Creating custom JButton from images containing transparent pixels

Question

Read edit 2 for what I\'m actually missing to make it work

I\'m currently trying to create some custom JButtons using images created in photoshop that have an

Answer 1

If you have a round button, this is exactly what you need:

  public class RoundButton extends JButton {

       public RoundButton() {
         this(null, null);
      }
       public RoundButton(Icon icon) {
         this(null, icon);
      }
       public RoundButton(String text) {
         this(text, null);
      }
       public RoundButton(Action a) {
         this();
         setAction(a);
      }

       public RoundButton(String text, Icon icon) {
         setModel(new DefaultButtonModel());
         init(text, icon);
         if(icon==null) return;
         setBorder(BorderFactory.createEmptyBorder(0,0,0,0));
         setContentAreaFilled(false);
         setFocusPainted(false);
         initShape();
      }

    protected Shape shape, base;
    protected void initShape() {
      if(!getBounds().equals(base)) {
        Dimension s = getPreferredSize();
        base = getBounds();
        shape = new Ellipse2D.Float(0, 0, s.width, s.height);
      }
    }
    @Override public Dimension getPreferredSize() {
      Icon icon = getIcon();
      Insets i = getInsets();
      int iw = Math.max(icon.getIconWidth(), icon.getIconHeight());
      return new Dimension(iw+i.right+i.left, iw+i.top+i.bottom);
    }

    @Override public boolean contains(int x, int y) {
      initShape();
      return shape.contains(x, y);
      //or return super.contains(x, y) && ((image.getRGB(x, y) >> 24) & 0xff) > 0;
    }
  }

JButton has a contains() method. Override it and call it on mouseReleased();