无论如何都要让组合框的自动完成从文本的任何地方开始，让我举个例子。如果我在组合框中有一个名叫约翰·史密斯的人，如果我从字母“j”开始，它会拉起约翰·史密斯，但更少说我想从字母's'开始搜索他的姓，那是否可能，如果是这样的话有没有人有代码或链接到代码执行此操作。
答案 0 :(得分：12)
你看过SuggestBox了吗？将数据提供给建议框的MultiWordSuggestOracle似乎完全符合您的要求 - 请参阅javadocs了解用法和示例。
更新：这是一个很好的例子，可以自定义GWT SuggestBox看起来像Facebook上的那个：http://raibledesigns.com/rd/entry/creating_a_facebook_style_autocomplete请务必遵循该教程中的所有链接，如它们包含大量有关使用SuggestBox。
答案 1 :(得分：3)
我对AdvancedComboBoxExample sencha有任何问题 http://www.sencha.com/examples/#ExamplePlace:advancedcombobox
我在此链接http://www.sencha.com/forum/showthread.php?222543-CRTL-C-triggers-a-reload-of-data-in-Combobox中找到了对我的问题的回复。
我必须对我的代码进行一些调整。以下是需要它的人的代码。
没有分页的ComboBox ajax：
import com.extjs.gxt.ui.client.data.*;
import com.extjs.gxt.ui.client.store.ListStore;
import com.extjs.gxt.ui.client.widget.form.ComboBox;
import com.google.gwt.user.client.rpc.AsyncCallback;
import java.util.List;
import java.util.Map;
public class AjaxComboBox<T extends ModelData> extends ComboBox<T> {
public AjaxComboBox() {
}
public interface GetDataCallback<T> {
void getData(String query, AsyncCallback<List<T>> dataCallback);
}
public AjaxComboBox(final String displayField, final int minChars, final GetDataCallback<T> getDataCallback) {
final RpcProxy<ListLoadResult<T>> proxy = new RpcProxy<ListLoadResult<T>>() {
@Override
protected void load(final Object loadConfig, final AsyncCallback<ListLoadResult<T>> callback) {
ListLoadConfig load = (ListLoadConfig) loadConfig;
final Map<String, Object> properties = load.getProperties();
getDataCallback.getData((String) properties.get("query"), new AsyncCallback<List<T>>() {
public void onFailure(Throwable caught) {
caught.printStackTrace();
}
public void onSuccess(List<T> result) {
callback.onSuccess(new BaseListLoadResult<T>(result));
}
});
}
};
final BaseListLoader<ListLoadResult<T>> loader = new BaseListLoader<ListLoadResult<T>>(proxy);
final ListStore<T> store = new ListStore<T>(loader);
setFieldLabel(displayField);
setStore(store);
setHideTrigger(true);
setMinChars(minChars);
setWidth(300);
}
}
ComboBox懒惰与分页
import com.extjs.gxt.ui.client.data.*;
import com.extjs.gxt.ui.client.event.Listener;
import com.extjs.gxt.ui.client.store.ListStore;
import com.extjs.gxt.ui.client.widget.form.ComboBox;
import com.google.gwt.user.client.rpc.AsyncCallback;
import java.util.Map;
public class ComboBoxLazy<T extends ModelData> extends ComboBox<T> {
public interface GetPagingDataCallback<T> {
void getData(String query, PagingLoadConfig loadConfig,
AsyncCallback<PagingLoadResult<T>> dataCallback);
}
public ComboBoxLazy(final String displayField, final int minChars,
final GetPagingDataCallback<T> getDataCallback) {
final RpcProxy<PagingLoadResult<T>> proxy = new RpcProxy<PagingLoadResult<T>>() {
@Override
protected void load(Object loadConfig,
final AsyncCallback<PagingLoadResult<T>> callback) {
final Map<String, Object> properties = ((PagingLoadConfig) loadConfig).getProperties();
getDataCallback.getData((String) properties.get("query"),
((PagingLoadConfig) loadConfig),
new AsyncCallback<PagingLoadResult<T>>() {
@Override
public void onSuccess(
final PagingLoadResult<T> result) {
callback.onSuccess(result);
}
@Override
public void onFailure(Throwable caught) {
callback.onFailure(caught);
}
});
}
};
ModelReader reader = new ModelReader();
