Source Code : Insert widgets into a grid layout

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Insert widgets into a grid layout

/*
 * GridLayout example snippet: insert widgets into a grid layout
 *
 * 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.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;

public class Snippet6 {

  public static void main(String[] args) {
    Display display = new Display();
    final Shell shell = new Shell(display);
    shell.setLayout(new GridLayout());
    final Composite c = new Composite(shell, SWT.NONE);
    GridLayout layout = new GridLayout();
    layout.numColumns = 3;
    c.setLayout(layout);
    for (int i = 0; i < 10; i++) {
      Button b = new Button(c, SWT.PUSH);
      b.setText("Button " + i);
    }

    Button b = new Button(shell, SWT.PUSH);
    b.setText("add a new button at row 2 column 1");
    final int[] index = new int[1];
    b.addListener(SWT.Selection, new Listener() {
      public void handleEvent(Event e) {
        Button s = new Button(c, SWT.PUSH);
        s.setText("Special " + index[0]);
        index[0]++;
        Control[] children = c.getChildren();
        s.moveAbove(children[3]);
        shell.layout(new Control[] { s });
      }
    });

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

}

           
       

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