ChatConversationPresenter.java

package net.thesocialos.client.chat;

import java.util.ArrayList;
import java.util.List;

import net.thesocialos.client.TheSocialOS;
import net.thesocialos.client.app.IApplication;
import net.thesocialos.client.chat.events.ChatCloseConversation;
import net.thesocialos.client.chat.events.ChatHideConversation;
import net.thesocialos.client.chat.events.ChatSendMessage;
import net.thesocialos.client.chat.events.ChatTopConversations;
import net.thesocialos.client.chat.view.ChatConversationView;
import net.thesocialos.client.desktop.DesktopEventOnClose;
import net.thesocialos.client.desktop.DesktopEventOnTop;
import net.thesocialos.client.desktop.DesktopEventonEndDrag;
import net.thesocialos.client.desktop.DesktopUnit;
import net.thesocialos.client.desktop.window.events.WindowCloseEvent;
import net.thesocialos.client.desktop.window.events.WindowDisplay;
import net.thesocialos.client.desktop.window.events.WindowEndDragEvent;
import net.thesocialos.client.desktop.window.events.WindowEventHandler;
import net.thesocialos.client.desktop.window.events.WindowMaximizeEvent;
import net.thesocialos.client.desktop.window.events.WindowMinimizeEvent;
import net.thesocialos.client.desktop.window.events.WindowOnTopEvent;
import net.thesocialos.client.desktop.window.events.WindowResizeEvent;
import net.thesocialos.shared.model.Lines;
import net.thesocialos.shared.model.User;

import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.dom.client.KeyCodes;
import com.google.gwt.event.dom.client.KeyDownEvent;
import com.google.gwt.event.dom.client.KeyDownHandler;
import com.google.gwt.user.cellview.client.CellList;
import com.google.gwt.user.client.Timer;
import com.google.gwt.user.client.ui.AbsolutePanel;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.ScrollPanel;
import com.google.gwt.user.client.ui.TextArea;
import com.google.gwt.user.client.ui.Widget;
import com.google.gwt.view.client.ListDataProvider;
import com.googlecode.objectify.Key;

public class ChatConversationPresenter extends DesktopUnit implements IApplication {
	
	public interface Display {
		
		ChatConversationView getChatPanel();
		
		Button getSendButton();
		
		TextArea getSendText();
		
		CellList<Lines> getConversation();
		
		Label lblCharacters();
		
		ScrollPanel getScrollPanel();
		
		Widget asWidget();
	}
	
	private String name;
	private String image;
	
	private Display display;
	private Key<User> userWithChat;
	
	/*
	 * Los modelos de la cajas de seleccion de los contactos
	 */
	
	List<Lines> linesList = new ArrayList<Lines>();
	ListDataProvider<Lines> linesDataProvider = new ListDataProvider<Lines>(linesList);
	
	public ChatConversationPresenter(int programID, String appName, String appImageURL, Key<User> userWithChat,
			WindowDisplay windoDisplay, Display display) {
		super(programID, "Chat Conversation", windoDisplay, TypeUnit.WINDOW, true);
		setName(appName);
		setImage(appImageURL);
		
		this.display = display;
		this.userWithChat = userWithChat;
		
		init();
	}
	
	private void init() {
		bindHandlers();
		initWindow();
		linesDataProvider.addDataDisplay(display.getConversation());
		
	}
	
	private void bindHandlers() {
		display.getSendButton().addClickHandler(new ClickHandler() {
			
			@Override
			public void onClick(ClickEvent event) {
				if (!display.getSendText().getText().trim().isEmpty()) {
					TheSocialOS.getEventBus().fireEvent(
							new ChatSendMessage(userWithChat, display.getSendText().getText()));
					display.getSendText().setValue(null);
					event.preventDefault();
				} else
					event.preventDefault();
				
				if ((150 - display.getSendText().getText().length()) < 0)
					display.getSendText().setText(display.getSendText().getText().substring(0, 149));
				display.lblCharacters().setText(String.valueOf((150 - display.getSendText().getText().length())));
				
