[libadwaita/wip/exalm/levelbars: 6/7] stylesheet: Add a disabled state for levelbars

[Alexander Mikhaylenko <alexm src gnome org>]

commit 37bc98516c037bd14dd07ad5327f8d97061b35a2
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Thu May 20 02:54:38 2021 +0500

    stylesheet: Add a disabled state for levelbars

 src/stylesheet/widgets/_level-bar.scss | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/src/stylesheet/widgets/_level-bar.scss b/src/stylesheet/widgets/_level-bar.scss
index 00079a3b..aca00aab 100644
--- a/src/stylesheet/widgets/_level-bar.scss
+++ b/src/stylesheet/widgets/_level-bar.scss
@@ -2,6 +2,10 @@ $_levelbar_size: 11px;
 $_levelbar_border_radius: 6px;
 
 levelbar {
+  &:disabled {
+    filter: opacity(.5);
+  }
+
   &.horizontal {
     trough > block {
       min-height: $_levelbar_size;