“widget.pack()的使用不会恢复在Tkinter中被遗忘的pack小部件。”

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英文:

Use of widget.pack() does not recover forgotten pack widget in Tkinter

问题

Here's the translated code snippet you provided:

import tkinter

top = tkinter.Tk()

top.geometry("800x800")
top.title("Text Editor")

edit = False
name = tkinter.Entry(top)

def editTrue():
    global edit
    edit = True
    name.pack_forget()

def editFalse():
    global edit
    edit = False
    name.pack()

menubar = tkinter.Menu(top)
filemenu = tkinter.Menu(menubar, tearoff=0)
filemenu.add_command(label="New", command=editFalse)
filemenu.add_command(label="Edit", command=editTrue)
menubar.add_cascade(label="File", menu=filemenu)
top.config(menu=menubar)

text = tkinter.Text(top, height=800, width=800)

def saveNotes():
    notes = text.get(1.0, "end")

    f = open(name.get() + ".txt", "a")
    f.write(notes)
    f.close()

button = tkinter.Button(top, text="Save", command=saveNotes)

button.pack()
name.pack()
text.pack()

top.mainloop()

Regarding your issue with widget.pack_forget() and widget.pack(), make sure to use the global keyword inside the editTrue() and editFalse() functions to modify the global variable edit, as you are currently creating a local edit variable within those functions.

英文:
import tkinter

top = tkinter.Tk()

top.geometry("800x800")
top.title("Text Editor")

edit = False
name = tkinter.Entry(top)

def editTrue():
    edit = True
    name.pack_forget()

def editFalse():
    edit = False
    name.pack()

menubar = tkinter.Menu(top)
filemenu = tkinter.Menu(menubar, tearoff=0)
filemenu.add_command(label="New", command=editFalse)
filemenu.add_command(label="Edit", command=editTrue)
menubar.add_cascade(label="File", menu=filemenu)
top.config(menu=menubar)

text = tkinter.Text(top, height=800, width=800)


def saveNotes():
    notes = text.get(1.0, "end")

    f = open(name.get() + ".txt", "a")
    f.write(notes)  
    f.close()

button = tkinter.Button(top, text="Save", command=saveNotes)

button.pack()
name.pack()
text.pack()


top.mainloop()

This is my code so far, and the problem is, when I call the widget.pack_forget() function, it works perfectly well. It hides it and all that stuff. But, when I call the widget.pack() again to recover it, it doesn't come up. I don't understand why. I'd appreciate some help.

答案1

得分: 1

你的文本框太大,宽度为800个字符,高度为800行。所以当 name移除 (name.pack_forget()) 然后再次 显示 (name.pack()) 时,它会被打包在文本框下方。由于文本框太大,name 被推出了窗口的可视区域。

要么将文本框变小 (width=80, height=40),要么在文本框之前 pack name,使用 name.pack(before=text)

英文:

Your text box is too big, 800 characters width and 800 lines height. So when name is removed (name.pack_forget()) and then shown again (name.pack()), it will be packed below the text box. Since the text box is too big, name is pushed out of the viewable area of the window.

Either making the text box smaller (width=80, height=40), or pack name before the text box using name.pack(before=text).

答案2

得分: 1

当我再次调用widget.pack()以恢复它时,它不会出现。请使用lambda代替创建的函数。

  • 在第13行,在command关键字中添加lambdapady
  • 在第14行,在command关键字中添加lambda
  • 在第32行,在Entry小部件中添加pady=10

代码片段:

import tkinter

top = tkinter.Tk()
top.geometry("800x800")
top.title("Text Editor")

edit = False
name = tkinter.Entry(top)

menubar = tkinter.Menu(top)
filemenu = tkinter.Menu(menubar, tearoff=0)
filemenu.add_command(label="New", command=lambda: name.pack(pady=10))
filemenu.add_command(label="Edit", command=lambda: name.pack_forget())
menubar.add_cascade(label="File", menu=filemenu)
top.config(menu=menubar)

text = tkinter.Text(top, height=40, width=80)

def saveNotes():
    notes = text.get(1.0, "end")

    f = open(name.get() + ".txt", "a")
    f.write(notes)
    f.close()

button = tkinter.Button(top, text="Save", command=saveNotes)

button.pack()
text.pack()
name.pack(pady=10)

top.mainloop()

截图:您将看到Entry小部件在底部隐藏和显示。

“widget.pack()的使用不会恢复在Tkinter中被遗忘的pack小部件。”

英文:

> when I call the widget.pack() again to recover it, it doesn't come up
Use lambda instead of created functions.

  • In line 13, add lambda and pady in command keyword.
  • In line 14, lambda in command keyword.
  • In line 32, Add pady=10 in Entry widget.

Snippet:

import tkinter

top = tkinter.Tk()
top.geometry("800x800")
top.title("Text Editor")

edit = False
name = tkinter.Entry(top)


menubar = tkinter.Menu(top)
filemenu = tkinter.Menu(menubar, tearoff=0)
filemenu.add_command(label="New", command=lambda: name.pack(pady=10))
filemenu.add_command(label="Edit", command=lambda: name.pack_forget())
menubar.add_cascade(label="File", menu=filemenu)
top.config(menu=menubar)

text = tkinter.Text(top, height=40, width=80)


def saveNotes():
    notes = text.get(1.0, "end")

    f = open(name.get() + ".txt", "a")
    f.write(notes)  
    f.close()

button = tkinter.Button(top, text="Save", command=saveNotes)

button.pack()
text.pack()
name.pack(pady=10)
 
top.mainloop()

Screenshot: You will see Entry widget hidden and shown at the bottom.

“widget.pack()的使用不会恢复在Tkinter中被遗忘的pack小部件。”

huangapple
  • 本文由 发表于 2023年4月19日 17:41:41
  • 转载请务必保留本文链接:https://go.coder-hub.com/76053007.html
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