Source Code : Create and dispose children of a composite

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Create and dispose children of a composite

/*
 * Composite example snippet: create and dispose children of a composite
 *
 * For a list of all SWT example snippets see
 * http://dev.eclipse.org/viewcvs/index.cgi/%7Echeckout%7E/platform-swt-home/dev.html#snippets
 */
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableItem;

public class Snippet98 {

  static int pageNum = 0;

  static Composite pageComposite;

  public static void main(String args[]) {
    Display display = new Display();
    final Shell shell = new Shell(display);
    shell.setLayout(new GridLayout());
    Button button = new Button(shell, SWT.PUSH);
    button.setText("Push");
    pageComposite = new Composite(shell, SWT.NONE);
    pageComposite.setLayout(new GridLayout());
    pageComposite.setLayoutData(new GridData());

    button.addListener(SWT.Selection, new Listener() {
      public void handleEvent(Event event) {
        if ((pageComposite != null) && (!pageComposite.isDisposed())) {
          pageComposite.dispose();
        }
        pageComposite = new Composite(shell, SWT.NONE);
        pageComposite.setLayout(new GridLayout());
        pageComposite.setLayoutData(new GridData());
        if (pageNum++ % 2 == 0) {
          Table table = new Table(pageComposite, SWT.BORDER);
          table.setLayoutData(new GridData());
          for (int i = 0; i < 5; i++) {
            new TableItem(table, SWT.NONE).setText("table item "
                + i);
          }
        } else {
          new Button(pageComposite, SWT.RADIO).setText("radio");
        }
        shell.layout(true);
      }
    });

    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch())
        display.sleep();
    }
    display.dispose();
  }
}


           
       

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