plugins/org.eclipse.uml2.uml.editor/src/org/eclipse/uml2/uml/editor/dialogs/ChoicesDialog.java - uml2/org.eclipse.uml2 - Git at Google

 /*
  * Copyright (c) 2002, 2014 IBM Corporation, CEA, and others.
  * All rights reserved.   This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *   IBM - initial API and implementation
  *   Christian W. Damus (CEA) - 326915, 268444
  *
  */
 package org.eclipse.uml2.uml.editor.dialogs;

 import java.util.Collection;
 import java.util.Collections;
 import java.util.Iterator;
 import java.util.List;
 import java.util.ListIterator;

 import org.eclipse.emf.common.notify.AdapterFactory;
 import org.eclipse.emf.common.notify.impl.AdapterFactoryImpl;
 import org.eclipse.emf.common.util.BasicEList;
 import org.eclipse.emf.common.util.EList;
 import org.eclipse.emf.edit.provider.ComposedAdapterFactory;
 import org.eclipse.emf.edit.provider.ItemProvider;
 import org.eclipse.emf.edit.ui.EMFEditUIPlugin;
 import org.eclipse.emf.edit.ui.provider.AdapterFactoryContentProvider;
 import org.eclipse.emf.edit.ui.provider.ExtendedImageRegistry;
 import org.eclipse.jface.dialogs.Dialog;
 import org.eclipse.jface.viewers.AbstractTreeViewer;
 import org.eclipse.jface.viewers.CellLabelProvider;
 import org.eclipse.jface.viewers.DoubleClickEvent;
 import org.eclipse.jface.viewers.IContentProvider;
 import org.eclipse.jface.viewers.IDoubleClickListener;
 import org.eclipse.jface.viewers.ILabelProvider;
 import org.eclipse.jface.viewers.ISelectionChangedListener;
 import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.jface.viewers.SelectionChangedEvent;
 import org.eclipse.jface.viewers.StructuredSelection;
 import org.eclipse.jface.viewers.TableViewer;
 import org.eclipse.jface.viewers.TableViewerColumn;
 import org.eclipse.jface.viewers.Viewer;
 import org.eclipse.jface.viewers.ViewerFilter;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.ControlAdapter;
 import org.eclipse.swt.events.ControlEvent;
 import org.eclipse.swt.events.ModifyEvent;
 import org.eclipse.swt.events.ModifyListener;
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.layout.FillLayout;
 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.Control;
 import org.eclipse.swt.widgets.Display;
 import org.eclipse.swt.widgets.Group;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.swt.widgets.Table;
 import org.eclipse.swt.widgets.Text;
 import org.eclipse.ui.dialogs.PatternFilter;
 import org.eclipse.uml2.uml.editor.UMLEditorPlugin;

 /**
  * A two-pane dialog, adapted from FeatureEditorDialog in EMF, that lets the
  * user choose elements from the left-side list to add to the right-side list.
  * The elements on the right-side list may optionally be ordered by moving them
  * up and down.
  *
  * The dialog delegates a variety of decisions to a
  * {@linkplain IChoicesDialogDelegate delegate}.
  *
  * @since 5.0
  *
  * @see IChoicesDialogDelegate
  */
 public class ChoicesDialog<T>
 		extends Dialog {

 	protected IContentProvider contentProvider;

 	protected Object object;

 	protected String displayName;

 	protected ItemProvider values;

 	protected List<T> choiceOfValues;

 	protected TableViewer choiceTableViewer;

 	protected TableViewer valuesTableViewer;

 	protected EList<T> result;

 	protected final IChoicesDialogDelegate<T> delegate;

 	public ChoicesDialog(Shell parent, Object object, String displayName,
 			IChoicesDialogDelegate<T> delegate) {

 		super(parent);

 		setShellStyle(getShellStyle() | SWT.RESIZE | SWT.MAX);
 		this.object = object;
 		this.displayName = displayName;
 		this.delegate = delegate;

 		if (delegate instanceof AbstractChoicesDialogDelegate<?>) {
 			((AbstractChoicesDialogDelegate<T>) delegate).setDialog(this);
 		}

 		AdapterFactory adapterFactory = new ComposedAdapterFactory(
 			Collections.<AdapterFactory> emptyList());
 		values = new ItemProvider(adapterFactory, Collections.EMPTY_LIST);
 		contentProvider = new AdapterFactoryContentProvider(adapterFactory);

 		updateChoiceOfValues();
 	}

 	@Override
 	protected void configureShell(Shell shell) {
 		super.configureShell(shell);

 		ILabelProvider labelProvider = delegate.getLabelProvider();
 		shell.setText(UMLEditorPlugin.INSTANCE.getString(
 			"_UI_ChoicesDialog_title",
 			new Object[]{displayName, labelProvider.getText(object)}));
 		shell.setImage(labelProvider.getImage(object));
 	}

