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;

import org.eclipse.jface.util.PropertyChangeEvent;

import org.eclipse.swt.SWT;

import org.eclipse.swt.events.SelectionEvent;

import org.eclipse.swt.events.SelectionListener;

import org.eclipse.swt.graphics.Color;

import org.eclipse.swt.widgets.Button;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Layout;

import org.eclipse.ui.forms.widgets.TableWrapLayout;

import eu.etaxonomy.cdm.api.conversation.ConversationHolder;

import eu.etaxonomy.cdm.api.conversation.IConversationEnabled;

import eu.etaxonomy.cdm.persistence.hibernate.CdmDataChangeMap;

import eu.etaxonomy.taxeditor.model.ImageResources;

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

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

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

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

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

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

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

/**

 * <p>

 * Abstract AbstractEntityCollectionElement class.

 * </p>

 * 

 * @author n.hoffmann

 * @created Nov 16, 2009

 * @version 1.0

 */

public abstract class AbstractEntityCollectionElement<ENTITY> extends

		AbstractCdmFormElement implements IEntityElement<ENTITY>,

		SelectionListener, IConversationEnabled, ISelectable {

	protected ENTITY entity;

	private Composite container;

	private Composite box;

	private Button button_remove;

	private Color backgroundColor;

	/**

	 * <p>

	 * Constructor for AbstractEntityCollectionElement.

	 * </p>

	 * 

	 * @param style

	 *            a int.

	 * @param formFactory

	 *            a {@link eu.etaxonomy.taxeditor.ui.element.CdmFormFactory}

	 *            object.

	 * @param section

	 *            a {@link eu.etaxonomy.taxeditor.ui.element.AbstractFormSection}

	 *            object.

	 * @param entity

	 *            a ENTITY object.

	 * @param removeListener

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

	 * @param <ENTITY>

	 *            a ENTITY object.

	 */

	public AbstractEntityCollectionElement(CdmFormFactory formFactory,

			AbstractFormSection section, ENTITY entity,

			SelectionListener removeListener, Color backgroundColor, int style) {

		super(formFactory, (ICdmFormElement) section);

		init();

		formFactory.addPropertyChangeListener(this);

		// section.getLayoutComposite().setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_CYAN));

		box = formFactory.createComposite(section.getLayoutComposite());

		box.setBackgroundMode(SWT.INHERIT_DEFAULT);

		addControl(box);

		TableWrapLayout boxLayout = LayoutConstants.LAYOUT(2, false);

		boxLayout.topMargin = 4;

		boxLayout.bottomMargin = 4;

		box.setLayout(boxLayout);

		box.setLayoutData(LayoutConstants.FILL_HORIZONTALLY());

		// box.setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_BLUE));

		container = formFactory.createComposite(box);

		container.setBackgroundMode(SWT.INHERIT_DEFAULT);

		// container.setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_RED));

		setLayoutComposite(container);

		addControl(container);

		Layout containerLayout = LayoutConstants.LAYOUT(2, false);

		container.setLayout(containerLayout);

		container.setLayoutData(LayoutConstants.FILL_HORIZONTALLY());

		if (removeListener != null) {

			button_remove = formFactory.createButton(box, null, SWT.PUSH);

			addControl(button_remove);

			button_remove.setLayoutData(LayoutConstants.RIGHT());

			button_remove.setImage(ImageResources

					.getImage(ImageResources.TRASH_ICON));

			button_remove.setToolTipText("Remove");

			button_remove.addSelectionListener(removeListener);

		}

		createControls(this, style);

		setEntity(entity);

	}

	/**

	 * Init gets executed before any other setup of the section takes place

	 * 

	 * Implement this if you want to configure the section

	 */

	public void init() {

		// default implementation is empty

	}

	/**

	 * <p>

	 * Setter for the field <code>entity</code>.

	 * </p>

	 * 

	 * @param entity

	 *            a ENTITY object.

	 */

	public abstract void setEntity(ENTITY entity);

	/**

	 * <p>

	 * Getter for the field <code>entity</code>.

	 * </p>

	 * 

	 * @return a ENTITY object.

	 */

	public ENTITY getEntity() {

		return entity;

	}

	/**

	 * <p>

	 * createControls

	 * </p>

	 * 

	 * @param element

	 *            a {@link eu.etaxonomy.taxeditor.ui.element.ICdmFormElement}

	 *            object.

	 * @param style

	 *            a int.

	 */

	public abstract void createControls(ICdmFormElement element, int style);

	/**

	 * Mark <code>this</code> element as selected.

	 */

	public void setSelected(boolean selected) {

		for (ICdmFormElement element : getElements()) {

			if (element instanceof ISelectable) {

				((ISelectable) element).setSelected(selected);

			}

		}

		setBackground(selected ? SELECTED : getPersistentBackground());

	}

	/*

	 * (non-Javadoc)

	 * 

	 * @see

	 * eu.etaxonomy.taxeditor.forms.AbstractCdmFormElement#propertyChange(org

	 * .eclipse.jface.util.PropertyChangeEvent)

	 */

	/** {@inheritDoc} */

	@Override

	public void propertyChange(PropertyChangeEvent event) {

		if (event == null) {

			return;

		}

		Object eventSource = event.getSource();

		if (getElements().contains(eventSource)) {

			handleEvent(eventSource);

		}

	}

	/**

	 * <p>

	 * handleEvent

	 * </p>

	 * 

	 * @param eventSource

	 *            a {@link java.lang.Object} object.

	 */

	public abstract void handleEvent(Object eventSource);

	/** {@inheritDoc} */

	public void setBackground(Color color) {

		backgroundColor = color;

		super.setBackground(color);

		box.setBackground(color);

		container.setBackground(color);

	}

	/**

	 * {@inheritDoc}

	 * 

	 * React when selection occurs

	 */

	public void widgetSelected(SelectionEvent e) {

	}

	/** {@inheritDoc} */

	public void widgetDefaultSelected(SelectionEvent e) {

	}

	/** {@inheritDoc} */

	@Override

	public Composite getLayoutComposite() {

		return container;

	}

	/**

	 * <p>

	 * Getter for the field <code>backgroundColor</code>.

	 * </p>

	 * 

	 * @return the backgroundColor

	 */

	public Color getBackgroundColor() {

		return backgroundColor;

	}

	/**

	 * <p>

	 * getConversationHolder

	 * </p>

	 * 

	 * @return a {@link eu.etaxonomy.cdm.api.conversation.ConversationHolder}

	 *         object.

	 */

	public ConversationHolder getConversationHolder() {

		if (getParentElement() instanceof IConversationEnabled) {

			return ((IConversationEnabled) getParentElement())

					.getConversationHolder();

		}

		throw new IllegalArgumentException(

				"Parent element should be IConversationEnabled");

	}

	/** {@inheritDoc} */

	public void update(CdmDataChangeMap changeEvents) {

	}

}