working with signals

[evince.git] / libview / ev-view-presentation.c

diff --git a/libview/ev-view-presentation.c b/libview/ev-view-presentation.c
index 3454d778fc4a51d163f3d0476a37a08f2dff081e..6ee168beff4fd6679e24ccf7e65e5eb00fea8926 100644 (file)
--- a/libview/ev-view-presentation.c
+++ b/libview/ev-view-presentation.c
@@ -40,6 +40,7 @@ enum {
 };
 
 enum {
+       PAGE_CHANGED,
        CHANGE_PAGE,
        FINISHED,
         SIGNAL_EXTERNAL_LINK,
@@ -57,6 +58,8 @@ struct _EvViewPresentation
 {
        GtkWidget base;
 
+        guint                  is_constructing : 1;
+
        guint                  current_page;
        cairo_surface_t       *current_surface;
        EvDocument            *document;
@@ -95,6 +98,8 @@ struct _EvViewPresentationClass
        GtkWidgetClass base_class;
 
        /* signals */
+       void (* page_changed)  (EvViewPresentation *pview,
+                               gint                page);
        void (* change_page)   (EvViewPresentation *pview,
                                 GtkScrollType       scroll);
        void (* finished)      (EvViewPresentation *pview);
@@ -379,6 +384,25 @@ ev_view_presentation_delete_job (EvViewPresentation *pview,
        g_object_unref (job);
 }
 
+static void
+ev_view_presentation_reset_jobs (EvViewPresentation *pview)
+{
+        if (pview->curr_job) {
+                ev_view_presentation_delete_job (pview, pview->curr_job);
+                pview->curr_job = NULL;
+        }
+
+        if (pview->prev_job) {
+                ev_view_presentation_delete_job (pview, pview->prev_job);
+                pview->prev_job = NULL;
+        }
+
+        if (pview->next_job) {
+                ev_view_presentation_delete_job (pview, pview->next_job);
+                pview->next_job = NULL;
+        }
+}
+
 static void
 ev_view_presentation_update_current_page (EvViewPresentation *pview,
                                          guint               page)
@@ -467,6 +491,8 @@ ev_view_presentation_update_current_page (EvViewPresentation *pview,
                }
        }
 
+       g_signal_emit (pview, signals[PAGE_CHANGED], 0, page);
+       g_printf("pages: %d %d\n",page,pview->current_page;
        pview->current_page = page;
 
        if (pview->page_cache)
@@ -483,6 +509,19 @@ ev_view_presentation_update_current_page (EvViewPresentation *pview,
                gtk_widget_queue_draw (GTK_WIDGET (pview));
 }
 
+void
+ev_view_presentation_set_page (EvViewPresentation *pview, gint new_page)
+{
+       guint n_pages;
+
+       n_pages = ev_document_get_n_pages (pview->document);
+
+       if (new_page >= n_pages)
+               ev_view_presentation_set_end (pview);
+       else
+               ev_view_presentation_update_current_page (pview, new_page);
+}
+
 void
 ev_view_presentation_next_page (EvViewPresentation *pview)
 {
@@ -628,9 +667,9 @@ ev_view_presentation_goto_window_create (EvViewPresentation *pview)
        GtkWindow *toplevel, *goto_window;
 
        toplevel = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (pview)));
-       goto_window = GTK_WINDOW (pview->goto_window);
 
        if (pview->goto_window) {
+                goto_window = GTK_WINDOW (pview->goto_window);
                if (gtk_window_has_group (toplevel))
                        gtk_window_group_add_window (gtk_window_get_group (toplevel), goto_window);
                else if (gtk_window_has_group (goto_window))
@@ -640,6 +679,7 @@ ev_view_presentation_goto_window_create (EvViewPresentation *pview)
        }
 
        pview->goto_window = gtk_window_new (GTK_WINDOW_POPUP);
+        goto_window = GTK_WINDOW (pview->goto_window);
        gtk_window_set_screen (goto_window, gtk_widget_get_screen (GTK_WIDGET (pview)));
 
        if (gtk_window_has_group (toplevel))
@@ -927,21 +967,7 @@ ev_view_presentation_dispose (GObject *object)
        ev_view_presentation_animation_cancel (pview);
        ev_view_presentation_transition_stop (pview);
        ev_view_presentation_hide_cursor_timeout_stop (pview);
-
-       if (pview->curr_job) {
-               ev_view_presentation_delete_job (pview, pview->curr_job);
-               pview->curr_job = NULL;
-       }
-
-       if (pview->prev_job) {
-               ev_view_presentation_delete_job (pview, pview->prev_job);
-               pview->prev_job = NULL;
-       }
-
-       if (pview->next_job) {
-               ev_view_presentation_delete_job (pview, pview->next_job);
-               pview->next_job = NULL;
-       }
+        ev_view_presentation_reset_jobs (pview);
 
        if (pview->current_surface) {
                cairo_surface_destroy (pview->current_surface);
@@ -1345,7 +1371,7 @@ ev_view_presentation_set_property (GObject      *object,
                pview->current_page = g_value_get_uint (value);
                break;
        case PROP_ROTATION:
-               pview->rotation = g_value_get_uint (value);
+                ev_view_presentation_set_rotation (pview, g_value_get_uint (value));
                break;
        case PROP_INVERTED_COLORS:
                pview->inverted_colors = g_value_get_boolean (value);
@@ -1355,10 +1381,27 @@ ev_view_presentation_set_property (GObject      *object,
        }
 }
 
