Develop Reference

How to send and apply text from label of one Controller to label in other Controller?

I'm making an application with JavaFX and Scene Builder.
I have two controllers:Controller and FontController
I have Main class that launch my program and open Stage with first fontroller (Controller)
public class Main extends Application {
public static void main(String[] args) {
launch(args);
}
#Override
public void start(Stage primaryStage) throws Exception {
try {
Parent root = FXMLLoader.load(getClass().getResource("/card/card.fxml"));
Scene scene = new Scene(root, 1600, 600);
primaryStage.setScene(scene);
scene.getStylesheets().add(getClass().getResource("style.css").toExternalForm());
primaryStage.initStyle(StageStyle.UNDECORATED);
primaryStage.setMaximized(true);
primaryStage.setResizable(true);
primaryStage.getIcons().add(new Image("card/resources/logo-icon.png"));
primaryStage.show();
//adding resize and drag primary stage
ResizeHelper.addResizeListener(primaryStage);
//assign ALT+ENTER to maximize window
final KeyCombination kb = new KeyCodeCombination(KeyCode.ENTER, KeyCombination.CONTROL_DOWN);
scene.addEventHandler(KeyEvent.KEY_PRESSED, new EventHandler<KeyEvent>() {
#Override
public void handle(KeyEvent event) {
if (kb.match(event)) {
primaryStage.setMaximized(!primaryStage.isMaximized());
primaryStage.setResizable(true);
}
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
}
There is a label and a button in Controller. When I click on the button a method is called and new window with second controller appears(FontController):
#FXML private Button btnFont;
#FXML private Label category1
#FXML
void changeFont(ActionEvent event) {
try {
FXMLLoader fxmlLoader = new
FXMLLoader(getClass().getResource("font.fxml"));
Parent rootFont = (Parent) fxmlLoader.load();
Stage stage = new Stage();
stage.setTitle("Select Font");
stage.setScene(new Scene(rootFont));
stage.show();
} catch (Exception e) {
System.out.println("can't load new window");
}
}
There is the button "OK" and label in FontCOntroller:
#FXML private Label fontLabel;
#FXML private Button btnFontOk;
Please tell me, what should I do to send and apply text from label in FontController when I click on the burtton "OK" to label in Controller?

SOLUTION FOUND:
I created class "Context" in my project directory to make all controllers communicate each other. You can add as many controllers as you want there.
Here it looks like:
package card;
public class Context {
private final static Context instance = new Context();
public static Context getInstance() {
return instance;
}
private Controller controller;
public void setController(Controller controller) {
this.controller=controller;
}
public Controller getController() {
return controller;
}
private FontController fontController;
public void setFontController(FontController fontController) {
this.fontController=fontController;
}
public FontController getFontController() {
return fontController;
}
}
Controller:
I created getters and setters (ALT + Insert in IDEA) for Label that I wanna change
public Label getCategory1() {
return category1;
}
public void setCategory1(Label category1) {
this.category1 = category1;
}
To get FontController variables and methods through Context class I placed line of code
//getting FontController through Context Class
FontController fontCont = Context.getInstance().getFontController();
I registered Controller in Context class through my initialize method (my class implements Initializable)
#FXML
public void initialize(URL location, ResourceBundle resources) {
//register Controller in Context Class
Context.getInstance().setController(this);
}
FontController:
to get Controller variables and methods I placed this code:
//getting Controller variables and methods through Context class
Controller cont = Context.getInstance().getController();
I also registered FontController in Context class through initialize method:
#Override
public void initialize(URL location, ResourceBundle resources) {
//register FontController in Context Class
Context.getInstance().setFontController(this);
}
Method that send text and text color from label in this FontController to label in Controller when I click on button:
#FXML
void applyFont(ActionEvent event) {
cont.getCategory1().setText(fontLabel.getText());
cont.getCategory1().setTextFill(fontLabel.getTextFill());
}
*By creating Context class you can make controllers communicate each other and create as many controllers as you want there. Controllers see variables and methods of each other

