AwesomeWM - slider.set_value_direct

awesomewm_slider_set_value_direct.lua

-- Solution #1: Add `set_value_direct` only for the specified slider instance
local slider = wibox.widget.slider() -- ...or any other valid way to create the slider object
function slider:set_value_direct(value)
	value = math.min(math.max(value, self:get_minimum()), self:get_maximum())
	if value ~= self._private.value then
		self._private.value = value
		self:emit_signal("property::value", value, true) -- Pass an additional `true` value to the callback
		self:emit_signal("widget::redraw_needed")
	end
end

-- Solution #2: Add `set_value_direct` to all sliders (created before and after the following code has ran)
local slider_mt = wibox.widget.slider.mt
function slider_mt:set_value_direct(value)
	value = math.min(math.max(value, self:get_minimum()), self:get_maximum())
	if value ~= self._private.value then
		self._private.value = value
		self:emit_signal("property::value", value, true) -- Pass an additional `true` value to the callback
		self:emit_signal("widget::redraw_needed")
	end
end

-------------------------------------------

-- Usage:
local my_slider = wibox.widget.slider() -- Any slider instance
my_slider:connect_signal("property::value", function(value, direct)
	if direct then
		-- Value update was caused by calling `set_value_direct` aka "from code"
		-- ...
	else
		-- Value update was caused by user input
		-- ...
	end
end)