From 5deb609663f426a8f38710a3156be6ba8b91d77d Mon Sep 17 00:00:00 2001
From: Martin Putzlocher <m.putzlocher@stiftland-gymnasium.de>
Date: Wed, 1 Dec 2021 15:26:22 +0100
Subject: [PATCH] Stoppuhr

---
 tk_first_steps/stopwatch.py | 103 ++++++++++++++++++++++++++++++++++++
 1 file changed, 103 insertions(+)
 create mode 100644 tk_first_steps/stopwatch.py

diff --git a/tk_first_steps/stopwatch.py b/tk_first_steps/stopwatch.py
new file mode 100644
index 0000000..9088cd9
--- /dev/null
+++ b/tk_first_steps/stopwatch.py
@@ -0,0 +1,103 @@
+#!/usr/bin/env python3
+from tkinter import *
+from tkinter import ttk
+from time import time
+
+# --------------------------
+# Model
+# --------------------------
+class StopWatch:
+    def __init__(self):
+        self.seconds = 0.00
+        self.starttime = 0.00
+        self.running = False
+    
+    def switch(self):
+        if not self.running:
+            self.start()
+        else:
+            self.stop()
+        return self.running
+
+    def start(self):
+        self.starttime = time()
+        self.running = True
+            
+    def stop(self):
+        self.seconds = time() - self.starttime
+        self.running = False
+            
+    def print_status(self):
+        if self.running:
+            print("Uhr läuft.")
+        else:
+            print("Uhr angehalten.")
+        
+    def get_time(self):
+        if not self.running:
+            return self.seconds
+        else:
+            return False
+    
+# --------------------------
+# Controller
+# --------------------------
+class WatchController:
+    def __init__(self, app):
+        self.app = app
+        self.sw = StopWatch()
+        
+    def switch_clock(self, event=None):
+        running = self.sw.switch()
+        if running:
+            stoppedtime = 0
+        else:
+            stoppedtime = self.sw.get_time()
+        self.update_view(running, self.sw.get_time())
+        
+    def update_view(self, running, stoppedtime):
+        self.app.update(running, stoppedtime)
+
+# --------------------------
+# View / Main Application
+# --------------------------
+class StopWatch_App(Tk):
+    def __init__(self):
+        super().__init__()
+        self.controller = WatchController(self)
+        self.create_widgets()
+        self.bind_events()
+        
+    def create_control_variables(self):
+        self.btext = StringVar()
+        self.btext.set("Start")
+        self.etext = StringVar()
+        self.etext.set("0.00")
+        
+    def create_widgets(self):
+        mainframe = ttk.Frame(self, padding="3 3 3 3")
+        mainframe.grid(column=0, row=0, sticky=N+W+S+E)
+        self.columnconfigure(0, weight=1)
+        self.rowconfigure(0, weight=1)
+        self.button_switch = ttk.Button(mainframe, textvariable=self.btext, command=self.controller.switch_clock)
+        self.button_switch.grid(column=0, row=0, sticky=W)
+        self.entry_time = ttk.Entry(mainframe, state="readonly", textvariable=self.etext)
+        self.entry_time.grid(column=1, row=0, sticky=W)
+        
+    def bind_events(self):
+        self.bind("<Return>", self.controller.switch_clock)
+    
+    def update(self, running, stoppedtime):
+        if running:
+            self.btext.set("Stopp")
+            self.etext.set("running...")
+        else:
+            self.etext.set("{:2.3f}".format(stoppedtime))
+            self.btext.set("Start")
+        
+# --------------------------
+# Execution
+# --------------------------
+if __name__ == "__main__":
+    app = StopWatch_App()
+    app.mainloop()