Tkinter 和 Turtle 蚀刻素描
Tkinter & Turtle Etch-a-Sketch
我一直致力于制作一个类似于蚀刻素描的程序，您可以在其中使用箭头键进行绘图。我注意到我不能像向上和向左箭头键那样按住两个键来穿过屏幕。这可能吗？我该怎么做？
到目前为止，这是我的代码：
import tkinter as tk
import turtle
def k1(event):
t.forward(1)
def k2(event):
t.left(1)
def k3(event):
t.right(1)
def k4(event):
t.back(1)
window = tk.Tk()
window.geometry("750x500")
window.resizable(False, False)
canvas = tk.Canvas(master=window, width=500, height=500, bg="white")
canvas.pack()
t = turtle.RawTurtle(canvas)
window.bind("<Up>", k1)
window.bind("<Left>", k2)
window.bind("<Right>", k3)
window.bind("<Down>", k4)
window.mainloop()
通过将 Josselin on this post Press 2 keys at once to move diagonally tkinter? 使用的方法与您的乌龟相结合，我们可以捕获何时按下多个键以及如何处理。
此代码允许您一次按下多个键以至少获得一个旋转动作。
import tkinter as tk
import turtle
window = tk.Tk()
window.geometry("750x500")
window.resizable(False, False)
pressedStatus = {"Up": False, "Down": False, "Left": False, "Right": False}
canvas = tk.Canvas(master=window, width=500, height=500, bg="white")
canvas.pack()
t = turtle.RawTurtle(canvas)
def pressed(event):
pressedStatus[event.keysym] = True
def released(event):
pressedStatus[event.keysym] = False
def set_bindings():
for char in ["Up", "Down", "Left", "Right"]:
window.bind("<KeyPress-%s>" % char, pressed)
window.bind("<KeyRelease-%s>" % char, released)
def animate():
if pressedStatus["Up"]: t.forward(1)
if pressedStatus["Down"]: t.back(1)
if pressedStatus["Left"]: t.left(1)
if pressedStatus["Right"]: t.right(1)
canvas.update()
window.after(10, animate)
set_bindings()
animate()
window.mainloop()
通过多一点工作和另一个字典来跟踪旋转，我们可以获得您想要的任何度数的对角线。我假设 45 度是目标，所以试试下面的方法。
import tkinter as tk
import turtle
window = tk.Tk()
window.geometry("750x500")
window.resizable(False, False)
pressed_status = {"Up": False, "Down": False, "Left": False, "Right": False}
rotation_lock = {"Left": False, "Right": False} # use to lock the rotation event so we cont constantly rotate.
canvas = tk.Canvas(master=window, width=500, height=500, bg="white")
canvas.pack()
t = turtle.RawTurtle(canvas)
def pressed(event):
pressed_status[event.keysym] = True
def released(event):
pressed_status[event.keysym] = False
if event.keysym == 'Left' or event.keysym == 'Right':
rotation_lock[event.keysym] = False
def set_bindings():
for char in ["Up", "Down", "Left", "Right"]:
window.bind("<KeyPress-%s>" % char, pressed)
window.bind("<KeyRelease-%s>" % char, released)
def animate():
# By first checking if 2 keys are pressed we can make sure we get the rotation we are looking for.
# Then if not 2 keys then process single keys.
# We also want to lock the rotation after our first rotation as to not constantly turn at a 45 degree angle.
if pressed_status["Up"] and pressed_status["Left"]:
t.forward(1)
if not rotation_lock['Left']:
rotation_lock['Left'] = True
t.left(45)
elif pressed_status["Up"] and pressed_status["Right"]:
t.forward(1)
t.right(1)
if not rotation_lock['Right']:
rotation_lock['Right'] = True
t.right(45)
elif pressed_status["Down"] and pressed_status["Left"]:
t.back(1)
if not rotation_lock['Left']:
rotation_lock['Left'] = True
t.left(45)
elif pressed_status["Down"] and pressed_status["Right"]:
t.back(1)
if not rotation_lock['Right']:
rotation_lock['Right'] = True
t.right(45)
elif pressed_status["Up"]: t.forward(1)
elif pressed_status["Down"]: t.back(1)
elif pressed_status["Left"]: t.left(1)
elif pressed_status["Right"]: t.right(1)
canvas.update()
window.after(40, animate)
set_bindings()
animate()
window.mainloop()
如果我们添加第 3 个键，我们可以选择在对角线和曲线之间切换。
看看这个例子：
import tkinter as tk
import turtle
window = tk.Tk()
window.geometry("750x500")
window.resizable(False, False)
pressed_status = {"Up": False, "Down": False, "Left": False, "Right": False, "Control_L": False}
rotation_lock = {"Left": False, "Right": False} # use to lock the rotation event so we cont constantly rotate.
