package graphics.api.control.scrollview;

import javafx.beans.property.*;
import javafx.application.Application;
import javafx.stage.*;
import javafx.scene.*;
import javafx.scene.control.*;
import javafx.beans.property.IntegerProperty;
import javafx.beans.binding.Bindings;
import javafx.collections.FXCollections;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;

public class ScrollViewDynamicPolicyChange extends Application {

    public static void main(String[] args) {
        ScrollViewDynamicPolicyChange.launch(args);
    }
    IntegerProperty width = new SimpleIntegerProperty(25);
    IntegerProperty height = new SimpleIntegerProperty(10);
    ScrollPane scrollView = new ScrollPane();
    Button button;
    Button button2;
    Button button3;
    Button button4;
    Button button5;
    Scene scene;

    @Override
    public void start(Stage stage) throws Exception {
        double h = 400;
        double w = 400;
        scrollView.setManaged(true);
        scrollView.setPrefWidth(56);
        scrollView.setPrefHeight(23);
        button = new Button("Inside");
        button.prefWidthProperty().bind(width);
        button.prefHeightProperty().bind(height);
        scrollView.setContent(button);
        scrollView.setTranslateX(90);
        scrollView.setTranslateY(20);
        scene = new Scene(new Group(), w, h);


        button2 = new Button("Width " + width);
        button2.textProperty().bind(Bindings.concat("Width ", width));
        button2.setTranslateX(80);
        button2.setTranslateY(100);
        button2.setOnAction(new EventHandler<ActionEvent>() {

            public void handle(ActionEvent t) {
                width.set(width.get() + 5);
                if (width.get() == 65) {
                    width.set(25);
                }

            }
        });
        button3 = new Button("Height " + height);
        button3.textProperty().bind(Bindings.concat("Height ", height));
        button3.setTranslateX(80);
        button3.setTranslateY(130);
        button3.setOnAction(new EventHandler<ActionEvent>() {

            public void handle(ActionEvent t) {
                height.set(height.get() + 2);
                if (height.get() == 38) {
                    height.set(10);
                }
            }
        });
        button4 = new Button("hbar: " + scrollView.getHbarPolicy());
        button4.textProperty().bind(Bindings.concat("hbar: ", scrollView.hbarPolicyProperty()));
        button4.setTranslateX(80);
        button4.setTranslateY(160);
        button4.setOnAction(new EventHandler<ActionEvent>() {

            public void handle(ActionEvent t) {
                if (scrollView.getHbarPolicy().equals(ScrollPane.ScrollBarPolicy.AS_NEEDED)) {
                    scrollView.setHbarPolicy(ScrollPane.ScrollBarPolicy.NEVER);
                } else if (scrollView.getHbarPolicy().equals(ScrollPane.ScrollBarPolicy.NEVER)) {
                    scrollView.setHbarPolicy(ScrollPane.ScrollBarPolicy.ALWAYS);
                } else if (scrollView.getHbarPolicy().equals(ScrollPane.ScrollBarPolicy.ALWAYS)) {
                    scrollView.setHbarPolicy(ScrollPane.ScrollBarPolicy.AS_NEEDED);
                }
                //The following 2 lines is ugly way to force and make Scrollbar follow the policy.
                scrollView.setContent(null);
                scrollView.setContent(button);
            }
        });
        button5 = new Button("vbar: " + scrollView.getVbarPolicy().name());
        System.out.println(scrollView.getVbarPolicy().name());
        button5.textProperty().bind(Bindings.concat("vbar: ", scrollView.vbarPolicyProperty()));
        button5.setTranslateX(80);
        button5.setTranslateY(190);
        button5.setOnAction(new EventHandler<ActionEvent>() {

            public void handle(ActionEvent t) {
                if (scrollView.getVbarPolicy().equals(ScrollPane.ScrollBarPolicy.AS_NEEDED)) {
                    scrollView.setVbarPolicy(ScrollPane.ScrollBarPolicy.NEVER);
                } else if (scrollView.getVbarPolicy().equals(ScrollPane.ScrollBarPolicy.NEVER)) {
                    scrollView.setVbarPolicy(ScrollPane.ScrollBarPolicy.ALWAYS);
                } else if (scrollView.getVbarPolicy().equals(ScrollPane.ScrollBarPolicy.ALWAYS)) {
                    scrollView.setVbarPolicy(ScrollPane.ScrollBarPolicy.AS_NEEDED);
                }
                //The following 2 lines is ugly way to force and make Scrollbar follow the policy.
                scrollView.setContent(null);
                scrollView.setContent(button);
            }
        });
        ((Group) scene.getRoot()).getChildren().clear();
        ((Group) scene.getRoot()).getChildren().addAll(FXCollections.<Control>observableArrayList(scrollView, button2, button3, button4, button5));
        stage.setScene(scene);
        stage.show();
        scrollView.requestFocus();
    }

}