home.java

Enjoy Web Dev With Tapestry 一书的源代码

package com.ttdev.currentdate;

import java.text.*;
import java.util.*;

import org.apache.tapestry.*;
import org.apache.tapestry.annotations.*;
import org.apache.tapestry.event.*;
import org.apache.tapestry.form.*;
import org.apache.tapestry.html.*;

public abstract class Home extends BasePage implements PageBeginRenderListener {
	@Message
	public abstract String getTodayIs(String dateStr);
	
	public String getDateSentence() {
		Locale locale = getLocale();
		DateFormat dateFormat = DateFormat.getDateInstance(DateFormat.LONG,	locale);
		String dateStr = dateFormat.format(new Date());
		return getTodayIs(dateStr);
	}

	public abstract Locale getSelectedLocale();
	public abstract void setSelectedLocale(Locale locale);

	public IPropertySelectionModel getSupportedLocales() {
		List locales = new ArrayList();
		locales.add(Locale.ENGLISH);
		locales.add(Locale.TAIWAN);
		return new LocaleSelectionModel(locales);
	}
	public void onSetLocale(IRequestCycle cycle) {
		getEngine().setLocale(getSelectedLocale());
		cycle.cleanup();
		cycle.activate(getPageName());
	}
	public void pageBeginRender(PageEvent event) {
		setSelectedLocale(getLocale());
	}
}