ComboboxWithLoaderTest.java

ComboboxWithLoaderTest.java

import java.util.ArrayList;
import java.util.List;
 
import com.google.gwt.core.client.Callback;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.Widget;
import com.sencha.gxt.data.shared.LabelProvider;
import com.sencha.gxt.data.shared.ListStore;
import com.sencha.gxt.data.shared.ModelKeyProvider;
import com.sencha.gxt.data.shared.loader.DataProxy;
import com.sencha.gxt.data.shared.loader.ListLoadConfig;
import com.sencha.gxt.data.shared.loader.ListLoadResult;
import com.sencha.gxt.data.shared.loader.ListLoadResultBean;
import com.sencha.gxt.data.shared.loader.ListLoader;
import com.sencha.gxt.data.shared.loader.LoadResultListStoreBinding;
import com.sencha.gxt.widget.core.client.form.ComboBox;
 
public class ComboboxWithLoaderTest {
 
  private ComboBox<Company> combo;
 
  public ComboboxWithLoaderTest() {
    RootPanel.get().add(createComboboxWithLoaderTest());
  }
 
  public Widget createComboboxWithLoaderTest() {
    ListStore<Company> store = new ListStore<ComboboxWithLoaderTest.Company>(new ModelKeyProvider<Company>() {
      @Override
      public String getKey(Company item) {
        return item.getId();
      }
    });
 
    DataProxy<ListLoadConfig, ListLoadResult<Company>> proxy = new DataProxy<ListLoadConfig, ListLoadResult<Company>>() {
      @Override
      public void load(ListLoadConfig loadConfig, Callback<ListLoadResult<Company>, Throwable> callback) {
        final List<Company> companies = new ArrayList<Company>();
        for (int i = 0; i < 5; i++) {
          Company company = getCompany(i);
          companies.add(company);
        }
 
        ListLoadResult<Company> result = new ListLoadResultBean<Company>(companies);
        callback.onSuccess(result);
      }
    };
 
    final ListLoader<ListLoadConfig, ListLoadResult<Company>> loader = new ListLoader<ListLoadConfig, ListLoadResult<Company>>(
        proxy);
    loader.addLoadHandler(new LoadResultListStoreBinding<ListLoadConfig, Company, ListLoadResult<Company>>(store));
 
    LabelProvider<Company> labelProvider = new LabelProvider<Company>() {
      @Override
      public String getLabel(Company item) {
        return item.getName();
      }
    };
 
    combo = new ComboBox<Company>(store, labelProvider);
    // set the loader
    combo.setLoader(loader);
 
    // copied config
    combo.setName("callClassificationName");
    combo.setAllowBlank(false);
    combo.setEditable(true);
    combo.setAllowTextSelection(true);
    combo.setReadOnly(false);
    combo.setAllowBlank(false);
    combo.setForceSelection(false);
    combo.setTypeAhead(false);
 
    // optional
    combo.setLoadingText("Loading...");
 
    return combo;
  }
 
  private Company getCompany(int row) {
    String key = "key" + row;
    String name = "";
    if (row < 2) {
      name = "apple" + row;
    } else if (row > 2 && row < 5) {
      name = "oranges" + row;
    } else if (row > 5) {
      name = "candy" + row;
    } else {
      name = "fruit" + row;
    }
 
    Company company = new Company(key, name);
    return company;
  }
 
  public class Company {
    private String id;
    private String name;
 
    public Company(String id, String name) {
      this.id = id;
      this.name = name;
    }
 
    public String getId() {
      return id;
    }
 
    public String getName() {
      return name;
    }
 
    @Override
    public String toString() {
      String s = "";
      s += "id=" + id + ",";
      s += "name=" + name;
      return s;
    }
  }
 
}