java - 通过 ComboBox 填充 TwinColSelect

Question

我有以下麻烦。我有一个包含区列表的组合框，现在当组合框的值更改时，我还必须更改 TwinColSelect 左列的值，但右列必须保持不变。

我能怎么做？

Answer 1

My advice is to extends TwinColSelect and in there set the containerDataSource and setValue by yourself on

Example:

public class MyTwinColSelect
    extends TwinColSelect {

   public MyTwinColSelect(List<T> dataSource, List<T> value) {
      setContainerDataSource(new BeanItemContainer<T>(dataSource));
      setValue(value);
   }

   public updateDataSource(List<T> newDataSource) {
      setContainerDataSource(new BeanItemContainer<T>(newDataSource));
   }
}

And for ComboBox:

comboBox.addValueChangeListener(new ValueChangeListener() {

   private static final long serialVersionUID = 1L;

   @Override
   public void valueChange(ValueChangeEvent event) {
      twincolselect.updateDataSource(newDataSource);
   }
});