Question

我正在使用gxt的LiveGrid。我想添加filters。我在下面添加了几行，但未过滤数据。我在这里错过任何东西吗？

GridFilters filters = new GridFilters(); 
filters.setLocal(true); 

StringFilter nameFilter = new StringFilter("column name"); 
filters.addFilter(nameFilter); 

filters.init(liveGrid);
liveGrid.addPlugin(filters);

Answer 1

来自filter javadoc：

要向Grid列添加过滤器，请创建Filter的具体子类的实例，将该值的ValueProvider传递给构造函数，然后将过滤器添加到GridFilters

您的代码示例似乎太复杂，应该可以参数化。 StringFilter应该为您希望过滤的模型对象的属性赋予ValueProvider。以下是如何使用过滤器创建网格的简单概述。

假设您有一个用户类

public class User implements Serializable {
    private String name;
    private Integer id;

    // Setters and getters
}

public interface UserProperties extends PropertyAccess<User> {
    @Path("id")
    ModelKeyProvider<User> key();

    ValueProvider<User, String> name();
}

要创建一个显示用户的网格，您可以按照以下操作

private static final UserProperties props = GWT.create(UserProperties.class);
...

// Create column config
ColumnConfig<User, String> nameCol = new ColumnConfig<User, String>(props.name(), 200, "Name");

// Create column model
List<ColumnConfig<User, ?>> l = new ArrayList<ColumnConfig<User, ?>>();
l.add(nameCol);
ColumnModel<User> cm = new ColumnModel<User>(l);

// Create User store
ListStore<User> store = new ListStore<User>(props.key());

// Create your grid
final LiveGridView<User> liveGridView = new LiveGridView<User>();
liveGridView.setForceFit(true);

Grid<User> view = new Grid<User>(store, cm) {
  @Override
  protected void onAfterFirstAttach() {
    super.onAfterFirstAttach();
    // Get grid data
  }
};

// Create a String filter for the column
StringFilter<User> nameFilter = new StringFilter<User>(props.name());

// Create a GridFilters
GridFilters<User> filters = new GridFilters<User>();
filters.initPlugin(grid);
filters.setLocal(true);
filters.addFilter(nameFilter);

Answer 2

GridFilters filters = new GridFilters（）; filters.setLocal（真）;

StringFilter nameFilter = new StringFilter（“column name”）; filters.addFilter（nameFilter）;

filters.init（liveGrid）; liveGrid.addPlugin（过滤器）;

如果你想在过滤器应用后得到数据你需要覆盖AbstractGridFilters的reload（）方法。

添加过滤器到LiveGrid？

2 个答案: