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FormLayout Complex

import org.eclipse.swt.SWT; import org.eclipse.swt.layout.FormAttachment; import org.eclipse.swt.layout.FormData; import org.eclipse.swt.layout.FormLayout; 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.Shell; public class FormLayoutComplex {   public static void main(String[] args) {     Display display = new Display();     Shell shell = new Shell(display);     FormLayout layout = new FormLayout();     shell.setLayout(layout);     Button one = new Button(shell, SWT.PUSH);     one.setText("One");     FormData data = new FormData();     data.top = new FormAttachment(0, 5);     data.left = new FormAttachment(0, 5);     data.bottom = new FormAttachment(50, -5);     data.right = new FormAttachment(50, -5);     one.setLayoutData(data);     Composite composite = new Composite(shell, SWT.NONE);     GridLayout gridLayout = new GridLayout();     gridLayout.marginHeight = 20;     gridLayout.marginWidth = 20;     composite.setLayout(gridLayout);     Button two = new Button(composite, SWT.PUSH);     two.setText("two");     GridData gridData = new GridData(GridData.FILL_BOTH);     two.setLayoutData(gridData);     Button three = new Button(composite, SWT.PUSH);     three.setText("three");     gridData = new GridData(GridData.FILL_HORIZONTAL);     three.setLayoutData(gridData);     Button four = new Button(composite, SWT.PUSH);     four.setText("four");     gridData = new GridData(GridData.FILL_BOTH);     four.setLayoutData(gridData);     data = new FormData();     data.top = new FormAttachment(0, 15);     data.left = new FormAttachment(one, 25);     data.bottom = new FormAttachment(50, -15);     data.right = new FormAttachment(100, -25);     composite.setLayoutData(data);     Button five = new Button(shell, SWT.PUSH);     five.setText("five");     data = new FormData();     data.top = new FormAttachment(one, 5);     data.left = new FormAttachment(0, 5);     data.bottom = new FormAttachment(100, -5);     data.right = new FormAttachment(100, -5);     five.setLayoutData(data);     shell.pack();     shell.open();     while (!shell.isDisposed()) {       if (!display.readAndDispatch()) {         display.sleep();       }     }     display.dispose();   } }