feat: menu demo

menu.py

@@ -0,0 +1,76 @@
+from this import d
+
+from ili9341 import Display, color565
+
+
+class MenuItem:
+    def __init__(self, name: str, navigate: str):
+        self.name = name
+        self.navigate = navigate
+
+
+class MenuPage:
+    UP = 0
+    DOWN = 1
+
+    def __init__(self, title: str, item: list[MenuItem]):
+        self.title = title
+        self.items = item
+        self.items.append(MenuItem("Back", "Root"))
+        self.cursor = 0
+
+    def size(self) -> int:
+        return len(self.items)
+
+    def move(self, direction: int):
+        match direction:
+            case self.UP:
+                self.cursor = (self.cursor + 1) % self.size()
+            case self.DOWN:
+                self.cursor = (self.cursor - 1) % self.size()
+
+    def draw(self) -> str:
+
+        lines: list[str] = []
+
+        for i, item in enumerate(self.items):
+            if i == self.cursor:
+                lines.append("> {item.name}\n")
+            else:
+                lines.append(" {item.name}\n")
+
+        return "\n".join(lines)
+
+    def current_at_cursor(self, cursor: int) -> MenuItem:
+        return self.items[cursor]
+
+
+class DisplayMenu:
+    def __init__(self, display: Display, pages: list[MenuPage]):
+        self.display = display
+        self.pages = pages
+        self.cursor = 0
+        self.current_page = self.pages[0]
+        self.update()
+
+    def __draw_display_line(self, line: str, offset: int):
+        self.display.draw_text8x8(
+            10,
+            10 + (offset * 8),
+            line,
+            color565(255, 255, 255),
+            color565(0, 0, 0),
+        )
+
+    def move_up(self):
+        self.current_page.move(MenuPage.UP)
+
+    def move_down(self):
+        self.current_page.move(MenuPage.DOWN)
+
+    def select(self):
+        pass
+
+    def update(self):
+        self.__draw_display_line(self.current_page.title, 0)
+        self.__draw_display_line(self.current_page.draw(), 2)