GWT列表框多选 [英] GWT Listbox Multi Select

问题描述

我需要添加一个允许用户选择多个值的listbox / combobox。

我知道GWT API中已经有一个
ListBox 。但我没有得到任何直接的方式从列表框中获取所有选定的reocrds。

有些谷歌教程是sugeesting实现 ChangeHandler 的 onChange 方法。

我认为应该有其他方法。 b
$ b

任何指针都会被赞赏。

解决方案

创建您自己的小型子类<$ c

  public LinkedList< Integer> $ c> ListBox  getSelectedItems（）{
 LinkedList< Integer> selectedItems = new LinkedList< Integer>（）; 
 for（int i = 0; i< getItemCount（）; i ++）{
 if（isItemSelected（i））{
 selectedItems.add（i）; 
} 
} 
返回selectedItems; 
} 
  

GWT API不提供直接的方法。

I need to add a listbox / combobox which allows the user to choose several values.

I know there is one already available in the GWT API ListBox with isMultipleSelect() set to true. But I am not getting any direct way to get all selected reocrds from list box.

Some tutorials on google are sugeesting implement ChangeHandler's onChangemethod.

I think there should be some other way.

Any pointers would be appreciated.

解决方案

Create your own small subclass of ListBox offering a method like

public LinkedList<Integer> getSelectedItems() {
    LinkedList<Integer> selectedItems = new LinkedList<Integer>();
    for (int i = 0; i < getItemCount(); i++) {
        if (isItemSelected(i)) {
            selectedItems.add(i);
        }
    }
    return selectedItems;
}

The GWT API does not offer a direct way.

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