python - Single click blocks double click in tkinter

Question

I have a GUI where I bind two events to a label like this:

self.label.bind('<Button-1>', self.single)
self.label.bind('<Double-1>', self.double)

the problem is that, even if I double click the label, the 'double' function isn't called, and the 'single' function is called twice.

It looks like the single click event is blocking the double click event as, if I remove the single click event line, I can normally call the 'double' function.

I read the docs and from what I got it should catch both events, but this is not the case.

Anyway, I tried this simple script and it catches both events

from tkinter import *

def single(event):
   print('single click')

def double(event):       
   print('double click')

widget = Button(None, text='Hello event world')
widget.pack()
widget.bind('<Button-1>', single)
widget.bind('<Double-1>', double)
widget.mainloop()

Then I don't understand why it doesn't work in the first script. I can post the entire file if needed. Thank you :)

Original File: https://github.com/matte980/ExplorerFile/blob/main/ObjectsPublish.py

question from:https://stackoverflow.com/questions/65944956/single-click-blocks-double-click-in-tkinter

Answer 1

Ok, so the problem is that when you make the first click you are calling move() which calls elements(), which recreates all the widgets. Therefore your second click is the first click to a new widget.

To solve this you need to update the widget properties, instead of recreating the widgets with new properties. For example, to update the background colors:

def select(self, event):
    print('selected')
    for folder in folderList:
        if folder.backgroundColor != '#ffffff':
            folder.chg_background('#ffffff')
    self.chg_background('#ffff00')

def chg_background(self, color):
    self.backgroundColor = color
    self.image.config(bg = color)
    self.label.config(bg = color)
    self.frame.config(bg = color)

This will also solve the problem of your program lagging after long use.