如何动态地将swt小部件添加到组合中？

如何动态地将swt小部件添加到组合中？

解决该问题的方法是设置

ScrolledComposite

每次添加/删除窗口小部件的最小大小。您将从中使用

setMinSize(Point)

API

ScrolledComposite

。另外，请记住

layout()

滚动复合内容，而不是其子元素。放置孩子将自动完成。

当前， 添加 按钮与每个新添加的组件一起移动。如果您希望它不移动，只需将其移动到滚动的复合内容之外。

另外，我还整理了一下代码，希望您不要介意。:-)

public class DynamicDialog extends Dialog {    private int count = 1;    public DynamicDialog(final Shell parent)     {        super(parent);    }    @Override    protected Control createDialogArea(final Composite parent)     {        final Composite container = (Composite) super.createDialogArea(parent);        container.setLayout(new FillLayout());        final ScrolledComposite scrolledComposite = new ScrolledComposite(container, SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL);        scrolledComposite.setExpandHorizontal(true);        scrolledComposite.setExpandVertical(true);        final Composite composite = new Composite(scrolledComposite, SWT.NONE);        composite.setLayout(new GridLayout(1, false));        scrolledComposite.setContent(composite);        scrolledComposite.setSize(composite.computeSize(SWT.DEFAULT, SWT.DEFAULT));        final Composite composite_1 = new Composite(composite, SWT.NONE);        composite_1.setLayout(new GridLayout(2, false));        composite_1.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false));        final Label lblDefault = new Label(composite_1, SWT.NONE);        lblDefault.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, false, false, 1, 1));        lblDefault.setText("Default:");        final Combo combo = new Combo(composite_1, SWT.NONE);        combo.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, true, false, 1, 1));        final Composite composite_2 = new Composite(composite, SWT.NONE);        composite_2.setLayout(new GridLayout(4, false));        composite_2.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false));        final Composite composite_3 = new Composite(composite, SWT.NONE);        composite_3.setLayout(new GridLayout());        composite_3.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false));        final Button btnAdd = new Button(composite_3, SWT.NONE);        btnAdd.setText("Add");        btnAdd.addSelectionListener(new SelectionAdapter()         { @Override public void widgetSelected(final SelectionEvent e)  {     final Label label2 = new Label(composite_2, SWT.NONE);     label2.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, false, false, 1, 1));     label2.setText( String.valueOf(count++) );     new Text(composite_2, SWT.BORDER).setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));     new Text(composite_2, SWT.BORDER).setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));     new Button(composite_2, SWT.NONE).setText("Delete");     // DO THIS:     scrolledComposite.layout(true, true);     scrolledComposite.setMinSize(composite.computeSize(SWT.DEFAULT, SWT.DEFAULT));     // .. and it will work }        });        return container;    }    @Override    protected void createButtonsForButtonBar(final Composite parent)     {        createButton(parent, IDialogConstants.OK_ID, IDialogConstants.OK_LABEL, true);        createButton(parent, IDialogConstants.CANCEL_ID, IDialogConstants.CANCEL_LABEL, false);    }        @Override    protected Point getInitialSize()     {        return new Point(450, 300);    }    public static void main(final String[] args)    {        final Shell shell = new Shell(new Display());        shell.setLayout(new FillLayout());        new DynamicDialog(shell).open();    }}