java - Conflict of "addSelectionChangedListener" and "addDoubleClickListener" for TableViewer -

all related

with jface tableviewer, want select entry(e.g select file) single-click, , other operations(e.g go directory) double-click.

noticing addselectionchangedlistener() , adddoubleclicklistener() via webpage: http://javafact.com/2010/08/07/example-tableviewer-events/ , add selectionchangedlistener , doubleclicklistener tableviwer, , find out: either of 2 listeners can work, can't work - it's doubleclicklistener can't work.

what's problem? how should implement listeners single-click , double-clicks? comments appreciated.

about code: created tableviewer, , want show filesystem structure. expected behavior: user can double click directory entry , tableviewer show structure of selected directory; user select generic file single-click. other operations, warning message dialog shown.

the following code related event handlers.

tableview.addselectionchangedlistener( new iselectionchangedlistener() { public void selectionchanged(selectionchangedevent event) {       istructuredselection sel = (istructuredselection) tableview.getselection();         file selfile = (file) sel.getfirstelement();       if(selfile != null){     if (selfile.isdirectory()) {        messagedialog.openwarning(getshell(), "warning", "you select directory");                return;             }     system.out.println("selected : "+ selfile.getabsolutepath());     selectfilename = selfile.getabsolutepath();    }     }  });   tableview.adddoubleclicklistener( new idoubleclicklistener() {  @override public void doubleclick(doubleclickevent arg0) {    object selected;    istructuredselection selection = (istructuredselection) tableview.getselection();    if (selection.size() != 1) return;    selected = selection.getfirstelement();    file file = (file) selected;    if (file.isfile()) {      messagedialog.openinformation(getshell(),"warning", "you double-clicks generic file");      return;    }    if (file.isdirectory()) {     system.out.println("clicked direcotry: " + file.getabsolutepath());      //applynewdirectory(file);   }      }              });  

regards & sunzen

(prolog: still working jface/swt here, might of interest someone)

the problem api allows this, not work (oh swt...). cannot have both listeners on tableview, selectionchangedlistener grab click , consume event.

the solution attach selectionchangedlistener underlying table, , doubleclicklistener tableviewer. way can have both, e.g.:

table.addselectionchangedlistener(new iselectionchangedlistener(...)); tableviewer.adddoubleclicklistener(new idoubleclicklistener(...));