# 导入模块
from tkinter import *
from tkinter.colorchooser import *
from tkinter.filedialog import *
#
class Application(Frame): # 父系Frame-可以包含其他小部件并具有3D边框的框架小部件
def __init__(self,master=None):
super().__init__(master)
self.master = master
self.textpad = None
self.pack()
self.createWidget() # 定义主菜单方法
self.contextMenu = None # contextMenu 上下文菜单对象
def createWidget(self):
# 创建主菜单栏
menubar = Menu(root)
#menuedit = Menu(menubar2, tearoff=1) # 菜单栏 添加菜单编辑器
#menubar2.add_cascade(label="编辑", menu=menuedit) # cascade=串联,add_cascade语句添加层次菜单项
# menuedit添加子菜单项目
#menuedit.add_command(label="剪切")
#menuedit.add_command(label="复制")
#menuedit.add_command(label="粘贴")
#创建子菜单
menuFile = Menu(menubar)
menuEdit = Menu(menubar)
menueHelp = Menu(menubar)
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=menueHelp)
# 添加子菜单项目
menuFile.add_command(label="新建",accelerator="ctel+n",command=self.test)
menuFile.add_command(label="打开", accelerator="ctel+o", command=self.test)
menuFile.add_command(label="保存", accelerator="ctel+s", command=self.test)
menuFile.add_command(label="退出", accelerator="ctel+q", command=self.test)
# 将主菜单添加到跟主窗口
root["menu"]=menubar
# 定义文字编辑区
self.textpad = Text(root,width=500,height=100)
self.textpad.pack()
root.bind("<Button-3>", self.text)
self.contextMenu = Menu(root) # 菜单2=菜单栏(root)
self.contextMenu.add_command(label="颜色", command=self.openAskColor) # 菜单添加项目颜色,并关联事件=openAskcolor
# test(event)窗口实时监测方法;
def text(self, event):
self.contextMenu.post(event.x_root, event.y_root)
# 定义一个方法用来调出背景色
def openAskColor(self):
s1 = askcolor(color="red", title="选择背景色")
self.textpad.config(bg=s1[1])
def test():
pass
menubar2 = Menu(root) # 菜单2=菜单栏(root)
# 创建菜单
# w1 = Text(root, width=500, height=300)
# w1.bind("<Button-3>", test)
if __name__ == '__main__':
root =Tk()
root.geometry("450x300+200+300")
root.title("百战程序员的简易记事本")
app = Application(master=root)
root.mainloop()
运行报错,请指导:
C:\Users\Administrator\AppData\Local\Programs\Python\Python38\python.exe "H:/python DM/MYPY_0204_GUI/notebook.py"
Exception in Tkinter callback
Traceback (most recent call last):
File "C:\Users\Administrator\AppData\Local\Programs\Python\Python38\lib\tkinter\__init__.py", line 1883, in __call__
return self.func(*args)
File "H:/python DM/MYPY_0204_GUI/notebook.py", line 66, in text
self.contextMenu.post(event.x_root, event.y_root)
AttributeError: 'NoneType' object has no attribute 'post'
Process finished with exit code 0
需要怎么改?怎么就错了?