[gnome-usage] Add icons to the pages

[Adrien Plazas <aplazas src gnome org>]

commit 058112190c4b33bc0c578bf7918d6e3b00872ad5
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Tue Sep 10 19:16:19 2019 +0200

    Add icons to the pages
    
    This makes the view switcher look better.

 src/performance-view.vala     | 1 +
 src/storage/storage-view.vala | 1 +
 src/view.vala                 | 1 +
 src/window.vala               | 4 +++-
 4 files changed, 6 insertions(+), 1 deletion(-)
---
diff --git a/src/performance-view.vala b/src/performance-view.vala
index ca30809..555dbde 100644
--- a/src/performance-view.vala
+++ b/src/performance-view.vala
@@ -46,6 +46,7 @@ namespace Usage
         {
             name = "PERFORMANCE";
             title = _("Performance");
+            icon_name = "speedometer-symbolic";
 
             sub_views = new View[]
             {
diff --git a/src/storage/storage-view.vala b/src/storage/storage-view.vala
index 6449c1a..6e11780 100644
--- a/src/storage/storage-view.vala
+++ b/src/storage/storage-view.vala
@@ -76,6 +76,7 @@ public class Usage.StorageView : Usage.View {
     construct {
         name = "STORAGE";
         title = _("Storage");
+        icon_name = "drive-harddisk-symbolic";
 
         try {
             connection = Sparql.Connection.get ();
diff --git a/src/view.vala b/src/view.vala
index e1c8f98..997197c 100644
--- a/src/view.vala
+++ b/src/view.vala
@@ -23,6 +23,7 @@ namespace Usage
     public abstract class View : Gtk.Bin
     {
         public string title;
+        public string icon_name;
 
         protected View ()
         {
diff --git a/src/window.vala b/src/window.vala
index 338eb29..6b00116 100644
--- a/src/window.vala
+++ b/src/window.vala
@@ -66,8 +66,10 @@ namespace Usage
                 new StorageView(),
             };
 
-            foreach(var view in views)
+            foreach(var view in views) {
                 stack.add_titled(view, view.name, view.title);
+                stack.child_set (view, "icon-name", view.icon_name, null);
+            }
 
             stack.notify.connect(() => {
                 if(stack.visible_child_name == views[Views.PERFORMANCE].name)