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.view.uses;

import java.util.HashMap;

import java.util.Map;

import org.eclipse.jface.action.Action;

import org.eclipse.jface.action.GroupMarker;

import org.eclipse.jface.action.IToolBarManager;

import org.eclipse.jface.action.MenuManager;

import org.eclipse.jface.resource.ImageDescriptor;

import org.eclipse.jface.viewers.ISelection;

import org.eclipse.jface.viewers.StructuredSelection;

import org.eclipse.jface.viewers.TreeViewer;

import org.eclipse.swt.SWT;

import org.eclipse.swt.dnd.DND;

import org.eclipse.swt.dnd.Transfer;

import org.eclipse.swt.graphics.ImageData;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Control;

import org.eclipse.swt.widgets.Menu;

import org.eclipse.swt.widgets.Tree;

import org.eclipse.ui.IEditorInput;

import org.eclipse.ui.IEditorPart;

import org.eclipse.ui.IWorkbenchActionConstants;

import org.eclipse.ui.IWorkbenchPart;

import eu.etaxonomy.cdm.model.description.TaxonDescription;

import eu.etaxonomy.taxeditor.bulkeditor.BulkEditor;

import eu.etaxonomy.taxeditor.editor.EditorUtil;

import eu.etaxonomy.taxeditor.editor.MultiPageTaxonEditor;

import eu.etaxonomy.taxeditor.editor.definedterm.DefinedTermEditor;

import eu.etaxonomy.taxeditor.editor.key.AbstractGraphKeyEditor;

import eu.etaxonomy.taxeditor.editor.view.descriptive.DescriptionElementDragListener;

import eu.etaxonomy.taxeditor.editor.view.descriptive.DescriptionElementDropAdapter;

import eu.etaxonomy.taxeditor.editor.view.descriptive.DescriptionElementTransfer;

import eu.etaxonomy.taxeditor.editor.view.descriptive.DescriptiveViewPart;

import eu.etaxonomy.taxeditor.model.FeatureNodeContainerTree;

import eu.etaxonomy.taxeditor.model.IPartContentHasDetails;

import eu.etaxonomy.taxeditor.model.IPartContentHasSupplementalData;

import eu.etaxonomy.taxeditor.model.ImageResources;

/**

 * <p>UsesViewPart Class.</p>

 * @author a.theys	

 * @created mar 13, 2012

 * @version 1.0

 */

public class UsesViewPart extends DescriptiveViewPart implements IPartContentHasDetails, IPartContentHasSupplementalData {

	/** Constant <code>ID="eu.etaxonomy.taxeditor.editor.view.desc"{trunked}</code> */

	public static final String ID = "eu.etaxonomy.taxeditor.editor.view.uses";

	private TreeViewer viewer;

	private Map<TaxonDescription, FeatureNodeContainerTree> featureNodeContainerCache = new HashMap<TaxonDescription, FeatureNodeContainerTree>();

	private ToggleDescriptionAction showAllElementsAction;

	private ToggleDescriptionAction hideAllElementsAction;

	private int dndOperations = DND.DROP_COPY | DND.DROP_MOVE;

	/** {@inheritDoc} */

	@Override

	public void createViewer(Composite parent) {

		viewer = new TreeViewer(new Tree(parent, SWT.MULTI | SWT.H_SCROLL

				| SWT.V_SCROLL | SWT.FULL_SELECTION));

		viewer.setContentProvider(new UsesContentProvider(featureNodeContainerCache));

		viewer.setLabelProvider(new UsesLabelProvider());

		viewer.setAutoExpandLevel(2);

		Transfer[] transfers = new Transfer[] { DescriptionElementTransfer.getInstance() };

		viewer.addDragSupport(dndOperations, transfers, new DescriptionElementDragListener(

				this));

		viewer.addDropSupport(dndOperations, transfers,

				new DescriptionElementDropAdapter(viewer));

		getSite().setSelectionProvider(viewer);

		showAllElementsAction = new ToggleDescriptionAction(false);		

		hideAllElementsAction = new ToggleDescriptionAction(true);

		createMenu();

		createToolbar();

	}

	private void createToolbar() {

		IToolBarManager toolBarManager = getViewSite().getActionBars().getToolBarManager();

		toolBarManager.add(showAllElementsAction);

		toolBarManager.add(hideAllElementsAction);

	}

	@Override

	public void selectionChanged(IWorkbenchPart part, ISelection selection) {

		if(EditorUtil.getActiveEditor() == null){

			showEmptyPage();

			return;

		}

		if(part instanceof BulkEditor){

			showEmptyPage();

			return;

		}

		if(part instanceof AbstractGraphKeyEditor){

			showEmptyPage();

			return;

		}

		if(part instanceof DefinedTermEditor){

			showEmptyPage();

			return;

		}

		if(part instanceof MultiPageTaxonEditor){

			if(! part.equals(this.part)){

				IEditorInput input = ((IEditorPart) part).getEditorInput();

				featureNodeContainerCache.clear();

				showViewer(part, new StructuredSelection(input));

			}

			showViewer();

		}

	}

	private void createMenu(){

		MenuManager menuManager = new MenuManager();

		menuManager.add(new GroupMarker(IWorkbenchActionConstants.MB_ADDITIONS));

		getSite().registerContextMenu(menuManager, viewer);

		// FIXME for some reason this is not working

		menuManager.add(showAllElementsAction);

		menuManager.add(hideAllElementsAction);

		Control control = viewer.getControl();

		Menu menu = menuManager.createContextMenu(control);

		control.setMenu(menu);	

	}

	private class ToggleDescriptionAction extends Action{

		private boolean expanded;

		public ToggleDescriptionAction(boolean expand){

			super(null, Action.AS_PUSH_BUTTON);

			expanded = expand;

			setImageAndTooltip();

		}

		private void setImageAndTooltip(){

			setImageDescriptor(new ImageDescriptor() {

				@Override

				public ImageData getImageData() {

					setText(expanded ? "Collapse All" : "Expand All");

					String resource = expanded ? ImageResources.COLLAPSE_ALL : ImageResources.EXPAND_ALL;

					return ImageResources.getImage(resource).getImageData();

				}

			});

			String toolTipText = expanded ? "Collapse all" : "Show all descriptive data";

			setToolTipText(toolTipText);

		}

		@Override

		public void run() {

			if(expanded){

				viewer.collapseAll();

			}else{

				viewer.expandAll();

			}

			setImageAndTooltip();

		}

	}

}