Informatik10/tk_first_steps/two_lights_simple_mvc.py

100 lines
2.9 KiB
Python
Raw Normal View History

2021-12-01 12:01:28 +00:00
#!/usr/bin/env python3
from tkinter import *
from tkinter import ttk
# --------------------------
# Model
# --------------------------
class DoubleLight:
def __init__(self):
self.l1 = 1
self.l2 = 0
def switch(self):
if self.l1 == 1:
self.set_l2()
else:
self.set_l1()
def set_l1(self):
self.l1 = 1
self.l2 = 0
def set_l2(self):
self.l1 = 0
self.l2 = 1
def print_status(self):
print("l1: " + str(self.l1) + "| l2: " + str(self.l2))
def get_active(self):
if self.l1 == 1:
return 1
else:
return 2
# --------------------------
# Controller
# --------------------------
class TwoLightsController:
def __init__(self, app):
self.app = app
self.lights = DoubleLight()
def switch_lights(self, event=None):
self.lights.switch()
self.update_view()
def update_view(self):
active_light = self.lights.get_active()
self.app.change_light_display(active_light)
# --------------------------
# View / Main Application
# --------------------------
class TwoLightsApp(Tk):
def __init__(self):
super().__init__()
self.controller = TwoLightsController(self)
self.color1 = "dark green"
self.color2 = "green yellow"
self.create_widgets()
self.create_lights(self.color1)
self.bind_events()
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)
button_switch = ttk.Button(mainframe, text="Schalte um", command=self.controller.switch_lights)
button_switch.grid(column=0, row=0, sticky=W)
light_canvas = Canvas(mainframe, width=50, height=50, background="black")
light_canvas.grid(column=1, row=0, sticky=W)
self.lc = light_canvas
def create_lights(self, color="dark green"):
self.light1 = self.lc.create_rectangle(5,5,25,45,fill=color)
self.light2 = self.lc.create_rectangle(25,5,45,45,fill=color)
self.controller.update_view()
def bind_events(self):
self.bind("<Return>", self.controller.switch_lights)
def change_light_display(self, active_light):
if active_light == 1:
self.lc.itemconfig(self.light1, fill=self.color2)
self.lc.itemconfig(self.light2, fill=self.color1)
else:
self.lc.itemconfig(self.light1, fill=self.color1)
self.lc.itemconfig(self.light2, fill=self.color2)
# --------------------------
# Execution
# --------------------------
if __name__ == "__main__":
app = TwoLightsApp()
app.mainloop()