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index.zulzul<zk>
<div apply="pkg$.ComboboxAutocompleteComposer">
<combobox id="myCb"/>
</div>
</zk>ComboboxAutocompleteComposer.javajava
import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;
import org.zkoss.zk.ui.Component;
import org.zkoss.zk.ui.event.SelectEvent;
import org.zkoss.zk.ui.select.SelectorComposer;
import org.zkoss.zk.ui.select.annotation.Listen;
import org.zkoss.zk.ui.select.annotation.Wire;
import org.zkoss.zk.ui.util.Clients;
import org.zkoss.zul.Combobox;
import org.zkoss.zul.Comboitem;
import org.zkoss.zul.ComboitemRenderer;
import org.zkoss.zul.ListModel;
import org.zkoss.zul.ListModelList;
import org.zkoss.zul.ListModels;
public class ComboboxAutocompleteComposer extends SelectorComposer<Component> {
//Wire the component by it's ID to access it in the composer, more info in ZK MVC documentation
@Wire
private Combobox myCb;
//List of my Data, from anywhere
private List<MyEntityBean> myModel = new ArrayList();
//Implementation of submodel (auto filtered model) to use in combobox
private ListModel mySubModel;
// This method is called after composing the page, and is suitable to intialize values and additional components
@Override
public void doAfterCompose(Component comp) throws Exception {
//call super (required, or the page will not finish composition)
super.doAfterCompose(comp);
//generate some data
for (int i = 0; i < 50; i++) {
for (int j = 0; j < 5; j++) {
myModel.add(new MyEntityBean(i+"-"+j+"-id", i+"-"+j+"-data"));
}
}
//Comparator have many uses. Here, the comparator will return 0 is the item match the input string and should be included in the result)
Comparator myComparator = new Comparator() {
@Override
public int compare(Object o1, Object o2) {
// the value of the combobox input
String input = (String) o1;
// the bean from the model
MyEntityBean bean = (MyEntityBean) o2;
return bean.getData().contains(input)?0:1;
}
};
//Generate a ListModel from the flat data, then a subModel from the listmodel
//Comparator is used when filtering to identify which bean should be included in the result
//This subModel will return the top 15 results from when filtering. Anything further will be ignored. You can implement your own submodel to have control over this process.
mySubModel = ListModels.toListSubModel(new ListModelList(myModel),myComparator,15);
myCb.setModel(mySubModel);
//Renderer will be called when creating the comboitem (each line in combobox) from the bean. You can implement your own renderer to control what is displayed
ComboitemRenderer<MyEntityBean> myRenderer = new ComboitemRenderer<MyEntityBean>() {
@Override
public void render(Comboitem item, MyEntityBean bean, int index) throws Exception {
//set the text of the row
item.setLabel(bean.getData());
//set the value of the row (available when receiving events from Combobox)
item.setValue(bean);
}
};
myCb.setItemRenderer(myRenderer);
}
//listen on onSelect event from the component ID (#) myCb. See SelectorComposer documentation for more info on the selectors
@Listen("onSelect=#myCb")
public void handleCbChange(SelectEvent<Comboitem, MyEntityBean> event){
//get the selected object, and get the bean from the object value. Do whatever your need with the bean from there :)
Clients.log(((MyEntityBean)event.getSelectedItems().iterator().next().getValue()).getId());
}
// Demo bean with 2 fields. data is the public label, ID is the internal key (not displayed to users)
public class MyEntityBean{
private String id;
private String data;
public MyEntityBean(String id, String data) {
super();
this.id = id;
this.data = data;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getData() {
return data;
}
public void setData(String data) {
this.data = data;
}
}
}