/*******************************************************************************
 * Copyright (c) 2008 IBM Corporation 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 Corporation - initial API and implementation
 ******************************************************************************/

module org.eclipse.jface.examples.databinding.snippets.Snippet023ConditionalVisibility;

import java.lang.all;

import org.eclipse.core.databinding.observable.Realm;
import org.eclipse.jface.databinding.swt.ISWTObservableValue;
import org.eclipse.jface.databinding.swt.SWTObservables;
import org.eclipse.jface.internal.databinding.provisional.swt.ControlUpdater;
import org.eclipse.jface.layout.GridLayoutFactory;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.StackLayout;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
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.Text;

/**
 * @since 3.2
 * 
 */
public class Snippet023ConditionalVisibility {
    public static void main(String[] args) {
        Display display = new Display();
        final Shell shell = new Shell(display);
        shell.setLayout(new GridLayout(1, false));

        Realm.runWithDefault(SWTObservables.getRealm(display), new Runnable() {
            public void run() {
                new Snippet023ConditionalVisibility().createControls(shell);
            }
        });

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

    Text text;
    Text toText;
    Text fromText;

    /**
     * @param shell
     */
    private void createControls(Shell shell) {
        Composite composite = new Composite(shell, SWT.NONE);
        Group radioGroup = new Group(composite, SWT.NONE);
        radioGroup.setText("Type");
        Button textButton = new Button(radioGroup, SWT.RADIO);
        textButton.setText("Text");
        Button rangeButton = new Button(radioGroup, SWT.RADIO);
        rangeButton.setText("Range");
        GridLayoutFactory.swtDefaults().generateLayout(radioGroup);

        final Composite oneOfTwo = new Composite(composite, SWT.NONE);
        final StackLayout stackLayout = new StackLayout();
        oneOfTwo.setLayout(stackLayout);

        final Group rangeGroup = new Group(oneOfTwo, SWT.NONE);
        rangeGroup.setText("Range");
        Label fromLabel = new Label(rangeGroup, SWT.NONE);
        fromLabel.setText("From:");
        fromText = new Text(rangeGroup, SWT.SINGLE | SWT.LEAD | SWT.BORDER);

        Label toLabel = new Label(rangeGroup, SWT.NONE);
        toLabel.setText("To:");
        toText = new Text(rangeGroup, SWT.SINGLE | SWT.LEAD | SWT.BORDER);
        GridLayoutFactory.swtDefaults().numColumns(2)
                .generateLayout(rangeGroup);

        final Group textGroup = new Group(oneOfTwo, SWT.NONE);
        textGroup.setText("Text");
        Label label = new Label(textGroup, SWT.NONE);
        label.setText("Text:");
        text = new Text(textGroup, SWT.SINGLE | SWT.LEAD | SWT.BORDER);
        GridLayoutFactory.swtDefaults().numColumns(2).generateLayout(textGroup);

        GridLayoutFactory.swtDefaults().numColumns(2).generateLayout(composite);

        final ISWTObservableValue rangeSelected = SWTObservables
                .observeSelection(rangeButton);
        final ISWTObservableValue textSelected = SWTObservables
                .observeSelection(textButton);

        // Note that ControlUpdater is not API.
        new ControlUpdater(oneOfTwo) {
            protected void updateControl() {
                if (((bool) rangeSelected.getValue()).booleanValue()) {
                    stackLayout.topControl = rangeGroup;
                    oneOfTwo.layout();
                } else if (((bool) textSelected.getValue()).booleanValue()) {
                    stackLayout.topControl = textGroup;
                    oneOfTwo.layout();
                }
            }
        };
    }
}
void main( String[] args ){
    Snippet023ConditionalVisibility.main(args);
}