// TTextLayout2.java

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.font.*;
import java.awt.geom.*;

public class TTextLayout2 extends JFrame {
    public TTextLayout2(String title) {
        super(title);
        setBackground(Color.white);
    }

    public static void main(String arg[]) {
        TTextLayout2 frame = new TTextLayout2("TTextLayout2");
        frame.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {System.exit(0);}
        });
        frame.getContentPane().add("Center", new DisplayPanel());
        frame.pack();
        frame.setSize(new Dimension(400,300));
        frame.show();
    }
}

class DisplayPanel extends JPanel {
    TextLayout layout;
    FontRenderContext frc; 
    Font font;
    Rectangle2D rect;
    float rx, ry, rw, rh;

    TextHitInfo hitInfo;
    Color caretColor;
    int hit1, hit2;
    int w, h;
    
    public DisplayPanel() {
        setBackground(Color.white);
        setForeground(Color.black);
        setSize(400, 200);
        addMouseListener(new MouseHandler());
        addMouseMotionListener(new MouseMotionHandler());
        w = getWidth(); h = getHeight();

        String text = "This is Java2D text!";
        font = new Font("Arial", Font.PLAIN, 36);
        frc = new FontRenderContext(null, false, false);
        layout  = new TextLayout(text, font, frc);
        
        rx = (float) (w/2-layout.getBounds().getWidth()/2);
        ry = (float) 3*h/4;
        rw = (float) (layout.getBounds().getWidth());
        rh = (float) (layout.getBounds().getHeight());
        rect = new Rectangle2D.Float(rx, ry, rw, rh);

        caretColor = getForeground();
    }

    public void update(Graphics g) {
        g.clearRect(0, 0, getWidth(), getHeight());
        paintComponent(g);
    }

    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        Graphics2D g2 = (Graphics2D) g;

        // Create an instance of translated affine transform
        AffineTransform at = AffineTransform.getTranslateInstance(rx, ry);

        // First draw the highlighted shape
        Shape hilight = layout.getLogicalHighlightShape(hit1, hit2);
        hilight = at.createTransformedShape(hilight);
        g2.setColor(Color.lightGray);
        g2.fill(hilight); 

        // Draw text, centering it horizontally in the frame 
        g2.setColor(Color.black);
        layout.draw(g2, rx, ry);

        // Draw caret
        Shape[] caretShapes = layout.getCaretShapes(hit1);
        Shape caret = at.createTransformedShape(caretShapes[0]);
        g2.setColor(caretColor);
        g2.draw(caret);
    }

    public int getHitLocation(int mouseX, int mouseY) {
        hitInfo = layout.hitTestChar(mouseX, mouseY, rect);
        return hitInfo.getInsertionIndex();
    }

    class MouseHandler extends MouseAdapter {
        public void mouseClicked(MouseEvent e) {
            caretColor = getForeground();
            hit1 = getHitLocation(e.getX(), e.getY());
            hit2 = hit1;
            repaint();
        }

        public void mousePressed(MouseEvent e) {
            caretColor = getForeground();
            hit1 = getHitLocation(e.getX(), e.getY());
            hit2 = hit1;
            repaint();
        }

        public void mouseReleased(MouseEvent e) {
            hit2 = getHitLocation(e.getX(), e.getY());
            repaint();
        }
    }

    class MouseMotionHandler extends MouseMotionAdapter {
        public void mouseDragged(MouseEvent e) {
            caretColor = getBackground();
            hit2 = getHitLocation(e.getX(), e.getY());
            repaint();
        }
    }
}