java - JavaFx CheckTreeView how to check which item is unchecked? -


i using controlsfx checktreeview. have lots of elements in checktreeview , dont want traverse through elements in tree ( because takes lots of time due number of elements in tree). there method checktreeview.getlastuncheckeditem(); last unchecked one.

currently checking number of elements checked , comparing counter.

    if (countprev > count){ //something unchecked stuff }

but again, cant find unchecked without traverse through elements.

edit:

when user checks item on checktreeview, item 

string lastcheckeditem = checktreeview.getcheckmodel(). getcheckeditems().get(treeview.getcheckmodel().getcheckeditems().size()-1).tostring();

now need unchecked item

stack<yourclassofthecheckmodel> recentlyunchcked = new stack<yourclassofthecheckmodel>(); yourtreeview.getselectionmodel(). selecteditemproperty().addlistener( new changelistener() {          @override         public void changed(observablevalue observable, object oldvalue,                 object newvalue) {              treeitem<yourclassofthecheckmodel> selecteditem =                 (treeitem<yourclassofthecheckmodel>) newvalue;            checkmodel checkmodel = checktreeview.getcheckmodel().            bool checked = checkmodel.ischecked (selecteditem);            if(checked==false){                 recentlyunchcked.push(yourobjectofthecheckmodel);            }         }        });

hope or give idea though don't know if work (code not tested, have no ide right now).


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