Usually, we expect cells being updated whenever they are notified about a change in the underlying data. To make certain that a notification is fired by the data on changing a property of an item, we need a list with an extractor on the properties that we are interested in, something like:
ObservableList<CustomObject> data = FXCollections.observableArrayList(
c -> new Observable[] {c.petrifiedProperty()}
);
With that in place the list fires a list change of type update whenever the pretified property changes.
Unfortunately, that's not enough due to a bug in fx: cells are not updated when receiving a listChange of type update from the underlying items. A dirty way around (read: don't use once the bug is fixed, it's using emergency api!) is to install a listener on the items and call table.refresh()
when receiving an update.
An example:
import java.util.logging.Logger;
//import de.swingempire.fx.util.FXUtils;
import javafx.application.Application;
import javafx.beans.Observable;
import javafx.collections.FXCollections;
import javafx.collections.ListChangeListener;
import javafx.collections.ObservableList;
import javafx.scene.Scene;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableRow;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.CheckBoxTableCell;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.control.cell.TextFieldTableCell;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;
import javafx.util.converter.DefaultStringConverter;
/**
* CheckBoxTableCell: update editable state of one column based of
* the boolean in another column
* https://stackoverflow.com/q/46290417/203657
*
* Bug in skins: cell not updated on listChange.wasUpdated
*
* reported as
* https://bugs.openjdk.java.net/browse/JDK-8187665
*/
@SuppressWarnings({ "rawtypes", "unchecked" })
public class TableViewUpdateBug extends Application {
/**
* TableCell that updates state based on another value in the row.
*/
public static class DisableTextFieldTableCel extends TextFieldTableCell {
public DisableTextFieldTableCel() {
super(new DefaultStringConverter());
}
/**
* Just to see whether or not this is called on update notification
* from the items (it's not)
*/
@Override
public void updateIndex(int index) {
super.updateIndex(index);
// LOG.info("called? " + index);
}
/**
* Implemented to change background based on
* visible property of row item.
*/
@Override
public void updateItem(Object item, boolean empty) {
super.updateItem(item, empty);
TableRow<TableColumn> currentRow = getTableRow();
boolean editable = false;
if (!empty && currentRow != null) {
TableColumn column = currentRow.getItem();
if (column != null) {
editable = column.isVisible();
}
}
if (!empty) {
setDisable(!editable);
setEditable(editable);
if (editable) {
this.setStyle("-fx-background-color: red");
} else {
this.setStyle("-fx-background-color: green");
}
} else {
setStyle("-fx-background-color: null");
}
}
}
@Override
public void start(Stage primaryStage) {
// data: list of tableColumns with extractor on visible property
ObservableList<TableColumn> data = FXCollections.observableArrayList(
c -> new Observable[] {c.visibleProperty()});
data.addAll(new TableColumn("first"), new TableColumn("second"));
TableView<TableColumn> table = new TableView<>(data);
table.setEditable(true);
// hack-around: call refresh
data.addListener((ListChangeListener) c -> {
boolean wasUpdated = false;
boolean otherChange = false;
while(c.next()) {
if (c.wasUpdated()) {
wasUpdated = true;
} else {
otherChange = true;
}
}
if (wasUpdated && !otherChange) {
table.refresh();
}
//FXUtils.prettyPrint(c);
});
TableColumn<TableColumn, String> text = new TableColumn<>("Text");
text.setCellFactory(c -> new DisableTextFieldTableCel());
text.setCellValueFactory(new PropertyValueFactory<>("text"));
TableColumn<TableColumn, Boolean> visible = new TableColumn<>("Visible");
visible.setCellValueFactory(new PropertyValueFactory<>("visible"));
visible.setCellFactory(CheckBoxTableCell.forTableColumn(visible));
table.getColumns().addAll(text, visible);
BorderPane root = new BorderPane(table);
Scene scene = new Scene(root, 300, 150);
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
@SuppressWarnings("unused")
private static final Logger LOG = Logger
.getLogger(TableViewUpdateBug.class.getName());
}