Java tutorial
/******************************************************************************* * Copyright (c) 2009 BestSolution.at 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: * Tom Schindl<tom.schindl@bestsolution.at> - initial API and implementation *******************************************************************************/ package org.eclipse.emf.examples.library.databinding.stock.dialog; import org.eclipse.core.databinding.DataBindingContext; import org.eclipse.core.databinding.UpdateValueStrategy; import org.eclipse.core.databinding.observable.Realm; import org.eclipse.core.databinding.property.value.IValueProperty; import org.eclipse.emf.databinding.edit.EMFEditObservables; import org.eclipse.emf.databinding.edit.properties.EMFEditProperties; import org.eclipse.emf.databinding.edit.properties.IEMFEditValueProperty; import org.eclipse.emf.ecore.util.EcoreUtil; import org.eclipse.emf.example.library.service.ISavePoint; import org.eclipse.emf.example.library.service.ISavePointEditingDomain; import org.eclipse.emf.examples.extlibrary.Book; import org.eclipse.emf.examples.extlibrary.BookCategory; import org.eclipse.emf.examples.extlibrary.EXTLibraryPackage; import org.eclipse.emf.examples.extlibrary.Library; import org.eclipse.emf.examples.extlibrary.Writer; import org.eclipse.emf.examples.library.databinding.common.converter.DateToStringConverter; import org.eclipse.emf.examples.library.databinding.tokenviewer.TokenViewer; import org.eclipse.jface.databinding.swt.ISWTObservableValue; import org.eclipse.jface.databinding.swt.SWTObservables; import org.eclipse.jface.databinding.swt.WidgetProperties; import org.eclipse.jface.databinding.viewers.ViewerProperties; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.dialogs.TitleAreaDialog; import org.eclipse.jface.viewers.ArrayContentProvider; import org.eclipse.jface.viewers.ComboViewer; import org.eclipse.jface.viewers.LabelProvider; import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Text; public class BookDialog extends TitleAreaDialog { private Book book; private Library library; private ISavePointEditingDomain domain; private ISavePoint savePoint; public BookDialog(Shell parentShell, ISavePointEditingDomain domain, Library library, Book book) { super(parentShell); this.book = book; this.library = library; this.domain = domain; } @Override protected Point getInitialSize() { return new Point(500, super.getInitialSize().y); } @Override public int open() { savePoint = domain.addSavePoint(EcoreUtil.generateUUID()); return super.open(); } @Override protected Control createDialogArea(Composite parent) { Composite container = (Composite) super.createDialogArea(parent); getShell().setText("Edit Book"); setTitle("Edit the book"); setMessage( "Edit the data of the book with the form below and press ok when done or cancel to undo all modifications."); Composite comp = new Composite(container, SWT.NONE); comp.setLayoutData(new GridData(GridData.FILL_BOTH)); comp.setLayout(new GridLayout(2, false)); DataBindingContext dbc = new DataBindingContext(); /* * Title */ Label l = new Label(comp, SWT.NONE); l.setText("Title"); Text t = new Text(comp, SWT.BORDER); t.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); IValueProperty uProp = WidgetProperties.text(SWT.Modify); IEMFEditValueProperty mProp = EMFEditProperties.value(domain, EXTLibraryPackage.Literals.BOOK__TITLE); dbc.bindValue(SWTObservables.observeDelayedValue(400, (ISWTObservableValue) uProp.observe(t)), mProp.observe(book)); /* * Publication Date */ l = new Label(comp, SWT.NONE); l.setText("Publication Date"); t = new Text(comp, SWT.BORDER); t.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); mProp = EMFEditProperties.value(domain, EXTLibraryPackage.Literals.ITEM__PUBLICATION_DATE); dbc.bindValue(SWTObservables.observeDelayedValue(400, (ISWTObservableValue) uProp.observe(t)), mProp.observe(book), new UpdateValueStrategy(), new UpdateValueStrategy().setConverter(new DateToStringConverter())); /* * Copies */ l = new Label(comp, SWT.NONE); l.setText("Copies"); t = new Text(comp, SWT.BORDER); t.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); mProp = EMFEditProperties.value(domain, EXTLibraryPackage.Literals.LENDABLE__COPIES); dbc.bindValue(SWTObservables.observeDelayedValue(400, (ISWTObservableValue) uProp.observe(t)), mProp.observe(book)); /* * Pages */ l = new Label(comp, SWT.NONE); l.setText("Pages"); t = new Text(comp, SWT.BORDER); t.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); mProp = EMFEditProperties.value(domain, EXTLibraryPackage.Literals.BOOK__PAGES); dbc.bindValue(SWTObservables.observeDelayedValue(400, (ISWTObservableValue) uProp.observe(t)), mProp.observe(book)); /* * Category */ l = new Label(comp, SWT.NONE); l.setText("Category"); ComboViewer categoryViewer = new ComboViewer(comp, SWT.BORDER); categoryViewer.setContentProvider(new ArrayContentProvider()); categoryViewer.setLabelProvider(new LabelProvider() { @Override public String getText(Object element) { switch ((BookCategory) element) { case BIOGRAPHY_LITERAL: return "Biographie"; case MYSTERY_LITERAL: return "Mystery"; case SCIENCE_FICTION_LITERAL: return "Science Fiction"; default: return ""; } } }); categoryViewer.getCombo().setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); categoryViewer.setInput(new BookCategory[] { BookCategory.BIOGRAPHY_LITERAL, BookCategory.MYSTERY_LITERAL, BookCategory.SCIENCE_FICTION_LITERAL }); IValueProperty selectionProp = ViewerProperties.singleSelection(); mProp = EMFEditProperties.value(domain, EXTLibraryPackage.Literals.BOOK__CATEGORY); dbc.bindValue(selectionProp.observe(categoryViewer), mProp.observe(book)); /* * Author */ l = new Label(comp, SWT.NONE); l.setText("Author"); TokenViewer authorViewer = new TokenViewer(comp); authorViewer.getControl().setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); authorViewer.setLabelProvider(new LabelProvider() { @Override public String getText(Object element) { Writer w = (Writer) element; return w.getLastName() + ", " + w.getFirstName(); } }); authorViewer.setContentProvider(new ArrayContentProvider()); authorViewer.setInput(EMFEditObservables.observeList(Realm.getDefault(), domain, library, EXTLibraryPackage.Literals.LIBRARY__WRITERS)); mProp = EMFEditProperties.value(domain, EXTLibraryPackage.Literals.BOOK__AUTHOR); dbc.bindValue(selectionProp.observe(authorViewer), mProp.observe(book)); return container; } @Override protected void okPressed() { savePoint.dispose(); super.okPressed(); } @Override protected void cancelPressed() { if (savePoint.canRollback()) { savePoint.rollback(); super.cancelPressed(); } else { MessageDialog.openInformation(getShell(), "Rollback failed", "An error occurred while rolling back to the save point!"); } } }