EDIT

// $Id$

/**

* Copyright (C) 2007 EDIT

* European Distributed Institute of Taxonomy 

* http://www.e-taxonomy.eu

* 

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.taxeditor.ui.section.media;

import java.io.IOException;

import java.net.URI;

import org.apache.commons.io.FileUtils;

import org.apache.commons.lang.StringUtils;

import org.apache.http.HttpException;

import org.eclipse.swt.events.SelectionListener;

import eu.etaxonomy.cdm.common.media.ImageInfo;

import eu.etaxonomy.cdm.model.media.ImageFile;

import eu.etaxonomy.taxeditor.singlesource.ui.forms.NumberWithLabelElementFacade;

import eu.etaxonomy.taxeditor.store.StoreUtil;

import eu.etaxonomy.taxeditor.ui.forms.AbstractFormSection;

import eu.etaxonomy.taxeditor.ui.forms.CdmFormFactory;

import eu.etaxonomy.taxeditor.ui.forms.CdmPropertyChangeEvent;

import eu.etaxonomy.taxeditor.ui.forms.ICdmFormElement;

import eu.etaxonomy.taxeditor.ui.forms.ImageElement;

import eu.etaxonomy.taxeditor.ui.forms.KeyValueViewerElement;

import eu.etaxonomy.taxeditor.ui.forms.LabelElement;

/**

 * <p>ImageFileElement class.</p>

 *

 * @author n.hoffmann

 * @created Mar 26, 2010

 * @version 1.0

 */

public class ImageFileElement extends AbstractMediaRepresentationPartElement<ImageFile> {

	private NumberWithLabelElementFacade text_height;

	private NumberWithLabelElementFacade text_width;

	private KeyValueViewerElement element_keyValue;

	private ImageElement element_image;

	private LabelElement element_messages;

	private Runnable postRunnable = new Runnable(){

		public void run() {

			StoreUtil.reflowDetailsViewer();

			StoreUtil.reflowSupplementalViewer();

		}

	};

	/**

	 * <p>Constructor for ImageFileElement.</p>

	 *

	 * @param cdmFormFactory a {@link eu.etaxonomy.taxeditor.ui.forms.CdmFormFactory} object.

	 * @param section a {@link eu.etaxonomy.taxeditor.ui.forms.AbstractFormSection} object.

	 * @param element a {@link eu.etaxonomy.cdm.model.media.ImageFile} object.

	 * @param removeListener a {@link org.eclipse.swt.events.SelectionListener} object.

	 * @param style a int.

	 */

	public ImageFileElement(CdmFormFactory cdmFormFactory,

			AbstractFormSection section, ImageFile element,

			SelectionListener removeListener, int style) {

		super(cdmFormFactory, section, element, removeListener, style);

	}

	/** {@inheritDoc} */

	@Override

	public void createControls(ICdmFormElement formElement, int style) {

		super.createControls(formElement, style);

		text_height = formFactory.createIntegerTextWithLabelElement(formElement, "Height", null, style);

		text_height.setEnabled(false);

		text_width = formFactory.createIntegerTextWithLabelElement(formElement, "Width", null, style);

		text_width.setEnabled(false);

		element_image = formFactory.createImageElement(formElement, null, style);

		element_messages = formFactory.createLabel(formElement, "");

		element_keyValue = formFactory.createKeyValueViewerElement(formElement, "Key", "Value", null);

	}

	/** {@inheritDoc} */

	@Override

	public void setEntity(ImageFile entity) {

		this.entity = entity;

		if(entity.getSize() != null){

			text_size.setText(FileUtils.byteCountToDisplaySize(entity.getSize()));

		}

		text_height.setInteger(entity.getHeight());

		text_width.setInteger(entity.getWidth());

		if(entity.getUri() != null){

			text_uri.setText(entity.getUri().toString());

		}

		try {

			showImage(entity.getUri());		

			element_messages.setText("");

		} catch (Exception e) {

			handleException(e);

		}

	}

	private void showImage(URI uri) throws IOException, HttpException{

		element_image.initImageUri(uri);

		element_image.loadImage(postRunnable );

		if(uri == null){

			return;

		}

		ImageInfo imageInfo = ImageInfo.NewInstanceWithMetaData(uri, 10000);

		text_size.setText(FileUtils.byteCountToDisplaySize(imageInfo.getLength()));

		// KLUDGE this is not save for very large files, because of the int cast. But then, I don't think we will handle such large files in the near future

		getEntity().setSize((int) imageInfo.getLength());

		text_height.setInteger(imageInfo.getHeight());

		getEntity().setHeight(imageInfo.getHeight());

		text_width.setInteger(imageInfo.getWidth());

		getEntity().setWidth(imageInfo.getWidth());

		element_keyValue.setInput(imageInfo.getMetaData());

		element_messages.setText("");

	}

	/*

	 * (non-Javadoc)

	 * @see eu.etaxonomy.taxeditor.section.AbstractEntityCollectionElement#handleEvent(java.lang.Object)

	 */

	/** {@inheritDoc} */

	@Override

	public void handleEvent(Object eventSource) {

		if(eventSource == text_uri){

			try {

				String uriString = text_uri.getText();

				URI uri = StringUtils.isNotEmpty(uriString) ? new URI(uriString) : null;

				getEntity().setUri(uri);

				showImage(getEntity().getUri());

				firePropertyChangeEvent(new CdmPropertyChangeEvent(this, null));

			} catch (Exception e) {

				handleException(e);

			} finally {				

				firePropertyChangeEvent(this);

			}

		}

	}

	private void handleException(Exception e) {

		element_messages.setText(e.getMessage());

		element_image.unloadImage(postRunnable);

		text_size.setText("");

		text_height.setInteger(0);

		text_width.setInteger(0);

		element_image.loadImage(new Runnable(){

			public void run() {

				StoreUtil.reflowDetailsViewer();

				StoreUtil.reflowSupplementalViewer();

			}

		});

	}

}