Tempo ramps - don't allow cross-dragging the first meter.

diff --git a/libs/ardour/tempo.cc b/libs/ardour/tempo.cc
index e6f43e412aae81fb108f7345684d961437c22188..f0fd17728aab7be5168b7d8a79e35bc5b6b8e810 100644 (file)
--- a/libs/ardour/tempo.cc
+++ b/libs/ardour/tempo.cc
@@ -1998,6 +1998,11 @@ TempoMap::solve_map (Metrics& imaginary, TempoSection* section, const double& pu
 void
 TempoMap::solve_map (Metrics& imaginary, MeterSection* section, const framepos_t& frame)
 {
+       /* disallow moving first meter past any subsequent one, and any movable meter before the first one */
+       const MeterSection* other =  &meter_section_at_locked (frame);
+       if ((!section->movable() && other->movable()) || (!other->movable() && section->movable() && other->frame() >= frame)) {
+               return;
+       }
        MeterSection* prev_m = 0;
 
        if (!section->movable()) {