Java SWT：如何在每個Composite中使用多個布局？

Question

我有一個擴展Composite的類，我想要的是一個標題（在這種情況下為標簽），然后在一個單獨的行上包含三個控件，如下所示：

標題

[按鈕] TEXT [按鈕]

到目前為止，我已經在Button，text，button中添加了代碼，但是我不知道如何在這三個代碼的頂部添加標簽。

如何在頂部添加標題（標簽），然后在底部添加三個控件？

public class PageControl extends Composite {

    private Button nextPage;
    private Button previousPage;
    private Text text;
    private Label label;

    public PageControl(Composite parent, int style) {
        super(parent, style);
        GridLayout gridLayout = new GridLayout();
        gridLayout.numColumns = 3;
        gridLayout.makeColumnsEqualWidth = false;

        previousPage = new Button(this, style);
        previousPage.setText("Previous");
        previousPage.setLayoutData(new GridData(GridData.VERTICAL_ALIGN_CENTER));

        text = new Text(this, SWT.SINGLE | SWT.BORDER);
        GridData gridData = new GridData(GridData.VERTICAL_ALIGN_CENTER);

        GC gc = new GC(text);
        gridData.minimumWidth = gc.textExtent("123456890", 0).x;
        text.setTextLimit(10);
        text.setLayoutData(gridData);

        nextPage = new Button(this, style);
        nextPage.setText("Next");
        nextPage.setLayoutData(new GridData(GridData.VERTICAL_ALIGN_CENTER));

        Display display = Display.getCurrent();
        Color white = display.getSystemColor(SWT.COLOR_WHITE);
        this.setBackground(white);
        setLayout(gridLayout);
    }
}

Answer 1

只需使標簽跨越三列即可：

Label label = new Label(this, SWT.LEFT);
label.setText("title");

label.setLayoutData(new GridData(SWT.BEGINNING, SWT.CENTER, false, false, 3, 1));