添加带有多个小部件链接的右键单击上下文菜单？ [英] Adding a right click context menu with link with multiple widgets?

问题描述

我的问题是这个问题

我想获得右键单击要对其执行操作的小部件。

I would like to get the widget which has been right clicked to do an action on it.

条件：

1. 右键单击我的标签2


2. 选择显示标签

预期结果：

=>应该打印我的标签2

=> "my label 2" should be printed

要解决的初始代码：

from Tkinter import * # Tkinter -> tkinter in Python 3

root = Tk()

def print_label():
    print "Please, help me to print the label which has been clicked !"

def popup(event):
    menu.post(event.x_root, event.y_root)


# create a popup menu
menu = Menu(root, tearoff=0)
menu.add_command(label="Display the label", command=print_label)


# create the 3 labels
label1_text=StringVar()
label2_text=StringVar()
label3_text=StringVar()

label1_text.set("my label 1")
label2_text.set("my label 2")
label3_text.set("my label 3")

label1=Label(root, textvariable=label1_text)
label2=Label(root, textvariable=label2_text)
label3=Label(root, textvariable=label3_text)

label1.pack()
label2.pack()
label3.pack()

# attach popup to frame
label1.bind("<Button-3>", popup)
label2.bind("<Button-3>", popup)
label3.bind("<Button-3>", popup)

root.mainloop()

推荐答案

对当前代码进行尽可能少的更改，您需要这三件事：

Making as few changes as possible to the current code, you need to do three things:

1. 创建一个全局变量来保存对当前所选标签的引用。

1. Create a global variable to hold a reference to the currently selected label.

在 popup 内，将此变量设置为 event.widget ，将

Inside popup, set this variable to event.widget, which will be the currently selected label.

在 print_label 内，通过访问其<$ c $打印此标签的文本c>文本 键。

下面是程序的固定版本。我更改的内容在注释框中：

Below is a fixed version of your program. The stuff I changed is in the comment box:

from Tkinter import * # Tkinter -> tkinter in Python 3

root = Tk()

#############################################################
selected = None  # This is the variable mentioned in step 1

def print_label():
    print selected["text"]  # This is step 3

def popup(event):
    global selected  # Tell Python that selected is global

    menu.post(event.x_root, event.y_root)

    selected = event.widget  # This is step 2
#############################################################

# create a popup menu
menu = Menu(root, tearoff=0)
menu.add_command(label="Display the label", command=print_label)


# create the 3 labels
label1_text=StringVar()
label2_text=StringVar()
label3_text=StringVar()

label1_text.set("my label 1")
label2_text.set("my label 2")
label3_text.set("my label 3")

label1=Label(root, textvariable=label1_text)
label2=Label(root, textvariable=label2_text)
label3=Label(root, textvariable=label3_text)

label1.pack()
label2.pack()
label3.pack()

# attach popup to frame
label1.bind("<Button-3>", popup)
label2.bind("<Button-3>", popup)
label3.bind("<Button-3>", popup)

root.mainloop()

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