Allow timeline widget to take keyboard focus and pass keyboard events on to children.

Timeline/Timeline.C

@@ -589,6 +589,8 @@ Timeline::handle ( int m )
 
                     return 1;
                 }
+                default:
+                    return Fl_Overlay_Window::handle( m );
             }
 
             return 0;
@@ -607,6 +609,8 @@ Timeline::handle ( int m )
             {
                 case FL_PUSH:
                 {
+                    take_focus();
+
                     if ( ! Fl::event_button1() )
                         return 0;
 

Timeline/Track.C

@@ -340,6 +340,10 @@ Track::handle ( int m )
 
     switch ( m )
     {
+        case FL_FOCUS:
+            return 1;
+        case FL_UNFOCUS:
+            return 1;
         case FL_DND_ENTER:
             printf( "enter\n" );
             if ( Track_Widget::pushed() && Track_Widget::pushed()->track()->class_name() == class_name() )
@@ -374,7 +378,11 @@ Track::handle ( int m )
                 int retval = r->dispatch( m );
 
                 if ( retval && m == FL_PUSH )
+                {
+                    take_focus();
+
                     Track_Widget::pushed( r );
+                }
 
                 if ( retval && m == FL_RELEASE )
                     Track_Widget::pushed( NULL );