水平線顯示不正確的SWT標籤

Question

我試圖在2列的GridLayout中顯示標籤。我似乎無法使其顯示文本和下面的水平線：

public void foo(){ 
    popupShell = new Shell(Display.getDefault(), SWT.NO_TRIM | SWT.ON_TOP | SWT.MODELESS); 
    //popupShell.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); 
    popupShell.setLayout(createNoMarginLayout(2, false)); 

    Label history = new Label(popupShell, SWT.SEPARATOR | SWT.SHADOW_OUT | SWT.HORIZONTAL); 
    history.setText("History"); 
    history.setVisible(true); 
    Label fill = new Label(popupShell, SWT.NONE); 
    fill.setSize(0,30); 
} 

public static GridLayout createNoMarginLayout(int numColumns, boolean makeColumnsEqualWidth) { 
    GridLayout layout = new GridLayout(numColumns, makeColumnsEqualWidth); 
    layout.verticalSpacing   = 0; 
    layout.horizontalSpacing = 0; 
    layout.marginTop   = 0; 
    layout.marginBottom    = 0; 

    layout.marginLeft    = 0; 
    layout.marginRight    = 0; 
    layout.marginWidth    = 0; 
    layout.marginHeight    = 0; 
    return layout; 
} 

我得到的只是沒有文字的行。

我在做什麼錯？

Answer 1

A Label與SWT.SEPARATOR樣式不顯示任何文本值。您必須使用單獨的控件來顯示文本。

從Label源，顯示出setText完全忽略SWT.SEPARATOR：

public void setText (String string) { 
    checkWidget(); 
    if (string == null) error (SWT.ERROR_NULL_ARGUMENT); 

    if ((style & SWT.SEPARATOR) != 0) return; 

    ...