我想要一个ScrolledComposite,其父网格有GridLayout,但滚动条没有显示,除非我使用FillLayout.我对FillLayout的问题是它的子节点占用了可用空间的相等部分.
在我的例子中有两个小部件,顶部的小部件不应超过窗口的1/4,ScrolledComposite应占用剩余空间.但是,它们都占了一半.
有没有办法将GridLayout与ScrolledComposite一起使用,还是可以修改FillLayout的行为？
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);
}
解决方法
除了setLayout()之外,还需要调用setLayoutData().在下面的代码示例中,看看如何构造GridData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));
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);
}
