Loading custom css

Cargo.toml

@@ -5,6 +5,7 @@ version = "0.1.0"
 
 [dependencies]
 chrono = "0.4.0"
+gdk = "0.6.0"
 gdk-pixbuf = "0.2.0"
 gio = "0.2.0"
 glib = "0.3.1"

res/app.css

@@ -0,0 +1,8 @@
+.rooms {
+    background-color: alpha(@borders, 0.25);
+}
+
+.rooms:selected {
+  color: white;
+  background-color: @theme_selected_bg_color;
+}

res/main_window.glade

@@ -66,6 +66,9 @@
                     <property name="can_focus">False</property>
                     <child>
                       <object class="GtkTreeView" id="rooms_tree_view">
+                        <style>
+                          <class name="rooms"/>
+                        </style>
                         <property name="visible">True</property>
                         <property name="can_focus">True</property>
                         <property name="model">rooms_tree_store</property>

src/app.rs

@@ -5,6 +5,7 @@ extern crate gdk_pixbuf;
 extern crate secret_service;
 extern crate libnotify;
 extern crate chrono;
+extern crate gdk;
 
 use self::chrono::prelude::*;
 
@@ -1476,6 +1477,13 @@ impl App {
         glib::set_application_name("guillotine");
         glib::set_prgname(Some("guillotine"));
 
+        let provider = gtk::CssProvider::new();
+        let uri = "res/app.css";
+        if let Err(_) = provider.load_from_path(uri) {
+            println!("Error: Failed to add application style");
+        }
+        gtk::StyleContext::add_provider_for_screen(&gdk::Screen::get_default().unwrap(), &provider, 600);
+
         gtk::main();
 
         libnotify::uninit();