EDIT

/**

* 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.editor.name.container;

import java.util.ArrayList;

import java.util.List;

import org.eclipse.swt.SWT;

import org.eclipse.swt.dnd.DND;

import org.eclipse.swt.dnd.DropTarget;

import org.eclipse.swt.dnd.DropTargetListener;

import org.eclipse.swt.dnd.Transfer;

import org.eclipse.swt.graphics.Color;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Display;

import org.eclipse.swt.widgets.Menu;

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

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

import eu.etaxonomy.cdm.model.common.CdmBase;

import eu.etaxonomy.taxeditor.editor.CdmDataTransfer;

import eu.etaxonomy.taxeditor.editor.EditorUtil;

import eu.etaxonomy.taxeditor.editor.IDropTargetable;

import eu.etaxonomy.taxeditor.editor.name.TaxonNameEditor;

import eu.etaxonomy.taxeditor.editor.name.dnd.NameEditorDropTargetEffect;

import eu.etaxonomy.taxeditor.editor.name.dnd.NameEditorDropTargetListener;

import eu.etaxonomy.taxeditor.preference.Resources;

/**

 * <p>Abstract AbstractGroup class.</p>

 *

 * @author p.ciardelli

 * @author n.hoffmann

 * @created 25.06.2008

 * @version 1.0

 */

public abstract class AbstractGroup implements IDropTargetable{

	private Composite control;

	private List<AbstractGroupedContainer> groupedContainers = new ArrayList<AbstractGroupedContainer>(); 

	protected TaxonNameEditor editor;

	private DropTarget target;

	private DropTargetListener dropListener;

	/**

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

	 *

	 * @param editor a {@link eu.etaxonomy.taxeditor.editor.name.TaxonNameEditor} object.

	 * @param <T> a T object.

	 */

	public AbstractGroup(TaxonNameEditor editor){

		this.editor = editor;

	}

	protected void createContent(){

		createControl();

		createContainers();

		// Drop functionality

		this.setDroppable(true);

		editor.getManagedForm().reflow(true);

	}

	/**

	 * <p>createControl</p>

	 */

	protected void createControl() {

		control = editor.getToolkit().createComposite(editor.getControl());

		control.setLayoutData(new TableWrapData(TableWrapData.FILL_GRAB));

		TableWrapLayout layout = new TableWrapLayout();

		layout.topMargin = 0;

		layout.rightMargin = 0;

		layout.bottomMargin = 1;

		layout.leftMargin = 0;

		layout.verticalSpacing = 0;

		layout.horizontalSpacing = 0;

		control.setLayout(layout);

		control.setBackground(Display.getDefault().getSystemColor(SWT.COLOR_GRAY));

	}

	/**

	 * <p>add</p>

	 *

	 * @param groupedContainer a {@link eu.etaxonomy.taxeditor.editor.name.container.AbstractGroupedContainer} object.

	 */

	public void add(AbstractGroupedContainer groupedContainer){

		groupedContainers.add(groupedContainer);

		groupedContainer.setGroup(this);

	}

	/**

	 * <p>remove</p>

	 *

	 * @param groupedContainer a {@link eu.etaxonomy.taxeditor.editor.name.container.AbstractGroupedContainer} object.

	 */

	public void remove(AbstractGroupedContainer groupedContainer){

		groupedContainer.dispose();

		groupedContainers.remove(groupedContainer);

		if(!(this instanceof AcceptedGroup) && groupedContainers.isEmpty()){

			getEditor().removeGroup(this);

		}

	}	

	/**

	 * <p>Getter for the field <code>groupedContainers</code>.</p>

	 *

	 * @return a {@link java.util.List} object.

	 */

	public List<AbstractGroupedContainer> getGroupedContainers(){

		return groupedContainers;

	}

	/**

	 * <p>setDroppable</p>

	 *

	 * @param droppable a boolean.

	 */

	public void setDroppable(boolean droppable) {

		if (droppable) {

			Transfer[] types = new Transfer[] {CdmDataTransfer.getInstance()};	

			int operations = DND.DROP_MOVE;

			target = new DropTarget(control, operations);

			target.setTransfer(types);

			dropListener = new NameEditorDropTargetListener(this);

			target.addDropListener(dropListener);

			target.setDropTargetEffect(new NameEditorDropTargetEffect(control));

		} else {

			if (dropListener != null) {

				target.removeDropListener(dropListener);

			}

		}

	}

	/**

	 * <p>getNameEditor</p>

	 *

	 * @return a {@link eu.etaxonomy.taxeditor.editor.name.TaxonNameEditor} object.

	 */

	public TaxonNameEditor getEditor() {

		return editor;

	}

	/**

	 * <p>dragEntered</p>

	 */

	public void dragEntered() {

		Color color = EditorUtil.getColor(Resources.COLOR_DRAG_ENTER);

		for(AbstractGroupedContainer container : groupedContainers){

			container.setBackground(color);

		}		

	}

	/**

	 * <p>dragLeft</p>

	 */

	public void dragLeft() {

		for(AbstractGroupedContainer container : groupedContainers){

			container.restoreColor();

		}

	}

	/** {@inheritDoc} */

	public boolean postOperation(CdmBase objectAffectedByOperation) {

		editor.getMultiPageTaxonEditor().changed(null);

		redraw();

		return true;

	}

	/**

	 * <p>redraw</p>

	 */

	public void redraw(){

		emptyGroup();

		createContainers();

	}

	protected abstract void createContainers();

	/* (non-Javadoc)

	 * @see eu.etaxonomy.taxeditor.editor.IDropTargetable#getControl()

	 */

	@Override

	public Composite getControl() {

		return control;

	}

	/* (non-Javadoc)

	 * @see eu.etaxonomy.taxeditor.operation.IPostOperationEnabled#onComplete()

	 */

	@Override

	public boolean onComplete() {

		return true;

	}

	public void dispose(){

		if(getControl() != null){

			for(AbstractGroupedContainer container : getGroupedContainers()){

				container.dispose();

			}

			getControl().setMenu(null);

			getControl().dispose();

		}

	}

	/**

	 * @param object

	 */

	public void setMenu(Menu menu) {

		getControl().setMenu(menu);

		for(AbstractGroupedContainer container : getGroupedContainers()){

			container.setMenu(menu);

		}

	}

	protected void emptyGroup(){

		for(AbstractGroupedContainer container : groupedContainers){

			container.dispose();

		}

		groupedContainers.clear();

	}

}