Tkinter

Question

如何将下面修改后的代码 () 中的 Tkinter Spinbox 的跟踪值放入变量中，以便我可以将其用作时间戳？

我添加了印刷品以视觉确认实际正在跟踪更改但是当我添加

b = tk.Button(text='get', command=App(root).trace_varhour)

b.pack()

就在 root.mainloop() 之前它返回了 13，这是默认值而不是跟踪值。

import tkinter as tk

class App(tk.Frame):

    def __init__(self, parent):
        super().__init__(parent)
        self.hourstr = tk.StringVar(self, '13')
        self.hour = tk.Spinbox(self, from_=13, to=23, wrap=True, textvariable=self.hourstr, width=2, state='readonly')

        self.minstr = tk.StringVar(self, '30')
        self.min = tk.Spinbox(self, from_=0, to=59, wrap=True, textvariable=self.minstr, width=2)

        self.secstr = tk.StringVar(self, '00')
        self.sec = tk.Spinbox(self, from_=0, to=59, wrap=True,textvariable=self.secstr, width=2)

        self.last_valueSec = ''
        self.last_value = ''
        self.last_valuehour = ''

        self.hourstr.trace('w', self.trace_varhour)
        self.minstr.trace('w', self.trace_var)
        self.secstr.trace('w', self.trace_varsec)

        self.hour.grid()
        self.min.grid(row=0, column=1)
        self.sec.grid(row=0, column=2)

    def trace_varhour(self, *args):
        self.last_valuehour = self.hourstr.get()
        print(self.last_valuehour)
        return self.last_valuehour

    def trace_var(self, *args):
        self.last_value = self.minstr.get()
    #     return self.last_value

    def trace_varsec(self, *args):
        self.last_valueSec = self.secstr.get()
    # return self.last_valueSec
root = tk.Tk()
App(root).pack()
b = tk.Button(text='get', command=App(root).trace_varhour)
b.pack()
root.mainloop()

Answer 1

经过反复试验，我找到了解决我问题的方法，希望对任何人有帮助：

import tkinter as tk

class App(tk.Frame):

    def __init__(self, parent):
        super().__init__(parent)
        self.hourstr = tk.StringVar(self, '13')
        self.hour = tk.Spinbox(self, from_=13, to=23, wrap=True, textvariable=self.hourstr, width=2, state='readonly')

        self.minstr = tk.StringVar(self, '30')
        self.min = tk.Spinbox(self, from_=0, to=59, wrap=True, textvariable=self.minstr, width=2)

        self.secstr = tk.StringVar(self, '00')
        self.sec = tk.Spinbox(self, from_=0, to=59, wrap=True,textvariable=self.secstr, width=2)

        self.last_valueSec = ''
        self.last_value = ''
        self.last_valuehour = ''

        self.hourstr.trace('w', self.trace_varhour)
        self.minstr.trace('w', self.trace_var)
        self.secstr.trace('w', self.trace_varsec)

        self.hour.grid()
        self.min.grid(row=0, column=1)
        self.sec.grid(row=0, column=2)

    def trace_varhour(self, *args):
        self.last_valuehour = self.hourstr.get()

    def trace_var(self, *args):
        self.last_value = self.minstr.get()

    def trace_varsec(self, *args):
        self.last_valueSec = self.secstr.get()

root = tk.Tk()
app = App(root)
app.pack()

def get_time():
    get_time = app.last_valuehour + ":" + app.last_value + ":" + app.last_valueSec
    print(get_time)


b = tk.Button(text='get', command=get_time)
b.pack()
root.mainloop()

Tkinter - Spinbox - 如何将跟踪值放入变量中？

Tkinter - Spinbox - How can I get traced values into a variable?

trace

python-3.x