[gnome-usage] header-bar: Add filter processes button

[Petr Štětka <pstetka src gnome org>]

commit 215174681e0adda25c9e1c6910d072f27f0270c6
Author: Petr Štětka <pstetka redhat com>
Date:   Fri Apr 27 12:03:00 2018 +0200

    header-bar: Add filter processes button
    
    Add MenuButton to headerbar in performance tab for grouping system
    processes or showing all processes.

 data/ui/header-bar.ui | 28 ++++++++++++++++++++++++++++
 src/application.vala  | 14 +++++++++++++-
 src/header-bar.vala   |  6 +++++-
 3 files changed, 46 insertions(+), 2 deletions(-)
---
diff --git a/data/ui/header-bar.ui b/data/ui/header-bar.ui
index b086595..843cf71 100644
--- a/data/ui/header-bar.ui
+++ b/data/ui/header-bar.ui
@@ -63,6 +63,19 @@
       </packing>
     </child>
 
+    <child>
+      <object class="GtkMenuButton" id="performance_filter_button">
+        <property name="visible">True</property>
+        <property name="can_focus">True</property>
+        <property name="use_popover">True</property>
+        <property name="direction">none</property>
+        <property name="menu-model">performance-filter-menu</property>
+      </object>
+      <packing>
+        <property name="pack-type">end</property>
+      </packing>
+    </child>
+
     <child>
       <object class="GtkToggleButton" id="performance_search_button">
         <property name="visible">True</property>
@@ -110,5 +123,20 @@
       </packing>
     </child>
   </template>
+
+  <menu id="performance-filter-menu">
+    <section>
+      <item>
+        <attribute name="label" translatable="yes">Group system processes</attribute>
+        <attribute name="action">app.filter-processes</attribute>
+        <attribute name="target">group-system</attribute>
+      </item>
+      <item>
+        <attribute name="label" translatable="yes">Show all processes</attribute>
+        <attribute name="action">app.filter-processes</attribute>
+        <attribute name="target">show-all</attribute>
+      </item>
+    </section>
+  </menu>
 </interface>
 
diff --git a/src/application.vala b/src/application.vala
index 4afeb35..152b02a 100644
--- a/src/application.vala
+++ b/src/application.vala
@@ -30,7 +30,8 @@ namespace Usage
         {
           { "about", on_about },
           { "search", on_search },
-          { "quit", on_quit }
+          { "quit", on_quit },
+          { "filter-processes", on_activate_radio, "s", "'group-system'", change_filter_processes_state }
         };
 
         public Application ()
@@ -95,5 +96,16 @@ namespace Usage
         {
             window.get_header_bar().action_on_search();
         }
+
+        private void on_activate_radio (GLib.SimpleAction action, GLib.Variant? state)
+        {
+            action.change_state(state);
+        }
+
+        private void change_filter_processes_state(GLib.SimpleAction action, GLib.Variant? state)
+        {
+            action.set_state(state);
+            //TODO here change filtering
+        }
     }
 }
diff --git a/src/header-bar.vala b/src/header-bar.vala
index 17d8f39..15da81b 100644
--- a/src/header-bar.vala
+++ b/src/header-bar.vala
@@ -34,6 +34,9 @@ namespace Usage
         [GtkChild]
         private Gtk.StackSwitcher stack_switcher;
 
+        [GtkChild]
+        private Gtk.MenuButton performance_filter_button;
+
         [GtkChild]
         private Gtk.ToggleButton performance_search_button;
 
@@ -77,6 +80,7 @@ namespace Usage
             switch(this.mode)
             {
                 case HeaderBarMode.PERFORMANCE:
+                    performance_filter_button.hide ();
                     performance_search_button.hide ();
                     break;
                 case HeaderBarMode.STORAGE:
@@ -91,7 +95,7 @@ namespace Usage
             {
                 case HeaderBarMode.PERFORMANCE:
                     show_stack_switcher();
-
+                    performance_filter_button.show();
                     performance_search_button.show();
                     break;
                 case HeaderBarMode.STORAGE: