问题描述
如何将占位符添加到 tkinter 中的条目?例如，我不相信它具有像 HTML 这样的占位符功能.我发现要使文本在单击时消失，您必须添加一个 onclick 事件，但是如何创建 onclick 事件以及如何制作文字出现在第一位?这是我正在使用的代码.
How would I add a placeholder to an entry in tkinter? I don't believe it has a placeholder function like HTML for example. I figured out that to make the text disappear when you click it, you will have to add an onclick event, but how do I create the onclick event and how do you make the text appear in the first place? Here is the code I'm working with.
我想说"在此处输入您的整数"
I would like it to say " Enter your integer here"
vcmd = (self.register(self.onValidate), '%S')
self.text = Entry(self, validate='key', vcmd=vcmd)
self.text.pack()
def onValidate(self, S):
if S in '0123456789.':
return True
return False
def clear_entry(self):
self.text.delete(0, END)
self.text.pack()
推荐答案
据我所知，你不能像 HTML 一样添加占位符，但你可以做出类似的行为.当您进入时，您可以执行以下操作>
U can't add placeholder like HTML as far as i know, but u can make similar behavior. When you make entry you can do something like>
from tkinter import *
def clear_entry(event, entry):
entry.delete(0, END)
root = Tk()
entry = Entry(root)
entry.pack()
placeholder_text = 'some text'
entry.insert(0, placeholder_text)
entry.bind("<Button-1>", lambda event: clear_entry(event, entry))
root.mainloop()
P.S:这是我自己写的，还没有测试过
P.S: I've wrote this from my head , haven't tested it
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