 	/**
 	 * Updates me to reflect a change in the choice of values provided by my
 	 * delegate.
 	 */
 	public void updateChoiceOfValues() {
 		choiceOfValues = new java.util.ArrayList<T>(
 			delegate.getChoiceOfValues());
 		if (values != null) {
 			// anything that's no longer a choice must be removed
 			values.getChildren().retainAll(choiceOfValues);
 		}

 		if (choiceTableViewer != null) {
 			choiceTableViewer.setInput(new ItemProvider(choiceOfValues));
 		}
 		if (valuesTableViewer != null) {
 			valuesTableViewer.refresh();
 		}
 	}

 	@Override
 	protected Control createDialogArea(Composite parent) {
 		Composite contents = (Composite) super.createDialogArea(parent);

 		GridLayout contentsGridLayout = (GridLayout) contents.getLayout();
 		contentsGridLayout.numColumns = 3;

 		GridData contentsGridData = (GridData) contents.getLayoutData();
 		contentsGridData.horizontalAlignment = SWT.FILL;
 		contentsGridData.verticalAlignment = SWT.FILL;

 		Text patternText = null;

 		Group filterGroupComposite = new Group(contents, SWT.NONE);
 		filterGroupComposite.setText(EMFEditUIPlugin.INSTANCE
 			.getString("_UI_Choices_pattern_group"));
 		filterGroupComposite.setLayout(new GridLayout(2, false));
 		filterGroupComposite.setLayoutData(new GridData(SWT.FILL, SWT.DEFAULT,
 			true, false, 3, 1));

 		Label label = new Label(filterGroupComposite, SWT.NONE);
 		label.setText(EMFEditUIPlugin.INSTANCE
 			.getString("_UI_Choices_pattern_label"));

 		patternText = new Text(filterGroupComposite, SWT.BORDER | SWT.SEARCH);
 		patternText.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

 		Composite choiceComposite = new Composite(contents, SWT.NONE);
 		{
 			GridData data = new GridData(SWT.FILL, SWT.FILL, true, true);
 			data.horizontalAlignment = SWT.END;
 			choiceComposite.setLayoutData(data);

 			GridLayout layout = new GridLayout();
 			data.horizontalAlignment = SWT.FILL;
 			layout.marginHeight = 0;
 			layout.marginWidth = 0;
 			layout.numColumns = 1;
 			choiceComposite.setLayout(layout);
 		}

 		Label choiceLabel = new Label(choiceComposite, SWT.NONE);
 		choiceLabel.setText(delegate.getChoicesLabelText());
 		GridData choiceLabelGridData = new GridData();
 		choiceLabelGridData.verticalAlignment = SWT.FILL;
 		choiceLabelGridData.horizontalAlignment = SWT.FILL;
 		choiceLabel.setLayoutData(choiceLabelGridData);

 		final Table choiceTable = new Table(choiceComposite, SWT.MULTI
 			| SWT.BORDER);
 		GridData choiceTableGridData = new GridData();
 		choiceTableGridData.widthHint = Display.getCurrent().getBounds().width / 5;
 		choiceTableGridData.heightHint = Display.getCurrent().getBounds().height / 3;
 		choiceTableGridData.verticalAlignment = SWT.FILL;
 		choiceTableGridData.horizontalAlignment = SWT.FILL;
 		choiceTableGridData.grabExcessHorizontalSpace = true;
 		choiceTableGridData.grabExcessVerticalSpace = true;
 		choiceTable.setLayoutData(choiceTableGridData);

 		choiceTableViewer = new TableViewer(choiceTable);
 		choiceTableViewer.setContentProvider(new AdapterFactoryContentProvider(
 			new AdapterFactoryImpl()));
 		configureLabelProvider(choiceTableViewer);
 		final PatternFilter filter = new PatternFilter() {

 			@Override
 			protected boolean isParentMatch(Viewer viewer, Object element) {
 				return viewer instanceof AbstractTreeViewer
 					&& super.isParentMatch(viewer, element);
 			}
 		};
 		choiceTableViewer.addFilter(filter);
 		if (patternText != null) {
 			patternText.addModifyListener(new ModifyListener() {

 				public void modifyText(ModifyEvent e) {
 					filter.setPattern(((Text) e.widget).getText());
 					choiceTableViewer.refresh();
 				}
 			});
 		}

 		// enforce uniqueness
 		choiceTableViewer.addFilter(new ViewerFilter() {

 			@Override
 			public boolean select(Viewer viewer, Object parentElement,
 					Object element) {
 				return !values.getChildren().contains(element);
 			}
 		});
 		choiceTableViewer.setInput(new ItemProvider(choiceOfValues));

 		Composite controlButtons = new Composite(contents, SWT.NONE);
 		GridData controlButtonsGridData = new GridData();
 		controlButtonsGridData.verticalAlignment = SWT.FILL;
 		controlButtonsGridData.horizontalAlignment = SWT.FILL;
 		controlButtons.setLayoutData(controlButtonsGridData);

