/************************************************************************************************************
 * Copyright (c) 2007 Matthew Hall 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:
 *      Matthew Hall - initial API and implementation (bug 180746)
 *      Boris Bokowski, IBM - initial API and implementation
 *      Matthew Hall - bugs 260329, 264286
 ***********************************************************************************************************/
module org.eclipse.jface.examples.databinding.snippets.Snippet015DelayTextModifyEvents;

import java.lang.all;

import org.eclipse.core.databinding.DataBindingContext;
import org.eclipse.core.databinding.observable.Observables;
import org.eclipse.core.databinding.observable.Realm;
import org.eclipse.core.databinding.observable.value.IObservableValue;
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.internal.databinding.provisional.swt.ControlUpdater;
import org.eclipse.jface.layout.GridDataFactory;
import org.eclipse.jface.resource.FontDescriptor;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.resource.LocalResourceManager;
import org.eclipse.jface.resource.ResourceManager;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.layout.GridLayout;
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.Text;

public class Snippet015DelayTextModifyEvents {

    private static void createControls(Shell shell) {
        final Label field1 = createLabel(shell, SWT.NONE, "Field 1 ");

        Text text1 = new Text(shell, SWT.BORDER);
        GridDataFactory.fillDefaults().grab(true, false).hint(200, SWT.DEFAULT)
                .applyTo(text1);
        createLabel(shell, SWT.NONE, "200ms delay");

        final Label field2 = createLabel(shell, SWT.NONE, "Field 2 ");

        Text text2 = new Text(shell, SWT.BORDER);
        GridDataFactory.fillDefaults().grab(true, false).hint(200, SWT.DEFAULT)
                .applyTo(text2);

        createLabel(shell, SWT.NONE, "1000ms delay");

        final ISWTObservableValue delayed1 = WidgetProperties.text(SWT.Modify)
                .observeDelayed(200, text1);
        final ISWTObservableValue delayed2 = WidgetProperties.text(SWT.Modify)
                .observeDelayed(1000, text2);

        // (In a real application,you would want to dispose the resource manager
        // when you are done with it)
        ResourceManager resourceManager = new LocalResourceManager(
                JFaceResources.getResources());
        final Font shellFont = shell.getFont();
        final Font italicFont = resourceManager.createFont(FontDescriptor
                .createFrom(shellFont).setStyle(SWT.ITALIC));

        final IObservableValue stale1 = Observables.observeStale(delayed1);
        new ControlUpdater(field2) {
            protected void updateControl() {
                bool stale = ((bool) stale1.getValue()).booleanValue();
                field2.setFont(stale ? italicFont : shellFont);
            }
        };

        final IObservableValue stale2 = Observables.observeStale(delayed2);
        new ControlUpdater(field1) {
            protected void updateControl() {
                bool stale = ((bool) stale2.getValue()).booleanValue();
                field1.setFont(stale ? italicFont : shellFont);
            }
        };

        String info = "Pending changes are applied immediately if the observed control loses focus";
        GridDataFactory.fillDefaults().span(3, 1).applyTo(
                createLabel(shell, SWT.WRAP, info));

        DataBindingContext dbc = new DataBindingContext();

        dbc.bindValue(delayed1, delayed2);
    }

    private static Label createLabel(Composite parent, int style, String text) {
        Label label = new Label(parent, style);
        label.setText(text);
        return label;
    }

    public static void main(String[] args) {
        final Display display = new Display();

        Realm.runWithDefault(SWTObservables.getRealm(display), new Runnable() {
            public void run() {
                Shell shell = new Shell();
                shell.setLayout(new GridLayout(3, false));

                createControls(shell);

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

        });

        display.dispose();
    }

}
void main( String[] args ){
    Snippet015DelayTextModifyEvents.main(args);
}