package com.knoldus.javafx;

import javafx.application.Application;

import javafx.event.ActionEvent;

import javafx.event.EventHandler;

import javafx.geometry.Insets;

import javafx.geometry.Pos;

import javafx.scene.Group;

import javafx.scene.Scene;

import javafx.scene.control.Button;

import javafx.scene.image.Image;

import javafx.scene.image.ImageView;

import javafx.scene.input.MouseEvent;

import javafx.scene.layout.*;

import javafx.scene.paint.Color;

import javafx.scene.text.Font;

import javafx.scene.text.FontWeight;

import javafx.scene.text.Text;

import javafx.scene.text.TextAlignment;

import javafx.stage.Stage;

import javafx.stage.StageStyle;

public class JavaFXSeeder extends Application {

    public final Static String ID = “seeder”;

    public static final String SEEDER_CONTAINER_ID = “seeder-container-id”;

    public final static String SEEDER_BACKGROUND_ID = “seeder-background-id”;

    public final static String SEEDER_CONTENT_ID = “seeder-content-id”;

    public final static String SEEDER_CONTROLS_ID = “seeder-controls-id”;

    public final static String SEEDER_LOGO_ID = “seeder-logo-id”;

    public final static String SEEDER_STATUS_ID = “seeder-status-id”;

    public final static String SEEDER_CLOSE_BUTTON_ID = “seeder-close-button-id”;

    public final static String IMAGES = “file:src/main/resources/img”;

    public final static String SEEDER_BACKGROUND = IMAGES + “/seeder-background.jpg”;

    public final static String SEEDER_LOGO = IMAGES + “/seeder-logo.gif”;

    public final static String SEEDER_ICON = IMAGES + “/seeder-icon.jpg”;

    public final static String SEEDER_CLOSE_BUTTON = IMAGES + “/seeder-close-button.png”;

    public final static String SEEDER_CLOSE_BUTTON_HOVERED = IMAGES + “/seeder-close-button-hovered.png”;

    public final static String SEEDER_STAGE_TITLE = “Loader”;

    public final static String SEEDER_STATUS = “Loading”;

    public final static double SEEDER_CLOSE_BUTTON_SIZE = 24;

    private static final double SEEDER_WIDTH = 768;

    private static final double SEEDER_HEIGHT = 464;

    private static final double SEEDER_LOGO_SIZE = 200;

    private static double xOffset = 0;

    private static double yOffset = 0;

    private final double SEEDER_STATUS_FONT_SIZE = 24;

    private final String SEEDER_STATUS_FONT_FAMILY = “Roboto Medium”;

    private final Color SEEDER_STATUS_COLOR = Color.rgb(25, 25, 25, 1);

    private final Font SEEDER_STATUS_FONT = Font.font(SEEDER_STATUS_FONT_FAMILY, FontWeight.BOLD, SEEDER_STATUS_FONT_SIZE);

    private final StackPane m_seederContainer = new StackPane();

    private final VBox m_seederContent = new VBox();

    private final HBox m_seederControls = new HBox();

    private final ImageView m_seederBackground = new ImageView();

    private final ImageView m_seederLogo = new ImageView();

    private final ImageView m_seederCloseButtonImage = new ImageView();

    private final Text m_seederStatus = new Text();

    private final Button m_seederCloseButton = new Button();

    private final Group m_root = new Group();

    private final Stage m_stage = new Stage();

    private Image m_image;

    public static void main(String[] args) {

        launch(args);

    }

    @Override

    public void start(Stage stage) {

        initialize();

        showSeederWindow();

    }

    private void initialize() {

        Scene scene = new Scene(m_root, SEEDER_WIDTH, SEEDER_HEIGHT);

        m_stage.setScene(scene);

        m_stage.setTitle(JavaFXSeeder.SEEDER_STAGE_TITLE);

        m_stage.setHeight(SEEDER_HEIGHT);

        m_stage.setWidth(SEEDER_WIDTH);

        m_stage.initStyle(StageStyle.TRANSPARENT);

        m_stage.getIcons().addAll(new Image(SEEDER_ICON));

        m_stage.setOnCloseRequest(windowEvent ->

        {

            windowEvent.consume();

            handleCloseEvent();

        });

        m_root.setId(ID);

        StackPane.setAlignment(m_seederContainer, Pos.CENTER);

        m_seederContainer.setId(SEEDER_CONTAINER_ID);

        m_seederContainer.setMaxSize(SEEDER_WIDTH, SEEDER_HEIGHT);

        initializeSeederBackground();

        initializeSeederContent();

        initializeSeederControls();

        m_seederContainer.getChildren().addAll(m_seederBackground, m_seederContent, m_seederControls);

        m_root.getChildren().add(m_seederContainer);

        dragSeeder();

    }

    public void initializeSeederBackground() {

        m_image = new Image(SEEDER_BACKGROUND);

        m_seederBackground.setId(SEEDER_BACKGROUND_ID);

        m_seederBackground.setImage(m_image);

        m_seederBackground.setFitWidth(SEEDER_WIDTH);

        m_seederBackground.setFitHeight(SEEDER_HEIGHT);

    }

    public void initializeSeederContent() {

        initializeSeederLogo();

        initializeSeederStatus();

        m_seederContent.getChildren().addAll(m_seederLogo, m_seederStatus);

        m_seederContent.setId(SEEDER_CONTENT_ID);

        m_seederContent.setSpacing(10);

        m_seederContent.setAlignment(Pos.CENTER);

    }

    public void initializeSeederLogo() {

        m_image = new Image(SEEDER_LOGO);

        m_seederLogo.setId(SEEDER_LOGO_ID);

        m_seederLogo.setImage(m_image);

        m_seederLogo.setFitWidth(SEEDER_LOGO_SIZE);

        m_seederLogo.setFitHeight(SEEDER_LOGO_SIZE);