canvas = tk.Canvas(master=window, width=500, height=500, bg="white")
canvas.pack()
t = turtle.RawTurtle(canvas)
def pressed(event):
pressed_status[event.keysym] = True
def released(event):
pressed_status[event.keysym] = False
if event.keysym == 'Left' or event.keysym == 'Right':
rotation_lock[event.keysym] = False
def set_bindings():
for char in ["Up", "Down", "Left", "Right", "Control_L"]:
window.bind("<KeyPress-%s>" % char, pressed)
window.bind("<KeyRelease-%s>" % char, released)
def animate():
# By first checking if 2 keys are pressed we can make sure we get the rotation we are looking for.
# Then if not 2 keys then process single keys.
# We also want to lock the rotation after our first rotation as to not constantly turn at a 45 degree angle.
if pressed_status["Up"] and pressed_status["Left"]:
t.forward(1)
if pressed_status["Control_L"]:
t.left(1)
else:
if not rotation_lock['Left']:
rotation_lock['Left'] = True
t.left(45)
elif pressed_status["Up"] and pressed_status["Right"]:
t.forward(1)
if pressed_status["Control_L"]:
t.right(1)
else:
if not rotation_lock['Right']:
rotation_lock['Right'] = True
t.right(45)
elif pressed_status["Down"] and pressed_status["Left"]:
t.back(1)
if pressed_status["Control_L"]:
t.left(1)
else:
if not rotation_lock['Left']:
rotation_lock['Left'] = True
t.left(45)
elif pressed_status["Down"] and pressed_status["Right"]:
t.back(1)
if pressed_status["Control_L"]:
t.right(1)
else:
if not rotation_lock['Right']:
rotation_lock['Right'] = True
t.right(45)
elif pressed_status["Up"]: t.forward(1)
elif pressed_status["Down"]: t.back(1)
elif pressed_status["Left"]: t.left(1)
elif pressed_status["Right"]: t.right(1)
canvas.update()
window.after(40, animate)
set_bindings()
animate()
window.mainloop()
我一直致力于制作一个类似于蚀刻素描的程序，您可以在其中使用箭头键进行绘图。我注意到我不能像向上和向左箭头键那样按住两个键来穿过屏幕。这可能吗？我该怎么做？
到目前为止，这是我的代码：
import tkinter as tk
import turtle
def k1(event):
t.forward(1)
def k2(event):
t.left(1)
def k3(event):
t.right(1)
def k4(event):
t.back(1)
window = tk.Tk()
window.geometry("750x500")
window.resizable(False, False)
canvas = tk.Canvas(master=window, width=500, height=500, bg="white")
canvas.pack()
t = turtle.RawTurtle(canvas)
window.bind("<Up>", k1)
window.bind("<Left>", k2)
window.bind("<Right>", k3)
window.bind("<Down>", k4)
window.mainloop()
通过将 Josselin on this post Press 2 keys at once to move diagonally tkinter? 使用的方法与您的乌龟相结合，我们可以捕获何时按下多个键以及如何处理。
此代码允许您一次按下多个键以至少获得一个旋转动作。
import tkinter as tk
import turtle
window = tk.Tk()
window.geometry("750x500")
window.resizable(False, False)
pressedStatus = {"Up": False, "Down": False, "Left": False, "Right": False}
canvas = tk.Canvas(master=window, width=500, height=500, bg="white")
canvas.pack()
t = turtle.RawTurtle(canvas)
def pressed(event):
pressedStatus[event.keysym] = True
def released(event):
pressedStatus[event.keysym] = False
def set_bindings():
for char in ["Up", "Down", "Left", "Right"]:
window.bind("<KeyPress-%s>" % char, pressed)
window.bind("<KeyRelease-%s>" % char, released)
def animate():
if pressedStatus["Up"]: t.forward(1)
if pressedStatus["Down"]: t.back(1)
if pressedStatus["Left"]: t.left(1)
if pressedStatus["Right"]: t.right(1)
canvas.update()
window.after(10, animate)
set_bindings()
animate()
window.mainloop()
通过多一点工作和另一个字典来跟踪旋转，我们可以获得您想要的任何度数的对角线。我假设 45 度是目标，所以试试下面的方法。
import tkinter as tk
import turtle
window = tk.Tk()
window.geometry("750x500")
window.resizable(False, False)
pressed_status = {"Up": False, "Down": False, "Left": False, "Right": False}
rotation_lock = {"Left": False, "Right": False} # use to lock the rotation event so we cont constantly rotate.
