Java programming in SWT

Question

HI.. i have this piece of code in java...

import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.CTabFolder;
import org.eclipse.swt.custom.CTabItem;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.layout.RowLayout;
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.Shell;
import org.eclipse.swt.widgets.Text;


public class testTabs {
    static int count;
    public static void main (String [] args) {
     Display display = new Display ();
     final Shell shell = new Shell(display);
     shell.setLayout(new FillLayout());
     shell.setText("SWT TabFolder Example");


     CTabFolder folder = new CTabFolder(shell,SWT.NONE);
     CTabItem item = new CTabItem(folder,SWT.UP);
     item.setText("First");


     CTabItem item1 = new CTabItem(folder,SWT.UP);
     item1.setText("First new");

//---------------------------------------------------   

     CTabFolder fold = new CTabFolder(folder,SWT.UP);
     CTabItem ite = new CTabItem(fold,SWT.UP);
     ite.setText("Second");
     final Composite test = new Composite(fold,SWT.NONE);
     test.setLayout(new RowLayout());
     Text tab1 = new Text(test,SWT.NONE);
     tab1.setText("Testing");
     tab1.setEditable(true);
     ite.setControl(test);
     item.setControl(fold);

     Button add = new Button(test,SWT.PUSH);
     add.setText("ADD");
     SelectionAdapter adap = new SelectionAdapter(){
      public void widgetSelected(SelectionEvent e){
       Composite newcomp = new Composite(test,SWT.BORDER_DASH);
       Text testtext = new Text(newcomp,SWT.BORDER_SOLID);
       testtext.setText("Inside new Comp");
       count++;
       System.out.println(count);
       Control array[] = shell.getChildren();
       System.out.println(array.length);
       shell.pack();
      }
     };

     add.addSelectionListener(adap);
     shell.open();
     while(!shell.isDisposed()){
      if(!display.readAndDispatch()){
       display.sleep();
      }
     }

    }
}

When i run this, the composite "newcomp" is not visible.. can anyone help me??

Answer 1

If I modify your code to just add a layout, then it works:

public void widgetSelected(SelectionEvent e) {
    Composite newcomp = new Composite(test,SWT.BORDER_DASH);
    newcomp.setLayout(new RowLayout());
    ....

Answer 2

Try using test.layout() by the end of your widgetSelected method.

Let us know if it worked.