javafx.scene.Scene#getRoot ( )源码实例Demo

public static void renderMeasuredProbabilities(int[] results) {
    CategoryAxis xAxis = new CategoryAxis();
    NumberAxis yAxis = new NumberAxis();
    BarChart<String, Integer> barChart = new BarChart(xAxis, yAxis);
    barChart.setData(getChartData(results));
    barChart.setTitle("Measured probability distribution");
    StackPane root = new StackPane();
    root.getChildren().add(barChart);
    if (myStage != null) {
        Scene oldscene = myStage.getScene();
        VBox box = (VBox)(oldscene.getRoot());
        oldscene.setRoot(new StackPane());
        box.getChildren().add(root);
        Scene newScene = new Scene(box);
        newScene.getStylesheets().add(Main.class.getResource("/styles.css").toExternalForm());
        myStage.setScene(newScene);
    } else {
        Stage stage = new Stage();
        stage.setScene(new Scene(root, 640, 480));
        stage.show();
    }

}
 

/**
 * Add the Windows menu
 */
public static void addWindowsMenu(final Scene scene) {
  Parent rootNode = scene.getRoot();
  if (rootNode instanceof Pane) {
    Pane rootPane = (Pane) rootNode;
    MenuBar menuBar = new MenuBar();
    menuBar.setUseSystemMenuBar(true);
    menuBar.getMenus().add(new WindowsMenu());
    rootPane.getChildren().add(menuBar);
  }
}
 

public static <T extends Object> void doBlockingAsyncWork(Scene scene, Supplier<T> action, Consumer<T> success,
		Consumer<Throwable> error) {
	Parent originalRoot = scene.getRoot();
	Runnable blockScreen = () -> originalRoot.setDisable(true);
	Runnable unblockScreen = () -> originalRoot.setDisable(false);

	Task<T> task = new Task<T>() {
		@Override
		protected T call() throws Exception {
			blockScreen.run();
			return action.get();
		}

		@Override
		protected void succeeded() {
			unblockScreen.run();
			success.accept(getValue());
		}

		@Override
		protected void failed() {
			unblockScreen.run();
			error.accept(getException());
		}
	};
	Thread t = new Thread(task);
	t.setDaemon(true);
	t.start();
}
 

@Override
public void start(Stage stage) {
    stage.setTitle("ComboBoxSample");
    Scene scene = new Scene(new Group(), 500, 270);

    final ComboBox emailComboBox = new ComboBox();
    emailComboBox.getItems().addAll("[email protected]", "[email protected]", "[email protected]",
            "[email protected]", "[email protected]");

    emailComboBox.setPromptText("Email address");
    emailComboBox.setEditable(true);
    emailComboBox.setOnAction((Event ev) -> {
        address = emailComboBox.getSelectionModel().getSelectedItem().toString();
    });

    final ComboBox priorityComboBox = new ComboBox();
    priorityComboBox.getItems().addAll("Highest", "High", "Normal", "Low", "Lowest");
    priorityComboBox.setValue("Normal");
    priorityComboBox.setCellFactory(new Callback<ListView<String>, ListCell<String>>() {
        @Override
        public ListCell<String> call(ListView<String> param) {
            final ListCell<String> cell = new ListCell<String>() {
                {
                    super.setPrefWidth(100);
                }

                @Override
                public void updateItem(String item, boolean empty) {
                    super.updateItem(item, empty);
                    if (item != null) {
                        setText(item);
                        if (item.contains("High")) {
                            setTextFill(Color.RED);
                        } else if (item.contains("Low")) {
                            setTextFill(Color.GREEN);
                        } else {
                            setTextFill(Color.BLACK);
                        }
                    } else {
                        setText(null);
                    }
                }
            };
            return cell;
        }

    });

    button.setOnAction((ActionEvent e) -> {
        if (emailComboBox.getValue() != null && !emailComboBox.getValue().toString().isEmpty()) {
            notification.setText("Your message was successfully sent" + " to " + address);
            emailComboBox.setValue(null);
            if (priorityComboBox.getValue() != null && !priorityComboBox.getValue().toString().isEmpty()) {
                priorityComboBox.setValue(null);
            }
            subject.clear();
            text.clear();
        } else {
            notification.setText("You have not selected a recipient!");
        }
    });

    GridPane grid = new GridPane();
    grid.setVgap(4);
    grid.setHgap(10);
    grid.setPadding(new Insets(5, 5, 5, 5));
    grid.add(new Label("To: "), 0, 0);
    grid.add(emailComboBox, 1, 0);
    grid.add(new Label("Priority: "), 2, 0);
    grid.add(priorityComboBox, 3, 0);
    grid.add(new Label("Subject: "), 0, 1);
    grid.add(subject, 1, 1, 3, 1);
    grid.add(text, 0, 2, 4, 1);
    grid.add(button, 0, 3);
    grid.add(notification, 1, 3, 3, 1);

    Group root = (Group) scene.getRoot();
    root.getChildren().add(grid);
    stage.setScene(scene);
    stage.show();

}
 

@Override
public void start(Stage stage) {
    stage.setTitle("TitledPane");
    Scene scene = new Scene(new Group(), 450, 250);

    TitledPane gridTitlePane = new TitledPane();
    GridPane grid = new GridPane();
    grid.setVgap(4);
    grid.setPadding(new Insets(5, 5, 5, 5));
    grid.add(new Label("First Name: "), 0, 0);
    grid.add(new TextField(), 1, 0);
    grid.add(new Label("Last Name: "), 0, 1);
    grid.add(new TextField(), 1, 1);
    grid.add(new Label("Email: "), 0, 2);
    grid.add(new TextField(), 1, 2);
    grid.add(new Label("Attachment: "), 0, 3);
    grid.add(label, 1, 3);
    gridTitlePane.setText("Grid");
    gridTitlePane.setContent(grid);

    final Accordion accordion = new Accordion();

    for (int i = 0; i < imageNames.length; i++) {
        images[i] = new Image(getClass().getResourceAsStream(imageNames[i] + ".jpg"));
        pics[i] = new ImageView(images[i]);
        tps[i] = new TitledPane(imageNames[i], pics[i]);
    }
    accordion.getPanes().addAll(tps);

    accordion.expandedPaneProperty()
            .addListener((ObservableValue<? extends TitledPane> ov, TitledPane old_val, TitledPane new_val) -> {
                if (new_val != null) {
                    label.setText(accordion.getExpandedPane().getText() + ".jpg");
                }
            });

    HBox hbox = new HBox(10);
    hbox.setPadding(new Insets(20, 0, 0, 20));
    hbox.getChildren().setAll(gridTitlePane, accordion);

    Group root = (Group) scene.getRoot();
    root.getChildren().add(hbox);
    stage.setScene(scene);
    stage.show();
}