[gtk+/popovers: 29/33] popover: Implement keyboard focus behavior

[Carlos Garnacho <carlosg src gnome org>]

commit fa6b58d4aa6ee92ffd414482092634996bcd14d5
Author: Carlos Garnacho <carlosg gnome org>
Date:   Thu Jan 9 12:53:29 2014 +0100

    popover: Implement keyboard focus behavior
    
    When a popover is focused, the focus is forwarded so the first
    child what would get the focus actually gets it. Also, implement
    correct focus chain, so the keyboard focus stays within the popover
    when navigating with keyboard.

 gtk/gtkpopover.c |   42 ++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 42 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkpopover.c b/gtk/gtkpopover.c
index e68e983..55a2274 100644
--- a/gtk/gtkpopover.c
+++ b/gtk/gtkpopover.c
@@ -773,6 +773,46 @@ gtk_popover_key_press (GtkWidget   *widget,
 }
 
 static void
+gtk_popover_grab_focus (GtkWidget *widget)
+{
+  /* Focus the first natural child */
+  gtk_widget_child_focus (gtk_bin_get_child (GTK_BIN (widget)),
+                          GTK_DIR_TAB_FORWARD);
+}
+
+static gboolean
+gtk_popover_focus (GtkWidget        *widget,
+                   GtkDirectionType  direction)
+{
+  GtkPopoverPrivate *priv;
+
+  priv = gtk_popover_get_instance_private (GTK_POPOVER (widget));
+
+  if (!GTK_WIDGET_CLASS (gtk_popover_parent_class)->focus (widget, direction))
+    {
+      GtkWidget *focus;
+
+      focus = gtk_window_get_focus (priv->window);
+      focus = gtk_widget_get_parent (focus);
+
+      /* Unset focus child through children, so it is next stepped from
+       * scratch.
+       */
+      while (focus && focus != widget)
+        {
+          gtk_container_set_focus_child (GTK_CONTAINER (focus), NULL);
+          focus = gtk_widget_get_parent (focus);
+        }
+
+      return gtk_widget_child_focus (gtk_bin_get_child (GTK_BIN (widget)),
+                                     direction);
+    }
+
+  return TRUE;
+}
+
+
+static void
 gtk_popover_class_init (GtkPopoverClass *klass)
 {
   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
@@ -792,6 +832,8 @@ gtk_popover_class_init (GtkPopoverClass *klass)
   widget_class->draw = gtk_popover_draw;
   widget_class->button_press_event = gtk_popover_button_press;
   widget_class->key_press_event = gtk_popover_key_press;
+  widget_class->grab_focus = gtk_popover_grab_focus;
+  widget_class->focus = gtk_popover_focus;
 
   /**
    * GtkPopover:relative-to: