/*******************************************************************************
 * Copyright (c) 2006 The Pampered Chef, Inc. 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:
 *     The Pampered Chef, Inc. - initial API and implementation
 *     Tom Schindl - cell editing
 *     Matthew Hall - bugs 260329, 260337
 ******************************************************************************/

module org.eclipse.jface.examples.databinding.snippets.Snippet013TableViewerEditing;

import java.lang.all;

import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import java.util.LinkedList;
import java.util.List;

import org.eclipse.core.databinding.DataBindingContext;
import org.eclipse.core.databinding.beans.BeanProperties;
import org.eclipse.core.databinding.beans.BeansObservables;
import org.eclipse.core.databinding.observable.Realm;
import org.eclipse.core.databinding.observable.list.WritableList;
import org.eclipse.core.databinding.observable.value.IObservableValue;
import org.eclipse.jface.databinding.swt.SWTObservables;
import org.eclipse.jface.databinding.viewers.ObservableValueEditingSupport;
import org.eclipse.jface.databinding.viewers.ViewerSupport;
import org.eclipse.jface.databinding.viewers.ViewersObservables;
import org.eclipse.jface.viewers.CellEditor;
import org.eclipse.jface.viewers.ColumnViewer;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.TableViewerColumn;
import org.eclipse.jface.viewers.TextCellEditor;
import org.eclipse.jface.viewers.ViewerCell;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
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.Table;

/**
 * Demonstrates binding a TableViewer to a collection using the 3.3 Viewer APIs.
 */
public class Snippet013TableViewerEditing {
    public static void main(String[] args) {
        final Display display = new Display();
        Realm.runWithDefault(SWTObservables.getRealm(display), new Runnable() {
            public void run() {
                ViewModel viewModel = new ViewModel();
                Shell shell = new View(viewModel).createShell();

                // The SWT event loop
                while (!shell.isDisposed()) {
                    if (!display.readAndDispatch()) {
                        display.sleep();
                    }
                }
            }
        });
    }

    // Minimal JavaBeans support
    public static abstract class AbstractModelObject {
        private PropertyChangeSupport propertyChangeSupport = new PropertyChangeSupport(
                this);

        public void addPropertyChangeListener(PropertyChangeListener listener) {
            propertyChangeSupport.addPropertyChangeListener(listener);
        }

        public void addPropertyChangeListener(String propertyName,
                PropertyChangeListener listener) {
            propertyChangeSupport.addPropertyChangeListener(propertyName,
                    listener);
        }

        public void removePropertyChangeListener(PropertyChangeListener listener) {
            propertyChangeSupport.removePropertyChangeListener(listener);
        }

        public void removePropertyChangeListener(String propertyName,
                PropertyChangeListener listener) {
            propertyChangeSupport.removePropertyChangeListener(propertyName,
                    listener);
        }

        protected void firePropertyChange(String propertyName, Object oldValue,
                Object newValue) {
            propertyChangeSupport.firePropertyChange(propertyName, oldValue,
                    newValue);
        }
    }

    // The data model class. This is normally a persistent class of some sort.
    static class Person extends AbstractModelObject {
        // A property...
        String name = "John Smith";

        public Person(String name) {
            this.name = name;
        }

        public String getName() {
            return name;
        }

        public void setName(String name) {
            String oldValue = this.name;
            this.name = name;
            firePropertyChange("name", oldValue, name);
        }
    }

    // The View's model--the root of our Model graph for this particular GUI.
    //
    // Typically each View class has a corresponding ViewModel class.
    // The ViewModel is responsible for getting the objects to edit from the
    // data access tier. Since this snippet doesn't have any persistent objects
    // ro retrieve, this ViewModel just instantiates a model object to edit.
    static class ViewModel {
        // The model to bind
        private List people = new LinkedList();
        {
            people.add(new Person("Steve Northover"));
            people.add(new Person("Grant Gayed"));
            people.add(new Person("Veronika Irvine"));
            people.add(new Person("Mike Wilson"));
            people.add(new Person("Christophe Cornu"));
            people.add(new Person("Lynne Kues"));
            people.add(new Person("Silenio Quarti"));
        }

        public List getPeople() {
            return people;
        }
    }

    /**
     * Editing support that uses JFace Data Binding to control the editing
     * lifecycle. The standard EditingSupport get/setValue(...) lifecycle is not
     * used.
     * 
     * @since 3.3
     */
    private static class InlineEditingSupport extends
            ObservableValueEditingSupport {
        private CellEditor cellEditor;

        /**
         * @param viewer
         * @param dbc
         */
        public InlineEditingSupport(ColumnViewer viewer, DataBindingContext dbc) {

            super(viewer, dbc);
            cellEditor = new TextCellEditor((Composite) viewer.getControl());
        }

        protected CellEditor getCellEditor(Object element) {
            return cellEditor;
        }

        protected IObservableValue doCreateCellEditorObservable(
                CellEditor cellEditor) {

            return SWTObservables.observeText(cellEditor.getControl(),
                    SWT.Modify);
        }

        protected IObservableValue doCreateElementObservable(Object element,
                ViewerCell cell) {
            return BeansObservables.observeValue(element, "name");
        }
    }

    // The GUI view
    static class View {
        private ViewModel viewModel;
        private Table committers;
        private Label selectedCommitter;

        public View(ViewModel viewModel) {
            this.viewModel = viewModel;
        }

        public Shell createShell() {
            // Build a UI
            Display display = Display.getDefault();
            Shell shell = new Shell(display);
            shell.setLayout(new FillLayout(SWT.VERTICAL));
            committers = new Table(shell, SWT.BORDER | SWT.FULL_SELECTION);
            committers.setLinesVisible(true);

            selectedCommitter = new Label(shell, SWT.NONE);
            // Set up data binding. In an RCP application, the threading
            // Realm
            // will be set for you automatically by the Workbench. In an SWT
            // application, you can do this once, wrpping your binding
            // method call.
            DataBindingContext bindingContext = new DataBindingContext();
            bindGUI(bindingContext);

            // Open and return the Shell
            shell.setSize(100, 300);
            shell.open();
            return shell;
        }

        protected void bindGUI(DataBindingContext bindingContext) {
            // Since we're using a JFace Viewer, we do first wrap our Table...
            TableViewer peopleViewer = new TableViewer(committers);
            TableViewerColumn column = new TableViewerColumn(peopleViewer,
                    SWT.NONE);
            column.setEditingSupport(new InlineEditingSupport(peopleViewer,
                    bindingContext));
            column.getColumn().setWidth(100);

            // Bind viewer to model
            ViewerSupport.bind(peopleViewer, new WritableList(viewModel
                    .getPeople(), Person.class), BeanProperties.value(
                    Person.class, "name"));

            // bind selectedCommitter label to the name of the current selection
            IObservableValue selection = ViewersObservables
                    .observeSingleSelection(peopleViewer);
            bindingContext.bindValue(SWTObservables
                    .observeText(selectedCommitter), BeansObservables
                    .observeDetailValue(selection, "name", String.class));
        }
    }

}
void main( String[] args ){
    Snippet013TableViewerEditing.main(args);
}