Question

我有一个使用键绑定的简单GUI - 就像这样。

import Tkinter, tkFileDialog

class Foo(object):
    def __init__(self, master):
        master.bind('3', self.do_bar)
        master.bind('9', self.load_new_config)

        self.load_config()

        if not self.conf:
            self.load_new_config()
        else:
            self.load_data()

    def load_config(self):
        try:
            self.conf = #get stuff from known file
        except FailedToGetStuff:
            self.conf = None

    def load_new_config(self):
        path = askopenfilename(initialdir='~')
        self.conf = #get stuff from file in path
        self.load_data()

    def load_data(self):
        #get data from self.conf, process and display

    def do_bar(self):
        #do stuff with displayed data

if __name__ == "__main__"
    root = Tk()
    Foo(root)
    root.mainloop()

现在，当load_config（）找到它要查找的内容时，这很好用。我可以使用绑定，甚至在使用'9'并加载新配置后，一切正常问题是，如果load_config（）失败，self.conf将设置为None并且从__init__调用load_new_conf，则绑定将不再可用。

我发现问题是由__init__内的tkFileDialog.askopenfilename（）引起的。我不明白为什么会发生这种情况以及如何解决这个问题。

Answer 1

此代码适用于我：

import Tkinter, tkFileDialog

class Foo(object):
    def __init__(self, master):
        master.bind('<KeyPress-3>', self.do_bar)
        master.bind('<KeyPress-9>', self.load_new_config)

        self.load_config()

        if not self.conf:
            master.after(1, self.load_new_config)
        else:
            self.load_data()

    def load_config(self):
        try:
            self.conf = None#get stuff from known file
        except FailedToGetStuff:
            self.conf = None

    def load_new_config(self, e = 0):
        path = tkFileDialog.askopenfilename(initialdir='~')
        self.conf = None#get stuff from file in path
        self.load_data()

    def load_data(self, e = 0):
        pass
        #get data from self.conf, process and display

    def do_bar(self, e = 0):
        print 1
        #do stuff with displayed data

if __name__ == "__main__":
    root = Tkinter.Tk()
    Foo(root)
    root.mainloop()

Python TkInter绑定中断

1 个答案: