org.eclipse.osbp.vaaclipse.addons.softwarefactory/src/org/eclipse/osbp/vaaclipse/addons/softwarefactory/welcome/WelcomeView.java

/**
 *                                                                            
 *  Copyright (c) 2011, 2016 - Loetz GmbH&Co.KG (69115 Heidelberg, Germany) 
 *                                                                            
 *  All rights reserved. This program and the accompanying materials           
 *  are made available under the terms of the Eclipse Public License 2.0        
 *  which accompanies this distribution, and is available at                  
 *  https://www.eclipse.org/legal/epl-2.0/                                 
 *                                 
 *  SPDX-License-Identifier: EPL-2.0                                 
 *                                                                            
 *  Contributors:                                                      
 * 	   Christophe Loetz (Loetz GmbH&Co.KG) - initial implementation
 * 
 */
package org.eclipse.osbp.vaaclipse.addons.softwarefactory.welcome;

import java.util.Locale;

import javax.annotation.PostConstruct;
import javax.inject.Inject;

import org.eclipse.e4.core.contexts.IEclipseContext;
import org.eclipse.e4.ui.model.application.MApplication;
import org.eclipse.osbp.ui.api.themes.IThemeResourceService;
import org.eclipse.osbp.ui.api.user.IUser;

import com.vaadin.server.ClientConnector;
import com.vaadin.server.ClientConnector.AttachEvent;
import com.vaadin.server.ClientConnector.DetachEvent;
import com.vaadin.shared.ui.label.ContentMode;
import com.vaadin.ui.AbstractComponent;
import com.vaadin.ui.Label;
import com.vaadin.ui.VerticalLayout;

public class WelcomeView implements IUser.UserLocaleListener, ClientConnector.DetachListener, ClientConnector.AttachListener {

	private static final long serialVersionUID = 1L;
	private AbstractComponent label = null;
	private VerticalLayout parent;
	private IThemeResourceService themeResourceService;
	private IUser user;
	private Locale locale;

	@Inject
	public WelcomeView(VerticalLayout parent, IEclipseContext context, MApplication app) {
		this.parent = parent;
		this.themeResourceService = context.get(IThemeResourceService.class);
		this.user = context.get(IUser.class);
		locale = user.getLocale();
		parent.addStyleName("os-welcome");
	    parent.addAttachListener(this);
	    parent.addDetachListener(this);
	}
	
	@PostConstruct
	public void render() {
		renderView();
	}

	private void renderView() {
		if (label != null) {
			parent.removeComponent(label);
		}
		label = new Label(themeResourceService.getThemeResourceHTML("WelcomeTRANSLATABLE", locale), ContentMode.HTML);
		label.setSizeFull();
		parent.addComponent(label);
		parent.setMargin(true);
	}

	@Override
	public void attach(AttachEvent event) {
	    user.addUserLocaleListener(this);
	}

	@Override
	public void detach(DetachEvent event) {
	    user.removeUserLocaleListener(this);
	}

	@Override
	public void localeChanged(Locale locale) {
		this.locale = locale;
		parent.removeAllComponents();
		renderView();
	}
}