ScrolledComposite父级使用GridLayout

Question

我希望ScrolledComposite有一个父母有一个GridLayout但滚动条没有显示,除非我使用FillLayout.我的问题FillLayout是它的孩子占用了可用空间的相等部分.

在我的情况下,有两个小部件,顶部的一个小部件应该占不到窗口的1/4,并且ScrolledComposite应该占用剩余空间.但是,它们都占了一半.

有没有办法使用GridLayoutwith ScrolledComposite或是否可以修改行为FillLayout？

这是我的代码:

private void initContent() {

    //GridLayout shellLayout = new GridLayout();
    //shellLayout.numColumns = 1;
    //shellLayout.verticalSpacing = 10;
    //shell.setLayout(shellLayout);
    shell.setLayout(new FillLayout(SWT.VERTICAL));

    searchComposite = new SearchComposite(shell, SWT.NONE);
    searchComposite.getSearchButton().addListener(SWT.Selection, this);

    ScrolledComposite scroll = new ScrolledComposite(shell, SWT.V_SCROLL | SWT.H_SCROLL | SWT.BORDER);
    scroll.setLayout(new GridLayout(1, true));

    Composite scrollContent = new Composite(scroll, SWT.NONE);
    scrollContent.setLayout(new GridLayout(1, true));

    for (ChangeDescription description : getChanges(false)) {
        ChangesComposite cc = new ChangesComposite(scrollContent, description);
    }

    scroll.setMinSize(scrollContent.computeSize(SWT.DEFAULT, SWT.DEFAULT));
    scroll.setContent(scrollContent);
    scroll.setExpandVertical(true);
    scroll.setExpandHorizontal(true);
    scroll.setAlwaysShowScrollBars(true);

}

Answer 1

除了setLayout()之外，还需要调用setLayoutData()。在下面的代码示例中，看看如何GridData构造对象并将其传递给两个 setLayoutData() 调用中的每一个。

private void initContent(Shell shell)
{
    // Configure shell
    shell.setLayout(new GridLayout());

    // Configure standard composite
    Composite standardComposite = new Composite(shell, SWT.NONE);
    standardComposite.setLayoutData(new GridData(SWT.FILL, SWT.TOP, true, false));

    // Configure scrolled composite
    ScrolledComposite scrolledComposite = new ScrolledComposite(shell, SWT.V_SCROLL | SWT.H_SCROLL | SWT.BORDER);
    scrolledComposite.setLayout(new GridLayout());
    scrolledComposite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
    scrolledComposite.setExpandVertical(true);
    scrolledComposite.setExpandHorizontal(true);
    scrolledComposite.setAlwaysShowScrollBars(true);

    // Add content to scrolled composite
    Composite scrolledContent = new Composite(scrolledComposite, SWT.NONE);
    scrolledContent.setLayout(new GridLayout());
    scrolledComposite.setContent(scrolledContent);
}