Tkinter Change Button Color en douceur
def fade(widget, smoothness=4, cnf={}, **kw):
"""This function will show faded effect on widget's different color options.
Args:
widget (tk.Widget): Passed by the bind function.
smoothness (int): Set the smoothness of the fading (1-10).
background (str): Fade background color to.
foreground (str): Fade foreground color to."""
kw = tk._cnfmerge((cnf, kw))
if not kw: raise ValueError("No option given, -bg, -fg, etc")
if len(kw)>1: return [fade(widget,smoothness,{k:v}) for k,v in kw.items()][0]
if not getattr(widget, '_after_ids', None): widget._after_ids = {}
widget.after_cancel(widget._after_ids.get(list(kw)[0], ' '))
c1 = tuple(map(lambda a: a/(65535), widget.winfo_rgb(widget[list(kw)[0]])))
c2 = tuple(map(lambda a: a/(65535), widget.winfo_rgb(list(kw.values())[0])))
colors = tuple(colour.rgb2hex(c, force_long=True)
for c in colour.color_scale(c1, c2, max(1, smoothness*100)))
def worker(count=0):
if len(colors)-1 <= count: return
widget.config({list(kw)[0] : colors[count]})
widget._after_ids.update( { list(kw)[0]: widget.after(
max(1, int(smoothness/10)), worker, count+1) } )
worker()
#source: https://stackoverflow.com/questions/49433315/is-there-a-wayor-a-library-for-making-a-smooth-colour-transition-in-tkinter
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