python学习笔记（Tkinter编程利用Treeview实现表格自动更新）

博主今天总结这段时间抽空写的一个GUI编程项目

功能是查看本地打印机队列，可选择指定队列重新打印

直接上图

UI设计包括3个区域左上方，右上方和下方列表区域

使用网格grid方法来分配位置

下面是界面设计的代码

 #!/usr/bin/env python
 # -*- coding: utf-8 -*-

 from Tkinter import *
 from printer_pywin32 import PrinterPywin32
 import ttk

 class PrinterTkinter:
     def __init__(self):
         self.root = Tk()
         self.root.title("打印机监控系统")

         self.frame_left_top = Frame(width=400, height=200)
         self.frame_right_top = Frame(width=400, height=200)
         self.frame_center = Frame(width=800, height=400)
         self.frame_bottom = Frame(width=800, height=50)

         # 定义左上方区域
         self.left_top_title = Label(self.frame_left_top, text="打印状态:", font=('Arial', 25))
         self.left_top_title.grid(row=0, column=0, columnspan=2, sticky=NSEW, padx=50, pady=30)

         self.var_success = StringVar()  # 声明成功数
         self.var_false = StringVar()    # 声明失败数

         self.left_top_frame = Frame(self.frame_left_top)
         self.left_top_frame_left1 = Label(self.frame_left_top, text="打印成功数", font=('Arial', 20))
         self.left_top_frame_left2 = Label(self.frame_left_top, textvariable=self.var_success, font=('Arial', 15))
         self.get_success()  # 调用方法更新成功数
         self.left_top_frame_right1 = Label(self.frame_left_top, text="打印失败数", font=('Arial', 20))
         self.left_top_frame_right2 = Label(self.frame_left_top, textvariable=self.var_false, font=('Arial', 15))
         self.get_false()    # 调用方法更新失败数
         self.left_top_frame_left1.grid(row=1, column=0)
         self.left_top_frame_left2.grid(row=1, column=1)
         self.left_top_frame_right1.grid(row=2, column=0)
         self.left_top_frame_right2.grid(row=2, column=1)

         # 定义右上方区域
         self.var_entry = StringVar()

         self.right_top_title = Label(self.frame_right_top, text="重新打印的任务编号：", font=('Arial', 20))
         self.right_top_entry = Entry(self.frame_right_top, textvariable=self.var_entry)

         self.number = int
         self.right_top_button = Button(self.frame_right_top, text="确定", command=self.button_restart, font=('Arial', 15))
         self.right_top_title.grid(row=0, column=0)
         self.right_top_entry.grid(row=1, column=0)
         self.right_top_button.grid(row=2, column=0, padx=20, pady=20)

         # 定义中心列表区域
         self.tree = ttk.Treeview(self.frame_center, show="headings", height=18, columns=("a", "b", "c", "d", "e"))
         self.vbar = ttk.Scrollbar(self.frame_center, orient=VERTICAL, command=self.tree.yview)
         # 定义树形结构与滚动条
         self.tree.configure(yscrollcommand=self.vbar.set)

         # 表格的标题
         self.tree.column("a", width=50, anchor="center")
         self.tree.column("b", width=200, anchor="center")
         self.tree.column("c", width=200, anchor="center")
         self.tree.column("d", width=100, anchor="center")
         self.tree.column("e", width=150, anchor="center")
         self.tree.heading("a", text="编号")
         self.tree.heading("b", text="打印时间")
         self.tree.heading("c", text="打印名称")
         self.tree.heading("d", text="打印任务编号")
         self.tree.heading("e", text="打印状态")

         # 调用方法获取表格内容插入
         self.get_tree()
         self.tree.grid(row=0, column=0, sticky=NSEW)
         self.vbar.grid(row=0, column=1, sticky=NS)

         # 整体区域定位
         self.frame_left_top.grid(row=0, column=0, padx=2, pady=5)
         self.frame_right_top.grid(row=0, column=1, padx=30, pady=30)
         self.frame_center.grid(row=1, column=0, columnspan=2, padx=4, pady=5)
         self.frame_bottom.grid(row=2, column=0, columnspan=2)

         self.frame_left_top.grid_propagate(0)
         self.frame_right_top.grid_propagate(0)
         self.frame_center.grid_propagate(0)
         self.frame_bottom.grid_propagate(0)

         self.root.mainloop()

     # 得到打印成功数
     def get_success(self):
         self.var_success.set(PrinterPywin32.get_success())
         self.left_top_frame_left2.after(500, self.get_success)

     # 得到打印失败数
     def get_false(self):
         self.var_false.set(PrinterPywin32.get_false())
         self.left_top_frame.after(500, self.get_false)

     # 表格内容插入
     def get_tree(self):
         # 删除原节点
         for _ in map(self.tree.delete, self.tree.get_children("")):
             pass
         # 更新插入新节点
         for i in range(len(PrinterPywin32.get_enumjobs())):
             self.tree.insert("", "end", values=(i + 1, PrinterPywin32.get_enumjobs()[i]["Submitted"],
                                                 PrinterPywin32.get_enumjobs()[i]["pPrinterName"],
                                                 PrinterPywin32.get_enumjobs()[i]["JobId"],
                                                 PrinterPywin32.get_enumjobs()[i]["Status"]))
         self.tree.after(500, self.get_tree)

     # 重新打印
     def button_restart(self):
         self.number = self.right_top_entry.get()
         PrinterPywin32.printer_restart(self.number)

 if __name__ == '__main__':
     PrinterTkinter()

这里实现了Label控件标题文字的定时更新与表格内容的自动更新