EDIT

package eu.etaxonomy.taxeditor.ui.element;

import org.eclipse.jface.resource.ResourceManager;

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.FormToolkit;

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;

public abstract class AbstractEntityCollectionElementComposite<ENTITY>

	extends AbstractCdmFormElementComposite

	implements IEntityElement<ENTITY>, SelectionListener, IConversationEnabled {

	protected ENTITY entity;

	private final Composite container;

	private final Composite box;

	private final Button button_remove;

	private Color backgroundColor;

    /**

     * Create the composite.

     *

     * @param parent

     * @param style

     */

    public AbstractEntityCollectionElementComposite(Composite parent, ICdmFormElement parentFormElement, FormToolkit formFactory, ENTITY entity, SelectionListener removeListener, int style) {

        super(parent, parentFormElement, style);

        box = formFactory.createComposite(parent);

        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());

        container = formFactory.createComposite(box);

        container.setBackgroundMode(SWT.INHERIT_DEFAULT);

        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(ResourceManager.getPluginImage("eu.etaxonomy.taxeditor.store", "icons/trash.gif"));

        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.

	 */

	@Override

    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.

	 */

	@Override

    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} */

	@Override

    public void setBackground(Color color) {

		backgroundColor = color;

		super.setBackground(backgroundColor);

		box.setBackground(backgroundColor);

		container.setBackground(backgroundColor);

	}

	/**

	 * {@inheritDoc}

	 *

	 * React when selection occurs

	 */

	@Override

    public void widgetSelected(SelectionEvent e) {

	}

	/** {@inheritDoc} */

	@Override

    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.

	 */

	@Override

    public ConversationHolder getConversationHolder() {

		if (getParentElement() instanceof IConversationEnabled) {

			return ((IConversationEnabled) getParentElement())

					.getConversationHolder();

		}

		throw new IllegalArgumentException(

				"Parent element should be IConversationEnabled");

	}

	/** {@inheritDoc} */

	@Override

    public void update(CdmDataChangeMap changeEvents) {

	}

}