Make playhead centering optional and disable it while recording.

Timeline/TLE.fl

@@ -250,9 +250,14 @@ exit( 0 );}
         } {
           MenuItem {} {
             label {&Follow Playhead}
-            callback {Timeline::follow_playhead = menu_picked_value( o );} selected
+            callback {Timeline::follow_playhead = menu_picked_value( o );}
             xywh {20 20 40 25} type Toggle value 1
           }
+          MenuItem {} {
+            label {&Center Playhead}
+            callback {Timeline::center_playhead = menu_picked_value( o );} selected
+            xywh {30 30 40 25} type Toggle value 1
+          }
           Submenu {} {
             label {&Snap to} open
             xywh {0 0 74 25}

Timeline/Timeline.C

@@ -35,6 +35,7 @@ bool Timeline::draw_with_measure_lines = true;
 Timeline::snap_e Timeline::snap_to = Bars;
 bool Timeline::snap_magnetic = true;
 bool Timeline::follow_playhead = true;
+bool Timeline::center_playhead = true;
 
 const float UPDATE_FREQ = 0.02f;
 
@@ -744,7 +745,12 @@ Timeline::redraw_playhead ( void )
         last_playhead = transport->frame;
 
         if ( follow_playhead )
-            xposition( max( 0, ts_to_x( transport->frame ) - ( ( tracks->w() - Track::width() ) >> 1 ) ) );
+        {
+            if ( center_playhead && active() )
+                xposition( max( 0, ts_to_x( transport->frame ) - ( ( tracks->w() - Track::width() ) >> 1 ) ) );
+            else if ( ts_to_x( transport->frame ) > ts_to_x( xoffset ) + ( tracks->w() - Track::width() ) )
+                xposition( ts_to_x( transport->frame ) );
+        }
     }
 }
 

Timeline/Timeline.H

@@ -118,6 +118,7 @@ public:
     static snap_e snap_to;
     static bool snap_magnetic;
     static bool follow_playhead;
+    static bool center_playhead;
 
     Tempo_Sequence *tempo_track;
     Time_Sequence  *time_track;

Timeline/Transport.H

@@ -136,6 +136,7 @@ public:
         }
 
     bool rolling;
+    bool recording;
 
     void poll ( void );
     void locate ( nframes_t frame );