我第一次在 Python 中使用 tkinter 创建了一个 GUI。我使用过 wxPython 并没有遇到同样的问题,但我从未使用过画布。画布背后的思考过程是最终添加动画。我创建了一个网格布局,其中一个网格是画布。我正在尝试使用 itemconfig 更新分数字段,但没有让两个分数字段在画布上更新。我的代码如下。关于如何更新画布上的两个分数的任何建议?我希望在将新分数写入屏幕之前删除旧分数。谢谢参观。原谅全局变量,随着过程的进行,它们将被删除。
class Gui(Frame):
def __init__(self, root):
self.root=root
self.initUI()
def initUI(self):
global score1, score2 # these are ints
score1str = str(score1)
score2str = str(score2)
root.title("Table Tennis Scoreboard")
self.canvas = Canvas(root, width=640, height=480, background='green')
self.canvas.grid(row=0,column=1)
self.canvas.create_text(185, 90, anchor=W, font=('Calibri', 20),
text="Let's play Table Tennis!")
self.canvas.create_rectangle(75, 120, 275, 320, outline="red", fill="red")
self.canvas.create_rectangle(370, 120, 565, 320, outline="blue", fill="blue")
self.canvas.create_text(125, 130, anchor=W, font=('Calibri', 20),
text="Player 1")
self.canvas.create_text(425, 130, anchor=W, font=('Calibri', 20),
text="Player 2")
self.score1_id = self.canvas.create_text(135, 250, anchor=W, font=('Arial', 100),
text=score1str)
self.score2_id = self.canvas.create_text(435, 250, anchor=W, font=('Arial', 100),
text=score2str)
frame = Frame(self.root, relief=RAISED, borderwidth=2, background='white')
frame.grid(row=0,column=0)
p1up = Button(frame,text="Player1 +1", height=2, width=10, background='red', command=self.add('one'))
p1up.grid(row = 0,column = 0, padx=10, pady=(20,5))
p1down = Button(frame,text="Player1 -1", height=2, width=10, background='red', command=self.subtract('one'))
p1down.grid(row = 1,column = 0, padx=10, pady=(5,100))
p2up = Button(frame,text="Player2 +1", height=2, width=10, background='blue', command=self.add('two'))
p2up.grid(row = 3,column = 0, padx=10, pady=5)
p2down = Button(frame,text="Player2 -1", height=2, width=10, background='blue', command=self.subtract('two'))
p2down.grid(row = 4,column = 0, padx=10, pady=(5,100))
reset = Button(frame,text="Reset", height=2, width=10, command=self.new_game())
reset.grid(row = 6,column = 0, padx=10, pady=(5,20))
def new_game(self):
global score1, score2 # these are ints
score1 = 0
score2 = 0
self.update_score()
def add(self, player):
global score1, score2 # these are ints
self.player = player
if self.player == 'one':
#if score1 < 11:
score1 += 1
elif self.player == 'two':
#if score2 < 11:
score2 += 1
self.update_score()
return
def subtract(self, player):
global score1, score2 # these are ints
self.player = player
if self.player == 'one':
if score1 > 0:
score1 = score1 - 1
elif self.player == 'two':
if score2 > 0:
score2 -= 1
self.update_score()
return
def update_score(self):
global score1, score2 # these are ints
score1str = str(score1)
score2str = str(score2)
self.canvas.itemconfig(self.score1_id, text=score1str)
self.canvas.itemconfig(self.score2_id, text=score2str)
return
if __name__== '__main__':
root=Tk()
gui=Gui(root)
root.mainloop()