Add Track_Point class for track widgets with no meaningful length.

Region.H

@@ -75,6 +75,10 @@ public:
     virtual int w ( void ) const { return timeline.ts_to_x( _end - _start ); }
 //    int w ( void ) const { return timeline.ts_to_x( (_end - _start) - ( timeline.xoffset - _offset) ); }
 
+    int abs_x ( void ) const { return timeline.ts_to_x( timeline.xoffset ); }
+    int abs_w ( void ) const { return timeline.ts_to_x( _end - _start ); }
+
+
     Fl_Color color ( void ) { return _color; }
     Fl_Color box_color ( void ) { return _box_color; }
 
@@ -218,26 +222,23 @@ public:
 };
 
 
-    class Tempo_Point : public Track_Widget
-    {
-        float _tempo;
+class Track_Point : public Track_Widget
+{
 
-    public:
+protected:
 
-/*         Tempo_Point ( ) */
-/*             { */
-/*                 _tempo = 120; */
-/*             } */
+    char *_label;
 
-        Tempo_Point ( nframes_t when, float bpm )
-            {
-                _tempo = bpm;
-                _offset = when;
-            }
+public:
 
     int w ( void ) const { return 10; }
     nframes_t length ( void ) const { return timeline.x_to_ts( w() ); }
 
+    Track_Point ( )
+        {
+            _label = NULL;
+        }
+
     void
     draw ( int X, int Y, int W, int H )
         {
@@ -246,16 +247,36 @@ public:
 
             Track_Widget::draw( x(), Y, w(), H );
 
+            draw_label( _label, FL_ALIGN_RIGHT );
+        }
+};
 
-                char pat[40];
+class Tempo_Point : public Track_Point
+{
+    float _tempo;
 
-                snprintf( pat, 40, "%.1f", _tempo );
+    void
+    _make_label ( void )
+        {
+            if ( ! _label )
+                _label = new char[40];
 
-                draw_label( pat, FL_ALIGN_RIGHT );
+            snprintf( _label, 40, "%.1f", _tempo );
+        }
+public:
 
+    Tempo_Point ( nframes_t when, float bpm )
+        {
+            _tempo = bpm;
+            _offset = when;
+
+            _make_label();
         }
 
-    };
+    ~Tempo_Point ( )
+        { if ( _label ) delete[] _label; }
+
+};
 
     class Region : public Track_Widget
     {

main.C

@@ -36,19 +36,11 @@
 #include <stdlib.h>
 #include <string.h>
 
-Fl_Color velocity_colors[128];
-
 #include "Track.H"
 #include "Timeline.H"
 
 #include "const.h"
 
-void
-init_colors ( void )
-{
-    for ( int i = 128; i--; )
-        velocity_colors[i] = fl_rgb_color( 23, 255 - i * 2, 32 );
-}
 
 Timeline timeline;
 
@@ -106,8 +98,6 @@ int
 main ( int argc, char **argv )
 {
 
-    init_colors();
-
     Fl_Double_Window *main_window = new Fl_Double_Window( 0, 0, 800, 600 );
 
     timeline.scroll = new Fl_Scroll( 0, 24, 800, 600 - (24 * 2) );