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JavaFX - Scaling Transformation
To change the size of an object, scaling transformation is used. In the scaling process, you either expand or compress the dimensions of the object. Scaling can be achieved by multiplying the original coordinates of the object with the scaling factor to get the desired result.
Example
Following is the program which demonstrates scaling in JavaFX. Here, we are creating 2 circles (nodes) at the same location with the same dimensions, but with different colors (Blurywood and Blue). We are also applying scaling transformation on the circle with a blue color.
Save this code in a file with the name ScalingExample.java.
import javafx.application.Application; import javafx.scene.Group; import javafx.scene.Scene; import javafx.scene.paint.Color; import javafx.scene.shape.Circle; import javafx.scene.transform.Scale; import javafx.stage.Stage; public class ScalingExample extends Application { @Override public void start(Stage stage) { //Drawing Circle1 Circle circle1 = new Circle(300, 135, 50); //Setting the color of the circle circle1.setFill(Color.BLUE); //Setting the stroke width of the circle circle1.setStrokeWidth(20); //Drawing Circle2 Circle circle2 = new Circle(300, 135, 50); //Setting the color of the circle circle2.setFill(Color.BURLYWOOD); //Setting the stroke width of the circle circle2.setStrokeWidth(20); //Creating the scale transformation Scale scale = new Scale(); //Setting the dimensions for the transformation scale.setX(1.5); scale.setY(1.5); //Setting the pivot point for the transformation scale.setPivotX(300); scale.setPivotY(135); //Adding the scale transformation to circle1 circle1.getTransforms().addAll(scale); //Creating a Group object Group root = new Group(circle1, circle2); //Creating a scene object Scene scene = new Scene(root, 600, 300); //Setting title to the Stage stage.setTitle("Scaling transformation example"); //Adding scene to the stage stage.setScene(scene); //Displaying the contents of the stage stage.show(); } public static void main(String args[]){ launch(args); } }
Compile and execute the saved java file from the command prompt using the following commands.
javac ScalingExample.java java ScalingExample
On executing, the above program generates a JavaFX window as shown below.
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