final BasePagingLoader<PagingLoadResult<T>> loader = new BasePagingLoader<PagingLoadResult<T>>(
proxy, reader);
loader.addListener(Loader.BeforeLoad, new Listener<LoadEvent>() {
public void handleEvent(LoadEvent be) {
be.<ModelData>getConfig().set("start",
be.<ModelData>getConfig().get("offset"));
}
});
setFieldLabel(displayField);
final ListStore<T> store = new ListStore<T>(loader);
setStore(store);
setHideTrigger(true);
setMinChars(minChars);
setPageSize(10);
setWidth(300);
}
}
班级考试
import br.ueg.escala.client.view.ConversorBeanModel;
import com.extjs.gxt.ui.client.data.*;
import com.extjs.gxt.ui.client.event.SelectionChangedEvent;
import com.extjs.gxt.ui.client.event.SelectionChangedListener;
import com.extjs.gxt.ui.client.widget.LayoutContainer;
import com.extjs.gxt.ui.client.widget.VerticalPanel;
import com.google.gwt.user.client.Element;
import com.google.gwt.user.client.rpc.AsyncCallback;
import java.util.List;
public class ComboBoxTest extends LayoutContainer {
@Override
protected void onRender(Element parent, int index) {
super.onRender(parent, index);
criarComboBox();
criarComboBoxLazy();
}
private void criarComboBox() {
final AjaxComboBox<BeanModel> combo = new AjaxComboBox<BeanModel>("name", 3, new AjaxComboBox.GetDataCallback<BeanModel>() {
public void getData(String query, final AsyncCallback<List<BeanModel>> dataCallback) {
servico.loadLike(query, new AsyncCallback<List<Person>>() {
public void onFailure(Throwable caught) {
caught.printStackTrace();
}
public void onSuccess(List<Person> result) {
List<BeanModel> dados = ConversorBeanModel.getListBeanModel(result);
dataCallback.onSuccess(dados);
}
});
}
});
combo.addSelectionChangedListener(new SelectionChangedListener<BeanModel>() {
@Override
public void selectionChanged(SelectionChangedEvent<BeanModel> se) {
BeanModel bm = combo.getView().getSelectionModel().getSelectedItem();
Person p = bm.getBean();
combo.setValue(bm);
try {
combo.setValue(bm);
combo.setRawValue(p.getName());
} catch (Exception e) {
e.printStackTrace();
}
}
});
combo.setItemSelector("div.search-item");
combo.setTemplate(getTemplate());
addText("Any text");
add(combo);
}
private void criarComboBoxLazy() {
String field = "name";
final ComboBoxLazy<BeanModel> comboLazy = new ComboBoxLazy<BeanModel>(field, 3, new ComboBoxLazy.GetPagingDataCallback<BeanModel>() {
public void getData(String query, PagingLoadConfig loadConfig, final AsyncCallback<PagingLoadResult<BeanModel>> dataCallback) {
final PagingLoadConfig load = (PagingLoadConfig) loadConfig;
servico.loadLike(load, new Person(), "name", query, new AsyncCallback<List>() {
public void onFailure(Throwable caught) {
caught.printStackTrace();
}
public void onSuccess(List result) {
PagingLoadResult<BeanModel> dados = ConversorBeanModel.getPagingLoadResultBeanModel(result, load);
dataCallback.onSuccess(dados);
}
});
}
});
comboLazy.addSelectionChangedListener(new SelectionChangedListener<BeanModel>() {
@Override
public void selectionChanged(SelectionChangedEvent<BeanModel> se) {
BeanModel bm = comboLazy.getView().getSelectionModel().getSelectedItem();
Person p = bm.getBean();
comboLazy.setValue(bm);
try {
comboLazy.setValue(bm);
comboLazy.setRawValue(p.getName());
} catch (Exception e) {
e.printStackTrace();
}
}
});
comboLazy.setItemSelector("div.search-item");