 		GridLayout controlsButtonGridLayout = new GridLayout();
 		controlButtons.setLayout(controlsButtonGridLayout);

 		new Label(controlButtons, SWT.NONE);

 		final Button addButton = new Button(controlButtons, SWT.PUSH);
 		addButton.setText(delegate.getAddButtonText());
 		addButton.setImage(ExtendedImageRegistry.getInstance().getImage(
 			UMLEditorPlugin.INSTANCE.getImage("full/etool16/ArrowRight.gif"))); //$NON-NLS-1$
 		GridData addButtonGridData = new GridData();
 		addButtonGridData.verticalAlignment = SWT.FILL;
 		addButtonGridData.horizontalAlignment = SWT.FILL;
 		addButton.setLayoutData(addButtonGridData);

 		final Button removeButton = new Button(controlButtons, SWT.PUSH);
 		removeButton.setText(delegate.getRemoveButtonText());
 		removeButton.setImage(ExtendedImageRegistry.getInstance().getImage(
 			UMLEditorPlugin.INSTANCE.getImage("full/etool16/ArrowLeft.gif"))); //$NON-NLS-1$
 		GridData removeButtonGridData = new GridData();
 		removeButtonGridData.verticalAlignment = SWT.FILL;
 		removeButtonGridData.horizontalAlignment = SWT.FILL;
 		removeButton.setLayoutData(removeButtonGridData);

 		Label spaceLabel = new Label(controlButtons, SWT.NONE);
 		GridData spaceLabelGridData = new GridData();
 		spaceLabelGridData.verticalSpan = 2;
 		spaceLabel.setLayoutData(spaceLabelGridData);

 		final boolean allowReorder = delegate.allowsReordering();
 		final Button upButton = allowReorder
 			? new Button(controlButtons, SWT.PUSH)
 			: null;
 		if (allowReorder) {
 			upButton
 				.setText(EMFEditUIPlugin.INSTANCE.getString("_UI_Up_label"));
 			upButton.setImage(ExtendedImageRegistry.getInstance().getImage(
 				UMLEditorPlugin.INSTANCE.getImage("full/etool16/ArrowUp.gif"))); //$NON-NLS-1$
 			GridData upButtonGridData = new GridData();
 			upButtonGridData.verticalAlignment = SWT.FILL;
 			upButtonGridData.horizontalAlignment = SWT.FILL;
 			upButton.setLayoutData(upButtonGridData);
 		}

 		final Button downButton = allowReorder
 			? new Button(controlButtons, SWT.PUSH)
 			: null;
 		if (allowReorder) {
 			downButton.setText(EMFEditUIPlugin.INSTANCE
 				.getString("_UI_Down_label"));
 			downButton.setImage(ExtendedImageRegistry.getInstance()
 				.getImage(
 					UMLEditorPlugin.INSTANCE
 						.getImage("full/etool16/ArrowDown.gif"))); //$NON-NLS-1$
 			GridData downButtonGridData = new GridData();
 			downButtonGridData.verticalAlignment = SWT.FILL;
 			downButtonGridData.horizontalAlignment = SWT.FILL;
 			downButton.setLayoutData(downButtonGridData);
 		}

 		Composite valuesComposite = new Composite(contents, SWT.NONE);
 		{
 			GridData data = new GridData(SWT.FILL, SWT.FILL, true, true);
 			data.horizontalAlignment = SWT.END;
 			valuesComposite.setLayoutData(data);

 			GridLayout layout = new GridLayout();
 			data.horizontalAlignment = SWT.FILL;
 			layout.marginHeight = 0;
 			layout.marginWidth = 0;
 			layout.numColumns = 1;
 			valuesComposite.setLayout(layout);
 		}

 		Label valuesLabel = new Label(valuesComposite, SWT.NONE);
 		valuesLabel.setText(delegate.getValuesLabelText());
 		GridData featureLabelGridData = new GridData();
 		featureLabelGridData.horizontalSpan = 2;
 		featureLabelGridData.horizontalAlignment = SWT.FILL;
 		featureLabelGridData.verticalAlignment = SWT.FILL;
 		valuesLabel.setLayoutData(featureLabelGridData);

 		final Table valuesTable = new Table(valuesComposite, SWT.MULTI
 			| SWT.BORDER);
 		GridData featureTableGridData = new GridData();
 		featureTableGridData.widthHint = Display.getCurrent().getBounds().width / 5;
 		featureTableGridData.heightHint = Display.getCurrent().getBounds().height / 3;
 		featureTableGridData.verticalAlignment = SWT.FILL;
 		featureTableGridData.horizontalAlignment = SWT.FILL;
 		featureTableGridData.grabExcessHorizontalSpace = true;
 		featureTableGridData.grabExcessVerticalSpace = true;
 		valuesTable.setLayoutData(featureTableGridData);

 		valuesTableViewer = new TableViewer(valuesTable);
 		valuesTableViewer.setContentProvider(contentProvider);
 		configureLabelProvider(valuesTableViewer);
 		valuesTableViewer.setInput(values);
 		final EList<Object> children = values.getChildren();
 		if (!children.isEmpty()) {
 			valuesTableViewer.setSelection(new StructuredSelection(children
 				.get(0)));
 		}

 		choiceTableViewer.addDoubleClickListener(new IDoubleClickListener() {

 			public void doubleClick(DoubleClickEvent event) {
 				if (addButton.isEnabled()) {
 					addButton.notifyListeners(SWT.Selection, null);
 				}
 			}
 		});

 		valuesTableViewer.addDoubleClickListener(new IDoubleClickListener() {

 			public void doubleClick(DoubleClickEvent event) {
 				if (removeButton.isEnabled()) {
 					removeButton.notifyListeners(SWT.Selection, null);
 				}
 			}
 		});

 		if (allowReorder) {
 			upButton.addSelectionListener(new SelectionAdapter() {

 				@Override
 				public void widgetSelected(SelectionEvent event) {
 					IStructuredSelection selection = (IStructuredSelection) valuesTableViewer
 						.getSelection();
 					int minIndex = 0;
 					for (Iterator<?> i = selection.iterator(); i.hasNext();) {
 						Object value = i.next();
 						int index = children.indexOf(value);
 						children.move(Math.max(index - 1, minIndex++), value);
 					}
 				}
 			});

 			downButton.addSelectionListener(new SelectionAdapter() {

 				@Override
 				public void widgetSelected(SelectionEvent event) {
 					IStructuredSelection selection = (IStructuredSelection) valuesTableViewer
 						.getSelection();
 					int maxIndex = children.size() - 1;
 					List<?> objects = selection.toList();
 					for (ListIterator<?> i = objects.listIterator(objects
 						.size()); i.hasPrevious();) {
 						Object value = i.previous();
 						int index = children.indexOf(value);
 						children.move(Math.min(index + 1, maxIndex--), value);
 					}
 				}
 			});
 		}

 		addButton.addSelectionListener(new SelectionAdapter() {

 			// event is null when choiceTableViewer is double clicked
 			@Override
 			public void widgetSelected(SelectionEvent event) {
 				IStructuredSelection selection = (IStructuredSelection) choiceTableViewer
 					.getSelection();
 				for (Iterator<?> i = selection.iterator(); i.hasNext();) {
 					Object value = i.next();
 					if (!children.contains(value)) {
 						children.add(value);
 					}
 				}
 				valuesTableViewer.refresh();
 				valuesTableViewer.setSelection(selection);
 				choiceTableViewer.refresh();
 			}
 		});

 		removeButton.addSelectionListener(new SelectionAdapter() {

 			// event is null when valuesTableViewer is double clicked
 			@Override
 			public void widgetSelected(SelectionEvent event) {
 				IStructuredSelection selection = (IStructuredSelection) valuesTableViewer
 					.getSelection();
 				Object firstValue = null;
 				for (Iterator<?> i = selection.iterator(); i.hasNext();) {
 					Object value = i.next();
 					if (firstValue == null) {
 						firstValue = value;
 					}
 					children.remove(value);
 				}

 				if (!children.isEmpty()) {
 					valuesTableViewer.setSelection(new StructuredSelection(
 						children.get(0)));
 				}

 				choiceTableViewer.refresh();
 				choiceTableViewer.setSelection(selection);
 			}
 		});

 		choiceTableViewer
 			.addSelectionChangedListener(new ISelectionChangedListener() {

 				public void selectionChanged(SelectionChangedEvent event) {
 					addButton.setEnabled(delegate.canAdd(
 						(IStructuredSelection) event.getSelection(),
 						getValues()));
 				}
 			});

 		valuesTableViewer
 			.addSelectionChangedListener(new ISelectionChangedListener() {

 				public void selectionChanged(SelectionChangedEvent event) {
 					removeButton.setEnabled(delegate.canRemove(
 						(IStructuredSelection) event.getSelection(),
 						getChoices()));
 				}
 			});

 		if (delegate.hasAdditionalControls()) {
 			Composite additional = new Composite(contents, SWT.NONE);
 			additional.setLayoutData(new GridData(SWT.FILL, SWT.TOP, true,
 				false, 3, 1));
 			additional.setLayout(new FillLayout());
 			delegate.createAdditionalControls(additional);
 		}

 		return contents;
 	}

 	protected void configureLabelProvider(TableViewer viewer) {
 		final ILabelProvider labelProvider = delegate
 			.createLabelProvider(viewer);
 		if (labelProvider instanceof CellLabelProvider) {
 			// create a table column to install styling support
 			final TableViewerColumn column = new TableViewerColumn(viewer,
 				SWT.LEFT);
 			column.setLabelProvider((CellLabelProvider) labelProvider);

 			// pin the width of the column to the table size (only column)
 			viewer.getTable().addControlListener(new ControlAdapter() {

 				@Override
 				public void controlResized(ControlEvent e) {
 					column.getColumn().setWidth(
 						((Control) e.widget).getSize().x);
 				}
 			});
 		} else {
 			viewer.setLabelProvider(labelProvider);
 		}

 	}

 	protected Collection<T> getChoices() {
 		return choiceOfValues;
 	}

 	protected EList<T> getValues() {
 		Class<T> type = delegate.getElementType();

 		EList<T> result = new BasicEList<T>(values.getChildren().size());
 		for (Object next : values.getChildren()) {
 			if (type.isInstance(next)) {
 				result.add(type.cast(next));
 			}
 		}

 		return result;
 	}

 	@Override
 	protected void okPressed() {
 		EList<T> values = getValues();
 		if (delegate.okPressed(values)) {
 			result = values;
 			super.okPressed();
 		}
 	}

 	@Override
 	public boolean close() {
 		contentProvider.dispose();
 		return super.close();
 	}

 	public EList<T> getResult() {
 		return result;
 	}
 }
	/*
	* Copyright (c) 2002, 2014 IBM Corporation, CEA, and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* IBM - initial API and implementation
	* Christian W. Damus (CEA) - 326915, 268444
	*
	*/
	package org.eclipse.uml2.uml.editor.dialogs;

	import java.util.Collection;
	import java.util.Collections;
	import java.util.Iterator;
	import java.util.List;
	import java.util.ListIterator;

	import org.eclipse.emf.common.notify.AdapterFactory;
	import org.eclipse.emf.common.notify.impl.AdapterFactoryImpl;
	import org.eclipse.emf.common.util.BasicEList;
	import org.eclipse.emf.common.util.EList;
	import org.eclipse.emf.edit.provider.ComposedAdapterFactory;
	import org.eclipse.emf.edit.provider.ItemProvider;
	import org.eclipse.emf.edit.ui.EMFEditUIPlugin;
	import org.eclipse.emf.edit.ui.provider.AdapterFactoryContentProvider;
	import org.eclipse.emf.edit.ui.provider.ExtendedImageRegistry;
	import org.eclipse.jface.dialogs.Dialog;
	import org.eclipse.jface.viewers.AbstractTreeViewer;
	import org.eclipse.jface.viewers.CellLabelProvider;
	import org.eclipse.jface.viewers.DoubleClickEvent;
	import org.eclipse.jface.viewers.IContentProvider;
	import org.eclipse.jface.viewers.IDoubleClickListener;
	import org.eclipse.jface.viewers.ILabelProvider;
	import org.eclipse.jface.viewers.ISelectionChangedListener;
	import org.eclipse.jface.viewers.IStructuredSelection;
	import org.eclipse.jface.viewers.SelectionChangedEvent;
	import org.eclipse.jface.viewers.StructuredSelection;
	import org.eclipse.jface.viewers.TableViewer;
	import org.eclipse.jface.viewers.TableViewerColumn;
	import org.eclipse.jface.viewers.Viewer;
	import org.eclipse.jface.viewers.ViewerFilter;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.ControlAdapter;
	import org.eclipse.swt.events.ControlEvent;
	import org.eclipse.swt.events.ModifyEvent;
	import org.eclipse.swt.events.ModifyListener;
	import org.eclipse.swt.events.SelectionAdapter;
	import org.eclipse.swt.events.SelectionEvent;
	import org.eclipse.swt.layout.FillLayout;
	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.Control;
	import org.eclipse.swt.widgets.Display;
	import org.eclipse.swt.widgets.Group;
	import org.eclipse.swt.widgets.Label;
	import org.eclipse.swt.widgets.Shell;
	import org.eclipse.swt.widgets.Table;
	import org.eclipse.swt.widgets.Text;
	import org.eclipse.ui.dialogs.PatternFilter;
	import org.eclipse.uml2.uml.editor.UMLEditorPlugin;

	/**
	* A two-pane dialog, adapted from FeatureEditorDialog in EMF, that lets the
	* user choose elements from the left-side list to add to the right-side list.
	* The elements on the right-side list may optionally be ordered by moving them
	* up and down.
	*
	* The dialog delegates a variety of decisions to a
	* {@linkplain IChoicesDialogDelegate delegate}.
	*
	* @since 5.0
	*
	* @see IChoicesDialogDelegate
	*/
	public class ChoicesDialog<T>
	extends Dialog {

	protected IContentProvider contentProvider;

	protected Object object;

	protected String displayName;

	protected ItemProvider values;

	protected List<T> choiceOfValues;

	protected TableViewer choiceTableViewer;

	protected TableViewer valuesTableViewer;

	protected EList<T> result;

	protected final IChoicesDialogDelegate<T> delegate;

	public ChoicesDialog(Shell parent, Object object, String displayName,
	IChoicesDialogDelegate<T> delegate) {

	super(parent);

	setShellStyle(getShellStyle() \| SWT.RESIZE \| SWT.MAX);
	this.object = object;
	this.displayName = displayName;
	this.delegate = delegate;

	if (delegate instanceof AbstractChoicesDialogDelegate<?>) {
	((AbstractChoicesDialogDelegate<T>) delegate).setDialog(this);
	}

	AdapterFactory adapterFactory = new ComposedAdapterFactory(
	Collections.<AdapterFactory> emptyList());
	values = new ItemProvider(adapterFactory, Collections.EMPTY_LIST);
	contentProvider = new AdapterFactoryContentProvider(adapterFactory);

	updateChoiceOfValues();
	}

	@Override
	protected void configureShell(Shell shell) {
	super.configureShell(shell);

	ILabelProvider labelProvider = delegate.getLabelProvider();
	shell.setText(UMLEditorPlugin.INSTANCE.getString(
	"_UI_ChoicesDialog_title",
	new Object[]{displayName, labelProvider.getText(object)}));
	shell.setImage(labelProvider.getImage(object));
	}

	/**
	* Updates me to reflect a change in the choice of values provided by my
	* delegate.
	*/
	public void updateChoiceOfValues() {
	choiceOfValues = new java.util.ArrayList<T>(
	delegate.getChoiceOfValues());
	if (values != null) {
	// anything that's no longer a choice must be removed
	values.getChildren().retainAll(choiceOfValues);
	}

	if (choiceTableViewer != null) {
	choiceTableViewer.setInput(new ItemProvider(choiceOfValues));
	}
	if (valuesTableViewer != null) {
	valuesTableViewer.refresh();
	}
	}

	@Override
	protected Control createDialogArea(Composite parent) {
	Composite contents = (Composite) super.createDialogArea(parent);

	GridLayout contentsGridLayout = (GridLayout) contents.getLayout();
	contentsGridLayout.numColumns = 3;

	GridData contentsGridData = (GridData) contents.getLayoutData();
	contentsGridData.horizontalAlignment = SWT.FILL;
	contentsGridData.verticalAlignment = SWT.FILL;

	Text patternText = null;

	Group filterGroupComposite = new Group(contents, SWT.NONE);
	filterGroupComposite.setText(EMFEditUIPlugin.INSTANCE
	.getString("_UI_Choices_pattern_group"));
	filterGroupComposite.setLayout(new GridLayout(2, false));
	filterGroupComposite.setLayoutData(new GridData(SWT.FILL, SWT.DEFAULT,
	true, false, 3, 1));

	Label label = new Label(filterGroupComposite, SWT.NONE);
	label.setText(EMFEditUIPlugin.INSTANCE
	.getString("_UI_Choices_pattern_label"));

	patternText = new Text(filterGroupComposite, SWT.BORDER \| SWT.SEARCH);
	patternText.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

	Composite choiceComposite = new Composite(contents, SWT.NONE);
	{
	GridData data = new GridData(SWT.FILL, SWT.FILL, true, true);
	data.horizontalAlignment = SWT.END;
	choiceComposite.setLayoutData(data);

	GridLayout layout = new GridLayout();
	data.horizontalAlignment = SWT.FILL;
	layout.marginHeight = 0;
	layout.marginWidth = 0;
	layout.numColumns = 1;
	choiceComposite.setLayout(layout);
	}

	Label choiceLabel = new Label(choiceComposite, SWT.NONE);
	choiceLabel.setText(delegate.getChoicesLabelText());
	GridData choiceLabelGridData = new GridData();
	choiceLabelGridData.verticalAlignment = SWT.FILL;
	choiceLabelGridData.horizontalAlignment = SWT.FILL;
	choiceLabel.setLayoutData(choiceLabelGridData);

	final Table choiceTable = new Table(choiceComposite, SWT.MULTI
	\| SWT.BORDER);
	GridData choiceTableGridData = new GridData();
	choiceTableGridData.widthHint = Display.getCurrent().getBounds().width / 5;
	choiceTableGridData.heightHint = Display.getCurrent().getBounds().height / 3;
	choiceTableGridData.verticalAlignment = SWT.FILL;
	choiceTableGridData.horizontalAlignment = SWT.FILL;
	choiceTableGridData.grabExcessHorizontalSpace = true;
	choiceTableGridData.grabExcessVerticalSpace = true;
	choiceTable.setLayoutData(choiceTableGridData);

	choiceTableViewer = new TableViewer(choiceTable);
	choiceTableViewer.setContentProvider(new AdapterFactoryContentProvider(
	new AdapterFactoryImpl()));
	configureLabelProvider(choiceTableViewer);
	final PatternFilter filter = new PatternFilter() {

	@Override
	protected boolean isParentMatch(Viewer viewer, Object element) {
	return viewer instanceof AbstractTreeViewer
	&& super.isParentMatch(viewer, element);
	}
	};
	choiceTableViewer.addFilter(filter);
	if (patternText != null) {
	patternText.addModifyListener(new ModifyListener() {

	public void modifyText(ModifyEvent e) {
	filter.setPattern(((Text) e.widget).getText());
	choiceTableViewer.refresh();
	}
	});
	}

	// enforce uniqueness
	choiceTableViewer.addFilter(new ViewerFilter() {

	@Override
	public boolean select(Viewer viewer, Object parentElement,
	Object element) {
	return !values.getChildren().contains(element);
	}
	});
	choiceTableViewer.setInput(new ItemProvider(choiceOfValues));

	Composite controlButtons = new Composite(contents, SWT.NONE);
	GridData controlButtonsGridData = new GridData();
	controlButtonsGridData.verticalAlignment = SWT.FILL;
	controlButtonsGridData.horizontalAlignment = SWT.FILL;
	controlButtons.setLayoutData(controlButtonsGridData);

