JavaFx TreeView with CheckBox and ContextMenu - checkbox

Question

in the tutorial http://docs.oracle.com/javafx/2/ui_controls/tree-view.htm it explain how to create a TreeView with ContextMenu or CheckBox.
but is it possible to have both of them?
when I first copy-paste the code, I learned that I can have only one setCellFactory since they overwrite each other.
// the following two setCellFactory are copied from the tutorial
// this create TreeCell with ContextMenu
treeView.setCellFactory(new Callback<TreeView<String>,TreeCell<String>>(){
#Override
public TreeCell<String> call(TreeView<String> p) {
return new TextFieldTreeCellImpl();
//the class TextFieldTreeCellImp is a TreeCell with ContextMenu
}
});
// this create TreeCell with CheckBox
tree.setCellFactory(CheckBoxTreeCell.<String>forTreeView());
then i tried substituting TreeCell with CheckBoxTreeCell
//class TextFieldTreeCellImpl extends TreeCell<String> {
class TextFieldTreeCellImpl extends CheckBoxTreeCell<String> {
...
//TreeItem newTag = new TreeItem<String>("New tag");
CheckBoxTreeItem newTag = new CheckBoxTreeItem<String>("New tag");
but the checkbox didn't appear. it's still a normal treeview.

Answer 1

I think the fastest way to get a TreeView with CheckBoxes and a ContextMenu is adding the ContextMenu within the factory callback:
treeView.setCellFactory(new Callback<TreeView<String>,TreeCell<String>>() {
#Override
public TreeCell<String> call(TreeView<String> param) {
TreeCell<String> cell = CheckBoxTreeCell.<String>forTreeView().call(param);
ContextMenu menu = new ContextMenu();
MenuItem item1 = new MenuItem("Item 1");
MenuItem item2 = new MenuItem("Item 2");
EventHandler<ActionEvent> eh = new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
System.out.println("Item '" + event.getSource() +
"' of cell '" + cell + "' was clicked.");
}
};
item1.setOnAction(eh);
item2.setOnAction(eh);
menu.getItems().add(item1);
menu.getItems().add(item2);
cell.setContextMenu(menu);
return cell;
}
});
I call the usual TreeCell factory for the CheckBoxes. However, before returning the cell I add the ContextMenu.
Using the EventHandler, you can specify the clicking behaviour of the respective item.
If you have further questions or this is not a satisfying solution of you problem, feel free to contact me.