Question

经过大量的研究，我来找你帮忙。在来自tkinter的Entry Wdiget上，您可以传递一个validatecommand选项。文档似乎说你首先作为参数传递的函数需要通过.register()函数注册，以便它可以成为一个回调函数。

所以它应该是这样的：

class Window(tk.Tk):                      

    def __init__(self):
        tk.Tk.__init__(self)
        self.entry = EntryBoxFormated()
        self.entry.pack()

class EntryBoxFormated (tk.Entry):

    def __init__ (self, min=None, max=None, precision=None, type=None):   

        if (min == None):
            self.min = 0
        if (max == None):
            self.max = 10
        if (precision == None):
            self.precision = 4
        if (type == None or type != 'string'):
            self.type = "float"

        self.entryTkValue = self.initEntryValue()

        cmd = self.register(self.entryFloatValidation)
        super().__init__(textvariable = self.entryTkValue, text = self.entryTkValue, validate=tk.ALL, validatecommand = cmd)

    def initEntryValue(self):
        initVal = "0"
        if (self.precision > 0):
            initVal += "."
            for i in range(0,self.precision):
                initVal += "0"
        return tk.StringVar(value=initVal)

    def entryFloatValidation(self):

        tempString = self.entryTkValue.get()
        n = len(tempString)
        nbPoints = 0
        res = True
        i=0

        while (i<n):
            if (tempString[i] < '0' or tempString[i] > '9'):
                if (tempString[i] == ',' or tempString[i] == ';'):
                    tempString[i] == '.'

                if (tempString[i] == '.'):
                    nbPoints += 1
                    if (nbPoints > 1):
                        res = False
                else:
                    res = False

        if (res):
            if (float(tempString) < self.min or float(tempString) > self.max):
                res = False
            else:
                self.delete(0,tk.END)
                self.insert(0,tempString)

        return res


if (__name__ == '__main__'):
    window = Window()    
    window.mainloop()
    window.quit()

但是有了这个，我收到了这个错误：

Traceback (most recent call last):   File
"/home/aubin/PyzoWorkspace/Interface/TESTS/topic.py", line 75, in
<module>
    window = Window()   File "/home/aubin/PyzoWorkspace/Interface/TESTS/topic.py", line 9, in
__init__
    self.entry = EntryBoxFormated()   File "/home/aubin/PyzoWorkspace/Interface/TESTS/topic.py", line 28, in
__init__
    cmd = self.register(self.entryFloatValidation)   File "/home/aubin/anaconda3/lib/python3.6/tkinter/__init__.py", line 1366,
in _register
    self.tk.createcommand(name, f) AttributeError: 'EntryBoxFormated' object has no attribute 'tk'

如果我跳过在EntryBoxFormated类的init（）中注册的调用，我没有得到任何错误，但窗口没有显示。

我在伪造什么吗？

提前致谢。

编辑：有办法绕过那个吗？我认为以下行但它没有（没有错误，但窗口没有出现）

super().__init__(textvariable = self.entryTkValue, text = self.entryTkValue, validate=tk.ALL)
cmd = self.register(self.entryFloatValidation)
self.configure(validatecommand=cmd)

Tkinter：无法获得注册功能

0 个答案: