Combo with Templates and Ajax (Ext GWT)
/*
* Ext GWT - Ext for GWT
* Copyright(c) 2007-2009, Ext JS, LLC.
* licensing@extjs.com
*
* http://extjs.com/license
*/
package com.google.gwt.sample.hello.client;
import java.util.Date;
import com.extjs.gxt.ui.client.data.BasePagingLoader;
import com.extjs.gxt.ui.client.data.DataField;
import com.extjs.gxt.ui.client.data.JsonPagingLoadResultReader;
import com.extjs.gxt.ui.client.data.LoadEvent;
import com.extjs.gxt.ui.client.data.Loader;
import com.extjs.gxt.ui.client.data.ModelData;
import com.extjs.gxt.ui.client.data.ModelType;
import com.extjs.gxt.ui.client.data.PagingLoadResult;
import com.extjs.gxt.ui.client.data.PagingLoader;
import com.extjs.gxt.ui.client.data.ScriptTagProxy;
import com.extjs.gxt.ui.client.event.Listener;
import com.extjs.gxt.ui.client.store.ListStore;
import com.extjs.gxt.ui.client.widget.LayoutContainer;
import com.extjs.gxt.ui.client.widget.VerticalPanel;
import com.extjs.gxt.ui.client.widget.form.ComboBox;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.user.client.Element;
import com.google.gwt.user.client.ui.RootPanel;
public class Hello implements EntryPoint {
public void onModuleLoad() {
RootPanel.get().add(new AdvancedComboBoxExample());
}
}
class AdvancedComboBoxExample extends LayoutContainer {
@Override
protected void onRender(Element parent, int index) {
super.onRender(parent, index);
String url = "http://www.extjs.com/forum/topics-remote.php";
ScriptTagProxy<PagingLoadResult<ModelData>> proxy = new ScriptTagProxy<PagingLoadResult<ModelData>>(url);
ModelType type = new ModelType();
type.setRoot("topics");
type.setTotalName("totalCount");
type.addField("title", "topic_title");
type.addField("topicId", "topic_id");
type.addField("author", "author");
type.addField("excerpt", "post_text");
DataField date = new DataField("lastPost", "post_time");
date.setType(Date.class);
date.setFormat("timestamp");
type.addField(date);
JsonPagingLoadResultReader<PagingLoadResult<ModelData>> reader = new JsonPagingLoadResultReader<PagingLoadResult<ModelData>>(
type);
PagingLoader<PagingLoadResult<ModelData>> loader = new BasePagingLoader<PagingLoadResult<ModelData>>(proxy, reader);
loader.addListener(Loader.BeforeLoad, new Listener<LoadEvent>() {
public void handleEvent(LoadEvent be) {
be.<ModelData> getConfig().set("start", be.<ModelData> getConfig().get("offset"));
}
});
ListStore<ModelData> store = new ListStore<ModelData>(loader);
ComboBox<ModelData> combo = new ComboBox<ModelData>();
combo.setWidth(580);
combo.setDisplayField("title");
combo.setItemSelector("div.search-item");
combo.setTemplate(getTemplate());
combo.setStore(store);
combo.setHideTrigger(true);
combo.setPageSize(10);
VerticalPanel vp = new VerticalPanel();
vp.setSpacing(10);
vp.addText("<span class='text'><b>Combo with Templates and Ajax</b><br>This is a more advanced example that shows how you can combine paging, XTemplate and a remote data store to create a 'live search' feature.</span>");
vp.add(combo);
add(vp);
}
private native String getTemplate() /*-{
return [
'<tpl for="."><div class="search-item">',
'<h3><span>{lastPost:date("MM/dd/y")}<br />by {author}</span>{title}</h3>',
'{excerpt}',
'</div></tpl>'
].join("");
}-*/;
}
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