Question

我试图在我的输入框中返回要打印的内容，但即使我选择了tkinter凸起按钮提示我选择强制按钮，也会弹出消息框。

挑战：

当我在选择打印按钮之前选择强制按钮时，消息框仍然会弹出。

如果我没有在条目小部件中输入，则弹出的消息会提醒我，但是选择按钮也弹出两次而不是仅显示消息框以提醒我。已将所有功能传递给打印按钮。选中后，我的必修按钮被抬起，然后在执行命令后返回正常状态。

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，我仍然遇到了同样的错误。

   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

欢迎您提出建议，在条目小部件中返回内容，方法是选择强制按钮进行打印。

Answer 1

我认为你做错了 - 你在output()内执行accept_output()所以你无法阻止它。当一切正常时，您必须在accept_output()中执行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Button代替Checkbutton而不需要choosen和raised_button。如果您使用Checkbutton，indicatoron=False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()

如何返回要打印的条目中的内容

1 个答案: