Change cell background upon double taps

[Grun6]

Hello,
I am stuck at the following point and wondering if someone could shed some light:

def tableview_cell_for_row(self, tableview, section, row):
	person = self.items[row][0]
	act = self.items[row][1]
	cell = ui.TableViewCell('subtitle')
	cell.text_label.text = person.name
	cell.detail_text_label.text = act.name
	cell.text_label.font = ('Courier', 16)
	cell.detail_text_label.font = ('Courier', 11)
	cell.selectable = False
	
	g= Gestures()
	def popup(data):
		console.hud_alert("this is a test")
		data.view.background_color = 'gray'
	g.add_tap(cell, popup, numbers_of_taps_required = 2, number_of_touches_required = None)

	return cell

When I generate the cell for this tableview, I assign it a function upon double tapping the cell using the Gestures module. This all works well, the popup shows up properly.

I have disabled the "cell.selectable" because I do not want the cell to be selected with a single tap. Instead I would like the cell to give visual feedback of being selected upon double tapping, so I change the color to gray in the popup(data) function. And this works as expected as well. However I would like to get the cell's background colour to revert to white after 2 seconds. How do I go about that? I tried the time.sleep() function but that does not work. I tried threading Timer but again no success.
Any idea would be appreciated

[JonB]

ui.delay is probably your best bet.

you do need to think through what should happen if the user double taps more than once -- maybe you want to ui.cancel_delays, or else you need to keep some sort of tap count, and when the delay expires, the tap clunt is decremented, and set to white if zero.

[Grun6]

Great thank you that is exactly it.
And I'll look into ui.cancel_delays for corner cases