JavaFX | ColorInput Class

ColorInput class is a part of JavaFX. It is used to create an effect which renders a rectangular region, filled with the given Color. It is equivalent to rendering a filled rectangle into an image and using an ImageInput effect, except that it is more convenient and potentially much more efficient. It is mainly passed into the other effects as an input.

Constructors of the class:

1. ColorInput(): Creates a new instance of ColorInput with default parameters.
2. ColorInput(double x, double y, double width, double height, Paint paint): Creates a new instance of ColorInput with the specified x, y, width, height, and paint.

Commonly Used Methods:

1. Java program to Demonstrate ColorInput class: In this program, ColorInput Effect is created and then we set the color, height, width, and coordinates of the region of ColorInput. A group object and scene object is created. A scene is added to the stage and then we set the title of the stage.

   
   

   
   
   

   // Java program to Demonstrate ColorInput class import javafx.application.Application; import javafx.scene.Group; import javafx.scene.Scene; import javafx.scene.effect.ColorInput; import javafx.scene.paint.Color; import javafx.scene.shape.Rectangle; import javafx.stage.Stage;    public class ColorInputDemo extends Application {        // Main Method      public static void main(String[] args)     {            // launch the application         launch(args);     }        // launch the application     public void start(Stage primaryStage) throws Exception     {            // Instantiating the ColorInput class         ColorInput color = new ColorInput();            // set the color         color.setPaint(Color.GREEN);            // sets the height of the region of color input         color.setHeight(50);            // sets the width of the region of color input         color.setWidth(200);            // set the coordinates of the Colorinput         color.setX(90);         color.setY(140);            // create a rectangle         Rectangle rect = new Rectangle();            // applying coloradjust effect         rect.setEffect(color);            // create a group object         Group root = new Group();            // create a scene object         Scene scene = new Scene(root, 400, 300);            root.getChildren().add(rect);            // adding scene to the stage         primaryStage.setScene(scene);            // set title of the stage         primaryStage.setTitle("ColorInput Demo");            primaryStage.show();     } }

   Output:

   

2. Java program to apply ColorInput class to the created rectangle by clicking on the button using EventHandler: In this program, we first set the Height, Width, and coordinates of a rectangle and then create a rectangle of the same dimension. Now, create a Button and set the Layouts of the Button. Now, using EventHandler, first, instantiate a ColorInput class using proper dimension and then set ColorInput Effect to the Button. Create a group object and add Button and rectangle to it. Then Create a Scene and add it to the stage.

   
   

   
   
   

   // Java program to apply ColorInput class to  // the created rectangle by clicking on the  // button using EventHandler import javafx.application.Application; import javafx.event.ActionEvent; import javafx.event.EventHandler; import javafx.scene.Group; import javafx.scene.Scene; import javafx.scene.control.Button; import javafx.scene.effect.ColorInput; import javafx.scene.paint.Color; import javafx.scene.shape.Rectangle; import javafx.stage.Stage;    public class ColorInputExample extends Application {        public void start(Stage stage)     {            double x = 10;         double y = 10;         double w = 40;         double h = 180;            // Rectangle         Rectangle rect = new Rectangle(x, y, w, h);         rect.setFill(Color.WHITE);         rect.setStrokeWidth(1);         rect.setStroke(Color.BLACK);            // Button         Button button = new Button("Click To See the Effects!");            // set button layout coordinates         button.setLayoutX(100);         button.setLayoutY(30);            button.setPrefSize(250, 150);            button.setOnAction(new EventHandler<ActionEvent>() {                public void handle(ActionEvent event)             {                 // instantiating the colorinput class                 ColorInput colorInput = new ColorInput(x, y,                                       w, h, Color.STEELBLUE);                    // Setting ColorInput effect                 button.setEffect(colorInput);             }         });            // create the Group object         Group root = new Group();            root.getChildren().addAll(button, rect);            Scene scene = new Scene(root, 450, 300);         stage.setTitle("JavaFX ColorInput Effect");         stage.setScene(scene);            stage.show();     }        // Main Method     public static void main(String args[])     {            // Launch the application         launch(args);     } }

   Output:

Note: The above programs might not run in an online IDE. Please use an offline compiler.

Reference: https://docs.oracle.com/javafx/2/api/javafx/scene/effect/ColorInput.html