TextHitInfo Demo: tell you which is the letter you are clicking

     
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.font.FontRenderContext;
import java.awt.font.TextHitInfo;
import java.awt.font.TextLayout;

import javax.swing.JFrame;
import javax.swing.JPanel;

public class TextHitInfoDemo extends JPanel {
  private TextLayout mTextLayout;

  private int mX = 40, mY = 80;

  public TextHitInfoDemo() {
    addMouseListener(new MouseAdapter() {
      public void mouseClicked(MouseEvent me) {
        TextHitInfo hit = mTextLayout.hitTestChar(me.getX() - mX, me
            .getY()
            - mY);
        System.out.println(hit);
      }
    });
  }

  public void paint(Graphics g) {
    Graphics2D g2 = (Graphics2D) g;

    g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
        RenderingHints.VALUE_ANTIALIAS_ON);

    String s = "Java Source and Support";
    Font font = new Font("Serif", Font.PLAIN, 32);

    if (mTextLayout == null) {
      FontRenderContext frc = g2.getFontRenderContext();
      mTextLayout = new TextLayout(s, font, frc);
    }

    mTextLayout.draw(g2, mX, mY);
  }
  public static void main(String[] args) {
    JFrame f = new JFrame();
    f.getContentPane().add(new TextHitInfoDemo());
    f.setSize(200, 200);
    f.show();
  }
  
}

Related examples in the same category

1.	JFreeChart: Draw String Demo
2.	Unicode: test layout
3.	Unicode display
4.	Line break for textlayout
5.	Mouse hit and textlayout
6.	TextLayout demo
7.	Draw text along a curve
8.	TextAttribute: Underline and strike through
9.	TextAttribute: color and font
10.	Hightlight text by drag and selection
11.	LineMetrics: the metrics to layout characters along a line
12.	Paragraph Layout
13.	Caret action
14.	Caret and TextLayout
15.	Another Line Break Demo
16.	A display of text, formatted by us instead of by AWT/Swing
17.	Draw text with TextLayout
18.	Drawing a Paragraph of Text
19.	Getting the Shape from the Outline of Text
20.	Drawing Text with Mixed Styles
21.	Drawing multi-line text with AttributedString and LineBreakMeasurer
22.	Draws the string at the specified location underlining the specified character
23.	Renders a paragraph of text (line breaks ignored) to an image (created and returned).

TextHitInfo Demo: tell you which is the letter you are clicking : Text Layout « 2D Graphics GUI « Java

Related examples in the same category