/*
 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
 */

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.input.KeyEvent;
import javafx.stage.Stage;

import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.geometry.Rectangle2D;
import javafx.stage.Screen;
import javafx.scene.shape.Line;
import javafx.scene.text.Text;
import javafx.scene.text.Font;
import javafx.scene.text.TextAlignment;
import javafx.geometry.Bounds;
import javafx.scene.shape.Circle;
import javafx.scene.paint.Paint;
import javafx.scene.input.MouseEvent;
import javafx.scene.input.TouchEvent;
import javafx.animation.FadeTransition;
import javafx.util.Duration;

public class TouchCalibration extends Application {
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        Application.launch(args);
    }

    static int deltaX;
    static int deltaY;
    static Group pointer;
    static Group root = new Group();
    static Line swCursor_vline = new Line();
    static Line swCursor_hline = new Line();
    @Override public void start(Stage stage) {
        stage.setTitle("Hello Calibration");

        Rectangle2D bounds = Screen.getPrimary().getVisualBounds();
        

        
        //set background
        Rectangle right = new Rectangle(bounds.getWidth()/2, bounds.getHeight());
        right.setX(0);
        right.setY(0);
        right.setFill(Color.LIGHTGRAY);        
        root.getChildren().add(right);

        Rectangle left = new Rectangle(bounds.getWidth()/2, bounds.getHeight());
        left.setX(bounds.getWidth()/2);
        left.setY(0);
        left.setFill(Color.WHITE);        
        root.getChildren().add(left);

        Text rightPaneTitle = new Text("Mirror - inactive");
        rightPaneTitle.setFont(new Font(25));
        rightPaneTitle.setX((right.getWidth()-rightPaneTitle.getLayoutBounds().getWidth())/2);
        rightPaneTitle.setY(50);
        

        Text leftPaneTitle = new Text("Touch the cross-hair on this side and \nsee its reflrection on the right size");
        leftPaneTitle.setFont(new Font(25));
        leftPaneTitle.setX(((right.getWidth()-leftPaneTitle.getLayoutBounds().getWidth())/2) + left.getX());
        leftPaneTitle.setTextAlignment(TextAlignment.CENTER);
        leftPaneTitle.setY(50);
        root.getChildren().addAll(rightPaneTitle, leftPaneTitle);

        //left cross hair
        int leftCrossHairMiddleX = (int)(left.getWidth()/2 +left.getX());
        int leftCrossHairMiddleY = (int)(left.getHeight()/2);

        Group leftCrossHair = createCrossHair(leftCrossHairMiddleX, leftCrossHairMiddleY);

        //add background to listen to events
        Rectangle background = new Rectangle(leftCrossHairMiddleX-150, leftCrossHairMiddleY-150, 300, 300);
        background.setFill(Color.WHITE);
        background.setStroke(Color.BLACK);
        leftCrossHair.getChildren().add(background);
        background.toBack();

        int rightCrossHairMiddleX = (int)(right.getWidth()/2 +right.getX());
        int rightCrossHairMiddleY = (int)(right.getHeight()/2);

        Group rightCrossHair = createCrossHair(rightCrossHairMiddleX, rightCrossHairMiddleY);

        root.getChildren().addAll(rightCrossHair, leftCrossHair);

        deltaX = leftCrossHairMiddleX - rightCrossHairMiddleX;
        deltaY = leftCrossHairMiddleY - rightCrossHairMiddleY;

        background.setOnMouseMoved(new EventHandler<MouseEvent> () {
            @Override
            public void handle(MouseEvent event) {
                int centerX = (int)(event.getX()-deltaX);
                int centerY = (int)(event.getY()-deltaY);
                swCursor_vline.setStartX(centerX);
                swCursor_vline.setEndX(centerX);
                swCursor_vline.setStartY(centerY-10);
                swCursor_vline.setEndY(centerY+10);

                swCursor_hline.setStartX(centerX-10);
                swCursor_hline.setEndX(centerX+10);
                swCursor_hline.setStartY(centerY);
                swCursor_hline.setEndY(centerY);
            }
            });

        background.setOnTouchPressed(new EventHandler<TouchEvent> () {
            @Override
            public void handle(TouchEvent event) {
                int centerX = (int)(event.getTouchPoint().getSceneX()-deltaX);
                int centerY = (int)(event.getTouchPoint().getSceneY()-deltaY);
                swCursor_vline.setStartX(centerX);
                swCursor_vline.setEndX(centerX);
                swCursor_vline.setStartY(centerY-10);
                swCursor_vline.setEndY(centerY+10);

                swCursor_hline.setStartX(centerX-10);
                swCursor_hline.setEndX(centerX+10);
                swCursor_hline.setStartY(centerY);
                swCursor_hline.setEndY(centerY);
            }
            });
         background.setOnTouchMoved(new EventHandler<TouchEvent> () {
            @Override
            public void handle(TouchEvent event) {
                int centerX = (int)(event.getTouchPoint().getSceneX()-deltaX);
                int centerY = (int)(event.getTouchPoint().getSceneY()-deltaY);
                swCursor_vline.setStartX(centerX);
                swCursor_vline.setEndX(centerX);
                swCursor_vline.setStartY(centerY-10);
                swCursor_vline.setEndY(centerY+10);

                swCursor_hline.setStartX(centerX-10);
                swCursor_hline.setEndX(centerX+10);
                swCursor_hline.setStartY(centerY);
                swCursor_hline.setEndY(centerY);
            }
            });

        root.getChildren().addAll(swCursor_vline, swCursor_hline);

        Scene scene = new Scene(root, bounds.getWidth(), bounds.getHeight());
        stage.setScene(scene);
        stage.show();
        stage.requestFocus();
        
    }

    private Group createCrossHair(int x, int y) {
        //create cross-hair
        Group crossHair = new Group();        

        Line hLine = new Line(x - 100, y, x+100, y );
        Line vLine = new Line(x, y  - 100, x, y +100 );
        crossHair.getChildren().addAll(vLine, hLine);

        for (int i = 1 ; i < 4 ; i++) {
            Circle circle = new Circle(x, y, i*20);
            circle.setFill(null);
            circle.setStroke(Color.BLACK);
            circle.setStrokeWidth(1);
            crossHair.getChildren().add(circle);
        }        

        return crossHair;
    }
}