Java-Buddy

Example to change ViewPort of ImageView, and rotate ImageView.

package javafx_imageview_viewport;
import javafx.application.Application;
import javafx.beans.value.ObservableValue;
import javafx.geometry.Rectangle2D;
import javafx.scene.Scene;
import javafx.scene.control.Slider;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
/**
 * @web http://java-buddy.blogspot.com/
 */
public class JavaFX_ImageView_Viewport extends Application {
 
 @Override
 public void start(Stage primaryStage) {
 
 ImageView imageView1 = new ImageView(new Image("http://goo.gl/kYEQl"));
 
 //Example to rotate ImageView
 Image image2 = new Image("http://goo.gl/kYEQl");
 Rectangle2D viewportRect2 = new Rectangle2D(
 image2.getWidth()/4, 
 image2.getHeight()/4, 
 image2.getWidth()*3/4, 
 image2.getHeight()*3/4);
 ImageView imageView2 = new ImageView(image2);
 imageView2.setViewport(viewportRect2);
 
 Slider sliderRotate = new Slider();
 sliderRotate.setMin(0);
 sliderRotate.setMax(360);
 sliderRotate.setValue(0);
 sliderRotate.valueProperty().addListener(
 (ObservableValue<? extends Number> observable, 
 Number oldValue, Number newValue) -> {
 imageView2.setRotate((double)newValue);
 });
 
 //Example to change ViewPort
 Image image3 = new Image("http://goo.gl/kYEQl");
 Rectangle2D viewportRect3 = new Rectangle2D(
 0, 
 0, 
 image3.getWidth(), 
 image3.getHeight());
 ImageView imageView3 = new ImageView(image3);
 imageView3.setViewport(viewportRect3);
 
 Slider sliderViewPort = new Slider();
 sliderViewPort.setMin(0);
 sliderViewPort.setMax(1.0);
 sliderViewPort.setValue(1.0);
 sliderViewPort.valueProperty().addListener(
 (ObservableValue<? extends Number> observable, 
 Number oldValue, Number newValue) -> {
 Rectangle2D newViewportRect3 = new Rectangle2D(
 0,
 0,
 (double)newValue*image3.getWidth(),
 (double)newValue*image3.getHeight());
 imageView3.setViewport(newViewportRect3);
 });
 
 VBox vBox = new VBox();
 vBox.getChildren().addAll(imageView1, 
 imageView2, sliderRotate,
 imageView3, sliderViewPort);
 
 StackPane root = new StackPane();
 root.getChildren().add(vBox);
 
 Scene scene = new Scene(root, 300, 350);
 
 primaryStage.setTitle("java-buddy: ImageVIew ViewPort");
 primaryStage.setScene(scene);
 primaryStage.show();
 }
 /**
 * @param args the command line arguments
 */
 public static void main(String[] args) {
 launch(args);
 }
 
}

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