canvas = tk.Canvas(master=window, width=500, height=500, bg="white")
canvas.pack()
t = turtle.RawTurtle(canvas)
def pressed(event):
pressed_status[event.keysym] = True
def released(event):
pressed_status[event.keysym] = False
if event.keysym == 'Left' or event.keysym == 'Right':
rotation_lock[event.keysym] = False
def set_bindings():
for char in ["Up", "Down", "Left", "Right"]:
window.bind("<KeyPress-%s>" % char, pressed)
window.bind("<KeyRelease-%s>" % char, released)
def animate():
# By first checking if 2 keys are pressed we can make sure we get the rotation we are looking for.
# Then if not 2 keys then process single keys.
# We also want to lock the rotation after our first rotation as to not constantly turn at a 45 degree angle.
if pressed_status["Up"] and pressed_status["Left"]:
t.forward(1)
if not rotation_lock['Left']:
rotation_lock['Left'] = True
t.left(45)
elif pressed_status["Up"] and pressed_status["Right"]:
t.forward(1)
t.right(1)
if not rotation_lock['Right']:
rotation_lock['Right'] = True
t.right(45)
elif pressed_status["Down"] and pressed_status["Left"]:
t.back(1)
if not rotation_lock['Left']:
rotation_lock['Left'] = True
t.left(45)
elif pressed_status["Down"] and pressed_status["Right"]:
t.back(1)
if not rotation_lock['Right']:
rotation_lock['Right'] = True
t.right(45)
elif pressed_status["Up"]: t.forward(1)
elif pressed_status["Down"]: t.back(1)
elif pressed_status["Left"]: t.left(1)
elif pressed_status["Right"]: t.right(1)
canvas.update()
window.after(40, animate)
set_bindings()
animate()
window.mainloop()
如果我们添加第 3 个键，我们可以选择在对角线和曲线之间切换。
看看这个例子：
import tkinter as tk
import turtle
window = tk.Tk()
window.geometry("750x500")
window.resizable(False, False)
pressed_status = {"Up": False, "Down": False, "Left": False, "Right": False, "Control_L": False}
rotation_lock = {"Left": False, "Right": False} # use to lock the rotation event so we cont constantly rotate.
canvas = tk.Canvas(master=window, width=500, height=500, bg="white")
canvas.pack()
t = turtle.RawTurtle(canvas)
def pressed(event):
pressed_status[event.keysym] = True
def released(event):
pressed_status[event.keysym] = False
if event.keysym == 'Left' or event.keysym == 'Right':
rotation_lock[event.keysym] = False
def set_bindings():
for char in ["Up", "Down", "Left", "Right", "Control_L"]:
window.bind("<KeyPress-%s>" % char, pressed)
window.bind("<KeyRelease-%s>" % char, released)
def animate():
# By first checking if 2 keys are pressed we can make sure we get the rotation we are looking for.
# Then if not 2 keys then process single keys.
# We also want to lock the rotation after our first rotation as to not constantly turn at a 45 degree angle.
if pressed_status["Up"] and pressed_status["Left"]:
t.forward(1)
if pressed_status["Control_L"]:
t.left(1)
else:
if not rotation_lock['Left']:
rotation_lock['Left'] = True
t.left(45)
elif pressed_status["Up"] and pressed_status["Right"]:
t.forward(1)
if pressed_status["Control_L"]:
t.right(1)
else:
if not rotation_lock['Right']:
rotation_lock['Right'] = True
t.right(45)
elif pressed_status["Down"] and pressed_status["Left"]:
t.back(1)
if pressed_status["Control_L"]:
t.left(1)
else:
if not rotation_lock['Left']:
rotation_lock['Left'] = True
t.left(45)
elif pressed_status["Down"] and pressed_status["Right"]:
t.back(1)
if pressed_status["Control_L"]:
t.right(1)
else:
if not rotation_lock['Right']:
rotation_lock['Right'] = True
t.right(45)
elif pressed_status["Up"]: t.forward(1)
elif pressed_status["Down"]: t.back(1)
elif pressed_status["Left"]: t.left(1)
elif pressed_status["Right"]: t.right(1)
canvas.update()
window.after(40, animate)
set_bindings()
animate()
window.mainloop()