Tapestry Deli

example.application

<application name="example">
    <library id="xtile" specification-path="/org/mb/tapestry/xtile/xtile.library"/>
</application>

Home.html

<html jwcid="@Shell" title="XTile example">
<body jwcid="@Body">
    
Start typing the name of a country in the field below. <br>
The page will connect to the server and ask for possible completions. 
<p>
    <form name="f">
    <table cellspacing="0" cellpadding="0">
        <tr>
            <td>Country: </td>
            <td><input type="text" style="width: 200px" onkeyup="sendValue(this.value)"/></td>
        </tr>
        <tr>
            <td></td>
            <td><textarea name="comps" rows="10" style="width: 200px" disabled="true"></textarea></td>
        </tr>
    </table>
    </form>
    
    <span jwcid="@xtile:XTile" listener="ognl:listeners.handleCallback" 
        sendName="sendValue" receiveName="recvCompletions"/>
    
    <script>
        function recvCompletions(arr) {
        	document.f.comps.value = arr.join("\n");
        }
    </script>
    
    <span jwcid="@xtile:Timeout"/>
</body>
</html>

Home.java

public class XTileTest extends BasePage
{
	private final static int MAX_COMPLETIONS = 10;
	
	private static Set countries = new LinkedHashSet();
	
	static {
		Locale[] locales = Locale.getAvailableLocales();
		for (int i = 0; i < locales.length; i++) {
			String country = locales[i].getDisplayCountry();
			if (country != null) 
				countries.add(country);
		}
	}

	private String[] findCompletions(String typed)
	{
		if (typed.equals(""))
			return null;
		
		typed = typed.toLowerCase();
		
		List completions = new ArrayList();
		for (Iterator it = countries.iterator(); it.hasNext();) {
			String country = (String) it.next();
			if (country.toLowerCase().startsWith(typed))
				completions.add(country);
			if (completions.size() == MAX_COMPLETIONS)
				break;
		}
		Collections.sort(completions);
		
		return (String[]) completions.toArray(new String[completions.size()]);
	}
	
	
	public void handleCallback(IRequestCycle cycle)
	{
		Object[] params = cycle.getServiceParameters();
		if (params.length == 0) return;
		
		String typed = params[0].toString();
		String[] ret = findCompletions(typed);
		
		cycle.setServiceParameters(ret);
	}
	
}