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/**
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* Copyright (C) 2007 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.taxeditor.featuretree.e4;
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import java.util.Collection;
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import javax.annotation.PostConstruct;
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import javax.inject.Inject;
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import javax.inject.Named;
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import org.eclipse.core.runtime.IStatus;
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import org.eclipse.e4.ui.di.Persist;
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import org.eclipse.e4.ui.model.application.ui.MDirtyable;
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import org.eclipse.e4.ui.services.IServiceConstants;
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import org.eclipse.jface.viewers.ISelectionChangedListener;
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import org.eclipse.jface.viewers.IStructuredSelection;
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import org.eclipse.jface.viewers.SelectionChangedEvent;
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import org.eclipse.jface.viewers.TreeViewer;
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import org.eclipse.jface.viewers.Viewer;
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import org.eclipse.jface.viewers.ViewerDropAdapter;
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import org.eclipse.jface.wizard.WizardDialog;
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import org.eclipse.swt.SWT;
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import org.eclipse.swt.dnd.DND;
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import org.eclipse.swt.dnd.DragSourceAdapter;
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import org.eclipse.swt.dnd.DragSourceEvent;
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import org.eclipse.swt.dnd.Transfer;
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import org.eclipse.swt.dnd.TransferData;
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import org.eclipse.swt.events.ModifyEvent;
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import org.eclipse.swt.events.ModifyListener;
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import org.eclipse.swt.events.SelectionAdapter;
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import org.eclipse.swt.events.SelectionEvent;
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import org.eclipse.swt.events.SelectionListener;
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import org.eclipse.swt.layout.GridData;
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import org.eclipse.swt.layout.GridLayout;
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import org.eclipse.swt.widgets.Button;
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import org.eclipse.swt.widgets.Composite;
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import org.eclipse.swt.widgets.Label;
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import org.eclipse.swt.widgets.Shell;
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import org.eclipse.swt.widgets.Text;
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import org.eclipse.swt.widgets.Tree;
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import eu.etaxonomy.cdm.api.conversation.ConversationHolder;
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import eu.etaxonomy.cdm.api.service.IFeatureNodeService;
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import eu.etaxonomy.cdm.api.service.IFeatureTreeService;
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import eu.etaxonomy.cdm.api.service.config.FeatureNodeDeletionConfigurator;
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import eu.etaxonomy.cdm.hibernate.HibernateProxyHelper;
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import eu.etaxonomy.cdm.model.description.Feature;
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import eu.etaxonomy.cdm.model.description.FeatureNode;
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import eu.etaxonomy.cdm.model.description.FeatureTree;
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import eu.etaxonomy.taxeditor.featuretree.AvailableFeaturesWizard;
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import eu.etaxonomy.taxeditor.featuretree.FeatureNodeTransfer;
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import eu.etaxonomy.taxeditor.featuretree.FeatureTreeContentProvider;
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import eu.etaxonomy.taxeditor.featuretree.FeatureTreeLabelProvider;
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import eu.etaxonomy.taxeditor.model.ImageResources;
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import eu.etaxonomy.taxeditor.model.MessagingUtils;
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import eu.etaxonomy.taxeditor.store.CdmStore;
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import eu.etaxonomy.taxeditor.ui.dialog.selection.FeatureTreeSelectionDialog;
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/**
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*
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* @author pplitzner
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* @date 06.06.2017
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*
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*/
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public class FeatureTreeEditor implements
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ModifyListener, ISelectionChangedListener {
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private TreeViewer viewer;
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private Label label_title;
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private Button button_add;
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private Button button_remove;
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private FeatureTree featureTree;
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private Text text_title;
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private Button btnOpenFeatureTree;
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private ConversationHolder conversation;
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@Inject
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private MDirtyable dirty;
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private Shell shell;
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@Inject
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public FeatureTreeEditor(@Named(IServiceConstants.ACTIVE_SHELL)Shell shell) {
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this.shell = shell;
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if(conversation==null){
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conversation = CdmStore.createConversation();
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}
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}
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/** {@inheritDoc} */
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@PostConstruct
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public void createControl(Composite parent, @Named(IServiceConstants.ACTIVE_SHELL)Shell shell) {
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parent.setLayout(new GridLayout());
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Composite composite = new Composite(parent, SWT.NULL);
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composite.setLayout(new GridLayout());
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composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
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Composite composite_treeTitle = new Composite(composite, SWT.NULL);
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composite_treeTitle.setLayoutData(new GridData(SWT.FILL, SWT.TOP, true,
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false));
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composite_treeTitle.setLayout(new GridLayout(3, false));
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label_title = new Label(composite_treeTitle, SWT.NULL);
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label_title.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, false, false, 1, 1));
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label_title.setText("Title");
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text_title = new Text(composite_treeTitle, SWT.BORDER);
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text_title.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 1, 1));
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btnOpenFeatureTree = new Button(composite_treeTitle, SWT.NONE);
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btnOpenFeatureTree.setToolTipText("Open Tree");
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btnOpenFeatureTree.setImage(ImageResources.getImage(ImageResources.BROWSE_ICON));