comboLazy.setTemplate(getTemplate());
VerticalPanel vp2 = new VerticalPanel();
vp2.setSpacing(10);
vp2.addText("<span class='text'><b>Combo lazy</span>");
vp2.add(comboLazy);
add(vp2);
}
private native String getTemplate() /*-{
return [ '<tpl for="."><div class="search-item">',
' <h3> <span> Name:</span> <span style="font-weight:normal;">{name}</span> ',
' <span> - Last name:</span> <span style="font-weight: normal">{lastName}</span></h3>', '</div></tpl>'].join("");
}-*/;
}
Application.css：
.searchItem {
font: normal 11px tahoma, arial, helvetica, sans-serif;
padding: 3px 10px 3px 10px;
white-space: normal;
color: #555;
}
.searchItem h3 {
display: block;
font: inherit;
font-weight: bold;
color: #222;
}
.searchItem h3 span {
float: right;
font-weight: normal;
margin: 0 0 5px 5px;
width: 100px;
display: block;
clear: none;
}
代码服务器
public List loadLike(PagingLoadConfig config, Person classe, String field, String query) {
List<Person> list = null;
try {
List listEntity = genericoBC.loadLike(config.getOffset(), config.getLimit(), field, query, classe.getClass());
list = clone(listEntity);
final int totalCount = genericoBC.contarRegistros(classe.getClass());
config.setLimit(totalCount);
} catch (Exception e) {
tratarExcecao("", e);
}
return list;
}
public List<Person> loadLike(String query) {
List<Person> list = null;
try {
List<Person> listEntity = genericoBC.loadLike(query);
list = clone(listEntity);
} catch (Exception e) {
tratarExcecao("Error:genericoBC.loadLike(query)", e);
}
return list;
}
答案 2 :(得分：2)
覆盖组合框的 ListStore 的方法 boolean isFiltered（ModelData record，String property）。方法体将如下：
if (filterBeginsWith != null && property != null) {
Object o = record.get(property);
if (o != null) {
if (!o.toString().toLowerCase().contains(filterBeginsWith.toLowerCase())) {
return true;
}
}
}
if (filters != null) {
for (StoreFilter filter : filters) {
boolean result = filter.select(this, record, record, property);
if (!result) {
return true;
}
}
}
return false;
答案 3 :(得分：0)
这适用于GXT 3.0。
首先，创建一个被覆盖的ListStore类的实例，如下所示：
public static class MyListStore extends ListStore<Course>{
private String userText="";
public MyListStore(ModelKeyProvider<Course> k){
super(k);
}
@Override
protected boolean isFilteredOut(Course item) {
boolean result = false;
if(item.getTitle()!=null &&
!item.getTitle().toUpperCase().contains(userText.toUpperCase())){
result = true;
}
return result;
}
public void setUserText(String t){ userText = t; }
}
在这种情况下，我有一个课程模型类，其中包含课程标题（一个字符串）作为组合框的标签提供者。因此，在您重写的类中，执行类似的操作：使用您的特定模型（此组合框实例的类型）代替上面代码中的“课程”。
接下来，创建此商店的实例以供组合框使用：
private MyListStore courses ;
接下来，请确保使用此方法适当地初始化组合框。在我的情况下，我使用uibinder，所以我的初始化程序是这样的：
@UiFactory
ListStore<Course> createListStore() {
courses = new MyListStore(courseProps.key());
return courses;
}
相关的uibinder片段：
<ui:with type="com.sencha.gxt.data.shared.LabelProvider" field="titles"/>
<ui:with type="com.sencha.gxt.data.shared.ListStore" field="courses"/>
...
<form:ComboBox ui:field="classTitle" store="{courses}" labelProvider="{titles}"
allowBlank="false" forceSelection="true" triggerAction="ALL" width="200" />
当然，链接到绑定的java类：
@UiField ComboBox<Course> classTitle;
最后，确保从组合框输入中处理keyup事件：
classTitle.addKeyUpHandler(new KeyUpHandler(){
@Override
public void onKeyUp(KeyUpEvent event) {
courses.setUserText(classTitle.getText());
}
});
这完美（第一次！）。