我的全部代码是 here .
使用 tkinter 的 Canvas ,我正在尝试创建一个小游戏,让人们练习学习高音谱号上的音符。
最初会显示一个随机音符,用户必须选择正确的音符。如果学生得到正确答案,我无法编辑 Canvas 以显示新笔记的图像。
有人可以解释一下我的代码有什么问题吗?
while True:
randomNote = randint(0, 11)
path = noteFiles[randomNote]
correctNote = notes[randomNote]
img = Image.open(path)
tk_img = ImageTk.PhotoImage(img)
canvas.create_image(505, 200, image=tk_img)
root.mainloop()
if correctNote == noteChosen:
''' User got last note right '''
canvas.delete("all")
最佳答案
运行下面的代码并尝试理解它的作用和方式。当您按下所显示音符的按钮时,它会一次又一次地显示五个中的随机“音符”(否则它会打印出错误的选择音符并等到您正确为止)。我想这就是你所需要的。您自己的脚本编写尝试表明您必须花一些功夫来理解 tkinter 背后的基 native 制。阅读评论以提示您自己的编码尝试出了什么问题。
请注意,您必须自己扩展词典才能让按钮涵盖所有范围的注释。
“隐藏”功能是,如果您不喜欢显示的音符,可以使用向右箭头键切换到下一个音符 :D 。
from random import randint
from tkinter import *
import tkinter as tk
from PIL import ImageTk, Image
root = Tk()
root.wm_attributes("-topmost", 1)
root.geometry('{}x{}'.format(1100, 720)) # window size
# canvas = Canvas(root, bd=0, highlightthickness=0)
canvas = Canvas(root, width=950, height=700)
# canvas.pack()
def client_exit():
''' Quit Button '''
exit()
def pickNote(value):
''' Changes noteChosen var to the note's button pressed '''
global correctNote
noteChosen = value
if noteChosen == correctNote:
print("SUCCESS !!!")
displayRandomNote(None)
else:
print( " :( ", noteChosen, " :( ")
# Creates button to exit the program
quitButton = tk.Button(text="Quit", command=client_exit)
quitButton.place(x=480, y=480)
# Creates buttons for various notes
aButton = tk.Button(text="A", command=lambda *args: pickNote("A"))
aButton.config(height=3, width=9)
aButton.place(x=190, y=400)
bButton = tk.Button(text="B", command=lambda *args: pickNote("B"))
bButton.config(height=3, width=9)
bButton.place(x=280, y=400)
cButton = tk.Button(text="C", command=lambda *args: pickNote("C"))
cButton.config(height=3, width=9)
cButton.place(x=370, y=400)
dButton = tk.Button(text="D", command=lambda *args: pickNote("D"))
dButton.config(height=3, width=9)
dButton.place(x=460, y=400)
eButton = tk.Button(text="E", command=lambda *args: pickNote("E"))
eButton.config(height=3, width=9)
eButton.place(x=550, y=400)
fButton = tk.Button(text="F", command=lambda *args: pickNote("F"))
fButton.config(height=3, width=9)
fButton.place(x=640, y=400)
gButton = tk.Button(text="G", command=lambda *args: pickNote("G"))
gButton.config(height=3, width=9)
gButton.place(x=730, y=400)
noteFiles = { 1:'1.png', 2:'2.png', 3:'3.png', 4:'4.png', 5:'5.png' }
notes = { 1:'A' , 2:'B' , 3:'C' , 4:'D' , 5:'E' }
randomNote = randint(1, 5)
path = noteFiles[randomNote]
correctNote = notes[randomNote]
img = Image.open(path)
tk_img = ImageTk.PhotoImage(img)
imageOnCanvas = canvas.create_image(130, 150, image=tk_img) # position of image center in window
canvas.pack()
def displayRandomNote(event):
global canvas
global imageOnCanvas
global tk_img
global correctNote
global notes
randomNote = randint(1, 5)
path = noteFiles[randomNote]
correctNote = notes[randomNote]
img = Image.open(path)
tk_img = ImageTk.PhotoImage(img)
canvas.itemconfig(imageOnCanvas, image=tk_img) # change the displayed picture
canvas.pack()
# userResponse = input("Which note?\n ")
# if userResponse == correctNote:
# print(" SUCCESS :) !!!")
# print("(switch focus)")
# else:
# print(" TRY ANOTHER ONE ...")
# print("(switch focus)")
# print("Switch window focus to CONSOLE to input the answer. ")
# print("Swicht window focus to IMAGE (press right arrow key for a Note)")
root.bind('<Right>', displayRandomNote) # on right arrow key display random note
root.mainloop()
附录:此程序中接下来要实现的是,如果按下右侧的一个按钮,则让显示的音符播放。
关于python - 在 while 循环中更改 tkinter Canvas 中的图像,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/43691102/