Speed up AFL/PFL changes for large sessions

[ardour.git] / gtk2_ardour / editor_routes.cc

diff --git a/gtk2_ardour/editor_routes.cc b/gtk2_ardour/editor_routes.cc
index e46fcfee5a28b26db43955e12a57f0924d125547..075242459ede71396019b392a49fadb0c4df08f5 100644 (file)
--- a/gtk2_ardour/editor_routes.cc
+++ b/gtk2_ardour/editor_routes.cc
@@ -57,7 +57,7 @@
 #include "vca_time_axis.h"
 #include "utils.h"
 
-#include "i18n.h"
+#include "pbd/i18n.h"
 
 using namespace std;
 using namespace ARDOUR;
@@ -1013,6 +1013,14 @@ EditorRoutes::sync_presentation_info_from_treeview ()
        TreeModel::Children::iterator ri;
        bool change = false;
        PresentationInfo::order_t order = 0;
+       bool master_is_first = false;
+       uint32_t count = 0;
+
+       // special case master if it's got PI order 0 lets keep it there
+       if (_session->master_out() && (_session->master_out()->presentation_info().order() == 0)) {
+               order++;
+               master_is_first = true;
+       }
 
        for (ri = rows.begin(); ri != rows.end(); ++ri) {
 
@@ -1029,17 +1037,37 @@ EditorRoutes::sync_presentation_info_from_treeview ()
 
                stripable->presentation_info().set_hidden (!visible);
 
+               /* special case master if it's got PI order 0 lets keep it there
+                * but still allow master to move if first non-master route has
+                * presentation order 1
+                */
+               if ((count == 0) && master_is_first && (stripable->presentation_info().order()  == 1)) {
+                       master_is_first = false; // someone has moved master
+                       order = 0;
+               }
+
+               if (stripable->is_master() && master_is_first) {
+                       if (count) {
+                               continue;
+                       } else {
+                               count++;
+                               continue;
+                       }
+               }
+
                if (order != stripable->presentation_info().order()) {
-                       stripable->set_presentation_order_explicit (order);
+                       stripable->set_presentation_order (order, false);
                        change = true;
                }
 
                ++order;
+               ++count;
        }
 
        if (change) {
                DEBUG_TRACE (DEBUG::OrderKeys, "... notify PI change from editor GUI\n");
                _session->notify_presentation_info_change ();
+               _session->set_dirty();
        }
 }