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# Brightness widget
This widget represents current brightness level: 
## Customization
It is possible to customize widget by providing a table with all or some of the following config parameters:
| Name | Default | Description |
|---|---|---|
| `get_brightness_cmd` | `light -G` | Get current screen brightness |
| `inc_brightness_cmd` | `light -A 5` | Increase brightness |
| `dec_brightness_cmd` | `light -U 5`| Decrease brightness |
| `color` | `beautiful.fg_color` | Color of the arc |
| `bg_color` | `#ffffff11` | Color of the arc's background |
| `path_to_icon` | `/usr/share/icons/Arc/status/symbolic/display-brightness-symbolic.svg` | Path to the icon |
| `timeout` | 1 | How often in seconds the widget refreshes |
### Example:
```lua
brightnessarc_widget({
get_brightness_cmd = 'xbacklight -get',
inc_brightness_cmd = 'xbacklight -inc 5',
dec_brightness_cmd = 'xbacklight -dec 5'
color = '/usr/share/icons/Arc/status/symbolic/brightness-display-symbolic.svg'
})
```
## Installation
First you need to get the current brightness level. There are two options:
- using `xbacklight` command (depending on your video card (I guess) it may or may not work)
To check if it works install xbackligth and check if it works:
```bash
sudo apt-get install xbacklight
xbacklight -get
```
If there is no output it means that it doesn't work, but there is a second option:
- using `light` command
Install it from this git repo: [github.com/haikarainen/light](https://github.com/haikarainen/light) and check if it works but running
```bash
git clone https://github.com/haikarainen/light.git && \
cd ./light && \
sudo make && sudo make install \
light -G
49.18
```
Then clone this repo under **~/.config/awesome/**:
```bash
git clone https://github.com/streetturtle/awesome-wm-widgets.git ~/.config/awesome/awesome-wm-widgets
```
Require widget at the beginning of **rc.lua**:
```lua
local brightnessarc_widget = require("awesome-wm-widgets.brightnessarc-widget.brightnessarc")
```
Add widget to the tasklist:
```lua
s.mytasklist, -- Middle widget
{ -- Right widgets
layout = wibox.layout.fixed.horizontal,
...
-- default
brightnessarc_widget(),
-- or customized
brightnessarc_widget({
get_brightness_cmd = 'xbacklight -get',
inc_brightness_cmd = 'xbacklight -inc 5',
dec_brightness_cmd = 'xbacklight -dec 5'
})
}
...
```
## Controls
In order to change brightness by shortcuts you can add them to the `globalkeys` table in the **rc.lua**:
```lua
awful.key({ modkey }, ";", function () awful.spawn("light -A 5") end, {description = "increase brightness", group = "custom"}),
awful.key({ modkey, "Shift"}, ";", function () awful.spawn("light -U 5") end, {description = "decrease brightness", group = "custom"}),
```
On laptop you can use `XF86MonBrightnessUp` and `XF86MonBrightnessDown` keys.
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