EDIT

    <elements xsi:type="basic:PartDescriptor" xmi:id="_R7vxEECaEeeL5JDzMOYK6g" elementId="eu.etaxonomy.taxeditor.editor.workingSet.CharacterEditor" label="Character Editor" closeable="true" dirtyable="true" contributionURI="bundleclass://eu.etaxonomy.taxeditor.editor/eu.etaxonomy.taxeditor.editor.workingSet.CharacterEditor"/>

      <parameters xmi:id="_wJkmoEalEeeXMc6kSYO7Xg" elementId="eu.etaxonomy.taxeditor.editor.parameter.0" name="eu.etaxonomy.taxeditor.workbench.commandparameter.partName" value="eu.etaxonomy.taxeditor.editor.workingSet.CharacterEditor"/>

// $Id$

/**

* Copyright (C) 2017 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.workingSet;

import java.util.Collections;

import java.util.UUID;

import javax.annotation.PostConstruct;

import javax.annotation.PreDestroy;

import javax.inject.Named;

import org.eclipse.e4.ui.di.Focus;

import org.eclipse.e4.ui.services.IServiceConstants;

import org.eclipse.jface.viewers.ISelection;

import org.eclipse.jface.viewers.TreeSelection;

import org.eclipse.jface.viewers.TreeViewer;

import org.eclipse.swt.SWT;

import org.eclipse.swt.custom.SashForm;

import org.eclipse.swt.dnd.DND;

import org.eclipse.swt.dnd.Transfer;

import org.eclipse.swt.events.SelectionAdapter;

import org.eclipse.swt.events.SelectionEvent;

import org.eclipse.swt.layout.GridData;

import org.eclipse.swt.layout.GridLayout;

import org.eclipse.swt.widgets.Button;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Display;

import org.eclipse.swt.widgets.Label;

import org.eclipse.swt.widgets.Shell;

import org.eclipse.swt.widgets.Tree;

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

import eu.etaxonomy.cdm.api.service.IFeatureTreeService;

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

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

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

import eu.etaxonomy.taxeditor.featuretree.FeatureNodeTransfer;

import eu.etaxonomy.taxeditor.featuretree.FeatureTreeContentProvider;

import eu.etaxonomy.taxeditor.featuretree.FeatureTreeLabelProvider;

import eu.etaxonomy.taxeditor.featuretree.e4.FeatureTreeEditor;

import eu.etaxonomy.taxeditor.model.MessagingUtils;

import eu.etaxonomy.taxeditor.store.CdmStore;

/**

 * @author pplitzner

 * @date 24.05.2017

 *

 */

public class CharacterEditor {

    private TreeViewer treeViewerCharacters;

    private TreeViewer treeViewerProperties;

    private TreeViewer treeViewerStructures;

    private FeatureTreeEditor editor;

    private final FormToolkit formToolkit = new FormToolkit(Display.getDefault());

    private Button btnAddCharacter;

    public CharacterEditor() {

    }

    /**

     * Create contents of the view part.

     */

    @PostConstruct

    public void createControls(Composite parent, @Named(IServiceConstants.ACTIVE_SHELL)Shell shell) {

        parent.setLayout(new GridLayout(1, false));

        SashForm sashForm = new SashForm(parent, SWT.NONE);

        sashForm.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1));

        formToolkit.adapt(sashForm);

        formToolkit.paintBordersFor(sashForm);

        Composite composite = new Composite(sashForm, SWT.NONE);

        formToolkit.adapt(composite);

        formToolkit.paintBordersFor(composite);

        composite.setLayout(new GridLayout(1, false));

        Label lblNewLabel = new Label(composite, SWT.NONE);

        lblNewLabel.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, true, false, 1, 1));

        formToolkit.adapt(lblNewLabel, true, true);

        lblNewLabel.setText("Structures");

        treeViewerStructures = new TreeViewer(composite, SWT.BORDER);

        Tree tree = treeViewerStructures.getTree();

        tree.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1));

        Composite composite_1 = new Composite(sashForm, SWT.NONE);

        formToolkit.adapt(composite_1);

        formToolkit.paintBordersFor(composite_1);

        composite_1.setLayout(new GridLayout(1, false));

        Label lblNewLabel_1 = new Label(composite_1, SWT.NONE);

        lblNewLabel_1.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, true, false, 1, 1));

        formToolkit.adapt(lblNewLabel_1, true, true);

        lblNewLabel_1.setText("Properties");

        treeViewerProperties = new TreeViewer(composite_1, SWT.BORDER);

        Tree tree_1 = treeViewerProperties.getTree();

        tree_1.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1));

