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# Brightness widget
This widget represents current brightness level.
## Installation
Firstly 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
xbackligth -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
```
Depending on the chosen option change `get_brightness_cmd` variable in **brightness.lua**.
Then in **rc.lua** add the import on top of the file and then add widget to the wibox:
```lua
require("awesome-wm-widgets.brightness-widget.brightness")
...
-- Add widgets to the wibox
s.mywibox:setup {
...
{ -- Right widgets
...
brightness_widget
```
## 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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