adding more examples

Author: trevorwslee

dumbdisplay_examples/tetris/tetris_common.py

@@ -0,0 +1,66 @@
+from dumbdisplay.layer_turtle import LayerTurtle
+
+
+_width = 400
+_height = 700
+_top = 230
+_left = -110
+_block_unit_width = 20
+#_colors = ['black', 'red', 'lightblue', 'blue', 'orange', 'yellow', 'green', 'purple']
+_colors = ['black', 'crimson', 'cyan', 'ivory', 'coral', 'gold', 'lime', 'magenta']
+
+_grid_n_cols = 12
+_grid_n_rows = 24
+
+
+class Grid:
+    def __init__(self, grid_cells):
+        self.grid_cells = grid_cells
+        self.grid_dirty = []
+        for grid_row in self.grid_cells:
+            grid_dirty_row = []
+            for cell in grid_row:
+                dirty = True if cell != 0 else False
+                grid_dirty_row.append(dirty)
+            self.grid_dirty.append(grid_dirty_row)
+        self.n_cols = len(self.grid_cells[0])
+        self.n_rows = len(self.grid_cells)
+
+    def check_reset_need_redraw(self, row_idx, col_idx):
+        dirty = self.grid_dirty[row_idx][col_idx]
+        if not dirty:
+            return False
+        self.grid_dirty[row_idx][col_idx] = False
+        return True
+
+    def get_value(self, row_idx, col_idx):
+        return self.grid_cells[row_idx][col_idx]
+
+    def set_value(self, row_idx, col_idx, value):
+        if self.grid_cells[row_idx][col_idx] != value:
+            self.grid_cells[row_idx][col_idx] = value
+            self.grid_dirty[row_idx][col_idx] = True
+
+
+def _draw(x, y, color_number, pen: LayerTurtle):
+    screen_x = _left + (x * _block_unit_width) # each turtle 20x20 pixels
+    screen_y = _top - (y * _block_unit_width)
+    # (screen_x, screen_y) = _calc_screen_position(x, y)
+    color = _colors[color_number]
+    pen.penColor(color)
+    pen.goTo(screen_x, screen_y, with_pen=False)
+    pen.rectangle(_block_unit_width - 2, _block_unit_width - 2, centered=True)
+
+# def _draw_block(block: 'Block', block_pen: LayerTurtle):
+#     block_pen.clear()
+#     _draw(block.x, block.y, block.color, block_pen)
+
+def _draw_grid(grid: Grid, pen: LayerTurtle):
+    for y in range(grid.n_rows):
+        for x in range(grid.n_cols):
+            if not grid.check_reset_need_redraw(y, x):
+                continue
+            color_number = grid.get_value(y, x)
+            _draw(x, y, color_number, pen)
+
+