+static void
+ev_view_presentation_get_property (GObject    *object,
+                                   guint       prop_id,
+                                   GValue     *value,
+                                   GParamSpec *pspec)
+{
+        EvViewPresentation *pview = EV_VIEW_PRESENTATION (object);
+
+        switch (prop_id) {
+        case PROP_ROTATION:
+                g_value_set_uint (value, ev_view_presentation_get_rotation (pview));
+                break;
+        default:
+                G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+        }
+}
+
 static GObject *
 ev_view_presentation_constructor (GType                  type,
-                                 guint                  n_construct_properties,
-                                 GObjectConstructParam *construct_params)
+                                                                 guint                  n_construct_properties,
+                                                                 GObjectConstructParam *construct_params)
 {
        GObject            *object;
        EvViewPresentation *pview;
@@ -1367,6 +1410,7 @@ ev_view_presentation_constructor (GType                  type,
                                                                                  n_construct_properties,
                                                                                  construct_params);
        pview = EV_VIEW_PRESENTATION (object);
+        pview->is_constructing = FALSE;
 
        if (EV_IS_DOCUMENT_LINKS (pview->document)) {
                pview->page_cache = ev_page_cache_new (pview->document);
@@ -1400,6 +1444,7 @@ ev_view_presentation_class_init (EvViewPresentationClass *klass)
 
        gobject_class->constructor = ev_view_presentation_constructor;
        gobject_class->set_property = ev_view_presentation_set_property;
+        gobject_class->get_property = ev_view_presentation_get_property;
 
        g_object_class_install_property (gobject_class,
                                         PROP_DOCUMENT,
@@ -1423,8 +1468,8 @@ ev_view_presentation_class_init (EvViewPresentationClass *klass)
                                                            "Rotation",
                                                            "Current rotation angle",
                                                            0, 360, 0,
-                                                           G_PARAM_WRITABLE |
-                                                           G_PARAM_CONSTRUCT_ONLY));
+                                                           G_PARAM_READWRITE |
+                                                           G_PARAM_CONSTRUCT));
        g_object_class_install_property (gobject_class,
                                         PROP_INVERTED_COLORS,
                                         g_param_spec_boolean ("inverted_colors",
@@ -1443,6 +1488,15 @@ ev_view_presentation_class_init (EvViewPresentationClass *klass)
                              g_cclosure_marshal_VOID__ENUM,
                              G_TYPE_NONE, 1,
                              GTK_TYPE_SCROLL_TYPE);
+       signals [PAGE_CHANGED] =
+               g_signal_new ("page-changed",
+                             EV_TYPE_VIEW_PRESENTATION,
+                             G_SIGNAL_RUN_LAST,
+                             G_STRUCT_OFFSET (EvViewPresentationClass, page_changed),
+                             NULL, NULL,
+                             g_cclosure_marshal_VOID__INT,
+                             G_TYPE_NONE, 2,
+                             G_TYPE_INT, G_TYPE_INT);
        signals[FINISHED] =
                g_signal_new ("finished",
                              G_OBJECT_CLASS_TYPE (gobject_class),
@@ -1507,6 +1561,7 @@ static void
 ev_view_presentation_init (EvViewPresentation *pview)
 {
        gtk_widget_set_can_focus (GTK_WIDGET (pview), TRUE);
+        pview->is_constructing = TRUE;
 }
 
 GtkWidget *
@@ -1531,3 +1586,31 @@ ev_view_presentation_get_current_page (EvViewPresentation *pview)
 {
        return pview->current_page;
 }
+
+void
+ev_view_presentation_set_rotation (EvViewPresentation *pview,
+                                   gint                rotation)
+{
+        if (rotation >= 360)
+                rotation -= 360;
+        else if (rotation < 0)
+                rotation += 360;
+
+        if (pview->rotation == rotation)
+                return;
+
+        pview->rotation = rotation;
+        g_object_notify (G_OBJECT (pview), "rotation");
+        if (pview->is_constructing)
+                return;
+
+        pview->scale = 0;
+        ev_view_presentation_reset_jobs (pview);
+        ev_view_presentation_update_current_page (pview, pview->current_page);
+}
+
+guint
+ev_view_presentation_get_rotation (EvViewPresentation *pview)
+{
+        return pview->rotation;
+}