Javafx : ComboBoxTableCell - how to select a value in one click? - javafx

Question

I have a TableView with a ComboBoxTableCell, when using the default implementation the user have to click three times to select a value from of the ComboBox's list.
I want when the user clicks on the cell to show the combo box list. I based my solution on this one:
JavaFX editable ComboBox in a table view
The cell does get into edit mode (startEdit() is called) but it takes another click to show the list of values, what am I missing?
table.addEventHandler(MouseEvent.MOUSE_CLICKED, (e) ->
{
if (table.getEditingCell() == null)
{
TablePosition focusedCellPos = table.getFocusModel().getFocusedCell();
table.edit(focusedCellPos.getRow(), focusedCellPos.getTableColumn());
}
});
Thanks.

Answer 1

Interesting problem - bubbling up again after quite a while :)
Looks like the approach of the OP is indeed working (as of fx11, some bugs around its editing seem to be fixed) - with a little help from the combo cell:
start editing in a single click handler on the tableView (from OP)
extend ComboBoxTableCell and override its startEdit to open the dropDown
Code snippet:
// set editable to see the combo
table.setEditable(true);
// keep approach by OP
table.addEventHandler(MouseEvent.MOUSE_CLICKED, (e) -> {
TablePosition<Person, ?> focusedCellPos = table.getFocusModel()
.getFocusedCell();
if (table.getEditingCell() == null) {
table.edit(focusedCellPos.getRow(),
focusedCellPos.getTableColumn());
}
});
// use modified standard combo cell shows its popup on startEdit
firstName.setCellFactory(cb -> new ComboBoxTableCell<>(firstNames) {
#Override
public void startEdit() {
super.startEdit();
if (isEditing() && getGraphic() instanceof ComboBox) {
// needs focus for proper working of esc/enter
getGraphic().requestFocus();
((ComboBox<?>) getGraphic()).show();
}
}
});

Answer 2

Maybe not the cleanest solution to this problem, but I found a workaround to make the ComboBoxTableCells drop down its menu in just 1 click:
column.setCellFactory(new Callback<TableColumn<Person, String>, TableCell<Person, String>>() {
#Override
public TableCell<Person, String> call(TableColumn<Person, String> column) {
ComboBoxTableCell cbtCell = new ComboBoxTableCell<>(cbValues);
cbtCell.setOnMouseEntered(new EventHandler<Event>() {
#Override
public void handle(Event event) {
// Without a Person object, a combobox shouldn't open in that row
if (((Person)((TableRow)cbtCell.getParent()).getItem()) != null) {
Robot r = new Robot();
r.mouseClick(MouseButton.PRIMARY);
r.mouseClick(MouseButton.PRIMARY);
}
}
});
return cbtCell;
}
});
PS: I know that this topic is a bit old, but I also stumbled upon this problem recently and could not find any working solution to it online. As I sad, it's not the cleanest workaround, but at least it does its job. ;)