/*******************************************************************************
 * Copyright (c) 2006 Brad Reynolds 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:
 *     Brad Reynolds - initial API and implementation
 *     IBM Corporation - see bug 137934
 ******************************************************************************/

module org.eclipse.jface.examples.databinding.snippets.Snippet007ColorLabelProvider;

import java.lang.all;

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

import org.eclipse.core.databinding.beans.BeansObservables;
import org.eclipse.core.databinding.observable.Observables;
import org.eclipse.core.databinding.observable.Realm;
import org.eclipse.core.databinding.observable.list.IObservableList;
import org.eclipse.core.databinding.observable.map.IObservableMap;
import org.eclipse.jface.databinding.swt.SWTObservables;
import org.eclipse.jface.databinding.viewers.ObservableListContentProvider;
import org.eclipse.jface.databinding.viewers.ObservableMapLabelProvider;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.ITableColorProvider;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;

/**
 * An example showing how to create a {@link ILabelProvider label provider} that
 * to provide colors.
 * 
 * @since 3.2
 */
public class Snippet007ColorLabelProvider {
    /**
     * @param args
     */
    public static void main(String[] args) {
        final List persons = new ArrayList();
        persons.add(new Person("Fiona Apple", Person.FEMALE));
        persons.add(new Person("Elliot Smith", Person.MALE));
        persons.add(new Person("Diana Krall", Person.FEMALE));
        persons.add(new Person("David Gilmour", Person.MALE));

        final Display display = new Display();
        Realm.runWithDefault(SWTObservables.getRealm(display), new Runnable() {
            public void run() {
                Shell shell = new Shell(display);
                shell.setText("Gender Bender");
                shell.setLayout(new GridLayout());

                Table table = new Table(shell, SWT.SINGLE | SWT.H_SCROLL
                        | SWT.V_SCROLL | SWT.BORDER);
                GridData gridData = new GridData(SWT.FILL, SWT.FILL, true, true);
                table.setLayoutData(gridData);
                table.setHeaderVisible(true);
                table.setLinesVisible(true);
                TableColumn column = new TableColumn(table, SWT.NONE);
                column.setText("No");
                column.setWidth(20);
                column = new TableColumn(table, SWT.NONE);
                column.setText("Name");
                column.setWidth(100);
                final TableViewer viewer = new TableViewer(table);

                IObservableList observableList = Observables
                        .staticObservableList(persons);
                ObservableListContentProvider contentProvider = new ObservableListContentProvider();

                viewer.setContentProvider(contentProvider);

                // this does not have to correspond to the columns in the table,
                // we just list all attributes that affect the table content.
                IObservableMap[] attributes = BeansObservables.observeMaps(
                        contentProvider.getKnownElements(), Person.class,
                        new String[] { "name", "gender" });

                class ColorLabelProvider extends ObservableMapLabelProvider
                        implements ITableColorProvider {
                    Color male = display.getSystemColor(SWT.COLOR_BLUE);

                    Color female = new Color(display, 255, 192, 203);

                    ColorLabelProvider(IObservableMap[] attributes) {
                        super(attributes);
                    }

                    // to drive home the point that attributes does not have to
                    // match
                    // the columns
                    // in the table, we change the column text as follows:
                    public String getColumnText(Object element, int index) {
                        if (index == 0) {
                            return Integer
                                    .toString(persons.indexOf(element) + 1);
                        }
                        return ((Person) element).getName();
                    }

                    public Color getBackground(Object element, int index) {
                        return null;
                    }

                    public Color getForeground(Object element, int index) {
                        if (index == 0)
                            return null;
                        Person person = (Person) element;
                        return (person.getGender() == Person.MALE) ? male
                                : female;
                    }

                    public void dispose() {
                        super.dispose();
                        female.dispose();
                    }
                }
                viewer.setLabelProvider(new ColorLabelProvider(attributes));

                viewer.setInput(observableList);

                table.getColumn(0).pack();

                Button button = new Button(shell, SWT.PUSH);
                button.setText("Toggle Gender");
                button.addSelectionListener(new SelectionAdapter() {
                    public void widgetSelected(SelectionEvent arg0) {
                        StructuredSelection selection = (StructuredSelection) viewer
                                .getSelection();
                        if (selection != null && !selection.isEmpty()) {
                            Person person = (Person) selection
                                    .getFirstElement();
                            person
                                    .setGender((person.getGender() == Person.MALE) ? Person.FEMALE
                                            : Person.MALE);
                        }
                    }
                });

                shell.setSize(300, 400);
                shell.open();

                while (!shell.isDisposed()) {
                    if (!display.readAndDispatch())
                        display.sleep();
                }
            }
        });
        display.dispose();
    }

    static class Person {
        static final int MALE = 0;

        static final int FEMALE = 1;

        private String name;

        private int gender;

        private PropertyChangeSupport changeSupport = new PropertyChangeSupport(
                this);

        Person(String name, int gender) {
            this.name = name;
            this.gender = gender;
        }

        /**
         * Returns the name. Method declared public to satisfy Java bean
         * conventions
         * 
         * @return the name
         */
        public String getName() {
            return name;
        }

        /**
         * @param listener
         */
        public void addPropertyChangeListener(PropertyChangeListener listener) {
            changeSupport.addPropertyChangeListener(listener);
        }

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

        /**
         * Returns the gender. Method declared public to satisfy Java bean
         * conventions
         * 
         * @return the gender
         */
        public int getGender() {
            return gender;
        }

        void setGender(int gender) {
            changeSupport.firePropertyChange("gender", this.gender,
                    this.gender = gender);
        }
    }
}

void main( String[] args ){
    Snippet007ColorLabelProvider.main(args);
}