        Composite composite_2 = new Composite(sashForm, SWT.NONE);

        formToolkit.adapt(composite_2);

        formToolkit.paintBordersFor(composite_2);

        composite_2.setLayout(new GridLayout(1, false));

        btnAddCharacter = new Button(composite_2, SWT.NONE);

        btnAddCharacter.setText(">>");

        btnAddCharacter.setLayoutData(new GridData(SWT.CENTER, SWT.CENTER, true, true, 1, 1));

        formToolkit.adapt(btnAddCharacter, true, true);

        Composite composite_3 = new Composite(sashForm, SWT.NONE);

        formToolkit.adapt(composite_3);

        formToolkit.paintBordersFor(composite_3);

        composite_3.setLayout(new GridLayout(1, false));

        editor = new FeatureTreeEditor(shell);

        editor.createControl(composite_3, shell);

        //                treeViewerCharacters = new TreeViewer(sashForm, SWT.BORDER);

        sashForm.setWeights(new int[] {3, 3, 1, 3});

        init();

    }

    private void init(){

        int dndOperations = DND.DROP_COPY | DND.DROP_MOVE;

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

        FeatureTree structureFeatureTree = CdmStore.getService(IFeatureTreeService.class).load(UUID.fromString("3a953dd1-2b5f-482f-9a33-664ee7ef6c68"));

        treeViewerStructures.setContentProvider(new FeatureTreeContentProvider());

        treeViewerStructures.setLabelProvider(new FeatureTreeLabelProvider());

        treeViewerStructures.setInput(structureFeatureTree);

        FeatureTree propertiesFeatureTree = CdmStore.getService(IFeatureTreeService.class).load(UUID.fromString("e283bbf5-bda3-449d-98de-3601ac8a8bbd"));

        treeViewerProperties.setContentProvider(new FeatureTreeContentProvider());

        treeViewerProperties.setLabelProvider(new FeatureTreeLabelProvider());

        treeViewerProperties.addDragSupport(dndOperations, transfers, new CharacterDragListener(treeViewerStructures, treeViewerProperties));

        treeViewerProperties.setInput(propertiesFeatureTree);

        btnAddCharacter.addSelectionListener(new SelectionAdapter() {

            /**

             * {@inheritDoc}

             */

            @Override

            public void widgetSelected(SelectionEvent e) {

                ISelection structureTreeSelection = treeViewerStructures.getSelection();

                ISelection propertyTreeSelection = treeViewerProperties.getSelection();

                if(structureTreeSelection==null || propertyTreeSelection==null || editor.getSelectedFeatureTree()==null){

                    MessagingUtils.warningDialog("Cannot perform action", CharacterEditor.this,

                            "You have to select a structure, a property and a feature tree to perform this action.");

                    return;

                }

                FeatureNode structureNode = (FeatureNode) ((TreeSelection)structureTreeSelection).getFirstElement();

                FeatureNode propertyNode = (FeatureNode) ((TreeSelection)propertyTreeSelection).getFirstElement();

                String label = structureNode.getFeature().toString()+" "+propertyNode.getFeature().toString();

                Character character = Character.NewInstance(structureNode, propertyNode, null, label, label);

                //TODO session handling

//                CdmStore.getService(ITermService.class).save(character);

                editor.addFeatures(Collections.singleton(character));

            }

        });

//        treeViewerCharacters.setContentProvider(new FeatureTreeContentProvider());

//        treeViewerCharacters.setLabelProvider(new FeatureTreeLabelProvider());

//        treeViewerCharacters.addDropSupport(dndOperations, transfers, new CharacterDropAdapter(treeViewerCharacters));

    }

    @PreDestroy

    public void dispose() {

    }

    @Focus

    public void setFocus() {

    }

    public TreeViewer getTreeViewerCharacters() {

        return treeViewerCharacters;

    }

    public TreeViewer getTreeViewerProperties() {

        return treeViewerProperties;

    }

    public TreeViewer getTreeViewerStructures() {

        return treeViewerStructures;

    }

}

    public FeatureTree getSelectedFeatureTree(){

        return this.featureTree;

    }

	/**

     * @param additionalFeatures

     */

    public void addFeatures(Collection<Feature> additionalFeatures) {

        IStructuredSelection selection = (IStructuredSelection) viewer.getSelection();

        FeatureNode parent = (FeatureNode) (selection.getFirstElement() != null ? selection.getFirstElement()

                : ((FeatureTree) viewer.getInput()).getRoot());

        for (Feature feature : additionalFeatures) {

            FeatureNode child = FeatureNode.NewInstance(feature);

            //TODO session handling

//            CdmStore.getService(IFeatureNodeService.class).merge(child, true);

            parent.addChild(child);

        }

        //TODO session handling

//        setDirty(true);

        viewer.refresh();

    }

            if (dialog.open() == IStatus.OK) {

                Collection<Feature> additionalFeatures = wizard.getAdditionalFeatures();

                addFeatures(additionalFeatures);

            }

        }