			}
		});
		
		display.getSendText().addKeyDownHandler(new KeyDownHandler() {
			
			@Override
			public void onKeyDown(KeyDownEvent event) {
				
				if (event.getNativeEvent().getKeyCode() == KeyCodes.KEY_ENTER)
					if (!display.getSendText().getText().trim().isEmpty()) {
						TheSocialOS.getEventBus().fireEvent(
								new ChatSendMessage(userWithChat, display.getSendText().getText()));
						display.getSendText().setValue(null);
						event.preventDefault();
					} else
						event.preventDefault();
				
				if ((150 - display.getSendText().getText().length()) < 0)
					display.getSendText().setText(display.getSendText().getText().substring(0, 149));
				display.lblCharacters().setText(String.valueOf((150 - display.getSendText().getText().length())));
				
			}
		});
		
		windowDisplay.addWindowEvents(new WindowEventHandler() {
			
			@Override
			public void onTop(WindowOnTopEvent event) {
				TheSocialOS.getEventBus().fireEvent(new ChatTopConversations(userWithChat));
				TheSocialOS.getEventBus().fireEvent(new DesktopEventOnTop(ChatConversationPresenter.this));
				
			}
			
			@Override
			public void onMinimize(WindowMinimizeEvent windowMinimizeEvent) {
				
				TheSocialOS.getEventBus().fireEvent(new ChatHideConversation(userWithChat));
				
			}
			
			@Override
			public void onMaximize(WindowMaximizeEvent windowMaximizeEvent) {
				// TODO Auto-generated method stub
				
			}
			
			@Override
			public void onEndDrag(WindowEndDragEvent event) {
				// TODO Auto-generated method stub
				TheSocialOS.getEventBus().fireEvent(new DesktopEventonEndDrag(ChatConversationPresenter.this));
			}
			
			@Override
			public void onClose(WindowCloseEvent event) {
				TheSocialOS.getEventBus().fireEvent(new ChatCloseConversation(userWithChat));
				TheSocialOS.getEventBus().fireEvent(new DesktopEventOnClose(ChatConversationPresenter.this));
				
			}
			
			@Override
			public void onResize(WindowResizeEvent event) {
				// TODO Auto-generated method stub
				
			}
		});
	}
	
	/**
	 * Write a messageChat in the window
	 * 
	 * @param message
	 *            to write in the chat window
	 */
	public void writeMessage(Lines line) {
		
		linesList.add(line);
		linesDataProvider.flush();
		linesDataProvider.refresh();
		// display.getScrollPanel().scrollToBottom();
		// display.getScrollPanel().setVerticalScrollPosition(
		// display.getScrollPanel().getMaximumVerticalScrollPosition() - 20);
		scrollTobottom();
		
	}
	
	private void scrollTobottom() {
		Timer timer = new Timer() {
			
			@Override
			public void run() {
				display.getScrollPanel().scrollToBottom();
				cancel();
				
			}
		};
		timer.schedule(300);
		/*
		 * Scheduler.get().scheduleDeferred(new Scheduler.ScheduledCommand() {
		 * @Override public void execute() { // your commands here } });
		 */
	}
	
	/**
	 * Make the window have go on top of the desktop
	 */
	public void setOnTop() {
		TheSocialOS.getEventBus().fireEvent(new DesktopEventOnTop(this));
	}
	
	@Override
	public String getImage() {
		// TODO Auto-generated method stub
		return image;
	}
	
	@Override
	public String getName() {
		// TODO Auto-generated method stub
		return name;
	}
	
	@Override
	public void setImage(String image) {
		this.image = image;
		
	}
	
	@Override
	public void setName(String name) {
		this.name = name;
		
	}
	
	@Override
	public void close(AbsolutePanel absolutePanel) {
		absolutePanel.remove(windowDisplay.getWindow());
		
	}
	
	@Override
	public int getZposition() {
		// TODO Auto-generated method stub
		return 0;
	}
	
	@Override
	public void open(AbsolutePanel absolutePanel) {
		
		absolutePanel.add(windowDisplay.getWindow(), 20, 50);
		windowDisplay.getWindow().setVisible(true);
		scrollTobottom();
		// absolutePanel.add(display.asWidget(), 20, 50);
		
	}
	
	private void initWindow() {
		
		windowDisplay.setResizable(false);
		windowDisplay.setWindowTitle(userWithChat.getName());
		display.asWidget().setSize("447px", "323px");
		windowDisplay.getWindow().add(display.asWidget());
		
	}
	
	@Override
	public void toZPosition(int position) {
		// TODO Auto-generated method stub
		
	}
	
}