package felipe;

import java.lang.reflect.Method;
import com.sun.javafx.scene.text.HitInfo;
import com.sun.javafx.scene.text.TextLayout;
import javafx.application.Application;
import javafx.collections.ObservableList;
import javafx.event.EventHandler;
import javafx.geometry.Point2D;
import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.input.MouseEvent;
import javafx.scene.paint.Color;
import javafx.scene.text.Text;
import javafx.scene.text.TextFlow;
import javafx.stage.Stage;

public class TextFlowHitTest extends Application {

    public static void main(String[] args) { launch(args); }

    @Override public void start(Stage stage) throws Exception {
        Text text1 = new Text("Lorem ipsum dolor sit amet, ");
        Text text2 = new Text("consectetur adipisicing elit, ");
        Text text3 = new Text("sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.");
        text1.setFill(Color.RED);
        text2.setFill(Color.GREEN);
        text3.setFill(Color.BLUE);
        TextFlow textFlow = new TextFlow(text1, text2, text3);

        Method m = TextFlow.class.getDeclaredMethod("getTextLayout");
        m.setAccessible(true);
        TextLayout layout = (TextLayout)m.invoke(textFlow);

        Scene scene = new Scene(textFlow, 300, 300);
        scene.addEventFilter(MouseEvent.MOUSE_PRESSED, new EventHandler<MouseEvent> () {
            @Override
            public void handle(MouseEvent event) {
                System.out.println(new Point2D(event.getX(), event.getY()));
                HitInfo hit = layout.getHitInfo((float)event.getX(), (float)event.getY());
                ObservableList<Node> nodes = textFlow.getChildren();
                int start = 0;
                for (Node n : nodes) {
                    Text text = (Text)n;
                    String string = text.getText();
                    if (start + string.length() > hit.getCharIndex()) {
                        System.out.println("Click on node " + text.getFill());
                        System.out.println("Node relative offset " + (hit.getCharIndex() - start));
                        System.out.println("TextFlow relative hit " + hit);
                        break;
                    }
                    start += string.length();
                }
            }
        });
        stage.setScene(scene);
        stage.show();
    }
}