101 lines
3.1 KiB
Lua
101 lines
3.1 KiB
Lua
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---------------------------------------------------------------------------
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-- An implementation of my battery_widget widget with a dynamicly generated
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-- icon based on the battery percentage level.
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--
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-- Find more about my battery_widget widget at
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-- https://github.com/Aire-One/awesome-battery_widget
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--
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-- @author Aire-One
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-- @copyright 2020 Aire-One
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---------------------------------------------------------------------------
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local lgi = require 'lgi'
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local cairo = lgi.cairo
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local rsvg = lgi.Rsvg
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local atooltip = require 'awful.tooltip'
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local beautiful = require 'beautiful'
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local gcolor = require 'gears.color'
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local imagebox = require 'wibox.widget.imagebox'
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local battery_widget = require 'battery-widget'
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local my_battery = {}
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local mt = {}
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--- Generate a drawing for the battery icon.
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-- @tparam number percentage The percentage of battery remaining.
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-- @tparam gears.color|string color The color of the drawing.
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-- @treturn cairo.ImageSurface The generated surface for the drawing.
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function my_battery.draw_battery (percentage, color)
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local svg_handle = rsvg.Handle.new_from_file(beautiful.icon_battery_outline)
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if not svg_handle then return end
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local surface = cairo.ImageSurface.create(cairo.Format.ARGB32, 24, 24)
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local cr = cairo.Context(surface)
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svg_handle:render_cairo(cr)
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local max_height = 14
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local x = 8
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local width = 8
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local height = percentage / 100 * max_height
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local y = 6 + max_height - height
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cr:set_source(gcolor(color))
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cr:rectangle(x, y, width, height)
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cr:fill()
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return surface
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end
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--- Update handler for the battery widget. This is the function called
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-- by the signal system on battery update.
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-- @tparam my_battery widget The battery widget to update.
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-- @tparam UPowerGLib.Device device The UPower device to monitor.
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function my_battery.update (widget, device)
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widget.image = my_battery.draw_battery(device.percentage, widget.color)
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end
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--- Give the widget template for the battery widget.
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-- (It's a basic `wibox.widget.imagebox` for my battery implementation)
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function my_battery.widget_template ()
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local widget = imagebox()
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widget.resize = true
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return widget
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end
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--- Constructor of my battery widget!
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-- @tparam table args Table of parameters.
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-- @tparam screen|number args.screen The screen of the wodget.
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-- @tparam string args.device_path The path of the UPower device to monitor.
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-- @tparam gears.color|string args.color Color to use to draw the battery.
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-- @treturn my_battery The instantiated widget.
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function my_battery.new (args)
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local widget = battery_widget {
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screen = args.screen,
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device_path = args.device_path,
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widget_template = my_battery.widget_template(),
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instant_update = true
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}
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widget.color = args.color
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widget:connect_signal('upower::update', function (w, device)
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my_battery.update(w, device)
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end)
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widget.tooltip = atooltip {
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objects = { widget },
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timer_function = function ()
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return string.format('%3d', widget.device.percentage) .. '%'
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end
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}
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return widget
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end
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function mt.__call (self, ...)
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return my_battery.new(...)
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end
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return setmetatable(my_battery, mt)
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