CssProvider does not support loading multiple resources.

Author: saivert

data/resources/resources.gresource.xml

@@ -14,8 +14,7 @@
     <file preprocess="xml-stripblanks" alias="gtk/devicebox.ui">ui/devicebox.ui</file>
     <file preprocess="xml-stripblanks" alias="gtk/profilerow.ui">ui/profilerow.ui</file>
     <file preprocess="xml-stripblanks" alias="gtk/volumescale.ui">ui/volumescale.ui</file>
-    <file>ui/levelbar.css</file>
-    <file>ui/list.css</file>
+    <file>ui/styling.css</file>
   </gresource>
   <gresource prefix="/com/saivert/pwvucontrol/icons/scalable/actions">
      <file preprocess="xml-stripblanks" alias="com.saivert.pwvucontrol.svg">../icons/com.saivert.pwvucontrol.svg</file>

data/resources/ui/levelbar.css

@@ -3,3 +3,4 @@
     border: 0px;
     border-radius: 0px;
 }
+

data/resources/ui/list.css renamed to data/resources/ui/styling.css

@@ -21,7 +21,7 @@
 mod config {
     #![allow(dead_code)]
 
-    include!(concat!(env!("CODEGEN_BUILD_DIR"), "/config.rs"));
+    include!(concat!(env!("OUT_DIR"), "/config.rs"));
 }
 mod macros;
 
@@ -80,8 +80,7 @@ fn main() -> gtk::glib::ExitCode {
     gio::resources_register(&resources);
 
     let css = gtk::CssProvider::new();
-    css.load_from_resource("/com/saivert/pwvucontrol/ui/levelbar.css");
-    css.load_from_resource("/com/saivert/pwvucontrol/ui/list.css");
+    css.load_from_resource("/com/saivert/pwvucontrol/ui/styling.css");
 
     gtk::style_context_add_provider_for_display(
         &gtk::gdk::Display::default().unwrap(),

src/main.rs

@@ -31,7 +31,7 @@ endif
 
 cargo_env = [
   'CARGO_HOME=' + meson.project_build_root() / 'cargo-home',
-  'CODEGEN_BUILD_DIR=' + meson.current_build_dir()
+  'OUT_DIR=' + meson.current_build_dir()
 ]
 
 custom_target(