    }

    public void initializeSeederStatus() {

        m_seederStatus.setText(SEEDER_STATUS);

        m_seederStatus.setId(SEEDER_STATUS_ID);

        m_seederStatus.setFill(SEEDER_STATUS_COLOR);

        m_seederStatus.setFont(SEEDER_STATUS_FONT);

        m_seederStatus.setTextAlignment(TextAlignment.CENTER);

    }

    public void initializeSeederControls() {

        initializeSeederCloseButton();

        m_seederControls.getChildren().addAll(m_seederCloseButton);

        m_seederControls.setId(SEEDER_CONTROLS_ID);

        m_seederControls.setAlignment(Pos.TOP_RIGHT);

    }

    public void initializeSeederCloseButton() {

        m_image = new Image(SEEDER_CLOSE_BUTTON);

        m_seederCloseButtonImage.setImage(m_image);

        m_seederCloseButtonImage.setFitWidth(SEEDER_CLOSE_BUTTON_SIZE);

        m_seederCloseButtonImage.setFitHeight(SEEDER_CLOSE_BUTTON_SIZE);

        m_seederCloseButton.setId(SEEDER_CLOSE_BUTTON_ID);

        m_seederCloseButton.setGraphic(m_seederCloseButtonImage);

        m_seederCloseButton.setBackground(new Background(new BackgroundFill(Color.TRANSPARENT, CornerRadii.EMPTY, Insets.EMPTY)));

        m_seederCloseButton.setOnAction(handleCloseEvent());

        m_seederCloseButton.addEventHandler(MouseEvent.ANY, seederCloseButtonMouseEvent());

    }

    private EventHandler seederCloseButtonMouseEvent() {

        return (EventHandler) event ->

        {

            if (event.getEventType() == MouseEvent.MOUSE_ENTERED) {

                m_image = new Image(SEEDER_CLOSE_BUTTON_HOVERED);

                m_seederCloseButtonImage.setImage(m_image);

            } else if (event.getEventType() == MouseEvent.MOUSE_EXITED) {

                m_image = new Image(SEEDER_CLOSE_BUTTON);

                m_seederCloseButtonImage.setImage(m_image);

            }

        };

    }

    public void showSeederWindow() {

        m_stage.show();

        m_stage.toFront();

        m_stage.setAlwaysOnTop(true);

    }

    private EventHandler handleCloseEvent() {

        return event -> System.exit(0);

    }

    private void dragSeeder() {

        m_seederContainer.setOnMousePressed(event ->

        {

            xOffset = event.getSceneX();

            yOffset = event.getSceneY();

        });

        m_seederContainer.setOnMouseDragged(event ->

        {

            m_stage.setX(event.getScreenX() – xOffset);

            m_stage.setY(event.getScreenY() – yOffset);

        });

    }

}

Let’s examine the procedures for making this JavaFX application:

Set a point of entry:

• An extension of javafx.application is a javafx.application.Application.
• It serves as the JavaFX application’s entry point.

Describe the start method:

• The JavaFXSeeder class implements the start() abstract method of the Application class.
• We will create the full JavaFX graphics code using this way.

Set scene:

• Create javafx.scene.Scene to set the scene. Scene by mentioning the scene graph’s root, where the root is of the javafx.scene.Group.
• Moreover, we can pass two double-type parameters that represent the scene’s height and width.

Set stage:

• Next, we set the javafx.stage.Stage element. Set the stage’s title using the setTitle() method. Use the setScene() function to attach the scene to the stage.
• Use the show() method to display the scene’s contents.
• The scene class’s start method receives the stage object primaryStage as an argument. The platform itself constructs the main stage.
• The stage’s width, height, taskbar icon, and StageStyle can all be customized.
• By calling setAlwaysOnTop() on the stage object, we can also put our application on top of other applications.

Set Outer-Layout

• Here, JavaFX.scene.layout.StackPane serves as the top-level layout node and arranges its children back-to-front.
• We can give this StackPane a special ID and dimensions.
• By using the setOnMousePressed() and setOnMouseDragged() event handlers, we can additionally add mouse-drag events to the outside layout.
• With setAlignment(), position the layout on the screen.

Set inner-layout: 

• The Image, javafx.scene.layout.HBox, and javafx.scene.layout.VBox nodes are the three child nodes of the outer layout node.
• HBox distributes its content nodes horizontally in a single row. VBox’s content nodes are placed in a single column vertically.
• With getChildren(), we may add() nodes to a layout control.
• add() and getChildren() for a single node.
• For numerous nodes, use addAll().

Set controls: 

• The package javafx.scene.control of JavaFX has a considerable number of controls (or components).
• Build a button control and set it in the window’s upper right corner. By using the setOnAction() function, bind a javafx.event.EventHandler to the Button.
• The JavaFX.scene.shape can be embedded.
• By launching this class, text can be inserted into a JavaFX scene. The text’s font, color, position, etc., can all be customized.
• By creating an instance of the javafx.scene.image.Image class, we may load an image in JavaFX.
• Image. By creating an instance of the ImageView class and sending the picture to its function Object() { [native code] } once the image has been loaded, we may set the image’s view.

Launch the application: 

• Using the launch() method, the application must be launched in the main() method.
• Internally, this method invokes the Application class’s start() method.

Quick Recap

We discussed JavaFX and its amazing potential in this essay. We were aware of JavaFX’s main selling points. We looked at the JavaFX application structure and how a graphics application may be modeled using the scene, stage, scene graph, and nodes. We learned that JavaFX offers a substantial number of integrated GUI components. Next, we developed a JavaFX application and investigated how it operated. Get top niche JavaFX skills at SLA, the Best Java Training Institute in Chennai.