我的问题是对this question
的一种跟进我想获取右键单击的小部件对其执行操作。
条件:
预期结果:
=>应该打印“我的标签2”
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()
答案 0 :(得分:2)
对当前代码进行尽可能少的更改,您需要做三件事:
创建一个全局变量来保存对当前所选标签的引用。
在popup
内,将此变量设置为event.widget
,这将是当前选定的标签。
在print_label
内,通过访问其"text"
键打印此标签的文字。
以下是您的程序的固定版本。我更改的内容在评论框中:
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()