如何return条目中的内容打印出来

Question

我正在尝试 return 打印输入框中的内容，但即使我 select tkinter 凸起按钮提醒我 select 强制按钮，消息框也会弹出.

挑战：

当我 select 在 select 打印按钮之前的强制按钮时，消息框仍然弹出。

如果我不在条目小部件中键入，它的消息会弹出来提醒我，但是 select 按钮也会弹出两次，而不仅仅是消息框来提醒我。也已将所有功能传递给打印按钮。我的强制按钮在执行命令后 selected 然后 return 到正常状态时将被提升。

import tkinter as tk

from tkinter import messagebox
import win32print, win32ui, win32con


def output():
    global choosed

    now = new.get()

    if not choosed:
        messagebox.showerror("error", "select the buttons")
    elif len(now) == 0:
        messagebox.showerror("error", "entry empty")
    else:
       return (now)


def accept_output():

    dc = win32ui.CreateDC()
    printername = win32print.GetDefaultPrinter()
    dc.CreatePrinterDC(printername)
    dc.SetMapMode(win32con.MM_TWIPS)
    scale_factor = 20
    dc.StartDoc('Win32print ')
    pen = win32ui.CreatePen(0, int(scale_factor), 0)
    dc.SelectObject(pen)
    font = win32ui.CreateFont({
        "name": "Lucida Console",
        "height": int(scale_factor * 10),
        "weight": 400,
    })
    dc.SelectObject(font)
    dc.TextOut(scale_factor * 72,-1 * scale_factor * 72, output())# to 
receive the content in the entry widget
    dc.EndDoc()


def raised_button(button_object):
    global choosed

    if choosed: # previously clicked
        choosed.configure(relief=tk.RAISED, state=tk.ACTIVE)

    choosed = button_object
    button_object.configure(relief=tk.SUNKEN, state=tk.DISABLED)


def stop():
    global choosed

    choosed = None

    lot1.configure(relief=tk.RAISED, state=tk.ACTIVE)


root = tk.Tk()
root.geometry("400x400")


new = tk.StringVar()
en = tk.Entry(root, textvariable=new).pack()

choosed = False

lot1 = tk.Button(root, text="compulsory to select")
lot1.configure(command=lambda button_object=lot1: 
raised_button(button_object))
lot1.pack(side="left")

B=tk.Button(root, text="print number", command=lambda:[output(), stop(), 
accept_output()])
B.place(x=150, y=300)

root.mainloop()

我在 accept_output() 之上包含了 output() 函数，我仍然遇到同样的错误。

   def accept_output():

    global choosed

    now = new.get()

    if not choosed:
       messagebox.showerror("error", "select one of the buttons")
    elif len(now) == 0:
       messagebox.showerror("error", "entry empty")
    else:
        return (now)  # when i add the output here it gives select button

欢迎您对 return 条目小部件中的内容提出建议，以便通过 select 强制按钮打印。

Answer 1

我认为你做错了 - 你在 accept_output() 中执行 output() 所以你无法阻止它。当一切正常时，您必须在 output() 中执行 accept_output()。

import tkinter as tk

from tkinter import messagebox
import win32print, win32ui, win32con


def output():
    global choosed

    text = new.get()

    if not choosed:
        messagebox.showerror("error", "select the buttons")
    elif len(text) == 0:
        messagebox.showerror("error", "entry empty")
    else:
        accept_output(text)

    choosed = None
    lot1.configure(relief=tk.RAISED, state=tk.ACTIVE)


def accept_output(text):

    print("printing ...", text)

    dc = win32ui.CreateDC()
    printername = win32print.GetDefaultPrinter()
    dc.CreatePrinterDC(printername)
    dc.SetMapMode(win32con.MM_TWIPS)
    scale_factor = 20
    dc.StartDoc('Win32print ')
    pen = win32ui.CreatePen(0, int(scale_factor), 0)
    dc.SelectObject(pen)
    font = win32ui.CreateFont({
        "name": "Lucida Console",
        "height": int(scale_factor * 10),
        "weight": 400,
    })
    dc.SelectObject(font)
    dc.TextOut(scale_factor * 72,-1 * scale_factor * 72, text) # <- text 
    dc.EndDoc()


def raised_button(button_object):
    global choosed

    # function will be not accesible if you use state=tk.DISABLED
    # so I remove state=tk.DISABLED

    if choosed: # previously clicked 
        choosed.configure(relief=tk.RAISED)
        choosed = None
    else:    
        button_object.configure(relief=tk.SUNKEN)
        choosed = button_object

# --- main ---

choosed = False

root = tk.Tk()

new = tk.StringVar()
tk.Entry(root, textvariable=new).pack()

lot1 = tk.Button(root, text="Compulsory to select")
lot1.configure(command=lambda button_object=lot1:raised_button(button_object))
lot1.pack()

tk.Button(root, text="Print number", command=output).pack()

root.mainloop()

您可以使用 Checkbutton 而不是 Button，并且您将不需要函数 choosen 和 raised_button。如果使用 indicatoron=False.

，Checkbutton 甚至可以看起来像普通按钮

import tkinter as tk

from tkinter import messagebox
import win32print, win32ui, win32con

def output():

    text = new.get()

    if not option1.get() and not option2.get():
        messagebox.showerror("error", "select options")
    elif len(text) == 0:
        messagebox.showerror("error", "entry empty")
    else:
        accept_output(text)

    option1.set(False)
    option2.set(False)

def accept_output(text):

    print("printing ...", text)

    dc = win32ui.CreateDC()
    printername = win32print.GetDefaultPrinter()
    dc.CreatePrinterDC(printername)
    dc.SetMapMode(win32con.MM_TWIPS)
    scale_factor = 20
    dc.StartDoc('Win32print ')
    pen = win32ui.CreatePen(0, int(scale_factor), 0)
    dc.SelectObject(pen)
    font = win32ui.CreateFont({
        "name": "Lucida Console",
        "height": int(scale_factor * 10),
        "weight": 400,
    })
    dc.SelectObject(font)
    dc.TextOut(scale_factor * 72,-1 * scale_factor * 72, text) # <- text 
    dc.EndDoc()

# --- main ---

root = tk.Tk()

new = tk.StringVar()
tk.Entry(root, textvariable=new).pack()

option1 = tk.BooleanVar(value=False)
tk.Checkbutton(root, text="Compulsory to select (option1)", var=option1).pack()

option2 = tk.BooleanVar(value=False)
tk.Checkbutton(root, text="Compulsory to select (option2)", var=option2, indicatoron=False).pack()

tk.Button(root, text="Print number", command=output).pack()

root.mainloop()

如何return条目中的内容打印出来

How to return content in entry to be printed

python

printing

tkinter

pywin32