awesomewm/modules/backlight/widget.lua

local backlight = req_rel(..., "util")
local widget = {}


widget.icon = wibox.widget {
	id = "icon",
	image = beautiful.icons.brightness.i,
	resize = true,
	widget = wibox.widget.imagebox,
}

widget.arc = wibox.widget {
	{
		widget.icon,
		top = beautiful.dpi(1),
		bottom = beautiful.dpi(1),
		layout = wibox.container.margin,
	},
	max_value = 100,
	thickness = beautiful.dpi(4),
	start_angle = 4.71238898, -- 2pi*3/4
	--forced_height = beautiful.dpi(16),
	--forced_width = beautiful.dpi(16),
	colors = {"#27D4CC", "#00446B"},
	bg = "#FFFFFF30",
	paddings = beautiful.dpi(2),
	widget = wibox.container.arcchart
}


widget.widget = wibox.widget {
	{
		{   -- Right space
			widget = wibox.widget.separator,
			color = beautiful.color.transparent,
			forced_width = beautiful.dpi(3)
		},
		{   -- Main indicator. Can be replaced with widget.arc
			widget.arc,
			top = beautiful.dpi(2),
			bottom = beautiful.dpi(2),
			layout = wibox.container.margin,
		},
		{   -- Left space
			widget = wibox.widget.separator,
			color = beautiful.color.transparent,
			forced_width = beautiful.dpi(3)
		},
		layout = wibox.layout.align.horizontal,
	},
	layout = wibox.container.background,
}

widget.widget:connect_signal("mouse::enter", function(result)
	widget.widget.bg = beautiful.color.bar.hover_bg
end)

widget.widget:connect_signal("mouse::leave", function(result)
	widget.widget.bg = beautiful.color.transparent
end)

widget.widget:connect_signal("button::press",
	function(_, _, _, button, mods)
		-- Scroll up
		if (button == 4) then
			backlight.backlight_up(config.backlight.scroll_step)
		-- Scroll down
		elseif (button == 5) then
			backlight.backlight_down(config.backlight.scroll_step)
		end

		awesome.emit_signal("module::backlight:popup_show_stay")
	end
)

awesome.connect_signal("module::backlight:update",
	function(value)
		widget.arc.value = value

		if     value >= 90 then widget.icon.image = beautiful.icons.brightness.i
		elseif value >= 80 then widget.icon.image = beautiful.icons.brightness.h
		elseif value >= 70 then widget.icon.image = beautiful.icons.brightness.g
		elseif value >= 60 then widget.icon.image = beautiful.icons.brightness.f
		elseif value >= 50 then widget.icon.image = beautiful.icons.brightness.e
		elseif value >= 40 then widget.icon.image = beautiful.icons.brightness.d
		elseif value >= 30 then widget.icon.image = beautiful.icons.brightness.c
		elseif value >= 20 then widget.icon.image = beautiful.icons.brightness.b
		elseif value <= 10 then widget.icon.image = beautiful.icons.brightness.a end

	end
)

backlight.watch(
	5,
	function()
		awesome.emit_signal("module::backlight::update_read")
	end,
	widget.widget
)

return widget