Question

from tkinter import *
import tkinter as tk

class dashboard(Frame):
    def __init__(self, master):
        super(dashboard, self).__init__(master)
        self.grid()
        self.buttons()

    def buttons(self):
        #student dashboard button
        bttn1 = Button(self, text = "Student",
                       command=self.student, height = 2, width= 15)
        bttn1.grid()

        #teacher dashboard button
        bttn2 = Button(self, text = "Teacher", height = 2, width= 15)
        bttn2.grid()

        #exit button
        bttn3 = Button(self, text = "Exit",
               command=root.destroy, height = 2, width= 15)
        bttn3.grid()

    def student(self):
        #view highscores button
        bttn1 = Button(self, text = "Highscores", height = 2, width= 15)
        bttn1.grid()

        #print score button
        bttn2 = Button(self, text = "Print Score", height = 2, width= 15)
        bttn2.grid()

        #exit button
        bttn3 = Button(self, text = "Main Menu",
               command=root.destroy, height = 2, width= 15)
        bttn3.grid()



#main
root = Tk()
root.title("Dashboard")
root.geometry("300x170")
app = dashboard(root)
root.mainloop()

想知道是否有人可以帮助我基本上，我正在创建这个GUI我希望能够访问同一帧上的新页面，但是一旦我转到另一个页面，主菜单中的按钮就会停留，是否有人知道如何我可以隐藏/忘记按钮并在稍后阶段回复它们？感谢。

Answer 1

已更新以使用子框架

您可以使用通用grid_remove()方法（这里有一些documentation）来实现。使用它的一种方法是保持对创建的Button小部件的每个的引用，以便您可以根据需要在它们上调用此方法。

然而，通过将每个页面的所有Buttons放入单独的子Frame并显示或隐藏它，即使它需要大约相同数量的代码，也可以稍微简化一下它会自动将do传播到它包含的所有小部件。这种方法还为您的其他计划提供了更好的基础。

我已经通过在您的课程中添加main_button_frame属性以及一个名为student_button_frame的属性来实现此功能，以便在学生页面上保留您的属性（因为您可能需要隐藏它他们也是。）

关于grid_remove()的一个好处是，如果您稍后在同一个小部件上调用grid()，它将记住它（及其子小部件）在删除之前的所有设置，因此您不需要自己创建和维护每一个列表。

另请注意，我还对您的代码进行了一些常规修改，以便更好地符合PEP 8 - Style Guide for Python Code建议。我强烈建议您阅读并开始关注它。

from tkinter import *
import tkinter as tk

class Dashboard(Frame):
    def __init__(self, master):
        super().__init__(master)
        self.grid()
        self.main_button_frame = None
        self.student_button_frame = None
        self.create_main_buttons()

    def create_main_buttons(self):
        if self.student_button_frame:  # Exists?
            self.student_button_frame.grid_remove()  # Make it invisible.

        if self.main_button_frame:  # Exists?
            self.main_button_frame.grid()  # Just make it visible.
        else:  # Otherwise create it.
            button_frame = self.main_button_frame = Frame(self)
            button_frame.grid()

            # Student Dashboard button
            bttn1 = Button(button_frame, text="Student",
                           command=self.create_student_buttons, height=2,
                           width=15)
            bttn1.grid()

            # Teacher Dashboard button
            bttn2 = Button(button_frame, text="Teacher", height=2, width=15)
            bttn2.grid()

            # Dashboard Exit button
            bttn3 = Button(button_frame, text="Exit", command=root.destroy,
                           height=2, width=15)
            bttn3.grid()

    def create_student_buttons(self):
        if self.main_button_frame:  # Exists?
            self.main_button_frame.grid_remove()  # Make it invisible.

        if self.student_button_frame:  # Exists?
            student_button_frame.grid()  # Just make it visible.
        else:  # Otherwise create it.
            button_frame = self.student_button_frame = Frame(self)
            button_frame.grid()

            # Highscores button
            bttn1 = Button(button_frame, text="Highscores", height=2, width=15)
            bttn1.grid()

            # Print Score button
            bttn2 = Button(button_frame, text="Print Score", height=2, width=15)
            bttn2.grid()

            # Student Exit button
            bttn3 = Button(button_frame, text="Exit", command=root.destroy,
                           height=2, width=15)
            bttn3.grid()


# main
root = Tk()
root.title("Dashboard")
root.geometry("300x170")
app = Dashboard(root)
root.mainloop()

GUI - 隐藏按钮

1 个答案: