運行過程中的畫布更新

Question

master = Tk() 

canvas_width = 100 
canvas_height = 250 
w = Canvas(master, 
      width=canvas_width, 
      height=canvas_height) 
w.pack() 

class Tetriminos(object): 

    def __init__(self, position, pivot, color): 
     self.position = position 
     self.pivot = pivot 
     self.color = color 

    def left_shift(self): 
     backup = copy.copy(self.position) 
     for i in range(len(self.position)): 
      change = str(int(self.position[i][0]) - 1) + self.position[i][1:] 
      if "-" in change: 
       self.position = backup 
       return False 
      for j in self.position: 
       if "0" in self.position: 
        self.position = backup 
        return False 
      self.position[i] = change 
     self.pivot[0] -=1 

    def right_shift(self): 
     backup = copy.copy(self.position) 
     for i in range(len(self.position)): 
      change = str(int(self.position[i][0]) + 1) + self.position[i][1:] 
      if "0" in change: 
       self.position = backup 
       return False 
      self.position[i] = change 
     self.pivot[0] += 1 

    def rotate(self): #direction? 
     for i in range(len(self.position)): 
      a = int(self.position[i][0]) - self.pivot[0] 
      b = int(self.position[i][1:]) - self.pivot[1] 
      a, b = a*0 + b*(-1), a*1 + b*0 
      a += self.pivot[0] 
      b += self.pivot[1] 
      if a >= 0 and b >= 0: 
       self.position[i] = str(a) + str(b) 
      else: 
       pass 

    def drop(self): 
     pass 

    def slow_drop(self): 
     for i in range(len(self.position)): 
      change = self.position[i][0] + str(int(self.position[i][1:]) + 1) 
      if int(change[1:]) < 26: #and no other tetrimino is in the way... 
       self.position[i] = change 
      else: 
       return False 
     self.pivot[1] += 1 

    def draw(self): 
     for i in range(len(self.position)): 
      a = int(self.position[i][0])*10 
      b = (int(self.position[i][1:])-1)*10 #Das Koordinatensystem ist gedreht!! 
      c = (int(self.position[i][0])+1)*10 
      d = (int(self.position[i][1:]))*10 

      w.create_rectangle(a, b, c, d, fill=self.color) 
      w.create_rectangle(a, b, c, d, fill=self.color) 
      w.create_rectangle(a, b, c, d, fill=self.color) 
      w.create_rectangle(a, b, c, d, fill=self.color) 


tetrimino1 = Tetriminos(["302", "402", "502", "602"], [4, 2], "green") 

tetrimino2 = Tetriminos(["402", "502", "401", "501"], [5, 1], "grey") 

tetrimino3 = Tetriminos(["302", "402", "502", "401"], [4.5, 1.5], "yellow") 

tetrimino4 = Tetriminos(["302", "402", "502", "301"], [4.5, 1.5], "blue") 

tetrimino5 = Tetriminos(["302", "402", "502", "501"], [4.5, 1.5], "red") 

tetrimino6 = Tetriminos(["302", "402", "401", "501"], [4, 1], "white") 

tetrimino7 = Tetriminos(["402", "502", "301", "401"], [5, 1], "orange") 

tetrimino_list = [tetrimino1, tetrimino2, tetrimino3, tetrimino4,tetrimino5, 
       tetrimino6, tetrimino7] 

settled_tetriminos = [] 

def draw(): 
    w.delete(ALL) 
    current.draw() 
    for t in settled_tetriminos: 
     t.draw 
     w.update_idletasks() 
    time.sleep(0.1) 
    current.slow_drop() 
    print(current.position) 
    if int(current.position[1][1:]) == 25: 
     w.delete(ALL) 
     current.draw() 
     w.update_idletasks() 
     settled_tetriminos.append(current) 
     return False 
    w.delete(ALL) 
    current.draw() 
    for t in settled_tetriminos: 
     t.draw 
    w.update_idletasks() 
    w.after(100, draw) 

current = random.choice(tetrimino_list) 
draw() 

class App: 
    def __init__(self, master): 
     frame = Frame(master) 
     frame.pack() 
     self.button = Button(frame, 
         text="Left", fg="red", 
         command=self.left()) 
     self.button.pack(side=LEFT) 
     self.button2 = Button(frame, 
         text="Right", fg="red", 
         command=self.right()) 
     self.button2.pack(side=RIGHT) 
    def left(self): 
     print("dsdsd") 
     current.left_shift() 
     current.draw() 
    def right(self): 
     print("ffff") 
     current.right_shift() 
     current.draw() 

mainloop() 

好吧，它現在的作品。但只限於一件。如果我使用任何while循環或遞歸函數，它不會如你所說。但是我怎麼能避免循環，如果我想每次都得到新的tetriminos，最近的一個已經解決了？如果我使用遞歸，否則它在內部工作，但不會顯示在畫布上。

或者你可以告訴我爲什麼這個按鈕不起作用。它只是自動執行這兩個方法，然後我再也不能進行交互了。按鈕已經死了。 你認爲可以這樣編程俄羅斯方塊，還是我需要從根本上改變一些東西？

Answer 1

很難確定發生了什麼事情，因爲您發佈的代碼缺少一些重要的代碼位。

這就是說，但是，邏輯看起來很棘手。例如，drawdraw有一個無限循環，您不應該在GUI中使用該循環。 drawdraw調用draw和draw調用drawdraw，這意味着可能在無限循環內運行無限循環。

您似乎可能已經設置了系統從未有機會自行繪製的情況。

最好的解決方案是刪除你的無限循環，並刪除遞歸。在Tkinter中都不需要做動畫。