[gnome-boxes] selectionbar: Add 'Open in new windows' button

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit b0e2fc3fb0c4afa8739d877345db7ad7a4da4560
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Tue Aug 12 08:38:31 2014 +0200

    selectionbar: Add 'Open in new windows' button
    
    This is needed to make multiple windows possible.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=734486

 data/ui/selectionbar.ui |   17 +++++++++++++++++
 src/app.vala            |   22 ++++++++++++++++++++++
 src/selectionbar.vala   |   19 +++++++++++++++++++
 3 files changed, 58 insertions(+), 0 deletions(-)
---
diff --git a/data/ui/selectionbar.ui b/data/ui/selectionbar.ui
index 48b506d..0583012 100644
--- a/data/ui/selectionbar.ui
+++ b/data/ui/selectionbar.ui
@@ -52,6 +52,23 @@
           </packing>
         </child>
 
+        <!-- Open in new windows button -->
+        <child>
+          <object class="GtkButton" id="open_btn">
+            <property name="visible">True</property>
+            <property name="valign">center</property>
+            <property name="use-underline">True</property>
+            <signal name="clicked" handler="on_open_btn_clicked"/>
+            <style>
+              <class name="text-button"/>
+            </style>
+          </object>
+
+          <packing>
+            <property name="pack-type">start</property>
+          </packing>
+        </child>
+
         <!-- Remove button -->
         <child>
           <object class="GtkButton" id="remove_btn">
diff --git a/src/app.vala b/src/app.vala
index 2917865..63575f8 100644
--- a/src/app.vala
+++ b/src/app.vala
@@ -311,6 +311,28 @@ private class Boxes.App: Gtk.Application {
         return false;
     }
 
+    public void open_selected_items_in_new_window () {
+        var selected_items = main_window.view.get_selected_items ();
+
+        main_window.selection_mode = false;
+
+        foreach (var item in selected_items) {
+            if (item is Machine)
+                open_in_new_window (item as Machine);
+        }
+    }
+
+    private void open_in_new_window (Machine machine) {
+        if (machine.window != main_window) {
+            machine.window.present ();
+
+            return;
+        }
+
+        var window = add_new_window ();
+        window.connect_to (machine);
+    }
+
     public void delete_machine (Machine machine, bool by_user = true) {
         machine.delete (by_user);         // Will also delete associated storage volume if by_user is 'true'
         collection.remove_item (machine);
diff --git a/src/selectionbar.vala b/src/selectionbar.vala
index e979067..0187ab9 100644
--- a/src/selectionbar.vala
+++ b/src/selectionbar.vala
@@ -11,6 +11,8 @@ private class Boxes.Selectionbar: Gtk.Revealer {
     private Gtk.Button remove_btn;
     [GtkChild]
     private Gtk.Button properties_btn;
+    [GtkChild]
+    private Gtk.Button open_btn;
 
     private AppWindow window;
 
@@ -20,6 +22,7 @@ private class Boxes.Selectionbar: Gtk.Revealer {
             update_properties_btn ();
             update_pause_btn ();
             update_delete_btn ();
+            update_open_btn ();
         });
     }
 
@@ -67,6 +70,11 @@ private class Boxes.Selectionbar: Gtk.Revealer {
     }
 
     [GtkCallback]
+    private void on_open_btn_clicked () {
+        App.app.open_selected_items_in_new_window ();
+    }
+
+    [GtkCallback]
     private void on_remove_btn_clicked () {
         App.app.remove_selected_items ();
     }
@@ -148,4 +156,15 @@ private class Boxes.Selectionbar: Gtk.Revealer {
 
         remove_btn.sensitive = sensitive;
     }
+
+    private void update_open_btn () {
+        var items = App.app.selected_items.length ();
+
+        open_btn.sensitive = items > 0;
+        // Translators: This is a button to open box(es) in new window(s)
+        if (items == 0)
+            open_btn.label = _("_Open in new window");
+        else
+            open_btn.label = ngettext ("_Open in new window", "_Open in %d new windows", items).printf 
(items);
+    }
 }