package java2d;import java.awt.BorderLayout;import java.awt.Component;import javax.swing.JPanel;import javax.swing.border.*;/** * The panel for the Surface, Custom Controls & Tools. * Other component types welcome. */public class DemoPanel extends JPanel {    public Surface surface;    // public CustomControlsContext ccc;    // public Tools tools;    public String className;    public DemoPanel(Object obj) {        setLayout(new BorderLayout());        try {            if (obj instanceof String) {                className = (String) obj;                obj = Class.forName(className).newInstance();            }            if (obj instanceof Component) {                add((Component) obj);            }            if (obj instanceof Surface) {                //add("South", tools = new Tools(surface = (Surface) obj));                surface = (Surface) obj;            }            /*  if (obj instanceof CustomControlsContext) {                  ccc = (CustomControlsContext) obj;                  Component cmps[] = ccc.getControls();                  String cons[] = ccc.getConstraints();                  for (int i = 0; i < cmps.length; i++) {                      add(cmps[i], cons[i]);                  }              }*/        } catch (Exception e) {            e.printStackTrace();        }    }    public void start() {        //if (surface != null)        //  surface.startClock();        if (surface != null) {            surface.animating.start();        }    }    public void stop() {        if (surface != null) {            if (surface.animating != null) {                surface.animating.stop();            }            surface.bimg = null;        }    }    public void setDemoBorder(JPanel p) {        int top = (p.getComponentCount() + 1 >= 3) ? 0 : 5;        int left = ((p.getComponentCount() + 1) % 2) == 0 ? 0 : 5;        EmptyBorder eb = new EmptyBorder(top, left, 5, 5);        SoftBevelBorder sbb = new SoftBevelBorder(SoftBevelBorder.RAISED);        setBorder(new CompoundBorder(eb, sbb));    }}