[evince] Allow changing the page of a presentation

[William Jon McCann <mccann src gnome org>]

commit 53d6a3f6c2ee80618f8383bdc6757d81397ebb60
Author: William Jon McCann <jmccann redhat com>
Date:   Wed Feb 13 17:53:17 2013 -0500

    Allow changing the page of a presentation
    
    https://bugzilla.gnome.org/show_bug.cgi?id=693749

 libview/ev-view-presentation.c |   29 +++++++++++++++++++++++++----
 1 files changed, 25 insertions(+), 4 deletions(-)
---
diff --git a/libview/ev-view-presentation.c b/libview/ev-view-presentation.c
index 28f8da6..7c227f6 100644
--- a/libview/ev-view-presentation.c
+++ b/libview/ev-view-presentation.c
@@ -488,7 +488,10 @@ ev_view_presentation_update_current_page (EvViewPresentation *pview,
                }
        }
 
-       pview->current_page = page;
+       if (pview->current_page != page) {
+               pview->current_page = page;
+               g_object_notify (G_OBJECT (pview), "current-page");
+       }
 
        if (pview->page_cache)
                ev_page_cache_set_page_range (pview->page_cache, page, page);
@@ -504,6 +507,21 @@ ev_view_presentation_update_current_page (EvViewPresentation *pview,
                gtk_widget_queue_draw (GTK_WIDGET (pview));
 }
 
+static void
+ev_view_presentation_set_current_page (EvViewPresentation *pview,
+                                       guint               page)
+{
+       if (pview->current_page == page)
+               return;
+
+       if (!gtk_widget_get_realized (GTK_WIDGET (pview))) {
+               pview->current_page = page;
+               g_object_notify (G_OBJECT (pview), "current-page");
+       } else {
+               ev_view_presentation_update_current_page (pview, page);
+       }
+}
+
 void
 ev_view_presentation_next_page (EvViewPresentation *pview)
 {
@@ -1346,7 +1364,7 @@ ev_view_presentation_set_property (GObject      *object,
                pview->enable_animations = EV_IS_DOCUMENT_TRANSITION (pview->document);
                break;
        case PROP_CURRENT_PAGE:
-               pview->current_page = g_value_get_uint (value);
+               ev_view_presentation_set_current_page (pview, g_value_get_uint (value));
                break;
        case PROP_ROTATION:
                 ev_view_presentation_set_rotation (pview, g_value_get_uint (value));
@@ -1368,6 +1386,9 @@ ev_view_presentation_get_property (GObject    *object,
         EvViewPresentation *pview = EV_VIEW_PRESENTATION (object);
 
         switch (prop_id) {
+        case PROP_CURRENT_PAGE:
+                g_value_set_uint (value, pview->current_page);
+                break;
         case PROP_ROTATION:
                 g_value_set_uint (value, ev_view_presentation_get_rotation (pview));
                 break;
@@ -1439,8 +1460,8 @@ ev_view_presentation_class_init (EvViewPresentationClass *klass)
                                                            "Current Page",
                                                            "The current page",
                                                            0, G_MAXUINT, 0,
-                                                           G_PARAM_WRITABLE |
-                                                           G_PARAM_CONSTRUCT_ONLY |
+                                                           G_PARAM_READWRITE |
+                                                           G_PARAM_CONSTRUCT |
                                                             G_PARAM_STATIC_STRINGS));
        g_object_class_install_property (gobject_class,
                                         PROP_ROTATION,