157 lines
4.6 KiB
Markdown
157 lines
4.6 KiB
Markdown
# A widget for the Awesome Window Manager to display power devices with UPower and DBus
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This widget uses the
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[`upower_dbus`](https://luarocks.org/modules/stefano-m/upower_dbus)
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library.
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# Requirements
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In addition to the requirements listed in the `rockspec` file, you will need
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the [Awesome Window Manager](https://awesomewm.org)
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and UPower (for more information about this, see the
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[`upower_dbus`](https://luarocks.org/modules/stefano-m/upower_dbus)
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documentation).
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# Installation
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The easiest way to install this widget is to use `luarocks`:
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luarocks install power_widget
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You can use the `--local` option if you don't want or can't install
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it system-wide
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This will ensure that all its dependencies are installed.
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Note that if you install with `--local` you will have to make sure that the
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`LUA_PATH` environment variable includes the local luarocks path. This can be
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achieved by `eval`ing the command `luarocks path --bin` **before** Awesome is
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started.
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For example, if you start Awesome from the Linux console (e.g. `xinit
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awesome`) and you use `zsh`, you can add the following lines to your
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`~/.zprofile`:
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``` shell
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if (( $+commands[luarocks] )); then
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eval `luarocks path --bin`
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fi
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```
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If you use `bash`, you can add the following lines to your `~/.bash_profile`:
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``` shell
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if [[ -n "`which luarocks 2>/dev/null`" ]]; then
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eval `luarocks path --bin`
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fi
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```
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If you use
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an [X Display Manager](https://en.wikipedia.org/wiki/Display_manager) you will
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need to do what explained above in your `~/.xprofile` or `~/.xinitrc`. See the
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documentation of your display manager of choice for more information.
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# Configuration
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The widget will display the battery icons defined in your GTK+ theme and it
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will resize them to fit in the available space. This means that you can switch
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your icon theme, for example using `lxappearance`, and update the widget by
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restarting AwesomeWM.
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You can specify a GUI client to be launched when the widget is right-clicked.
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This can be done by changing the `gui_client` field of the widget. The default
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is to have no client. For example, you could use the [XFCE4 Power
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Manager](http://goodies.xfce.org/projects/applications/xfce4-power-manager) or
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the [GNOME one](https://projects.gnome.org/gnome-power-manager/).
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You can set the critical battery percentage at which a warning will be
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displayed using the `critical_percentage` property (defaults to `5`).
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# Mouse controls
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When the widget is focused:
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* Right button: launches GUI client (defined by the `gui_client` field; defaults to the empty string, so nothing will happen)
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# Tooltip
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A tooltip with the current device power status shown.
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# Usage
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Add the following to your `~/.config/awesome/rc.lua`:
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Require the module:
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```lua
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-- require *after* `beautiful.init` or the theme will be inconsistent!
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local power = require("power_widget")
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-- override the GUI client.
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power.gui_client = "xfce4-power-manager"
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-- override the critical battery percentage
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power.critical_percentage = 18
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power:init()
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```
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Add the widget to your layout:
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* Awesome 3.5.x `rc.lua`
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```lua
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right_layout:add(power)
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```
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* Awesome 4.x `rc.lua`
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```lua
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-- Add widgets to the wibox
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s.mywibox:setup {
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layout = wibox.layout.align.horizontal,
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{ -- Left widgets
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layout = wibox.layout.fixed.horizontal,
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s.mytaglist,
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s.mypromptbox,
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},
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s.mytasklist, -- Middle widget
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{ -- Right widgets
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layout = wibox.layout.fixed.horizontal,
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-- other widgets
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power,
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},
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}
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```
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## Working Around `attempt to call field 'new' (a nil value)` error
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This widget has a transitive dependency on
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[lua-enum](https://github.com/stefano-m/lua-enum) that exposes a module called
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`enum.lua`. Unfortunately, the lgi library has a module with the same name and
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your AwesomeWM might have that module in the path *before* the one needed by
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this widget. In that case, loading the widget will result in a error saying
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something like `attempt to call field 'new' (a nil value)`.
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In that case, you can try to rewrite `package.path` in your `rc.lua` as
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follows:
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``` lua
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local ok, power = pcall(require, "power_widget")
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if not ok then
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local gears = require("gears")
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local table = table
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-- Reverse package.path so that our enum.lua is found before LGI's
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local paths = gears.string.split(package.path, ';')
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package.path = table.concat(gears.table.reverse(paths), ';')
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package.loaded.enum = nil -- "Unload" LGI's enum
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power = require("power_widget") -- Try again
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end
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```
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# Contributing
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This project is developed in the author's spare time. Contributions in the form
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of issues, patches and pull requests are welcome.
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