Make backgrounds theme-able

Fixes visibility on light themes

Affects widgets:
- `batteryarc`
- `brightnessarc`
- `volumearc`
- `volumebar`

Fixes #109

2 files changed, 3 insertions, 1 deletions

diff --git a/volumearc-widget/README.md b/volumearc-widget/README.md
index cd0501e..58f9550 100644
--- a/volumearc-widget/README.md
+++ b/volumearc-widget/README.md
@@ -16,6 +16,7 @@ It is possible to customize widget by providing a table with all or some of the
 | Name | Default | Description |
 |---|---|---|
 | `main_color` | `beautiful.fg_normal` | Color of the arc |
+| `bg_color` | `#ffffff11` | Color of the arc's background |
 | `mute_color` | `beautiful.fg_urgent` | Color of the arc when mute |
 | `path_to_icon` | /usr/share/icons/Arc/status/symbolic/audio-volume-muted-symbolic.svg | Path to the icon |
 | `thickness` | 2 | The arc thickness |
diff --git a/volumearc-widget/volumearc.lua b/volumearc-widget/volumearc.lua
index 62b18ab..33cc99c 100644
--- a/volumearc-widget/volumearc.lua
+++ b/volumearc-widget/volumearc.lua
@@ -28,6 +28,7 @@ local function worker(args)
     local args = args or {}
 
     local main_color = args.main_color or beautiful.fg_color
+    local bg_color = args.bg_color or '#ffffff11'
     local mute_color = args.mute_color or beautiful.fg_urgent
     local path_to_icon = args.path_to_icon or PATH_TO_ICON
     local thickness = args.thickness or 2
@@ -52,7 +53,7 @@ local function worker(args)
         start_angle = 4.71238898, -- 2pi*3/4
         forced_height = height,
         forced_width = height,
-        bg = "#ffffff11",
+        bg = bg_color,
         paddings = 2,
         widget = wibox.container.arcchart
     }