/*******************************************************************************
 * 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:
 *     Coconut Palm Software, Inc. - Initial API and implementation
 *     Matthew Hall - bug 195222, 261843, 260337
 ******************************************************************************/

module org.eclipse.jface.examples.databinding.snippets.Snippet025TableViewerWithPropertyDerivedColumns;

import java.lang.all;

import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;

import org.eclipse.core.databinding.DataBindingContext;
import org.eclipse.core.databinding.beans.BeanProperties;
import org.eclipse.core.databinding.observable.Realm;
import org.eclipse.core.databinding.observable.list.IObservableList;
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.swt.WidgetProperties;
import org.eclipse.jface.databinding.viewers.ViewerSupport;
import org.eclipse.jface.databinding.viewers.ViewerProperties;
import org.eclipse.jface.layout.GridDataFactory;
import org.eclipse.jface.layout.GridLayoutFactory;
import org.eclipse.jface.viewers.ComboViewer;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerFilter;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
import org.eclipse.swt.widgets.Text;

/**
 * Demonstrates binding a TableViewer to a collection.
 */
public class Snippet025TableViewerWithPropertyDerivedColumns {
    public static void main(String[] args) {
        final Display display = new Display();

        // 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, wrapping your binding
        // method call.
        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);
        }
    }

    private static Person UNKNOWN = new Person("unknown", null, null);

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

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

        public String getName() {
            return name;
        }

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

        public Person getMother() {
            return mother;
        }

        public void setMother(Person mother) {
            firePropertyChange("mother", this.mother, this.mother = mother);
        }

        public Person getFather() {
            return father;
        }

        public void setFather(Person father) {
            firePropertyChange("father", this.father, this.father = father);
        }
    }

    // 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 IObservableList people = new WritableList();
        {
            Person fergus = new Person("Fergus McDuck", UNKNOWN, UNKNOWN);
            Person downy = new Person("Downy O'Drake", UNKNOWN, UNKNOWN);
            Person scrooge = new Person("Scrooge McDuck", downy, fergus);
            Person hortense = new Person("Hortense McDuck", downy, fergus);
            Person quackmore = new Person("Quackmore Duck", UNKNOWN, UNKNOWN);
            Person della = new Person("Della Duck", hortense, quackmore);
            Person donald = new Person("Donald Duck", hortense, quackmore);
            people.add(UNKNOWN);
            people.add(downy);
            people.add(fergus);
            people.add(scrooge);
            people.add(quackmore);
            people.add(hortense);
            people.add(della);
            people.add(donald);
        }

        public IObservableList getPeople() {
            return people;
        }
    }

    // The GUI view
    static class View {
        private ViewModel viewModel;
        private Table duckFamily;
        private Text nameText;
        private Combo motherCombo;
        private Combo fatherCombo;

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

        public Shell createShell() {
            // Build a UI
            Display display = Display.getDefault();
            Shell shell = new Shell(display);
            duckFamily = new Table(shell, SWT.BORDER | SWT.FULL_SELECTION);
            duckFamily.setHeaderVisible(true);
            GridDataFactory.defaultsFor(duckFamily).span(2, 1).applyTo(
                    duckFamily);
            createColumn("Name");
            createColumn("Mother");
            createColumn("Father");
            createColumn("Maternal Grandmother");
            createColumn("Maternal Grandfather");
            createColumn("Paternal Grandmother");
            createColumn("Paternal Grandfather");

            duckFamily.setLinesVisible(true);

            new Label(shell, SWT.NONE).setText("Name:");
            nameText = new Text(shell, SWT.BORDER);
            GridDataFactory.defaultsFor(nameText).grab(true, false).applyTo(
                    nameText);

            new Label(shell, SWT.NONE).setText("Mother:");
            motherCombo = new Combo(shell, SWT.READ_ONLY);

            new Label(shell, SWT.NONE).setText("Father:");
            fatherCombo = new Combo(shell, SWT.READ_ONLY);

            DataBindingContext bindingContext = new DataBindingContext();
            bindGUI(bindingContext);

            GridLayoutFactory.swtDefaults().numColumns(2).applyTo(shell);
            // Open and return the Shell
            shell.setSize(800, 300);
            shell.open();
            return shell;
        }

        private void createColumn(String string) {
            final TableColumn column = new TableColumn(duckFamily, SWT.NONE);
            column.setText(string);
            column.pack();
            if (column.getWidth() < 100)
                column.setWidth(100);
        }

        protected void bindGUI(DataBindingContext dbc) {
            // Since we're using a JFace Viewer, we do first wrap our Table...
            TableViewer peopleViewer = new TableViewer(duckFamily);
            peopleViewer.addFilter(new ViewerFilter() {
                public bool select(Viewer viewer, Object parentElement,
                        Object element) {
                    return element != UNKNOWN;
                }
            });

            ViewerSupport.bind(peopleViewer, viewModel.getPeople(),
                    BeanProperties.values(Person.class, new String[] { "name",
                            "mother.name", "father.name", "mother.mother.name",
                            "mother.father.name", "father.mother.name",
                            "father.father.name" }));

            IObservableValue masterSelection = ViewerProperties
                    .singleSelection().observe(peopleViewer);

            dbc.bindValue(WidgetProperties.text(SWT.Modify).observe(nameText),
                    BeanProperties.value(Person.class, "name").observeDetail(
                            masterSelection));

            ComboViewer mothercomboViewer = new ComboViewer(motherCombo);
            ViewerSupport.bind(mothercomboViewer, viewModel.getPeople(),
                    BeanProperties.value(Person.class, "name"));

            dbc.bindValue(ViewerProperties.singleSelection().observe(
                    mothercomboViewer), BeanProperties.value(Person.class,
                    "mother").observeDetail(masterSelection));

            ComboViewer fatherComboViewer = new ComboViewer(fatherCombo);
            ViewerSupport.bind(fatherComboViewer, viewModel.getPeople(),
                    BeanProperties.value(Person.class, "name"));

            dbc.bindValue(ViewerProperties.singleSelection().observe(
                    fatherComboViewer), BeanProperties.value(Person.class,
                    "father").observeDetail(masterSelection));
        }
    }
}
void main( String[] args ){
    Snippet025TableViewerWithPropertyDerivedColumns.main(args);
}