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.editor.view;

import org.apache.log4j.Logger;

import org.eclipse.jface.util.IPropertyChangeListener;

import org.eclipse.jface.util.PropertyChangeEvent;

import org.eclipse.jface.viewers.ISelectionProvider;

import org.eclipse.jface.viewers.StructuredSelection;

import org.eclipse.jface.viewers.Viewer;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Control;

import org.eclipse.swt.widgets.Display;

import org.eclipse.ui.forms.IFormPart;

import org.eclipse.ui.forms.ManagedForm;

import org.eclipse.ui.forms.events.IExpansionListener;

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

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.forms.AbstractFormSection;

import eu.etaxonomy.taxeditor.forms.CdmFormFactory;

import eu.etaxonomy.taxeditor.forms.RootElement;

/**

 * @author n.hoffmann

 * @created Feb 9, 2010

 * @version 1.0

 */

public abstract class AbstractCdmDataViewer extends Viewer implements IPropertyChangeListener, ISelectionProvider, IConversationEnabled{

	private static final Logger logger = Logger

			.getLogger(AbstractCdmDataViewer.class);

	protected ManagedForm managedForm;

	protected CdmFormFactory formFactory;

	protected ScrolledForm scrolledForm;

	private Composite body;

	protected RootElement rootElement;

	private Object input;

	private AbstractCdmViewPart viewPart;

	/**

	 * 

	 */

	public AbstractCdmDataViewer(Composite parent, AbstractCdmViewPart viewPart) {

		this.viewPart = viewPart;

		managedForm = new ManagedForm(parent){

			/* (non-Javadoc)

			 * @see org.eclipse.ui.forms.ManagedForm#dirtyStateChanged()

			 */

			@Override

			public void dirtyStateChanged() {

				markViewPartDirty();

			}

		};

		createFormFactory();

		formFactory.addPropertyChangeListener(this);

		scrolledForm = managedForm.getForm();

		body = scrolledForm.getBody();

		body.setLayout(CdmFormFactory.LAYOUT());

		rootElement = new RootElement(formFactory, body);

	}

	protected void createFormFactory() {

		if(formFactory != null){

			formFactory.dispose();

			formFactory = null;

		}

		formFactory = new CdmFormFactory(Display.getCurrent(), this);

	}

	private void markViewPartDirty(){

		viewPart.dirtyStateChanged();

	}

	/* (non-Javadoc)

	 * @see org.eclipse.jface.viewers.Viewer#getControl()

	 */

	@Override

	public Control getControl() {

		for(Control child : body.getChildren()){

			return child;

		}

		return body;

	}

	/* (non-Javadoc)

	 * @see org.eclipse.jface.viewers.Viewer#setInput(java.lang.Object)

	 */

	@Override

	public void setInput(Object input) {

		this.input = input;	

		// reset selection

		setSelection(new StructuredSelection(input));

		refresh();

	}

	/* (non-Javadoc)

	 * @see org.eclipse.jface.viewers.Viewer#getInput()

	 */

	@Override

	public Object getInput() {

		return input;

	}

	/* (non-Javadoc)

	 * @see org.eclipse.jface.viewers.Viewer#refresh()

	 */

	@Override

	public void refresh() {

		showParts();

		managedForm.setInput(input);

		managedForm.refresh();

		managedForm.reflow(true);

	}

	public void layout(){

		body.layout();

	}

	protected abstract void showParts();

	protected void destroySections() {	

		for (IFormPart formPart : managedForm.getParts()){

			removePart((CdmSectionPart) formPart);

		}	

		managedForm.setInput(null);

		formFactory.destroyElement(rootElement);

		createFormFactory();

		rootElement = new RootElement(formFactory, body);

		for(Control control : body.getChildren()){

			control.dispose();

			control = null;

		}

	}

	public void setFocus(){

		// we have to set focus to a control of this viewer

		// otherwise, after opening a dialog from the details, the focus will not be

		// given back to the details view but to the editor

		for(Control child : body.getChildren()){

			child.setFocus();

			break;

		}

	}

	public void reflow(){

		managedForm.reflow(true);

	}

	/* (non-Javadoc)

	 * @see org.eclipse.jface.util.IPropertyChangeListener#propertyChange(org.eclipse.jface.util.PropertyChangeEvent)

	 */

	public void propertyChange(PropertyChangeEvent event) {

		logger.warn("Property changed: " + event);

	}

	protected void removePart(CdmSectionPart sectionPart){

		managedForm.removePart(sectionPart);

		formFactory.removePropertyChangeListener(sectionPart);

	}

	protected void addPart(AbstractFormSection section){

		CdmSectionPart sectionPart = new CdmSectionPart(section);

		managedForm.addPart(sectionPart);

		formFactory.addPropertyChangeListener(sectionPart);

	}

	public ConversationHolder getConversationHolder() {

		return viewPart.getConversationHolder();

	}

	public void update(CdmDataChangeMap changeEvents) {}

}