Initial screensaver support

menu.py

@@ -4,7 +4,7 @@ import math
 import argparse
 import json
 from enum import Enum, auto
-from time import sleep
+from time import sleep, strftime
 from threading import Thread
 from queue import Queue, Empty
 from abc import abstractmethod
@@ -41,6 +41,26 @@ class IBoard:
         raise NotImplementedError()
 
 
+class Screensaver(IBoard):
+    def handle_event(self, _):
+        pass
+
+
+class ClockScreensaver(Screensaver):
+    def __init__(self):
+        self.font = pygame.freetype.SysFont(name="Sans", size=20)
+
+    def draw(self, screen: pygame.Surface):
+        text = strftime("%H:%M:%S")
+        screen.fill("black")
+        pygame.Rect(0, 0, screen.get_width(), screen.get_height())
+        text_rect = self.font.get_rect(text)
+        text_pos = pygame.Rect((screen.get_width() - text_rect.width)/2,
+                               (screen.get_height() - text_rect.height)/2,
+                               text_rect.width, text_rect.height)
+        self.font.render_to(screen, text_pos, text, fgcolor="pink")
+
+
 class Button:
     PRESS_OFFSET = 2
 
@@ -140,6 +160,9 @@ class MenuBoard(IBoard):
 
 
 class App:
+    FPS = 30
+    TICKS_UNTIL_SCREENSAVER = 1 * FPS
+
     def __init__(self, urls: List[Action], bg_color: str):
         pygame.init()
         info = pygame.display.Info()
@@ -151,6 +174,8 @@ class App:
         buttons.append(ButtonDef(text="Exit", cbk=self.quit))
         self.board: IBoard = MenuBoard(self.get_screen_rect(), buttons, bg_color)
         self.task_q = Queue()
+        self.screensaver = ClockScreensaver()
+        self.screensaver_ticks = self.TICKS_UNTIL_SCREENSAVER
 
     def get_screen_rect(self) -> pygame.Rect:
         return pygame.Rect(0, 0, self.screen.get_width(), self.screen.get_height())
@@ -205,13 +230,19 @@ class App:
             for event in pygame.event.get():
                 if event.type == pygame.QUIT:
                     self.running = False
-                self.board.handle_event(event)
+                if self.screensaver_ticks != 0:
+                    self.board.handle_event(event)
+                self.screensaver_ticks = self.TICKS_UNTIL_SCREENSAVER
 
-            self.board.draw(self.screen)
+            if self.screensaver_ticks == 0:
+                self.screensaver.draw(self.screen)
+            else:
+                self.board.draw(self.screen)
+                self.screensaver_ticks -= 1
 
             pygame.display.flip()
 
-            self.clock.tick(30)
+            self.clock.tick(self.FPS)
         pygame.quit()
 
     def quit(self):