Tkinter 控件

文章更新于：2020-02-19
待翻译跟进

In this part of the Tkinter tutorial, we will cover some basic Tkinter widgets. We work with the following widgets: Checkbutton, Label, Scale, and Listbox.

Widgets are basic building blocks of a GUI application. Over the years, several widgets became a standard in all toolkits on all OS platforms; for example a button, a check box or a scroll bar. Some of them might have different names. For instance, a check box is called a check button in Tkinter. Tkinter has a small set of widgets which cover basic programming needs. More specialised widgets can be created as custom widgets.
Tkinter Checkbutton

Checkbutton is a widget that has two states: on and off. The on state is visualized by a check mark. (Some themes may have different visuals.) It is used to denote some boolean property. The Checkbutton widget provides a check box with a text label.

#!/usr/bin/env python3

"""
ZetCode Tkinter tutorial

This program toggles the title of the
window with the Checkbutton widget.

Author: Jan Bodnar
Last modified: April 2019
Website: www.zetcode.com
"""

from tkinter import Tk, Frame, Checkbutton
from tkinter import BooleanVar, BOTH

class Example(Frame):

    def __init__(self):
        super().__init__()

        self.initUI()


    def initUI(self):

        self.master.title("Checkbutton")

        self.pack(fill=BOTH, expand=True)
        self.var = BooleanVar()

        cb = Checkbutton(self, text="Show title",
            variable=self.var, command=self.onClick)
        cb.select()
        cb.place(x=50, y=50)


    def onClick(self):

        if self.var.get() == True:
            self.master.title("Checkbutton")
        else:
            self.master.title("")


def main():

    root = Tk()
    root.geometry("250x150+300+300")
    app = Example()
    root.mainloop()


if __name__ == '__main__':
    main()