問題描述

如何將占位符添加到 tkinter 中的條目?例如，我不相信它具有像 HTML 這樣的占位符功能.我發(fā)現(xiàn)要使文本在單擊時消失，您必須添加一個 onclick 事件，但是如何創(chuàng)建 onclick 事件以及如何制作文字出現(xiàn)在第一位?這是我正在使用的代碼.

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.

我想說"在此處輸入您的整數(shù)"

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()

推薦答案

據(jù)我所知，你不能像 HTML 一樣添加占位符，但你可以做出類似的行為.當(dāng)您進(jìn)入時，您可以執(zhí)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:這是我自己寫的，還沒有測試過

P.S: I've wrote this from my head , haven't tested it

這篇關(guān)于如何在 Tkinter 中添加占位符的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網(wǎng)！