	GridLayout controlsButtonGridLayout = new GridLayout();
	controlButtons.setLayout(controlsButtonGridLayout);

	new Label(controlButtons, SWT.NONE);

	final Button addButton = new Button(controlButtons, SWT.PUSH);
	addButton.setText(delegate.getAddButtonText());
	addButton.setImage(ExtendedImageRegistry.getInstance().getImage(
	UMLEditorPlugin.INSTANCE.getImage("full/etool16/ArrowRight.gif"))); //$NON-NLS-1$
	GridData addButtonGridData = new GridData();
	addButtonGridData.verticalAlignment = SWT.FILL;
	addButtonGridData.horizontalAlignment = SWT.FILL;
	addButton.setLayoutData(addButtonGridData);

	final Button removeButton = new Button(controlButtons, SWT.PUSH);
	removeButton.setText(delegate.getRemoveButtonText());
	removeButton.setImage(ExtendedImageRegistry.getInstance().getImage(
	UMLEditorPlugin.INSTANCE.getImage("full/etool16/ArrowLeft.gif"))); //$NON-NLS-1$
	GridData removeButtonGridData = new GridData();
	removeButtonGridData.verticalAlignment = SWT.FILL;
	removeButtonGridData.horizontalAlignment = SWT.FILL;
	removeButton.setLayoutData(removeButtonGridData);

	Label spaceLabel = new Label(controlButtons, SWT.NONE);
	GridData spaceLabelGridData = new GridData();
	spaceLabelGridData.verticalSpan = 2;
	spaceLabel.setLayoutData(spaceLabelGridData);

	final boolean allowReorder = delegate.allowsReordering();
	final Button upButton = allowReorder
	? new Button(controlButtons, SWT.PUSH)
	: null;
	if (allowReorder) {
	upButton
	.setText(EMFEditUIPlugin.INSTANCE.getString("_UI_Up_label"));
	upButton.setImage(ExtendedImageRegistry.getInstance().getImage(
	UMLEditorPlugin.INSTANCE.getImage("full/etool16/ArrowUp.gif"))); //$NON-NLS-1$
	GridData upButtonGridData = new GridData();
	upButtonGridData.verticalAlignment = SWT.FILL;
	upButtonGridData.horizontalAlignment = SWT.FILL;
	upButton.setLayoutData(upButtonGridData);
	}

	final Button downButton = allowReorder
	? new Button(controlButtons, SWT.PUSH)
	: null;
	if (allowReorder) {
	downButton.setText(EMFEditUIPlugin.INSTANCE
	.getString("_UI_Down_label"));
	downButton.setImage(ExtendedImageRegistry.getInstance()
	.getImage(
	UMLEditorPlugin.INSTANCE
	.getImage("full/etool16/ArrowDown.gif"))); //$NON-NLS-1$
	GridData downButtonGridData = new GridData();
	downButtonGridData.verticalAlignment = SWT.FILL;
	downButtonGridData.horizontalAlignment = SWT.FILL;
	downButton.setLayoutData(downButtonGridData);
	}

	Composite valuesComposite = new Composite(contents, SWT.NONE);
	{
	GridData data = new GridData(SWT.FILL, SWT.FILL, true, true);
	data.horizontalAlignment = SWT.END;
	valuesComposite.setLayoutData(data);

	GridLayout layout = new GridLayout();
	data.horizontalAlignment = SWT.FILL;
	layout.marginHeight = 0;
	layout.marginWidth = 0;
	layout.numColumns = 1;
	valuesComposite.setLayout(layout);
	}

	Label valuesLabel = new Label(valuesComposite, SWT.NONE);
	valuesLabel.setText(delegate.getValuesLabelText());
	GridData featureLabelGridData = new GridData();
	featureLabelGridData.horizontalSpan = 2;
	featureLabelGridData.horizontalAlignment = SWT.FILL;
	featureLabelGridData.verticalAlignment = SWT.FILL;
	valuesLabel.setLayoutData(featureLabelGridData);

	final Table valuesTable = new Table(valuesComposite, SWT.MULTI
	\| SWT.BORDER);
	GridData featureTableGridData = new GridData();
	featureTableGridData.widthHint = Display.getCurrent().getBounds().width / 5;
	featureTableGridData.heightHint = Display.getCurrent().getBounds().height / 3;
	featureTableGridData.verticalAlignment = SWT.FILL;
	featureTableGridData.horizontalAlignment = SWT.FILL;
	featureTableGridData.grabExcessHorizontalSpace = true;
	featureTableGridData.grabExcessVerticalSpace = true;
	valuesTable.setLayoutData(featureTableGridData);

	valuesTableViewer = new TableViewer(valuesTable);
	valuesTableViewer.setContentProvider(contentProvider);
	configureLabelProvider(valuesTableViewer);
	valuesTableViewer.setInput(values);
	final EList<Object> children = values.getChildren();
	if (!children.isEmpty()) {
	valuesTableViewer.setSelection(new StructuredSelection(children
	.get(0)));
	}

	choiceTableViewer.addDoubleClickListener(new IDoubleClickListener() {

	public void doubleClick(DoubleClickEvent event) {
	if (addButton.isEnabled()) {
	addButton.notifyListeners(SWT.Selection, null);
	}
	}
	});

