什么控制 Tkinter 中的自动窗口大小调整? [英] What controls automated window resizing in Tkinter?

问题描述

Tkinter 顶级窗口似乎有两种模式":大小由应用程序确定，以及用户控制大小.考虑以下代码:

Tkinter top level windows seem to have two "modes": where the size is being determined by the application, and where the user controls the size. Consider this code:

from tkinter import *

class Test(Frame):
    def __init__(self,parent):
        Frame.__init__(self,parent)
        self.b1 = Button(self, text="Button 1",command=self.b1Press)
        self.b1.pack()

    def b1Press(self):
        print("b1Press")
        label = Label(self, text="Label")
        label.pack()

root = Tk()
ui = Test(root)
ui.pack(fill='both', expand=1)
root.mainloop()

每次我按下按钮时，可见窗口都会改变大小以适应附加标签.但是，如果我手动(使用鼠标)调整窗口大小，则会停止这种自动调整大小的行为，从那时起，我必须手动更改窗口大小以查看添加的新按钮.

Each time I press the button, the visible window changes size to fit an additional label. However, if I resize the window manually (with the mouse), then it stops this auto resizing behaviour, and from then on I have to manually change the size of the window to view new buttons as they are added.

什么决定顶层窗口的大小是由应用程序控制还是由用户控制?

What determines whether the size of a toplevel window is under control of the application or the user?

用户手动调整大小后，应用程序如何恢复自动调整大小?

How can the application regain automatic sizing after the user has manually resized?

推荐答案

规则非常简单 - 顶层窗口在被赋予固定大小时具有固定大小，否则它会缩小以适应".

The rule is pretty simple - a toplevel window has a fixed size whenever it has been given a fixed size, otherwise it "shrinks to fit".

有两种方法可以给顶层窗口一个固定的大小:用户可以手动调整它的大小，或者你的应用程序代码可以调用 wm_geometry 在启动时给它一个大小.

There are two ways to give the top level window a fixed size: the user can resize it manually, or your application code can call wm_geometry to give it a size at startup.

要重置原始行为，请为窗口提供一个空几何体.例如:

To reset the original behavior, give the window a null geometry. For example:

def __init__(self,parent):
    ...
    self.b2 = Button(self, text="Reset", command=self.b2Press)
    self.b2.pack()

def b2Press(self):
    self.winfo_toplevel().wm_geometry("")

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