问题描述
我正在使用 tkinter 为用户创建收据，我想使用 thermal printer 打印它。
如何将打印机连接到 tkinter 窗口。在 tkinter 中，我使用 ScrolledText 小部件来创建收据。
主窗口代码：
import tkinter as tk
import tkinter.ttk as ttk
from tkinter.scrolledtext import ScrolledText
import time
class BillWindow:
def __init__(self,customer_name,customer_contact,items,master):
self.master = master
self.items = items
self.customer_name = customer_name
self.customer_contact = customer_contact
# Creating Top-level window & Setting Window Width and height
self.bill_win = tk.Toplevel(master)
win_width,win_height = 727,492
screen_width = master.winfo_screenwidth()
screen_height = master.winfo_screenheight()
x = int((screen_width / 2) - (win_width / 2)) - 7
y = int((screen_height / 2) - (win_height / 2)) - 35
self.bill_win.geometry(f'{win_width}x{win_height}+{x}+{y}')
self.bill_win.resizable(0,0) # disabling resize of window
# Forcing Top-level window to stay on Top
self.bill_win.attributes('-topmost','true')
# Setting Top Level Window Title
self.bill_win.title("BILL")
# Adding icon to title menu
self.bill_win.iconbitmap("./bill_title.ico")
# ============= BILL FRAME Background Body Frame ==============#
bill_frame = ttk.Frame(self.bill_win,width=win_width,height=win_height)
bill_frame.place(x=0,y=0)
# Bill Title
bill_title = ttk.Label(bill_frame,text="BILL",font="Consolas 30 bold",border=7,relief="groove",anchor='c',background='#282c34',foreground='#fff')
bill_title.grid(row=0,ipadx=317)
# Bill Contents/Text Area
self.bill_text = ScrolledText(bill_frame,font="Consolas 10",width=101,height=29)
self.bill_text.grid(row=1,sticky='W')
# Define attributes for Bill entry
heading = "Retail Invoice"
cust_name = f"Customer Name : {customer_name}"
cust_phno = f"Customer Number : {customer_contact}"
# Defining date and time variables
self.date_string = "Date : " + time.strftime("%d/%b/%Y")
self.time_string = "Time : " + time.strftime("%I:%M:%s %p")
# print(date_string,time_string)
# First Deleting Entire bill Contents/Texts
self.bill_text.delete('1.0','end')
# Inserting to Clean bill/Texts
self.bill_text.insert('end',"\n" + heading + "\n")
self.bill_text.insert('end',"\n" + cust_name)
self.bill_text.insert('end',"\t\t\t\t\t\t\t\t\t" + self.date_string + "\n")
self.bill_text.insert('end',"\n" + cust_phno)
self.bill_text.insert('end',"\t\t\t\t\t\t\t\t\t" + self.time_string + "\n\n")
self.bill_text.insert('end',"-" * 100 + "\n")
self.bill_text.insert('end',"No Product Name\t\t\t\t\t\t Quantity\t\t Rate(\u20B9)\t\t Total(\u20B9)\n")
self.bill_text.insert('end',"-" * 100 + "\n")
# Total Price set to 0 before calculating
sum = 0.0
# Inserting items to Bill and Calculating sum of all contents
for i in range(len(items)):
item = items[i]
self.bill_text.insert('end',f"\n {i + 1} {item[0]}\t\t\t\t\t\t\t{item[1]}\t\t{item[2]}\t\t{item[3]}")
total_col = item[3]
total_col = float(total_col.split("\u20B9")[1])
sum = sum + total_col
# print(items[i])
# Inserting sum amount at the end
self.bill_text.insert('end',"\n\n\n\n" + "-" * 100 + "\n")
# print(sum)
self.total_amt = f"\u20B9 {sum}"
self.bill_text.insert('end',f"TOTAL = {self.total_amt}")
self.bill_text.insert('end',"\n" + "-" * 100 + "\n")
# Tags and styling
self.bill_text.tag_add('heading','2.0','2.end')
self.bill_text.tag_config('heading',font='Arial 20 bold',justify='center')
self.bill_text.tag_add('customer','4.0','6.end')
self.bill_text.tag_config('customer',font='Consolas 11',lmargin1=20)
self.bill_text.tag_add('sub-head','9.0','9.end')
self.bill_text.tag_config('sub-head',font='Consolas 12 bold',lmargin1=10)
total_line = str(i + 17) # Calculating total lines to style Total Amount
# print(total_line)
self.bill_text.tag_add('total',f'{total_line}.0',f'{total_line}.end')
self.bill_text.tag_config('total',font='Aerial 15 bold',justify='center')
# disabling modification of bill
self.bill_text.config(state='disabled')
if __name__ == "__main__":
master = tk.Tk()
master.attributes('-topmost','true')
items = [['Set Wet Hair Gel Cool,50ml',10,'₹ 50.5','₹ 505.0'],['Set Wet Hair Gel Cool,20,'₹ 1010.0'],['Fair & lovely Women,50g',50,'₹ 97.0','₹ 4850.0'],['Nivea Lip Balm,4.8g',140,'₹ 105.0','₹ 14700.0'],['testing',1,'₹ 1.0','₹ 10.0'],'₹ 10.0','₹ 10.0']]
customer_name = "Testing"
customer_contact = "999"
win_obj = BillWindow(customer_name,master)
master.mainloop()
我找到了这段代码，但对我来说没有帮助：
INCH = 1440
pDC = win32ui.CreateDC()
pDC.CreatePrinterDC(win32print.GetDefaultPrinter())
pDC.StartDoc("Main Slip")
pDC.StartPage()
pDC.SetMapMode(win32con.MM_TWIPS)
TEXT = str("")
pDC.DrawText(TEXT,(0,INCH * -1,INCH * 7,INCH * -5),win32con.DT_CENTER)
pDC.EndPage()
pDC.EndDoc()
解决方法
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