CODEWITHSUNDEEP
pythontkinterdynamiclistboxlabel
Kim minseong
Kim minseong

Reputation: 5

How can I make the tkinter label(selected in the listbox) dynamic?

newWindow = Toplevel(app)
newWindow.geometry("400x400+580+190")
Label(newWindow, text="choose the food").pack()
choice = Listbox(newWindow)
choice.pack()
food_f = open("food.txt")
for line in food_f:
    f = {}
    (f['food'], f['unit'], f['kcal'], f['standard']) = line.split(";")
    choice.insert(END, f['food'])
t = StringVar()
t.set(choice.curselection())
Label(newWindow,textvariable=t).pack()

I want the label to print out in real time what is selected in the list box. But above code can't.

Upvotes: 0

Views: 63

Answers (1)

Bryan Oakley
Bryan Oakley

Reputation: 385900

You can create a binding on the virtual event <<ListboxSelect>>, and from within the bound function you can get the selected item and update the label using the configure method.

For example, given a listbox named listbox and a label named label, you can update the label like this when the selection changes:

def update_label(event):
    curselection = listbox.curselection()
    if curselection:
        data = listbox.get(curselection[0])
        label.configure(text=data)
    else:
        label.configure(text="")

listbox.bind("<<ListboxSelect>>", update_label)

Upvotes: 1

Related Questions