"""开发记事本软件的菜单"""
from tkinter import *
from tkinter.filedialog import *
from tkinter.colorchooser import *
class Application(Frame):
def __init__(self, master=None):
super().__init__(master)
self.master = master
self.textpad = None
self.pack()
self.createWidget()
def createWidget(self):
# 创建主菜单栏
menubar = Menu(root)
# 创建子菜单
menuFile = Menu(menubar)
menuEdit = Menu(menubar)
menuHelp = Menu(menubar)
# 将子菜单加入到主菜单栏
menubar.add_cascade(label="文件(F)", menu=menuFile)
menubar.add_cascade(label="编辑(E)", menu=menuEdit)
menubar.add_cascade(label="帮助(H)", menu=menuHelp)
# 添加菜单项
menuFile.add_command(label="新建", accelerator="ctrl+n", command=self.test)
menuFile.add_command(label="打开", accelerator="ctrl+o", command=self.test)
menuFile.add_command(label="保存", accelerator="ctrl+s", command=self.test)
menuFile.add_separator() # 添加分割线
menuFile.add_command(label="退出", accelerator="ctrl+q", command=self.test)
# 将主菜单栏加到根窗口
root["menu"] = menubar
# 文本编辑区
self.textpad = Text(root, width=50, height=30)
self.textpad.pack()
# 创建上下菜单
self.contextMenu = Menu(root)
self.contextMenu.add_command(label="背景颜色", command=self.test)
# 为右键绑定事件
root.bind("<Button-3>", self.createContextMenu)
def test(self):
pass
def createContextMenu(self, event):
# 菜单在鼠标右键单击的坐标处显示
self.contextMenu.post(event.x_root, event.y_root)
if __name__ == "__main__":
root = Tk()
root.geometry("450x+300+200+300")
root.title("记事本")
app = Application(master=root)
root.mainloop()
老师为什么我的这个运行不了，问题出在哪里啊
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