[gnome-photos] spinner-box: Show it only when revealed (and running)

[Debarshi Ray <debarshir src gnome org>]

commit 73e324730efcf047119ed530e1d0a7dc6a0102b7
Author: Debarshi Ray <debarshir gnome org>
Date:   Sat Jun 27 10:49:58 2015 +0200

    spinner-box: Show it only when revealed (and running)
    
    We need to hide the GtkRevealer when the child is not revealed to
    ensure that the GdkWindow also goes away. Otherwise, it stays overlaid
    and interferes with the crop tool. For example, the crop tool changes
    the GdkCursor depending on where the mouse is relative to the crop
    area. If the SpinnerBox's GdkWindow is in the overlay then the mouse
    pointer changes while passing over the invisible spinner.

 src/photos-spinner-box.c |   15 +++++++++++++--
 1 files changed, 13 insertions(+), 2 deletions(-)
---
diff --git a/src/photos-spinner-box.c b/src/photos-spinner-box.c
index e70ebb7..aec988a 100644
--- a/src/photos-spinner-box.c
+++ b/src/photos-spinner-box.c
@@ -47,6 +47,16 @@ G_DEFINE_TYPE (PhotosSpinnerBox, photos_spinner_box, GTK_TYPE_REVEALER);
 
 
 static void
+photos_spinner_box_notify_child_revealed (GtkRevealer *revealer)
+{
+  if (!gtk_revealer_get_child_revealed (revealer))
+    gtk_widget_hide (GTK_WIDGET (revealer));
+
+  g_signal_handlers_disconnect_by_func (revealer, photos_spinner_box_notify_child_revealed, NULL);
+}
+
+
+static void
 photos_spinner_box_constructed (GObject *object)
 {
   PhotosSpinnerBox *self = PHOTOS_SPINNER_BOX (object);
@@ -58,8 +68,6 @@ photos_spinner_box_constructed (GObject *object)
   gtk_widget_set_halign (self->spinner, GTK_ALIGN_CENTER);
   gtk_widget_set_valign (self->spinner, GTK_ALIGN_CENTER);
   gtk_container_add (GTK_CONTAINER (self), self->spinner);
-
-  gtk_widget_show_all (GTK_WIDGET (self));
 }
 
 
@@ -92,6 +100,7 @@ photos_spinner_box_new (void)
 void
 photos_spinner_box_start (PhotosSpinnerBox *self)
 {
+  gtk_widget_show_all (GTK_WIDGET (self));
   gtk_revealer_set_reveal_child (GTK_REVEALER (self), TRUE);
   gtk_spinner_start (GTK_SPINNER (self->spinner));
 }
@@ -101,5 +110,7 @@ void
 photos_spinner_box_stop (PhotosSpinnerBox *self)
 {
   gtk_revealer_set_reveal_child (GTK_REVEALER (self), FALSE);
+  g_signal_connect (self, "notify::child-revealed", G_CALLBACK (photos_spinner_box_notify_child_revealed), 
NULL);
+
   gtk_spinner_stop (GTK_SPINNER (self->spinner));
 }