[libchamplain] On double click, center to the clicked area

[Jiří Techet <jiritechet src gnome org>]

commit 90a031aa03b3bfcd1f9b6b96fe10272d70c76314
Author: JiÅ?í Techet <techet gmail com>
Date:   Fri Aug 20 02:20:10 2010 +0200

    On double click, center to the clicked area
    
    Makes us behave the same way as google maps.
    
    Signed-off-by: JiÅ?í Techet <techet gmail com>

 champlain/champlain-view.c |   22 ++++++++++++++++++++--
 1 files changed, 20 insertions(+), 2 deletions(-)
---
diff --git a/champlain/champlain-view.c b/champlain/champlain-view.c
index b449c47..b88fb4b 100644
--- a/champlain/champlain-view.c
+++ b/champlain/champlain-view.c
@@ -1739,9 +1739,27 @@ finger_scroll_button_press_cb (G_GNUC_UNUSED ClutterActor *actor,
   DEBUG_LOG ()
 
   ChamplainViewPrivate *priv = view->priv;
+  guint zoom_level = priv->zoom_level + 1;
 
-  if (priv->zoom_on_double_click && event->button == 1 && event->click_count == 2)
-    return view_set_zoom_level_at (view, priv->zoom_level + 1, event->x, event->y);
+  if (!ZOOM_LEVEL_OUT_OF_RANGE (priv, zoom_level) && priv->zoom_on_double_click &&
+      event->button == 1 && event->click_count == 2)
+    {
+      gdouble lon, lat;
+      
+      champlain_view_get_coords_from_event (view, (ClutterEvent *) event, &lat, &lon);
+
+      champlain_view_stop_go_to (view);
+
+      priv->zoom_level = zoom_level;
+
+      resize_viewport (view);
+      
+      champlain_view_center_on (view, lat, lon);
+
+      g_object_notify (G_OBJECT (view), "zoom-level");
+
+      return TRUE;
+    }
 
   return FALSE; /* Propagate the event */
 }