Let tracks recieve DND events.

Track.H

@@ -20,10 +20,9 @@
 #pragma once
 
 #include <FL/Fl_Group.H>
-
+#include <FL/Fl.H>
 #include "Region.H"
 
-
 #include <stdio.h>
 
 #include <list>
@@ -80,4 +79,33 @@ public:
             r->position( r->x(), y() );
             r->redraw();
         }
+
+    int handle ( int m )
+        {
+            switch ( m )
+            {
+		case FL_DND_DRAG:
+		case FL_DND_RELEASE:
+		case FL_DND_ENTER:
+		case FL_DND_LEAVE:
+		case FL_ENTER:
+                    return 1;
+                case FL_PASTE:
+                {
+                    const char *file, *text = Fl::event_text();
+
+                    if ( ! strncmp( text, "file://", 7 ) )
+                        file = text + 7;
+                    else
+                        // error?
+                        file = text;
+
+                    printf( "pasted file \"%s\"\n", file );
+
+                    return 1;
+                }
+                default:
+                    return Fl_Group::handle( m );
+            }
+        }
 };