/*
* This is called when we think that the data within this TableCell may have
* changed. You'll note that this is a private function - it is only called
* when one of the triggers above call it.
*/
private void updateItem() {
if (currentObservableValue != null) {
currentObservableValue.removeListener(weaktableRowUpdateObserver);
}
// get the total number of items in the data model
final TableView tableView = getTableView();
final List<T> items =
tableView == null ? FXCollections.<T>emptyObservableList() : tableView.getItems();
final TableColumn tableColumn = getTableColumn();
final int itemCount = items == null ? -1 : items.size();
final int index = getIndex();
final boolean isEmpty = isEmpty();
final T oldValue = getItem();
final boolean indexExceedsItemCount = index >= itemCount;
// there is a whole heap of reasons why we should just punt...
if (indexExceedsItemCount
|| index < 0
|| columnIndex < 0
|| !isVisible()
|| tableColumn == null
|| !tableColumn.isVisible()) {
// RT-30484 We need to allow a first run to be special-cased to allow
// for the updateItem method to be called at least once to allow for
// the correct visual state to be set up. In particular, in RT-30484
// refer to Ensemble8PopUpTree.png - in this case the arrows are being
// shown as the new cells are instantiated with the arrows in the
// children list, and are only hidden in updateItem.
// RT-32621: There are circumstances where we need to updateItem,
// even when the index is greater than the itemCount. For example,
// RT-32621 identifies issues where a TreeTableView collapses a
// TreeItem but the custom cells remain visible. This is now
// resolved with the check for indexExceedsItemCount.
if ((!isEmpty && oldValue != null) || isFirstRun || indexExceedsItemCount) {
updateItem(null, true);
isFirstRun = false;
}
return;
} else {
currentObservableValue = tableColumn.getCellObservableValue(index);
final T newValue = currentObservableValue == null ? null : currentObservableValue.getValue();
// There used to be conditional code here to prevent updateItem from
// being called when the value didn't change, but that led us to
// issues such as RT-33108, where the value didn't change but the item
// we needed to be listening to did. Without calling updateItem we
// were breaking things, so once again the conditionals are gone.
updateItem(newValue, false);
}
if (currentObservableValue == null) {
return;
}
// add property change listeners to this item
currentObservableValue.addListener(weaktableRowUpdateObserver);
}
public <T> void bind(final Property<T> property, final ObservableValue<? extends T> dest) {
InvalidationListener invalidationListener =
new InvalidationListener() {
@Override
public void invalidated(Observable observable) {
property.setValue(dest.getValue());
}
};
WeakInvalidationListener weakInvalidationListener =
new WeakInvalidationListener(invalidationListener);
listeners.put(dest, weakInvalidationListener);
dest.addListener(weakInvalidationListener);
property.setValue(dest.getValue());
hardRefs.add(invalidationListener);
}