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Composite composite_treeContent = new Composite(composite, SWT.NULL);
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composite_treeContent.setLayoutData(new GridData(SWT.FILL, SWT.FILL,
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true, true));
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composite_treeContent.setLayout(new GridLayout(2, false));
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viewer = new TreeViewer(composite_treeContent);
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Tree tree = viewer.getTree();
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tree.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1));
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viewer.getControl().setLayoutData(
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new GridData(SWT.FILL, SWT.FILL, true, true));
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Composite composite_buttons = new Composite(composite_treeContent,
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SWT.NULL);
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composite_buttons.setLayoutData(new GridData(SWT.LEFT, SWT.TOP, false,
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false));
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composite_buttons.setLayout(new GridLayout());
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button_add = new Button(composite_buttons, SWT.PUSH);
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button_add.setToolTipText("Add a feature to this feature tree.");
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button_add.setImage(ImageResources.getImage(ImageResources.ADD_EDIT));
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button_remove = new Button(composite_buttons, SWT.PUSH);
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button_remove.setToolTipText("Remove a feature from this feature tree.");
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button_remove.setImage(ImageResources.getImage(ImageResources.TRASH_ICON));
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init(shell);
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}
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private void setDirty(boolean isDirty){
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this.dirty.setDirty(isDirty);
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}
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private void init(Shell shell) {
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viewer.setContentProvider(new FeatureTreeContentProvider());
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viewer.setLabelProvider(new FeatureTreeLabelProvider());
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int ops = DND.DROP_COPY | DND.DROP_MOVE;
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Transfer[] transfers = new Transfer[] { FeatureNodeTransfer
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.getInstance() };
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viewer.addDragSupport(ops, transfers, new FeatureNodeDragListener(
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viewer));
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viewer.addDropSupport(ops, transfers,
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new FeatureNodeDropAdapter(viewer));
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viewer.addSelectionChangedListener(this);
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button_add.addSelectionListener(new AddButtonListener());
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button_remove.addSelectionListener(new RemoveSelectionListener());
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btnOpenFeatureTree.addSelectionListener(new SelectionListener() {
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@Override
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public void widgetSelected(SelectionEvent e) {
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FeatureTree tree = FeatureTreeSelectionDialog.select(shell, conversation, null);
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if(tree!=null){
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setSelectedTree(tree);
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}
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}
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@Override
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public void widgetDefaultSelected(SelectionEvent e) {
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}
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});
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}
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public void setSelectedTree(FeatureTree featureTree) {
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this.featureTree = HibernateProxyHelper.deproxy(featureTree, FeatureTree.class);
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this.featureTree.setRoot(HibernateProxyHelper.deproxy(featureTree.getRoot(), FeatureNode.class));
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viewer.setInput(featureTree);
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text_title.removeModifyListener(this);
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text_title.setText(featureTree.getTitleCache());
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text_title.addModifyListener(this);
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}
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/** {@inheritDoc} */
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@Override
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public void modifyText(ModifyEvent e) {
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featureTree.setTitleCache(text_title.getText(), true);
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setDirty(true);
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}
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/** {@inheritDoc} */
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@Override
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public void selectionChanged(SelectionChangedEvent event) {
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IStructuredSelection selection = (IStructuredSelection) event
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.getSelection();
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button_add.setEnabled(selection.size() <= 1);
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button_remove.setEnabled(selection.size() > 0);
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}
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@Persist
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public void save(){
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CdmStore.getService(IFeatureTreeService.class).saveOrUpdate(featureTree);
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setDirty(false);
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}
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private class AddButtonListener extends SelectionAdapter {
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@Override
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public void widgetSelected(SelectionEvent e) {
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AvailableFeaturesWizard wizard = new AvailableFeaturesWizard(
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featureTree);
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WizardDialog dialog = new WizardDialog(shell, wizard);
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if (dialog.open() == IStatus.OK) {
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IStructuredSelection selection = (IStructuredSelection) viewer
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.getSelection();
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FeatureNode parent = (FeatureNode) (selection.getFirstElement() != null ? selection
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.getFirstElement() : ((FeatureTree) viewer.getInput())
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.getRoot());
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Collection<Feature> additionalFeatures = wizard
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.getAdditionalFeatures();
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for (Feature feature : additionalFeatures) {
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FeatureNode child = FeatureNode.NewInstance(feature);
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CdmStore.getService(IFeatureNodeService.class).merge(child, true);
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parent.addChild(child);
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}
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setDirty(true);
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viewer.refresh();
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}
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}
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}
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private class RemoveSelectionListener extends SelectionAdapter {
