打开对话框时，SWT小部件不会显示在向导中

Question

我创建了一个向导，其中有一个页面和两个小部件：一个列表和一个按钮但是当使用CCD_ 1调用向导时，向导打开但不显示页面的小部件。我不知道怎么了！

这是页面的代码

public class SelectCriterionPage extends WizardPage  {
private Composite container;
ArrayList<String> listItems=new ArrayList<String>();
List variables,selected;
protected SelectCriterionPage() {
super("CriterionSelection","SelectCriterionPage",null);
setTitle("Selection of criterion variables");

}
@Override
public void createControl(Composite parent) {
container = new Composite(parent, SWT.NONE);
variables=new List(container, SWT.MULTI | SWT.BORDER | SWT.V_SCROLL);
//fill the list with variables
for(String item:listItems)
variables.add(item);
variables.addSelectionListener(new SelectionListener() {
@Override
public void widgetSelected(SelectionEvent e) {

}
@Override
public void widgetDefaultSelected(SelectionEvent e) {
        // TODO Auto-generated method stub
}
});
Button btn=new Button(container, SWT.PUSH);
btn.setText("<");
GridData gr=new GridData(GridData.FILL,SWT.CENTER);
btn.setLayoutData(gr);
setControl(container);
}
}

我打电话给我的向导

WizardDialog dialog = new WizardDialog(null, new       SelectSlicingCriterionWizard());
dialog.open();

这是我的向导：

public class SelectSlicingCriterionWizard extends Wizard{
IWorkbenchPage workbench;
IStructuredSelection selection;
ArrayList<String> listItems;
 public SelectSlicingCriterionWizard() {
        super();
        setNeedsProgressMonitor(true);
      }

@Override
public boolean performFinish() {
    System.out.println("Finish clicked");
    return true;
}
@Override
public boolean performCancel(){
    return true;
}
 @Override
  public void addPages() {
     SelectCriterionPage criterionpage=new SelectCriterionPage();
     addPage(criterionpage);
 }
 @Override
  public String getWindowTitle() {
    return "Select Criterion Variables";
}
public void init(IWorkbench workbench, IStructuredSelection selection)
{
this.workbench=workbench.getActiveWorkbenchWindow().getActivePage();
this.selection=selection;
}
}

Answer 1

您尚未为向导页面Composite设置布局。既然你似乎正在尝试使用网格，这应该是：

container = new Composite(parent, SWT.NONE);
container.setLayout(new GridLayout());

按钮的GridData使用了错误的构造函数（两个参数的构造函数设置了高度和宽度）。使用类似的东西

GridData gr = new GridData(SWT.BEGINNING, SWT.TOP, false, false);
btn.setLayoutData(gr);

Answer 2

您需要为您的Composite设置一个Layout。有关使用GridLayout的示例，请参阅-https://www.eclipse.org/swt/snippets/#gridlayout

有关在WizardPage中使用GridLayout的示例，请参阅-http://git.eclipse.org/c/platform/eclipse.platform.ui.git/tree/examples/org.eclipse.jface.snippets/Eclipse%20JFace%20Snippets/org/eclipse/jface/snippets/wizard/Snippet047WizardWithLongRunningOperation.java