FileUploadPresenter.java

package ie.flax.flaxengine.client.weave.presenter;

import ie.flax.flaxengine.client.Graphic.Graphic;
import ie.flax.flaxengine.client.events.ImageSelectionEvent.Identifier;
import ie.flax.flaxengine.client.weave.view.FileUploadView;

import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.dom.client.HasClickHandlers;
import com.google.gwt.event.dom.client.HasKeyPressHandlers;
import com.google.gwt.event.dom.client.KeyCodes;
import com.google.gwt.event.dom.client.KeyPressEvent;
import com.google.gwt.event.dom.client.KeyPressHandler;
import com.google.gwt.event.dom.client.LoadEvent;
import com.google.gwt.event.dom.client.LoadHandler;
import com.google.gwt.user.client.ui.Widget;

/**
 * The presenter which handles the logic of the fileupload view
 * @author Ciarán McCann
 *
 */
public class FileUploadPresenter extends AbstractPresenter {
	
	private final String SUCESSFUL_LOAD = "postive";
	private Display display;
	private ImageLibPresenter imageLibaryPresenter;
	
	//TODO Finish convert to new MVP
	public interface Display
	{
		HasClickHandlers getUploadButton();
		HasKeyPressHandlers getUrlBox();
		HasClickHandlers getUrlBoxClick();
		void setFeedback(String msg, String styleName);
		String getUrl();
		void clearUrlBox();
	
		Widget asWidgets();
	}
	
	/*
	 * This Presneter handles the upload view and also inserts an imageLibView into the widget, which
	 * is updated when a new image is uploaded
	 */
	public FileUploadPresenter()
	{
		this.display = new FileUploadView();
		imageLibaryPresenter = new ImageLibPresenter(Identifier.NONE);	
		bind();
	}

	
	public void bind() {
		
		display.getUploadButton().addClickHandler(new ClickHandler() {
			
			@Override
			public void onClick(ClickEvent event) {				
				loadprocess();				
			}
		});
		
		
		display.getUrlBox().addKeyPressHandler( new KeyPressHandler() {
			
			@Override
			public void onKeyPress(KeyPressEvent event) {
				
				if(event.getCharCode() == KeyCodes.KEY_ENTER)
					loadprocess();			
				}
		});
		
		display.getUrlBoxClick().addClickHandler( new ClickHandler() {
			
			@Override
			public void onClick(ClickEvent event) {
				display.clearUrlBox();			
			}
		});
		
		
	}

	private void loadprocess()
	{
		
		if(display.getUrl() != null)
		{

			display.setFeedback("Image Loading...",""); 
			Graphic.getSingleton().loadImage(display.getUrl()).addLoadHanderl( new LoadHandler() {
				
				@Override
				public void onLoad(LoadEvent event) {
			
					display.setFeedback("Image Loaded", SUCESSFUL_LOAD);
					imageLibaryPresenter.populate();
				}
			});
		}	
	}


	@Override
	public Widget getView() {
		return display.asWidgets();
	}

}