Swing HTML drawString
If a fan of Java2D; but to get the most leverage from HTML in Swing components and layouts, I'd encourage you to use the component approach suggested by @camickr. If necessary, you can use the flyweight renderer approach seen in JTable
, et al, in which a single component is used repeatedly for drawing. The example below is a very simplified outline of the technique, changing only the color and location.
Addendum: Updated example; see also CellRendererPane
and Make your apps fly: Implement Flyweight to improve performance.
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import javax.swing.CellRendererPane;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
/** @see http://stackoverflow.com/questions/7774960 */
public class PaintComponentTest extends JPanel {
private static final int N = 8;
private static final String s = "<html><big><u>Hello</u></html>";
private JLabel renderer = new JLabel(s);
private CellRendererPane crp = new CellRendererPane();
private Dimension dim;
public PaintComponentTest() {
this.setBackground(Color.black);
dim = renderer.getPreferredSize();
this.add(crp);
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
for (int i = 0; i < N; i++) {
renderer.setForeground(Color.getHSBColor((float) i / N, 1, 1));
crp.paintComponent(g, renderer, this,
i * dim.width, i * dim.height, dim.width, dim.height);
}
}
private void display() {
JFrame f = new JFrame("PaintComponentTest");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.add(this);
f.pack();
f.setSize(dim.width * N, dim.height * (N + 1));
f.setLocationRelativeTo(null);
f.setVisible(true);
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
new PaintComponentTest().display();
}
});
}
}
As others have commented, Swing components support HTML 3.2 and basic styles.
For details on how to leverage that ability in the paintComponent(Graphics)
method, see the LabelRenderTest.java
source on this thread.
The approach is to render the label to an image, then render the image to the Graphics
object.