JavaFX LoadException while loading FXML file

Every time I ran JavaFX app I encounter the error below.
15:11:52.778 [JavaFX Application Thread] ERROR org.fhl.Manifesto - javafx.fxml.LoadException:
/C:/ManGenFX/target/classes/dataController.fxml
/C:/ManGenFX/target/classes/ManifestoMain.fxml:7
But it only happens if I add the initialize method on Main Controller.
public class MainController{
#FXML
GenerateController genCont;
#FXML
private Pane generatePane;
#FXML
AnchorPane mainFx;
private Node source;
//Other Button, TextFields and Labels declaration
#FXML
private void browseFile(ActionEvent x) {
//Browse file definition
}
#FXML
private void savePath(ActionEvent x) {
//Save file definition
}
//Problem with this method
#FXML
public void initialize() {
System.out.println("Initialize generate controller panel");
logger.info("Initialize generate controller panel");
genCont.init(this);
}
}
If I remove the initialize method on MainController class it will not throw any error but nothing happens either if I click on the generate button which is defined in GenerateController class below.
public class GenerateController {
#FXML
Button btnGenerate;
#FXML
Pane paneGen;
#FXML
public void generateMan(ActionEvent event) {
//generateMan body when Generate button is clicked
}
public void init(MainController mc) {
System.out.println("Init mainControl");
mainControl = mc;
}
public void validate() {
//Definition of method body here
}
}
This is the main Class
public class Man extends Application {
private Stage mainStage;
#Override
public void start(Stage primaryStage) {
this.mainStage = primaryStage;
this.mainStage.setTitle("Manifest");
try{
Parent root = FXMLLoader.load(getClass().getResource("/ManifestoMain.fxml"));
Scene sMain = new Scene(root);
mainStage.setScene(sMain);
mainStage.show();
}catch(IOException ioE) {
logger.error(ioE);
}
}
public static void main(String[] args) {
launch(args);
}
}
Also, I placed my dataController.fxml, ManifestoMain.fxml, and generateView.fxml under resources folder but it don't have any problem accessing the files. Appreciate help on this.

Eliminating Previous Scene After New Scene Is Shown

I am just beginning to learn JAVAFX and I have run into a problem now. I have a login screen and after I clicked login, a dialog box appeared and the problem is I don't know how to eliminate the login screen after the dialog has showed up. Please help me. This is my code
Main.java (contains login screen)
public class Main extends Application {
#Override
public void start(Stage primaryStage) throws Exception{
Parent root = FXMLLoader.load(getClass().getResource("../view/LoginScreen.fxml"));
primaryStage.setTitle("Weltes Mart O2 Tank Module");
primaryStage.setScene(new Scene(root));
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
LoginController.java (showing a dialog box)
public class LoginController {
#FXML private Text loginStatusMessage;
#FXML private Button btnLogin;
#FXML public void handleLoginButton(ActionEvent event){
System.out.println("BUTTON PRESSED");
try {
Parent root = FXMLLoader.load(getClass().getResource("../view/LoginSuccessDialog.fxml"));
Stage primaryStage = new Stage();
primaryStage.setScene(new Scene(root));
primaryStage.show();
} catch (Exception e) {
e.printStackTrace();
return;
}
}
}

You can use any Node in a Scene to get a reference to that scene. You can use a Scene to get the Window that contains it. You can close that window.
Assuming the Node fields are actually injected by the loader, you can close the Stage using this code:
btnLogin.getScene().getWindow().hide();

Change label text in a new scene which was entered in different scene (javafx)

I'm trying to change a text in a label, a text which was entered in a text field in a different scene.
I made 2 FXML files, the first one contains a textfield and "ok" button, the second one contains a label(with the text "Label").
My goal is to enter a text in the textfield, and when I press "ok"-> open the new scene and the label will change it's text to the text I entered in the text field.
I easily changed the label text when the label, the textfield and the ok button were all in the same scene, but when I do it while opening a new scene I fail...
After some research, I made a controller for each FXML file, and a "MainController" that will communicate between them.
This is my main class:
public class MainBanana extends Application {
#Override
public void start(Stage primaryStage) throws IOException {
Parent root = FXMLLoader.load(getClass().getResource("view/Welcome.fxml"));
Scene scene = new Scene(root);
primaryStage.setTitle("MokaApp");
primaryStage.setScene(scene);
primaryStage.show();
primaryStage.setResizable(false);
}
public static void main(String[] args) {
launch(args);
}
}
my first scene controller:
public class WelcomeController {
#FXML
public TextField nameField;
#FXML
private Button okButton;
private MainController main;
#FXML
public void okClicked(ActionEvent event) throws IOException{
Parent root = FXMLLoader.load(getClass().getResource("Person.fxml"));
okButton.getScene().setRoot(root);
System.out.println(nameField.getText());
main.setLblFromTf(nameField.getText());
}
public void init(MainController mainController) {
main=mainController;
}
}
second scene controller:
public class PersonController {
#FXML
public Label nameLabel;
private MainController main;
public void init(MainController mainController) {
main=mainController;
}
}
When I launch the program, The Welcome scene is opened, I enter a text to the textfield, but whenever I press the "ok" button, the scene changes to the second scene, but the label text stays the same(label) and I get a nullpointerexception error on this line(located in WelcomeController): main.setLblFromTf(nameField.getText());
Sorry for the long post..

