Question

我想以编程方式为ComboViewer设置一个值。我试图从对象中获取值并使用setSelection（Iselection）以这种方式设置viewer.setSelection（新的StructuredSelection（Object），但是值不会在ComboViewer Selection上更新。可以任何一个帮助我如何以编程方式设置ComboViewer的选择？

Answer 1

我最近这样做了。如果组合中设置的值和您设置的值匹配，则需要关注。尝试打印或单步执行。

这是需要做的事情 -

// set up comboViewer
comboViewer = new ComboViewer(leftSectionComposite, SWT.READ_ONLY);
comboViewer.setContentProvider(new ArrayContentProvider());
comboViewer.setLabelProvider(new LabelProvider()); // Use your label provider if possible.
comboViewer.setInput(YOURVALUES);

// set value

final ISelection selection = new StructuredSelection(valueFromComboThatYouWantToSet);
comboViewer.setSelection(selection);

Answer 2

// set up comboViewer
comboViewer = new ComboViewer(leftSectionComposite, SWT.READ_ONLY);
comboViewer.setContentProvider(new ArrayContentProvider().getInstance());
comboViewer.setLabelProvider(new LabelProvider() {
            @Override
            public String getText(Object element) {
                if (element instanceof OwnerClass)

                              return ((OwnerClass)element).getName();
             return super.getText(element);
            }
        });); 

comboViewer.setInput(getService().getOwnerClass());


Person p = (Person)selection.getFirstElement();
final ISelection selection = new StructuredSelection(p.getOwnerClassObj().getName());

comboViewer.setSelection(selection);

Answer 3

public enum CarType {
    SUV, MPV, Hatchback, Sedan;
}

// ...
cv = new ComboViewer(aComposite);
cv.setContentProvider(ArrayContentProvider.getInstance());
cv.setInput(CarType.values());

//THE BELOW LINE HAVE WHAT YOU WANT
final ISelection defaultValue = new StructuredSelection(CarType.Sedan);
cv.setSelection(defaultValue);

如何以编程方式在comboviewer中设置所需的选择

3 个答案: