pack: Specifies whether all controls should take their preferred size : RowLayout « SWT « Java Tutorial

1. Java Tutorial
2. SWT
3. RowLayout

If pack is set to true, all controls have the same size, which is the size required to accommodate the largest preferred height and the largest preferred width of all the controls. The default value is true.

import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.List;
import org.eclipse.swt.widgets.Shell;

public class RowlLayoutPack {
  public static void main(String[] args) {
    Display display = new Display();
    final Shell shell = new Shell(display);

    RowLayout rowLayout = new RowLayout();
    rowLayout.pack = false;
    
    shell.setLayout(rowLayout);

    Button button1 = new Button(shell, SWT.PUSH);
    button1.setText("button1");

    List list = new List(shell, SWT.BORDER);
    list.add("item 1");
    list.add("item 2");
    list.add("item 3");

    Button button2 = new Button(shell, SWT.PUSH);
    button2.setText("button #2");

    
    shell.setSize(450, 100);
    shell.open();

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

17.99.RowLayout
	17.99.1.	Using RowLayout
	17.99.2.	Using all default value from RowLayout
	17.99.3.	RowLayout: align widgets in a row
	17.99.4.	RowLayout snippet: align widgets in a column
	17.99.5.	RowLayout: fill
	17.99.6.	RowLayout: justify
	17.99.7.	RowLayout: marginLeft, marginRight, marginTop, marginBottom
	17.99.8.	pack: Specifies whether all controls should take their preferred size
	17.99.9.	RowLayout: spacing
	17.99.10.	RowLayout: type
	17.99.11.	RowLayout: wrap
	17.99.12.	Using RowData Objects