ZK Fiddle - X: Select w/ Optgroup

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resources

index.zulzul<zk xmlns:x="xhtml" > <div apply="org.zkoss.bind.BindComposer" viewModel="@id('vm') @init('pkg$.TestVM')"> select:<x:select children="@bind(vm.model)"> <template name="children"> <x:optgroup label="@bind(each.label)" children="@bind(each.children)"> <template name="children"> <x:option value="@bind(each)">${each.value}</x:option> </template> </x:optgroup> </template> </x:select> </div> </zk>TestVM.javajavaimport org.zkoss.zul.*; import java.util.List; import java.util.ArrayList; import org.zkoss.zhtml.Select; import org.zkoss.zhtml.Option; import org.zkoss.zhtml.Optgroup; import org.zkoss.zk.ui.HtmlBasedComponent; public class TestVM { List<Optgroup> groups = new ArrayList<Optgroup>(); public ListModel getModel () { Optgroup group = new Optgroup(); group.setLabel("North America"); Option opt = new Option(); opt.setValue("US"); group.appendChild(opt); opt = new Option(); opt.setValue("Brazil"); group.appendChild(opt); opt = new Option(); opt.setValue("Canada"); group.appendChild(opt); opt = new Option(); opt.setValue("Mexico"); group.appendChild(opt); groups.add(group); group = new Optgroup(); group.setLabel("Europe"); opt = new Option(); opt.setValue("Belgium"); opt.setParent(group); opt = new Option(); opt.setValue("Egypt"); opt.setParent(group); opt = new Option(); opt.setValue("France"); opt.setParent(group); opt = new Option(); opt.setValue("France"); opt.setParent(group); opt = new Option(); opt.setValue("Germany"); opt.setParent(group); opt = new Option(); opt.setValue("India"); opt.setParent(group); opt = new Option(); opt.setValue("Italy"); opt.setParent(group); opt = new Option(); opt.setValue("Netherlands"); opt.setParent(group); opt = new Option(); opt.setValue("Poland"); opt.setParent(group); opt = new Option(); opt.setValue("Saudi Arabia"); opt.setParent(group); opt = new Option(); opt.setValue("Spain"); opt.setParent(group); opt = new Option(); opt.setValue("Sweden"); opt.setParent(group); opt = new Option(); opt.setValue("Turkey"); opt.setParent(group); opt = new Option(); opt.setValue("UAE"); opt.setParent(group); opt = new Option(); opt.setValue("UK"); opt.setParent(group); groups.add(group); group = new Optgroup(); group.setLabel("Far East"); opt = new Option(); opt.setValue("Australia"); group.appendChild(opt); opt = new Option(); opt.setValue("Japan"); group.appendChild(opt); opt = new Option(); opt.setValue("Singapore"); group.appendChild(opt); opt = new Option(); groups.add(group); return new ListModelList(groups); } public List<Optgroup> getGroups() { return groups; } }