tkinter应用程序添加右键单击上下文菜单？

Answer 1

您将创建一个Menu实例并编写一个调用
它的^{}或^{}方法。

tkinter documentation当前没有关于tk_popup()的任何信息。
请阅读Tk documentation以获取描述或源：

^{} in the Tcl/Tk source：

::tk_popup --
This procedure pops up a menu and sets things up for traversing
the menu and its submenus.

Arguments:
menu  - Name of the menu to be popped up.
x, y  - Root coordinates at which to pop up the menu.  
entry - Index of a menu entry to center over (x,y).  
        If omitted or specified as {}, then menu's  
        upper-left corner goes at (x,y).  

^{} in the Python source：

def tk_popup(self, x, y, entry=""):
    """Post the menu at position X,Y with entry ENTRY."""
    self.tk.call('tk_popup', self._w, x, y, entry)

将上下文菜单调用函数与右键单击关联，通过：
^{}。

但是，与右键单击相关联的数字在每个平台上都不相同。

^{} in the Tcl/Tk source：

On Darwin/Aqua, buttons from left to right are 1,3,2.  
On Darwin/X11 with recent XQuartz as the X server, they are 1,2,3; 
other X servers may differ.

下面是我编写的将上下文菜单添加到列表框的示例：

import tkinter # Tkinter -> tkinter in Python 3

class FancyListbox(tkinter.Listbox):

    def __init__(self, parent, *args, **kwargs):
        tkinter.Listbox.__init__(self, parent, *args, **kwargs)

        self.popup_menu = tkinter.Menu(self, tearoff=0)
        self.popup_menu.add_command(label="Delete",
                                    command=self.delete_selected)
        self.popup_menu.add_command(label="Select All",
                                    command=self.select_all)

        self.bind("<Button-3>", self.popup) # Button-2 on Aqua

    def popup(self, event):
        try:
            self.popup_menu.tk_popup(event.x_root, event.y_root, 0)
        finally:
            self.popup_menu.grab_release()

    def delete_selected(self):
        for i in self.curselection()[::-1]:
            self.delete(i)

    def select_all(self):
        self.selection_set(0, 'end')


root = tkinter.Tk()
flb = FancyListbox(root, selectmode='multiple')
for n in range(10):
    flb.insert('end', n)
flb.pack()
root.mainloop()

在an example on effbot中观察到grab_release()的使用 它对所有系统的影响可能并不相同。

Answer 2

为了调整我的需求，我对上面的conext菜单代码做了一些修改，我想分享一下：

版本1：

import tkinter as tk
from tkinter import ttk

class Main(tk.Frame):
    def __init__(self, master):
        tk.Frame.__init__(self, master)
        master.geometry('500x350')
        self.master = master
        self.tree = ttk.Treeview(self.master, height=15)
        self.tree.pack(fill='x')
        self.btn = tk.Button(master, text='click', command=self.clickbtn)
        self.btn.pack()
        self.aMenu = tk.Menu(master, tearoff=0)
        self.aMenu.add_command(label='Delete', command=self.delete)
        self.aMenu.add_command(label='Say Hello', command=self.hello)

        # attach popup to treeview widget
        self.tree.bind("<Button-3>", self.popup)

    def clickbtn(self):
        text = 'Hello ' + str(self.num)
        self.tree.insert('', 'end', text=text)
        self.num += 1

    def delete(self):
        print(self.tree.focus())
        if self.iid:
            self.tree.delete(self.iid)

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

    def popup(self, event):
        self.iid = self.tree.identify_row(event.y)
        if self.iid:
            # mouse pointer over item
            self.tree.selection_set(self.iid)
            self.aMenu.post(event.x_root, event.y_root)            
        else:
            pass

版本2：

import tkinter as tk
from tkinter import ttk

class Main(tk.Frame):
    def __init__(self, master):
        master.geometry('500x350')
        self.master = master
        tk.Frame.__init__(self, master)
        self.tree = ttk.Treeview(self.master, height=15)
        self.tree.pack(fill='x')
        self.btn = tk.Button(master, text='click', command=self.clickbtn)
        self.btn.pack()
        self.rclick = RightClick(self.master)
        self.num = 0

        # attach popup to treeview widget
        self.tree.bind('<Button-3>', self.rclick.popup)
    def clickbtn(self):
        text = 'Hello ' + str(self.num)
        self.tree.insert('', 'end', text=text)
        self.num += 1

class RightClick:
    def __init__(self, master):

        # create a popup menu
        self.aMenu = tk.Menu(master, tearoff=0)
        self.aMenu.add_command(label='Delete', command=self.delete)
        self.aMenu.add_command(label='Say Hello', command=self.hello)

        self.tree_item = ''

    def delete(self):
        if self.tree_item:
            app.tree.delete(self.tree_item)

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

    def popup(self, event):
        self.aMenu.post(event.x_root, event.y_root)
        self.tree_item = app.tree.focus()

root = tk.Tk()
app=Main(root)
root.mainloop()