	valuesTableViewer.addDoubleClickListener(new IDoubleClickListener() {

	public void doubleClick(DoubleClickEvent event) {
	if (removeButton.isEnabled()) {
	removeButton.notifyListeners(SWT.Selection, null);
	}
	}
	});

	if (allowReorder) {
	upButton.addSelectionListener(new SelectionAdapter() {

	@Override
	public void widgetSelected(SelectionEvent event) {
	IStructuredSelection selection = (IStructuredSelection) valuesTableViewer
	.getSelection();
	int minIndex = 0;
	for (Iterator<?> i = selection.iterator(); i.hasNext();) {
	Object value = i.next();
	int index = children.indexOf(value);
	children.move(Math.max(index - 1, minIndex++), value);
	}
	}
	});

	downButton.addSelectionListener(new SelectionAdapter() {

	@Override
	public void widgetSelected(SelectionEvent event) {
	IStructuredSelection selection = (IStructuredSelection) valuesTableViewer
	.getSelection();
	int maxIndex = children.size() - 1;
	List<?> objects = selection.toList();
	for (ListIterator<?> i = objects.listIterator(objects
	.size()); i.hasPrevious();) {
	Object value = i.previous();
	int index = children.indexOf(value);
	children.move(Math.min(index + 1, maxIndex--), value);
	}
	}
	});
	}

	addButton.addSelectionListener(new SelectionAdapter() {

	// event is null when choiceTableViewer is double clicked
	@Override
	public void widgetSelected(SelectionEvent event) {
	IStructuredSelection selection = (IStructuredSelection) choiceTableViewer
	.getSelection();
	for (Iterator<?> i = selection.iterator(); i.hasNext();) {
	Object value = i.next();
	if (!children.contains(value)) {
	children.add(value);
	}
	}
	valuesTableViewer.refresh();
	valuesTableViewer.setSelection(selection);
	choiceTableViewer.refresh();
	}
	});

	removeButton.addSelectionListener(new SelectionAdapter() {

	// event is null when valuesTableViewer is double clicked
	@Override
	public void widgetSelected(SelectionEvent event) {
	IStructuredSelection selection = (IStructuredSelection) valuesTableViewer
	.getSelection();
	Object firstValue = null;
	for (Iterator<?> i = selection.iterator(); i.hasNext();) {
	Object value = i.next();
	if (firstValue == null) {
	firstValue = value;
	}
	children.remove(value);
	}

	if (!children.isEmpty()) {
	valuesTableViewer.setSelection(new StructuredSelection(
	children.get(0)));
	}

	choiceTableViewer.refresh();
	choiceTableViewer.setSelection(selection);
	}
	});

	choiceTableViewer
	.addSelectionChangedListener(new ISelectionChangedListener() {

	public void selectionChanged(SelectionChangedEvent event) {
	addButton.setEnabled(delegate.canAdd(
	(IStructuredSelection) event.getSelection(),
	getValues()));
	}
	});

	valuesTableViewer
	.addSelectionChangedListener(new ISelectionChangedListener() {

	public void selectionChanged(SelectionChangedEvent event) {
	removeButton.setEnabled(delegate.canRemove(
	(IStructuredSelection) event.getSelection(),
	getChoices()));
	}
	});

	if (delegate.hasAdditionalControls()) {
	Composite additional = new Composite(contents, SWT.NONE);
	additional.setLayoutData(new GridData(SWT.FILL, SWT.TOP, true,
	false, 3, 1));
	additional.setLayout(new FillLayout());
	delegate.createAdditionalControls(additional);
	}

	return contents;
	}

	protected void configureLabelProvider(TableViewer viewer) {
	final ILabelProvider labelProvider = delegate
	.createLabelProvider(viewer);
	if (labelProvider instanceof CellLabelProvider) {
	// create a table column to install styling support
	final TableViewerColumn column = new TableViewerColumn(viewer,
	SWT.LEFT);
	column.setLabelProvider((CellLabelProvider) labelProvider);

	// pin the width of the column to the table size (only column)
	viewer.getTable().addControlListener(new ControlAdapter() {

	@Override
	public void controlResized(ControlEvent e) {
	column.getColumn().setWidth(
	((Control) e.widget).getSize().x);
	}
	});
	} else {
	viewer.setLabelProvider(labelProvider);
	}

	}

	protected Collection<T> getChoices() {
	return choiceOfValues;
	}

	protected EList<T> getValues() {
	Class<T> type = delegate.getElementType();

	EList<T> result = new BasicEList<T>(values.getChildren().size());
	for (Object next : values.getChildren()) {
	if (type.isInstance(next)) {
	result.add(type.cast(next));
	}
	}

	return result;
	}

	@Override
	protected void okPressed() {
	EList<T> values = getValues();
	if (delegate.okPressed(values)) {
	result = values;
	super.okPressed();
	}
	}

	@Override
	public boolean close() {
	contentProvider.dispose();
	return super.close();
	}

	public EList<T> getResult() {
	return result;
	}
	}