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@Override
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public void widgetSelected(SelectionEvent e) {
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IStructuredSelection selection = (IStructuredSelection) viewer
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.getSelection();
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for (Object selectedObject : selection.toArray()) {
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FeatureNode featureNode = (FeatureNode) selectedObject;
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FeatureNode parent = featureNode.getParent();
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parent.removeChild(featureNode);
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CdmStore.getService(IFeatureNodeService.class).deleteFeatureNode(featureNode.getUuid(), new FeatureNodeDeletionConfigurator());
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}
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setDirty(true);
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viewer.refresh();
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}
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}
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private class FeatureNodeDragListener extends DragSourceAdapter {
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private final TreeViewer viewer;
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public FeatureNodeDragListener(TreeViewer viewer) {
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this.viewer = viewer;
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}
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/**
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* Method declared on DragSourceListener
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*/
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@Override
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public void dragFinished(DragSourceEvent event) {
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if (!event.doit) {
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return;
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}
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// if the featureNode was moved, remove it from the source viewer
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if (event.detail == DND.DROP_MOVE) {
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IStructuredSelection selection = (IStructuredSelection) viewer
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.getSelection();
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viewer.refresh();
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}
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}
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/**
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* Method declared on DragSourceListener
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*/
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@Override
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public void dragSetData(DragSourceEvent event) {
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IStructuredSelection selection = (IStructuredSelection) viewer
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.getSelection();
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FeatureNode[] featureNodes = (FeatureNode[]) selection.toList()
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.toArray(new FeatureNode[selection.size()]);
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if (FeatureNodeTransfer.getInstance().isSupportedType(
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event.dataType)) {
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event.data = featureNodes;
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}
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}
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/**
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* Method declared on DragSourceListener
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*/
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@Override
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public void dragStart(DragSourceEvent event) {
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event.doit = !viewer.getSelection().isEmpty();
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}
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}
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private class FeatureNodeDropAdapter extends ViewerDropAdapter {
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protected FeatureNodeDropAdapter(Viewer viewer) {
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super(viewer);
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}
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@Override
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public boolean performDrop(Object data) {
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FeatureNode target = (FeatureNode) getCurrentTarget();
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int position = 0;
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if (target != null) {
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int location = getCurrentLocation();
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FeatureNode parent = target.getParent();
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if (location == LOCATION_BEFORE) {
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position = Math.max(0, parent.getIndex(target) - 1);
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target = parent;
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}
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if (location == LOCATION_AFTER) {
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position = parent.getIndex(target);
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target = parent;
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}
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}
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// set target to root node if there is no target specified
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if (target == null) {
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FeatureTree featureTree = (FeatureTree) getViewer().getInput();
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target = featureTree.getRoot();
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}
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Object[] droppedObjects = (Object[]) data;
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TreeViewer viewer = (TreeViewer) getViewer();
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// cannot drop a feature node onto itself
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for (Object droppedObject : droppedObjects) {
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if (droppedObject == null) {
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MessagingUtils.warningDialog(
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"Operation not supported yet",
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this,
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"We are currently unable to change the order of freshly created "
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+ "feature trees nodes. Please close and reopen the dialog to change the order of features.");
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return false;
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}
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if (droppedObject.equals(target)) {
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return false;
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}
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}
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for (Object droppedObject : droppedObjects) {
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FeatureNode droppedNode = (FeatureNode) droppedObject;
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target.addChild(droppedNode, position);
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viewer.add(target, droppedNode);
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viewer.reveal(droppedNode);
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}
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return true;
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}
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@Override
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public boolean validateDrop(Object target, int operation,
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TransferData transferData) {
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return FeatureNodeTransfer.getInstance().isSupportedType(
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transferData);
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}
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}
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}
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