell = Rc::new(RefCell::new(None::<(usize, usize)>));
+
+    let drawing_area = DrawingArea::new();
+    let canvas_size = (GRID_SIZE as f64 * (SQUARE_SIZE + BORDER_WIDTH)) as i32;
+    drawing_area.set_content_width(canvas_size);
+    drawing_area.set_content_height(canvas_size);
+    drawing_area.set_focusable(true);
+    drawing_area.set_draw_func({
+        let colors = colors.clone();
+        let hover_cell = hover_cell.clone();
+        move |_, cr, _, _| {
+            for row in 0..GRID_SIZE {
+                for col in 0..GRID_SIZE {
+                    let x = col as f64 * (SQUARE_SIZE + BORDER_WIDTH);
+                    let y = row as f64 * (SQUARE_SIZE + BORDER_WIDTH);
+
+                    // Draw white border
+                    cr.set_source_rgb(1.0, 1.0, 1.0);
+                    cr.rectangle(x, y, SQUARE_SIZE + BORDER_WIDTH, SQUARE_SIZE + BORDER_WIDTH);
+                    cr.fill().unwrap();
+
+                    // Highlighted?
+                    if Some((col, row)) == *hover_cell.borrow() {
+                        cr.set_source_rgb(0.5, 0.5, 0.5); // gray
+                    } else {
+                        let (r, g, b) = colors[row][col];
+                        cr.set_source_rgb(r, g, b);
+                    }
+
+                    cr.rectangle(
+                        x + BORDER_WIDTH / 2.0,
+                        y + BORDER_WIDTH / 2.0,
+                        SQUARE_SIZE,
+                        SQUARE_SIZE,
+                    );
+                    cr.fill().unwrap();
+                }
+            }
+        }
+    });
+
+    let display = Display::default().unwrap();
+    let cursor = Cursor::from_name("pointer", None);
+
+    if let Some(cursor) = cursor {
+        drawing_area.set_cursor(Some(&cursor));
+    }
+    
+    drawing_area.add_controller({
+        let hover_cell = hover_cell.clone();
+        let drawing_area = drawing_area.clone();
+        let motion_controller = gtk4::EventControllerMotion::new();
+
+        motion_controller.connect_motion(move |_, x, y| {
+            let col = (x / (SQUARE_SIZE + BORDER_WIDTH)).floor() as usize;
+            let row = (y / (SQUARE_SIZE + BORDER_WIDTH)).floor() as usize;
+
+            if col < GRID_SIZE && row < GRID_SIZE {
+                *hover_cell.borrow_mut() = Some((col, row));
+            } else {
+                *hover_cell.borrow_mut() = None;
+            }
+            drawing_area.queue_draw();
+        });
+
+        motion_controller
+    });
+
+    let window = ApplicationWindow::builder()
+        .application(app)
+        .title("Hover Highlight Grid")
+        .child(&drawing_area)
+        .build();
+
+    window.present();
+}
+
+fn generate_colors() -> Vec<Vec<(f64, f64, f64)>> {
+    let mut rng = rand::rng();
+    (0..GRID_SIZE)
+        .map(|_| {
+            (0..GRID_SIZE)
+                .map(|_| (rng.random(), rng.random(), rng.random()))
+                .collect()
+        })
+        .collect()
+}