Ordering Issue in "selectedItems" in listbox component

asked 2012-12-14 11:03:59 +0800

I am facing an issue in the ordering of items given by selectedItems of listbox components. The property "selectedItems" in component listbox given the selected items in HashSet i.e. in random order. But i need it in LinkedHashSet. Is there any way to get the selectedItems in the ordered way or in LinkedHashSet with related to the displayed List which is senderList in my case?

Below is my zul file: list.zul

<window apply="org.zkoss.bind.BindComposer"
	viewModel="@id('vm') @init('List1')">

	<listbox model="@bind(vm.senderList)" multiple="true"
		selectedItems="@save(vm.selectedSenders)" height="300px">
		<listhead>
			<listheader label="Sender"></listheader>
		</listhead>
		<template name="model" var="item">
			<listitem value="${item }">
				<listcell label="@load(item)"></listcell>
			</listitem>
		</template>
	</listbox>
	<div style="text-align:right; padding:5px;">

		<button mold="trendy" label="Submit"
			onClick="@command('submit')" />

	</div>
</window>

And my Java Code is as:
List1.java

public class List1 {

	private List<String> senderList;

	private Set<String> selectedSenders;

	public List<String> getSenderList() {
		if (senderList == null) {
			senderList = new ArrayList<String>();
			senderList.add("Sender1");
			senderList.add("Sender2");
			senderList.add("Sender3");
			senderList.add("Sender4");
			senderList.add("Sender5");
			senderList.add("Sender6");
			senderList.add("Sender7");
			senderList.add("Sender8");
			senderList.add("Sender9");
			senderList.add("Sender10");
		}
		return senderList;
	}
	public void setSenderList(List<String> senderList) {
		this.senderList = senderList;
	}

	public Set<String> getSelectedSenders() {
		return selectedSenders;
	}

	public void setSelectedSenders(Set<String> selectedSenders) {
		this.selectedSenders = selectedSenders;
	}

	@Command
	public void submit() {
		System.out.println("Printing Selected Senders...");
		for (String sender : selectedSenders) {
			System.out.println(sender);
		}
	}
}

I/p: Select Sender 2,3,4,5 and click on submit
O/p: on console: It prints Sender 5,3,4,2

I want the o/p to be as "Sender 2,3,4,5".

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