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.store.StoreUtil;

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

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

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

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

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

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

import eu.etaxonomy.taxeditor.ui.element.NumberWithLabelElement;

/**

 * <p>ImageFileElement class.</p>

 *

 * @author n.hoffmann

 * @created Mar 26, 2010

 * @version 1.0

 */

public class ImageFileElement extends MediaRepresentationPartElement<ImageFile> {

	private NumberWithLabelElement text_height;

	private NumberWithLabelElement text_width;

	private KeyValueViewerElement element_keyValue;

	private ImageElement element_image;

	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.element.CdmFormFactory} object.

	 * @param section a {@link eu.etaxonomy.taxeditor.ui.element.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.createNumberTextWithLabelElement(formElement, "Height", null, style);

		text_height.setEnabled(false);

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

		text_width.setEnabled(false);

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

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

	}

	/** {@inheritDoc} */

	@Override

	public void setEntity(ImageFile entity) {

		super.setEntity(entity);

		text_height.setNumber(entity.getHeight());

		text_width.setNumber(entity.getWidth());

		try {

			loadImage(entity.getUri(), false);		

		} catch (Exception e) {

			handleException(e);

		}

	}

	private void loadImage(URI uri, boolean updateDimensions) throws IOException, HttpException{

		element_image.initImageUri(uri);

		element_image.loadImage(postRunnable );

		if(uri == null){

			return;

		}

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

		element_keyValue.setInput(imageInfo.getMetaData());

		if(updateDimensions){

			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.setNumber(imageInfo.getHeight());

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

			text_width.setNumber(imageInfo.getWidth());

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

		}

		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);

				loadImage(getEntity().getUri(), true);

				firePropertyChangeEvent(new CdmPropertyChangeEvent(this, null));

			} catch (Exception e) {

				handleException(e);

			} finally {				

				firePropertyChangeEvent(this);

			}

		}

	}

	protected void handleException(Exception e) {

		super.handleException(e);

		element_image.unloadImage(postRunnable);

		text_height.setNumber(0);

		text_width.setNumber(0);

		element_image.loadImage(new Runnable(){

			public void run() {

				StoreUtil.reflowDetailsViewer();

				StoreUtil.reflowSupplementalViewer();

			}

		});

	}

}