如何在 Uibinder .ui.xml 模板中向 GWT ListBox 添加项目? [英] How do I add items to GWT ListBox in Uibinder .ui.xml template ?

问题描述

如何使用 UiBinder 添加列表框项目?

How to add the listbox items using UiBinder?

推荐答案

这是一个枚举翻译的列表框，我想这也适用于带有字符串值的列表框(GWT 版本:2.1.0)

This is a listbox of translations of an enumeration, I suppose this also works for a listbox with string values (version of GWT: 2.1.0)

您只需要渲染器来翻译枚举值.

You only need the renderer for translating the enumeration values.

//UI XML

 <g:ValueListBox ui:field="requesterType"/> 

//Java代码

 @UiField(provided = true)
 ValueListBox<RequesterType> requesterType = new ValueListBox<RequesterType>(requesterTypeRenderer);

 static EnumRenderer<RequesterType> requesterTypeRenderer = new EnumRenderer<RequesterType>();

 public Constructor() {
     requesterTypeRenderer.setEmptyValue(Translations.translateEmptyValue(RequesterType.class));
     requesterType.setAcceptableValues(Arrays.asList(EnumUtil.getRequesterTypes()));
 }

<小时>

 /**
  * Translates enum entries. Use setEmptyValue() if you want to have a custom empty value. Default empty value is "".
  * 
  * @param <T>
  *            an enumeration entry which is to be registered in {@link Translations}
  */

public class EnumRenderer<T extends Enum<?>> extends AbstractRenderer<T> {

   private String emptyValue = "";

   @Override
   public String render(T object) {
       if (object == null)
           return emptyValue;
       return Translations.translate(object);
   }

   public void setEmptyValue(String emptyValue) {
       this.emptyValue = emptyValue;
   }

}

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