You don't need the references to MainController all over the place.
The easiest way is:
public class PersonController {
#FXML
private Label nameLabel ;
public void setName(String name) {
nameLabel.setText(name);
}
}
Then you can do
public class WelcomeController {
#FXML
private TextField textField ;
#FXML
private Button okButton ;
#FXML
public void okClicked() throws IOException {
FXMLLoader loader = new FXMLLoader(getClass().getResource("Person.fxml"));
Parent root = loader.load();
PersonController personController = loader.getController();
personController.setName(textField.getText());
okButton.getScene().setRoot(root);
}
}

JavaFx Transparent window - yes please. Mouse transparent - no thanks

I would like to create a simple JavaFx class that shows the user a translucent rectangle (say an arbitrary 50% transparency) covering the users screen. It should simply allow me to get the Point of a mouse click event. This sounds trivial, but when I create transparent windows they always seem to be transparent to mouse events rather than just my requirement of semi-transparent visibility. The mouse event is never triggered.
I've used setMouseTransparent(false) on the rectangle and the root pane, but this makes no difference. I'd be really grateful if somebody could indicate any errors/misconceptions.
Here's the trivial test class I have created:
public class ClickScreen implements MouseListener {
private ClickScreenListener listener;
private Stage window;
private Point point;
public ClickScreen(ClickScreenListener listener) {
// Get screen size
Rectangle2D r = Screen.getPrimary().getBounds();
// Something to put stuff in
StackPane root = new StackPane();
// Translucent rectangle on the pane
Rectangle rectangle = new Rectangle(r.getWidth(), r.getHeight());
rectangle.setFill(Color.rgb(183, 183, 183, 0.5));
root.getChildren().add(rectangle);
Scene scene = new Scene(root, r.getWidth(), r.getHeight());
scene.setFill(null);
window = new Stage();
window.initStyle(StageStyle.TRANSPARENT);
window.setTitle("Click drop location");
window.setScene(scene);
this.listener = listener;
}
public Point getLocation(){
return point;
}
#Override
public void mouseClicked(MouseEvent e) {
point = e.getLocationOnScreen();
listener.screenClicked(point);
}
}
Edit:
A simpler example of the transparency issue I am experiencing is from this Hello World! example. When I mouse over the button, it's about 50:50 chance of clicking the button or just clicking "through" and giving focus to the underlying window (which is usually eclipse in my case). Would love you thoughts on this.
public class HelloWorld extends Application {
public static void main(String[] args) {
launch(args);
}
#Override
public void start(Stage primaryStage) {
primaryStage.setTitle("Hello World!");
Button btn = new Button();
btn.setText("Say 'Hello World'");
btn.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
System.out.println("Hello World!");
}
});
StackPane root = new StackPane();
root.getChildren().add(btn);
Scene scene = new Scene(root, 300, 250);
scene.setFill(null);
primaryStage.setScene(scene);
primaryStage.initStyle(StageStyle.TRANSPARENT);
primaryStage.show();
}
}

Check your Imports
You are using some kind of weird setup where you are mixing AWT/Swing classes and JavaFX classes, which really isn't advised (and doesn't work at all in the combination and manner you have used). Just be careful in your JavaFX programs not to import any java.awt.* or javax.swing.* classes unless you really know what you are doing in mixing code for two different toolkits.
Sample Solution
Here is a sample solution which imports only JavaFX classes and utilizes JavaFX events, but otherwise tries to stick to the coding/callback style of the sample code in your question. (The sample could be further simplified through use of Java 8 lambdas).
import javafx.application.Application;
import javafx.event.*;
import javafx.geometry.*;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.*;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.stage.*;
public class ClickListenerSample
extends Application
implements ClickScreenListener {
private Label clickFeedbackLabel = new Label("");
#Override public void start(Stage stage) {
Button listen = new Button("listen");
listen.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
new ClickScreen(ClickListenerSample.this);
}
});
VBox layout = new VBox(10);
layout.getChildren().setAll(
listen,
clickFeedbackLabel
);
layout.setPadding(new Insets(10));
stage.setScene(new Scene(layout, 100, 80));
stage.show();
}
public static void main(String[] args) {
launch(args);
}
#Override public void screenClicked(Point2D point) {
clickFeedbackLabel.setText(point.getX() + ", " + point.getY());
}
}
interface ClickScreenListener {
void screenClicked(Point2D point);
}
class ClickScreen {
private ClickScreenListener listener;
private Stage window;
private Point2D point;
public ClickScreen(ClickScreenListener listener) {
// Get screen size
Rectangle2D r = Screen.getPrimary().getBounds();
// Something to put stuff in
StackPane root = new StackPane();
root.setStyle("-fx-background-color: null;");
// Translucent rectangle on the pane
Rectangle rectangle = new Rectangle(r.getWidth(), r.getHeight());
rectangle.setFill(Color.rgb(183, 183, 183, 0.5));
root.getChildren().add(rectangle);
Scene scene = new Scene(root, r.getWidth(), r.getHeight());
scene.setFill(null);
window = new Stage();
window.initStyle(StageStyle.TRANSPARENT);
window.setTitle("Click drop location");
window.setScene(scene);
scene.setOnMouseClicked(new EventHandler<MouseEvent>() {
#Override
public void handle(MouseEvent event) {
point = new Point2D(event.getScreenX(), event.getScreenY());
listener.screenClicked(point);
window.hide();
}
});
window.show();
this.listener = listener;
}
public Point2D getLocation(){
return point;
}
}