[gtk+] popover: propagate (insensitive|backdrop) flags from relative-to widget

[Carlos Garnacho <carlosg src gnome org>]

commit 98a67d969732841e185cc116529e1dc74fffbf3b
Author: Carlos Garnacho <carlosg gnome org>
Date:   Fri Feb 7 16:18:48 2014 +0100

    popover: propagate (insensitive|backdrop) flags from relative-to widget
    
    Popovers aren't direct children of the widget they point to, but yet
    they act as children of it, so do the same with state propagation,
    so the flags that propagate across the hierarchy reach popovers too.

 gtk/gtkpopover.c |   36 ++++++++++++++++++++++++++++++++++++
 1 files changed, 36 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkpopover.c b/gtk/gtkpopover.c
index f3505b2..820b9ca 100644
--- a/gtk/gtkpopover.c
+++ b/gtk/gtkpopover.c
@@ -85,6 +85,7 @@ struct _GtkPopoverPrivate
   guint unmap_id;
   guint scrollable_notify_id;
   guint grab_notify_id;
+  guint state_changed_id;
   guint has_pointing_to    : 1;
   guint preferred_position : 2;
   guint final_position     : 2;
@@ -1296,6 +1297,35 @@ _gtk_popover_parent_hierarchy_changed (GtkWidget  *widget,
 }
 
 static void
+_popover_propagate_state (GtkPopover    *popover,
+                          GtkStateFlags  state,
+                          GtkStateFlags  old_state,
+                          GtkStateFlags  flag)
+{
+  if ((state & flag) != (old_state & flag))
+    {
+      if ((state & flag) == flag)
+        gtk_widget_set_state_flags (GTK_WIDGET (popover), flag, FALSE);
+      else
+        gtk_widget_unset_state_flags (GTK_WIDGET (popover), flag);
+    }
+}
+
+static void
+_gtk_popover_parent_state_changed (GtkWidget     *widget,
+                                   GtkStateFlags  old_state,
+                                   GtkPopover    *popover)
+{
+  guint state;
+
+  state = gtk_widget_get_state_flags (widget);
+  _popover_propagate_state (popover, state, old_state,
+                            GTK_STATE_FLAG_INSENSITIVE);
+  _popover_propagate_state (popover, state, old_state,
+                            GTK_STATE_FLAG_BACKDROP);
+}
+
+static void
 _gtk_popover_parent_grab_notify (GtkWidget  *widget,
                                  gboolean    was_shadowed,
                                  GtkPopover *popover)
@@ -1455,6 +1485,8 @@ gtk_popover_update_relative_to (GtkPopover *popover,
         g_signal_handler_disconnect (priv->widget, priv->size_allocate_id);
       if (g_signal_handler_is_connected (priv->widget, priv->unmap_id))
         g_signal_handler_disconnect (priv->widget, priv->unmap_id);
+      if (g_signal_handler_is_connected (priv->widget, priv->state_changed_id))
+        g_signal_handler_disconnect (priv->widget, priv->state_changed_id);
       if (g_signal_handler_is_connected (priv->widget, priv->grab_notify_id))
         g_signal_handler_disconnect (priv->widget, priv->grab_notify_id);
 
@@ -1488,6 +1520,10 @@ gtk_popover_update_relative_to (GtkPopover *popover,
         g_signal_connect (priv->widget, "unmap",
                           G_CALLBACK (_gtk_popover_parent_unmap),
                           popover);
+      priv->state_changed_id =
+        g_signal_connect (priv->widget, "state-flags-changed",
+                          G_CALLBACK (_gtk_popover_parent_state_changed),
+                          popover);
       priv->grab_notify_id =
         g_signal_connect (priv->widget, "grab-notify",
                           G_CALLBACK (_gtk_popover_parent_grab_notify),