Sudoku up through chapter 7

piston-tutorials/sudoku/src/gameboard.rs

@@ -1,21 +1,42 @@
 //! Game board logic.
 
+use std::fs::read_to_string;
+
 const SIZE: usize = 9;
 
+#[derive(Clone, Copy, Debug, Default, PartialEq)]
+pub struct Cell {
+    pub value: u8,
+    pub loaded: bool,
+}
+
 #[derive(Debug, PartialEq)]
 pub struct Gameboard {
-    pub cells: [[u8; SIZE]; SIZE],
+    pub cells: [[Cell; SIZE]; SIZE],
 }
 
 impl Gameboard {
     pub fn new() -> Gameboard {
         Gameboard {
-            cells: [[0; SIZE]; SIZE],
+            cells: [[Cell::default(); SIZE]; SIZE],
         }
     }
 
+    pub fn from_cells(cells: [[u8; SIZE]; SIZE]) -> Gameboard {
+        let mut ret = Gameboard::new();
+        for (i, row) in cells.iter().enumerate() {
+            for (j, &col) in row.iter().enumerate() {
+                ret.cells[i][j] = Cell {
+                    value: col,
+                    loaded: col != 0,
+                };
+            }
+        }
+        ret
+    }
+
     pub fn char(&self, ind: [usize; 2]) -> Option<char> {
-        Some(match self.cells[ind[1]][ind[0]] {
+        Some(match self.cells[ind[1]][ind[0]].value {
             1 => '1',
             2 => '2',
             3 => '3',
@@ -30,14 +51,14 @@ impl Gameboard {
     }
 
     pub fn set(&mut self, ind: [usize; 2], val: u8) {
-        self.cells[ind[1]][ind[0]] = val;
+        if !self.cells[ind[1]][ind[0]].loaded {
+            self.cells[ind[1]][ind[0]].value = val;
+        }
     }
 
     pub fn load_sdm(filename: &str) -> Self {
-        use std::fs::read_to_string;
-
         let data = read_to_string(filename).expect("failed to read SDM file");
-        let mut cells = [[0; SIZE]; SIZE];
+        let mut cells = [[Cell::default(); SIZE]; SIZE];
         let mut row = 0;
         let mut col = 0;
         for c in data.chars() {
@@ -45,8 +66,12 @@ impl Gameboard {
                 col = 0;
                 row += 1;
             }
-            if let Some(d) = c.to_digit(10) {
-                cells[row][col] = d as u8;
+            if let Some(v) = c.to_digit(10) {
+                let value = v as u8;
+                cells[row][col] = Cell {
+                    value,
+                    loaded: value != 0,
+                };
                 col += 1;
             }
         }
@@ -62,8 +87,7 @@ mod tests {
     #[test]
     fn load_sdm() {
         let got = Gameboard::load_sdm("static/puzzle.sdm");
-        let want = Gameboard {
-            cells: [
+        let want = Gameboard::from_cells([
             [0, 1, 6, 4, 0, 0, 0, 0, 0],
             [2, 0, 0, 0, 0, 9, 0, 0, 0],
             [4, 0, 0, 0, 0, 0, 0, 6, 2],
@@ -73,8 +97,7 @@ mod tests {
             [9, 6, 0, 0, 0, 0, 0, 0, 5],
             [0, 0, 0, 8, 0, 0, 0, 0, 7],
             [0, 0, 0, 0, 0, 6, 8, 2, 0],
-            ],
-        };
+        ]);
         assert_eq!(got, want);
     }
 }

piston-tutorials/sudoku/src/gameboard_view.rs

@@ -19,6 +19,7 @@ pub struct GameboardViewSettings {
     pub cell_edge_radius: f64,
     pub selected_cell_background_color: Color,
     pub text_color: Color,
+    pub loaded_cell_background_color: Color,
 }
 
 impl GameboardViewSettings {
@@ -36,6 +37,7 @@ impl GameboardViewSettings {
             cell_edge_radius: 1.0,
             selected_cell_background_color: [0.9, 0.9, 1.0, 1.0],
             text_color: [0.0, 0.0, 0.1, 1.0],
+            loaded_cell_background_color: [1.0, 1.0, 1.0, 1.0],
         }
     }
 }
@@ -70,22 +72,28 @@ impl GameboardView {
 
         Rectangle::new(settings.background_color).draw(board_rect, &c.draw_state, c.transform, g);
 
-        if let Some(ind) = controller.selected_cell {
-            let cell_size = settings.size / 9.0;
-            let pos = [ind[0] as f64 * cell_size, ind[1] as f64 * cell_size];
-            let cell_rect = [
-                settings.position[0] + pos[0],
-                settings.position[1] + pos[1],
-                cell_size,
-                cell_size,
-            ];
-            Rectangle::new(settings.selected_cell_background_color).draw(
-                cell_rect,
-                &c.draw_state,
-                c.transform,
+        for i in 0..9 {
+            for j in 0..9 {
+                if controller.gameboard.cells[i][j].loaded {
+                    color_cell(
+                        settings,
+                        [j, i],
+                        settings.loaded_cell_background_color,
+                        c,
                         g,
                     );
                 }
+            }
+        }
+
+        if let Some(ind) = controller.selected_cell {
+            let color = if !controller.gameboard.cells[ind[1]][ind[0]].loaded {
+                settings.selected_cell_background_color
+            } else {
+                settings.loaded_cell_background_color
+            };
+            color_cell(settings, ind, color, c, g);
+        }
 
         let text_image = Image::new_color(settings.text_color);
         let cell_size = settings.size / 9.0;
@@ -147,3 +155,23 @@ impl GameboardView {
         );
     }
 }
+
+fn color_cell<G: Graphics>(
+    settings: &GameboardViewSettings,
+    ind: [usize; 2],
+    color: [f32; 4],
+    c: &Context,
+    g: &mut G,
+) {
+    use graphics::Rectangle;
+
+    let cell_size = settings.size / 9.0;
+    let pos = [ind[0] as f64 * cell_size, ind[1] as f64 * cell_size];
+    let cell_rect = [
+        settings.position[0] + pos[0],
+        settings.position[1] + pos[1],
+        cell_size,
+        cell_size,
+    ];
+    Rectangle::new(color).draw(cell_rect, &c.draw_state, c.transform, g);
+}

piston-tutorials/sudoku/src/main.rs

@@ -27,7 +27,7 @@ fn main() {
     let mut events = Events::new(EventSettings::new().lazy(true));
     let mut gl = GlGraphics::new(opengl);
 
-    let gameboard = Gameboard::new();
+    let gameboard = Gameboard::load_sdm("static/puzzle.sdm");
     let mut gameboard_controller = GameboardController::new(gameboard);
     let gameboard_view_settings = GameboardViewSettings::new();
     let gameboard_view = GameboardView::new(gameboard_view_settings);