tkiner Entry focus问题

Jiang_yt_

可能是我的问题没有描述清楚，就比如下面的程序，为什么第一次执行就没有问题（比如1+2 =3），然后再接着修改成11+22 = 程序就没有反应了？？
#coding=utf-8
#!/usr/bin/env python

from tkinter import *

root = Tk()

def checkInt(content):

    # try:
    #     content = int(content)
    # except ValueError:
    #     print('请输入数字')
    # except:
    #     print('Unexpected error:', sys.exc_info()[0])
    # if isinstance(content, int):
    #     print('正确')
    #     return True
    # else:
    #     print('错误')
    #     print(content)
    #     return False
    return content.isdigit()

def sumTest():
    sumNum.delete(0, END)
    if not num1.get().isdigit():
        num1Value = '0'
    else:
        num1Value= num1.get()
    if not num2.get().isdigit():
        num2Value = '0'
    else:
        num2Value = num2.get()
    print(str(int(num1Value) + int(num2Value)))
    sumValue.set(str(int(num1Value) + int(num2Value)))
    return True

def sumCal():
    sumNum.delete(0, END)
    if not num1.get().isdigit():
        num1Value = '0'
    else:
        num1Value= num1.get()
    if not num2.get().isdigit():
        num2Value = '0'
    else:
        num2Value = num2.get()
    print(str(int(num1Value) + int(num2Value)))
    sumValue.set(str(int(num1Value) + int(num2Value)))
    return True


check = root.register(checkInt)

sumValue = StringVar()

num1 = Entry(root, width = 9, validate = 'key', validatecommand = (check, '%P'))
l1 = Label(root, text = '+')
num2 = Entry(root, width = 9, validate = 'key', validatecommand = (check, '%P'))
l2 = Label(root, text = '=')
# sumNum = Entry(root, width = 9, state = 'readonly', textvariable = sumValue)

sumNum = Entry(root, width = 9, state = 'readonly', textvariable = sumValue, validate = 'focusin', validatecommand = sumTest)
# button1 = Button(root, text = '计算', width = 8, command = sumCal)
# button1.grid(row = 1, column = 2, pady = 5)
num1.grid(row = 0, column = 0, padx = 10, pady = 10)
l1.grid(row = 0, column = 1, padx = 10, pady = 10)
num2.grid(row = 0, column = 2, padx = 10, pady = 10)
l2.grid(row = 0, column = 3, padx = 10, pady = 10)
sumNum.grid(row = 0, column = 4, padx = 10, pady = 10)



mainloop()

ba21

请问你的返回值呢？？？

BngThea

你设置的validate格式就是 'focusout'
其意思是当entry组件失去焦点的时候才进行验证，
你可以改为"focus" 或者'all'

Jiang_yt_

ba21 发表于 2017-10-23 12:53
请问你的返回值呢？？？

可能是我的问题没有描述清楚，就比如下面的程序，为什么第一次执行就没有问题（比如1+2 =3），然后再接着修改成11+22 = 程序就没有反应了？？
#coding=utf-8
#!/usr/bin/env python

from tkinter import *

root = Tk()

def checkInt(content):

    # try:
    #     content = int(content)
    # except ValueError:
    #     print('请输入数字')
    # except:
    #     print('Unexpected error:', sys.exc_info()[0])
    # if isinstance(content, int):
    #     print('正确')
    #     return True
    # else:
    #     print('错误')
    #     print(content)
    #     return False
    return content.isdigit()

def sumTest():
    sumNum.delete(0, END)
    if not num1.get().isdigit():
        num1Value = '0'
    else:
        num1Value= num1.get()
    if not num2.get().isdigit():
        num2Value = '0'
    else:
        num2Value = num2.get()
    print(str(int(num1Value) + int(num2Value)))
    sumValue.set(str(int(num1Value) + int(num2Value)))
    return True

def sumCal():
    sumNum.delete(0, END)
    if not num1.get().isdigit():
        num1Value = '0'
    else:
        num1Value= num1.get()
    if not num2.get().isdigit():
        num2Value = '0'
    else:
        num2Value = num2.get()
    print(str(int(num1Value) + int(num2Value)))
    sumValue.set(str(int(num1Value) + int(num2Value)))
    return True


check = root.register(checkInt)

sumValue = StringVar()

num1 = Entry(root, width = 9, validate = 'key', validatecommand = (check, '%P'))
l1 = Label(root, text = '+')
num2 = Entry(root, width = 9, validate = 'key', validatecommand = (check, '%P'))
l2 = Label(root, text = '=')
# sumNum = Entry(root, width = 9, state = 'readonly', textvariable = sumValue)

sumNum = Entry(root, width = 9, state = 'readonly', textvariable = sumValue, validate = 'focusin', validatecommand = sumTest)
# button1 = Button(root, text = '计算', width = 8, command = sumCal)
# button1.grid(row = 1, column = 2, pady = 5)
num1.grid(row = 0, column = 0, padx = 10, pady = 10)
l1.grid(row = 0, column = 1, padx = 10, pady = 10)
num2.grid(row = 0, column = 2, padx = 10, pady = 10)
l2.grid(row = 0, column = 3, padx = 10, pady = 10)
sumNum.grid(row = 0, column = 4, padx = 10, pady = 10)



mainloop()

Jiang_yt_

BngThea 发表于 2017-10-23 12:54
你设置的validate格式就是 'focusout'
其意思是当entry组件失去焦点的时候才进行验证，
你可以改为"focus ...

这个没用

ba21

Jiang_yt_ 发表于 2017-10-23 13:39
可能是我的问题没有描述清楚，就比如下面的程序，为什么第一次执行就没有问题（比如1+2 =3），然后再接着 ...

都放这里可否？？？check = root.register(checkInt)

Jiang_yt_

ba21 发表于 2017-10-23 14:53
都放这里可否？？？check = root.register(checkInt)

前面两个数值的check没有问题，检验OK，理论上是发生第3个focus后就会更新一下数据，但是问题是第一次第3个entry更新ok， 然后后续就没反应了