多列

与上面的单列示例类似，如果我们改为使用 GridLayout(int, boolean) 构造函数，我们可以创建一个包含多列的布局。

在这种情况下，我们创建两列，每列都具有相同的宽度。

public class MultiColumnGridLayoutExample {

    private final Display display;
    private final Shell shell;

    public MultiColumnGridLayoutExample() {
        display = new Display();
        shell = new Shell(display);

        // Create the layout and apply to the Shell
        shell.setLayout(new GridLayout(2, true));

        // Add the child controls to the Shell - in this case, in two columns
        final Button buttonA = new Button(shell, SWT.PUSH);
        buttonA.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
        buttonA.setText("Button A");
        
        final Button buttonB = new Button(shell, SWT.PUSH);
        buttonB.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
        buttonB.setText("Button B");
        
        final Button buttonC = new Button(shell, SWT.PUSH);
        buttonC.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
        buttonC.setText("Button C");
        
        final Button buttonD = new Button(shell, SWT.PUSH);
        buttonD.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
        buttonD.setText("Button D");
    }

    public void run() {
        shell.pack();
        shell.open();

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

    public static void main(final String... args) {
        new MultiColumnGridLayoutExample().run();
    }

}

结果是：