Shortcut key table

Question

I'm testing this table with key shortcuts:
import java.util.HashSet;
import java.util.Set;
import javafx.application.Application;
import javafx.beans.property.ReadOnlyObjectWrapper;
import javafx.beans.value.ObservableValue;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.TableCell;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.TextFieldTableCell;
import javafx.scene.input.KeyCharacterCombination;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyCombination;
import javafx.scene.input.KeyEvent;
import javafx.stage.Stage;
import javafx.util.Callback;
public class test extends Application {
    public static void main(String[] args) {
        launch(test .class);
    @Override
    public void start(Stage stage) throws Exception {
        final ObservableList<KeyCharacterCombination> items = FXCollections.observableArrayList();
        for (int i = 0; i < 110; i++) {
            items.add(null);
        TableView<KeyCharacterCombination> table = new TableView<>(items);
        table.setEditable(true);
        final TableColumn<KeyCharacterCombination, KeyCharacterCombination> column = new TableColumn<>();
        column.setCellValueFactory(new Callback<TableColumn.CellDataFeatures<KeyCharacterCombination, KeyCharacterCombination>, ObservableValue<KeyCharacterCombination>>() {
            @Override
            public ObservableValue<KeyCharacterCombination> call(TableColumn.CellDataFeatures<KeyCharacterCombination, KeyCharacterCombination> cellDataFeatures) {
                return new ReadOnlyObjectWrapper<>(cellDataFeatures.getValue());
        column.setMinWidth(530);
        column.setCellFactory(new Callback<TableColumn<KeyCharacterCombination, KeyCharacterCombination>, TableCell<KeyCharacterCombination, KeyCharacterCombination>>() {
            @Override
            public TableCell<KeyCharacterCombination, KeyCharacterCombination> call(TableColumn<KeyCharacterCombination, KeyCharacterCombination> tableColumn) {
                final TableCell<KeyCharacterCombination, KeyCharacterCombination> cell = new TextFieldTableCell<KeyCharacterCombination, KeyCharacterCombination>() {
                    @Override
                    public void updateItem(KeyCharacterCombination keyCharacterCombination, boolean b) {
                        super.updateItem(keyCharacterCombination, b);
                        if (this.getItem() == null || b) {
                            setText(null);
                        } else {
                            StringBuilder sb = new StringBuilder();
                            if (keyCharacterCombination.getControl() == KeyCombination.ModifierValue.DOWN) {
                                sb.append("Ctrl + ");
                            if (keyCharacterCombination.getAlt() == KeyCombination.ModifierValue.DOWN) {
                                sb.append("Alt + ");
                            if (keyCharacterCombination.getShift()== KeyCombination.ModifierValue.DOWN) {
                                sb.append("Shift + ");
                            sb.append(keyCharacterCombination.getCharacter());
                            setText(sb.toString());
                cell.setOnKeyPressed(new EventHandler<KeyEvent>() {
                    Set<KeyCombination.Modifier> keys = new HashSet<>();
                    @Override
                    public void handle(KeyEvent keyEvent) {
                        if (keyEvent.getCode() == KeyCode.CONTROL) {
                            keys.add(KeyCombination.CONTROL_DOWN);
                        } else if (keyEvent.getCode() == KeyCode.ALT) {
                            keys.add(KeyCombination.ALT_DOWN);
                        } else if (keyEvent.getCode() == KeyCode.SHIFT) {
                            keys.add(KeyCombination.SHIFT_DOWN);
                        } else if (keyEvent.getCode().isLetterKey()) {
                            items.set(cell.getIndex(), new KeyCharacterCombination(keyEvent.getCode().getName(),
                                    keys.toArray(new KeyCombination.Modifier[keys.size()])));
                            keys.clear();
                return cell;
        table.getColumns().add(column);
        stage.setScene(new Scene(table));
        stage.show();
There is problem which I cannot solve. For example I can set key combination Ctrl+'D' or Shift+Ctrl+Alt+'G' but I cannot use key combination like Ctrl + 'X' or Ctrl + 'Z'. Can you help to improve this code?

Answer 1

Unfortunately, there are no shortcuts for this. Prior to the Oracle acquisition, Primavera had it as a goal for R7 to allow the operator to keep their hands on the keyboard most of the time, but this feature didn't make it into the final code. I feel your pain!