java - SWT Horizontal line after Text fully expanded -

i'm trying display history in textfield in swt.

the history generates new shell has 2 composites. first displays header part contains label "history" , horizontal line underneath. second footer part display actual data. works, horizontal line not expanded (i.e.: "filled") throughout available horizontal space (i.e.: until composite "end").

               public void mousedown(final mouseevent e) {             findsegmenttext.settext("");             if(0 == lastsegmentids.size()) return;             if(disabletooltipsbutton.getselection()) return; // context not desired              if(null != popupshell) popupshell.dispose();              popupshell = new shell(display.getdefault(), swt.border | swt.on_top | swt.modeless);             //popupshell.setlayoutdata(new griddata(griddata.fill_horizontal));             popupshell.setlayout(createnomarginlayout(1, false));              /* header */             compositesearchsegments1 = new composite(popupshell, swt.none);             compositesearchsegments1.setlayoutdata(new griddata(griddata.fill_horizontal));             compositesearchsegments1.setlayout(createnomarginlayout(1, false));               /* footer */             compositesearchsegments2 = new composite(popupshell, swt.none);             compositesearchsegments2.setlayoutdata(new griddata(griddata.fill, griddata.fill, true, true));             compositesearchsegments2.setlayout(createnomarginlayout(2, false));                label history  = new label(compositesearchsegments1, swt.none);               history.settext("history");                label line1  = new label(compositesearchsegments1,  swt.separator | swt.shadow_out | swt.horizontal);              for(int = lastsegmentids.size()-1 ; i>=0;i--) { // iterate backwards, higher indexes have newer selected links                  final string lastsegmentid  = lastsegmentids.get(i);                   l.settext(lastsegmentid);                 button b = new button(compositesearchsegments2, swt.none);                   b.setvisible(true);                 b.settext(">>");                 b.setsize(10,10);                   b.addselectionlistener(new selectionadapter() {                     @override                     public void widgetselected(selectionevent e) {                         findsegmenttext.settext(lastsegmentid);                         searchanddisplaylink(long.decode(findsegmenttext.gettext()));                     }                 });             }                     point point = optionscomposite.todisplay(e.x + optionscomposite.getbounds().x +findsegmenttext.getlocation().x, e.y + optionscomposite.getbounds().y+findsegmenttext.getlocation().y );             popupshell.setlocation(point.x-125, point.y-10);             popupshell.pack();             popupshell.open();             findsegmenttext.setfocus();          } 

which produces result:

i expand line fill available horizontal space. should do? thank you.

since using gridlayout, adding griddata separator label trick:

public static void main(string[] args) {     display display = new display();     shell shell = new shell(display);     shell.settext("stackoverflow");     shell.setlayout(new gridlayout(1, false));      label first = new label(shell, swt.none);     first.settext("short");      label separator = new label(shell, swt.separator | swt.shadow_out | swt.horizontal);     separator.setlayoutdata(new griddata(swt.fill, swt.center, true, false));      label second = new label(shell, swt.none);     second.settext("looooooooooooooooooooooooooooooooooooong");      shell.pack();     shell.open();      while (!shell.isdisposed())     {         if (!display.readanddispatch())             display.sleep();     }     display.dispose(); } 

looks this: