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
1 #!/usr/bin/env python 2 # -*- coding: utf-8 -*- 3 4 from Tkinter import * 5 from printer_pywin32 import PrinterPywin32 6 import ttk 7 8 9 class PrinterTkinter: 10 def __init__(self): 11 self.root = Tk() 12 self.root.title("打印机监控系统") 13 14 self.frame_left_top = Frame(width=400, height=200) 15 self.frame_right_top = Frame(width=400, height=200) 16 self.frame_center = Frame(width=800, height=400) 17 self.frame_bottom = Frame(width=800, height=50) 18 19 # 定义左上方区域 20 self.left_top_title = Label(self.frame_left_top, text="打印状态:", font=('Arial', 25)) 21 self.left_top_title.grid(row=0, column=0, columnspan=2, sticky=NSEW, padx=50, pady=30) 22 23 self.var_success = StringVar() # 声明成功数 24 self.var_false = StringVar() # 声明失败数 25 26 self.left_top_frame = Frame(self.frame_left_top) 27 self.left_top_frame_left1 = Label(self.frame_left_top, text="打印成功数", font=('Arial', 20)) 28 self.left_top_frame_left2 = Label(self.frame_left_top, textvariable=self.var_success, font=('Arial', 15)) 29 self.get_success() # 调用方法更新成功数 30 self.left_top_frame_right1 = Label(self.frame_left_top, text="打印失败数", font=('Arial', 20)) 31 self.left_top_frame_right2 = Label(self.frame_left_top, textvariable=self.var_false, font=('Arial', 15)) 32 self.get_false() # 调用方法更新失败数 33 self.left_top_frame_left1.grid(row=1, column=0) 34 self.left_top_frame_left2.grid(row=1, column=1) 35 self.left_top_frame_right1.grid(row=2, column=0) 36 self.left_top_frame_right2.grid(row=2, column=1) 37 38 # 定义右上方区域 39 self.var_entry = StringVar() 40 41 self.right_top_title = Label(self.frame_right_top, text="重新打印的任务编号：", font=('Arial', 20)) 42 self.right_top_entry = Entry(self.frame_right_top, textvariable=self.var_entry) 43 44 self.number = int 45 self.right_top_button = Button(self.frame_right_top, text="确定", command=self.button_restart, font=('Arial', 15)) 46 self.right_top_title.grid(row=0, column=0) 47 self.right_top_entry.grid(row=1, column=0) 48 self.right_top_button.grid(row=2, column=0, padx=20, pady=20) 49 50 # 定义中心列表区域 51 self.tree = ttk.Treeview(self.frame_center, show="headings", height=18, columns=("a", "b", "c", "d", "e")) 52 self.vbar = ttk.Scrollbar(self.frame_center, orient=VERTICAL, command=self.tree.yview) 53 # 定义树形结构与滚动条 54 self.tree.configure(yscrollcommand=self.vbar.set) 55 56 # 表格的标题 57 self.tree.column("a", width=50, anchor="center") 58 self.tree.column("b", width=200, anchor="center") 59 self.tree.column("c", width=200, anchor="center") 60 self.tree.column("d", width=100, anchor="center") 61 self.tree.column("e", width=150, anchor="center") 62 self.tree.heading("a", text="编号") 63 self.tree.heading("b", text="打印时间") 64 self.tree.heading("c", text="打印名称") 65 self.tree.heading("d", text="打印任务编号") 66 self.tree.heading("e", text="打印状态") 67 68 # 调用方法获取表格内容插入 69 self.get_tree() 70 self.tree.grid(row=0, column=0, sticky=NSEW) 71 self.vbar.grid(row=0, column=1, sticky=NS) 72 73 # 整体区域定位 74 self.frame_left_top.grid(row=0, column=0, padx=2, pady=5) 75 self.frame_right_top.grid(row=0, column=1, padx=30, pady=30) 76 self.frame_center.grid(row=1, column=0, columnspan=2, padx=4, pady=5) 77 self.frame_bottom.grid(row=2, column=0, columnspan=2) 78 79 self.frame_left_top.grid_propagate(0) 80 self.frame_right_top.grid_propagate(0) 81 self.frame_center.grid_propagate(0) 82 self.frame_bottom.grid_propagate(0) 83 84 self.root.mainloop() 85 86 # 得到打印成功数 87 def get_success(self): 88 self.var_success.set(PrinterPywin32.get_success()) 89 self.left_top_frame_left2.after(500, self.get_success) 90 91 # 得到打印失败数 92 def get_false(self): 93 self.var_false.set(PrinterPywin32.get_false()) 94 self.left_top_frame.after(500, self.get_false) 95 96 # 表格内容插入 97 def get_tree(self): 98 # 删除原节点 99 for _ in map(self.tree.delete, self.tree.get_children("")): 100 pass 101 # 更新插入新节点 102 for i in range(len(PrinterPywin32.get_enumjobs())): 103 self.tree.insert("", "end", values=(i + 1, PrinterPywin32.get_enumjobs()[i]["Submitted"], 104 PrinterPywin32.get_enumjobs()[i]["pPrinterName"], 105 PrinterPywin32.get_enumjobs()[i]["JobId"], 106 PrinterPywin32.get_enumjobs()[i]["Status"])) 107 self.tree.after(500, self.get_tree) 108 109 # 重新打印 110 def button_restart(self): 111 self.number = self.right_top_entry.get() 112 PrinterPywin32.printer_restart(self.number) 113 114 115 if __name__ == '__main__': 116 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
