[fltk.general] can't get no FL_DRAG event

[testalucida]

Hi all,

can someone explain, what's wrong with this code? There's no FL_DRAG event 
upcoming in the Box class:

#include <FL/Fl.H>
#include <FL/Fl_Double_Window.H>
#include <FL/Fl_Group.H>
#include <FL/Fl_Box.H>
#include <stdio.h>

class Box : public Fl_Box {
public:
        Box( int x, int y, int w, int h )
                : Fl_Box( x, y, w, h )
        {
                box( FL_UP_BOX );
                color( fl_lighter( FL_YELLOW ) );
        }
protected:
        int handle( int evt ) {
                int rc = Fl_Box::handle( evt );

                if( evt == FL_DRAG ) {
                        printf( "dragging\n", evt );
                        return 1;
                }

                return rc;
        }
};

int main() {
        Fl_Double_Window *pWin = new Fl_Double_Window( 500, 500, "Dragging" );
        Fl_Group *pGrp = new Fl_Group( 0, 0, 500, 500 );
        pGrp->box( FL_FLAT_BOX );
        pGrp->color( fl_lighter( FL_GRAY ) );
        pGrp->begin();
        Box *pBox = new Box( 50, 50, 200, 25 );
        pGrp->end();
        pWin->end();
        pWin->resizable( pWin );
        pWin->show();

        return Fl::run();
}

Thanks & bye
testalucida
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