1 files changed, 92 insertions, 0 deletions
diff --git a/src/list-stack.vala b/src/list-stack.vala
new file mode 100644
index 0000000..cd9745d
--- /dev/null
+++ b/src/list-stack.vala
@@ -0,0 +1,92 @@
+/* -*- Mode: Vala; indent-tabs-mode: nil; tab-width: 4 -*-
+ *
+ * Copyright (C) 2011,2012 Canonical Ltd
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 3 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Authored by: Michael Terry <michael.terry@canonical.com>
+ */
+
+public class ListStack : Gtk.Fixed
+{
+    public uint num_children
+    {
+        get
+        {
+            var children = get_children ();
+            return children.length ();
+        }
+    }
+
+    private int width;
+
+    construct
+    {
+        width = grid_size * GreeterList.BOX_WIDTH;
+    }
+
+    public GreeterList? top ()
+    {
+        var children = get_children ();
+        if (children == null)
+            return null;
+        else
+            return children.last ().data as GreeterList;
+    }
+
+    public void push (GreeterList pushed)
+    {
+        return_if_fail (pushed != null);
+
+        var children = get_children ();
+
+        pushed.start_scrolling = false;
+        pushed.set_size_request (width, -1);
+        add (pushed);
+
+        if (children != null)
+        {
+            var current = children.last ().data as GreeterList;
+            /* Clear any errors so when we come back, they will be gone. */
+            current.selected_entry.reset_state ();
+            current.greeter_box.push (pushed);
+        }
+    }
+
+    public void pop ()
+    {
+        var children = get_children ();
+
+        return_if_fail (children != null);
+
+        unowned List<Gtk.Widget> prev = children.last ().prev;
+        if (prev != null)
+            (prev.data as GreeterList).greeter_box.pop ();
+    }
+
+    public override void size_allocate (Gtk.Allocation allocation)
+    {
+        base.size_allocate (allocation);
+        var children = get_children ();
+        foreach (var child in children)
+        {
+            child.size_allocate (allocation);
+        }
+    }
+
+    public override void get_preferred_width (out int min, out int nat)
+    {
+        min = width;
+        nat = width;
+    }
+}