Python(Tkinter)单击按钮使文本出现在输入框中?

时间:2018-08-28 13:10:11

标签: python button tkinter

我试图在按下按钮时使文本显示在GUI应用程序的输入框中。目的是当按下一个按钮时,在教科书中会出现一些定义的文本,而当按下另一个按钮时,将清除先前的输入框,并将不同的文本插入同一输入框。

我是Python的新手,因此不确定如何执行此操作?到目前为止,我有三个按钮可以在GUI中将每个按钮显示为不同的文本,而不是显示在单独的文本框中。有人可以帮忙吗?这是我的当前代码:

`#*****前言代码*****

from tkinter import *
from tkinter import ttk
import tkinter.messagebox

def new():
 tkinter.messagebox.showinfo('Window Title', 'Well, this is new...')

root = Tk()
root.title("GUI Test Version 2")
root.resizable(False, False)
root.geometry('{}x{}'.format(400, 400))

*****主菜单*****

menu = Menu(root)
root.config(menu=menu)

subMenu = Menu(menu)
menu.add_cascade(label="File", menu=subMenu)
subMenu.add_command(label="New Experiment...", command=new)
subMenu.add_command(label="New...", command=new)
subMenu.add_separator()
subMenu.add_command(label="Exit", command=root.destroy)

editMenu = Menu(menu)
menu.add_cascade(label="Edit", menu=editMenu)
editMenu.add_command(label="Redo", command=new)

*****工具栏*****

toolbar = Frame(root, bg="light blue")
toolbar.pack(side=TOP, fill=X)

*****创建按钮*****

class App(object):
     def __init__(self,root):
     self.root = root

     self.txt_frm = Frame(self.root, width=900, height=900)
     self.txt_frm.pack(fill="both", expand=True)
     button1 = Button(self.txt_frm,text="HELLO", command = self.hello_world)
     button1.grid(column=0,row=2, padx=2, pady=2)
     button2 = Button(self.txt_frm,text="GOODBYE", command = self.goodbye_world)
     button2.grid(column=1,row=2, padx=2, pady=2)
     button3 = Button(self.txt_frm,text="NEW", command = self.new_world, bg="red",fg="white")
     button3.grid(column=2,row=2, padx=2, pady=2)

 def hello_world(self):
        label = Label(self.txt_frm,text='HELLO WORLD!')
        label.grid(column=0,row=3)

 def goodbye_world(self):
        label = Label(self.txt_frm,text='GOODBYE WORLD!')
        label.grid(column=1,row=3)

 def new_world(self):
        label = Label(self.txt_frm,text='THIS IS A NEW WORLD!')
        label.grid(column=2,row=3)

*****状态栏*****

status = Label(root, text="Preparing to begin...", bd=1, relief=SUNKEN,     anchor=W) # bd = bordered, relief = ,  appear placed in screen, anchor = w (NESW) needs two other properties
status.pack(side=BOTTOM, fill=X)

*****运行代码*****

app = App(root)
root.mainloop()`

2 个答案:

答案 0 :(得分:0)

读取和写入条目的通常方法是使用StringVar作为textvariable。检查以下代码:

from tkinter import *

root = Tk()
root.geometry('300x100')

class App(object):
     def __init__(self,root):
         self.root = root
         self.txt_frm = Frame(self.root, width=900, height=900, bg='khaki')
         self.txt_frm.pack(fill="both", expand=True)
         button1 = Button(self.txt_frm,text="Hello", command = self.hello_world)
         button1.grid(column=0,row=2, padx=2, pady=2)
         button2 = Button(self.txt_frm,text="Goodbye", command = self.goodbye_world)
         button2.grid(column=1,row=2, padx=2, pady=2)
         self.entry_var = StringVar()
         entry = Entry(self.txt_frm, textvariable=self.entry_var)
         entry.grid(column=0, row=3, columnspan=2, padx=2, pady=2)

     def hello_world(self):
            self.entry_var.set('Hello')

     def goodbye_world(self):
            self.entry_var.set('World')

app = App(root)
root.mainloop()

我正在将StringVar self.entry_var分配给该条目。然后,我使用按钮回调函数通过修改self.entry_var来更改条目的内容。

答案 1 :(得分:0)

__init__中添加标签,并在以后使用label.config(text=text)更改其文本。这是示例代码:

from tkinter import *
from tkinter import ttk
import tkinter.messagebox

def new():
 tkinter.messagebox.showinfo('Window Title', 'Well, this is new...')

root = Tk()
root.title("GUI Test Version 2")
root.resizable(False, False)
root.geometry('{}x{}'.format(400, 400))
menu = Menu(root)
root.config(menu=menu)

subMenu = Menu(menu)
menu.add_cascade(label="File", menu=subMenu)
subMenu.add_command(label="New Experiment...", command=new)
subMenu.add_command(label="New...", command=new)
subMenu.add_separator()
subMenu.add_command(label="Exit", command=root.destroy)

editMenu = Menu(menu)
menu.add_cascade(label="Edit", menu=editMenu)
editMenu.add_command(label="Redo", command=new)
toolbar = Frame(root, bg="light blue")
toolbar.pack(side=TOP, fill=X)
class App(object):
    def __init__(self,root):
        self.root = root

        self.txt_frm = Frame(self.root, width=900, height=900)
        self.txt_frm.pack(fill="both", expand=True)
        button1 = Button(self.txt_frm,text="HELLO", command = self.hello_world)
        button1.grid(column=0,row=2, padx=2, pady=2)
        button2 = Button(self.txt_frm,text="GOODBYE", command = self.goodbye_world)
        button2.grid(column=1,row=2, padx=2, pady=2)
        button3 = Button(self.txt_frm,text="NEW", command = self.new_world, bg="red",fg="white")
        button3.grid(column=2,row=2, padx=2, pady=2)
        self.label = Label(self.txt_frm,text='')
        self.label.grid(column=0,row=3)
    def hello_world(self):
        self.label.config(text="HELLO WORLD!")

    def goodbye_world(self):
        self.label.config(text="GOODBYE WORLD!")

    def new_world(self):
        self.label.config(text="THIS IS A NEW WORLD!")
status = Label(root, text="Preparing to begin...", bd=1, relief=SUNKEN,     anchor=W) # bd = bordered, relief = ,  appear placed in screen, anchor = w (NESW) needs two other properties
status.pack(side=BOTTOM, fill=X)
app = App(root)
root.mainloop()