我有一块画布。当我右键单击它时：

1. 它会返回我单击过的坐标，没关系；
2. 打开具有某些功能的弹出菜单，但距离较远（从左至上），这是一个主要问题。那没关系；

我希望此菜单在我右键单击的位置（从鼠标单击的位置右上方）旁边打开。

我应该如何指定在何处打开此菜单，或者可能需要更改某些属性？

from tkinter import *
from tkinter import ttk # for Treeview


class Main(Frame):
    def __init__(self,main):
        Frame.__init__(self,main)
        # Vars that will be defined by user:
        self.frame_width = 300
        self.frame_height = 300
        self.canvas_width = 600
        self.canvas_height = 600

        # Flexible widgets when window size alters:
        main.columnconfigure(0,weight=1)
        main.rowconfigure(0,weight=1)

        # Some text
        Label(text='Some text 1').grid(row=0,column=0)
        Label(text='Some text 2').grid(row=1,column=0)
        Label(text='Some text 3').grid(row=2,column=0)
        Label(text='Some text 4').grid(row=3,column=0)
        Label(text='Some text 5').grid(row=4,column=0)

        # Canvas and frame
        canvas_frame = Frame(main,width=self.frame_width,height=self.frame_height,relief='groove')
        canvas_frame.grid(row=1,column=1)
        canvas_frame.grid_propagate(False)
        self.canvas = Canvas(canvas_frame,width = self.canvas_width,height = self.canvas_height,bg='bisque')
        self.canvas.grid(row=0,column=0)

        # (!!!) RIGHT CLICK MENU
        self.rmenu = Menu(self.canvas,tearoff=0,takefocus=0)
        self.rmenu.add_command(label='Add',command=self.hello)
        self.canvas.bind("<ButtonPress-3>",self.popup)

        # Bind
        self.canvas.bind("<ButtonPress-1>",self.scroll_start)
        self.canvas.bind("<B1-Motion>",self.scroll_move)

        # Functions
        self.grid(self.canvas)
    # End of init function.


    # canvas popup menu: --------------------------------------------------
    # (!!!) HERE IS THE POPUP RIGHTCLICK MENU FUNCTIONS
    def popup(self,event):
        self.rmenu.tk_popup(event.x + 40,event.y + 10,entry="0")
        coords_1 = []
        coords_1 += [[event.x,event.y]]
        print(coords_1)

    def hello(self):
        print('hello')

    # grid:  --------------------------------------------------

    def grid(self,canvas):
        for l in range(0,self.canvas_width,10):
            canvas.create_line([(l,0),(l,self.canvas_width)],fill='#d9d9d9')
        for l in range(0,self.canvas_height,10):
            canvas.create_line([(0,l),(self.canvas_height,l)],fill='#d9d9d9')

    # scrolling canvas: ----------------------------------------

    def scroll_start(self,event):
        self.canvas.scan_mark(event.x,event.y)

    def scroll_move(self,event):
        self.canvas.scan_dragto(event.x,event.y,gain=1)



if __name__ == '__main__':
    main = Tk()
    # Making window opens in the centre of the screen
    w = 800
    h = 650
    ws = main.winfo_screenwidth()
    hs = main.winfo_screenheight()
    x = (ws / 2) - (w / 2)
    y = (hs / 2) - (h / 2)
    main.geometry('%dx%d+%d+%d' % (800,600,x,y))
    #
    Main(main)
    main.mainloop()

我用（!!!）和大写字母指出的所有必要部分