org.eclipse.jface.examples.databinding.snippets.Snippet024SelectObservableValue.java Source code

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Here is the source code for org.eclipse.jface.examples.databinding.snippets.Snippet024SelectObservableValue.java

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/*******************************************************************************
 * Copyright (c) 2008, 2018 Matthew Hall and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     Matthew Hall - initial API and implementation (bug 249992)
 *     Matthew Hall - bug 260329
 *     Simon Scholz <simon.scholz@vogella.com> - Bug 434283
 ******************************************************************************/

package org.eclipse.jface.examples.databinding.snippets;

import org.eclipse.core.databinding.DataBindingContext;
import org.eclipse.core.databinding.observable.Realm;
import org.eclipse.core.databinding.observable.value.IObservableValue;
import org.eclipse.core.databinding.observable.value.SelectObservableValue;
import org.eclipse.jface.databinding.swt.DisplayRealm;
import org.eclipse.jface.databinding.swt.typed.WidgetProperties;
import org.eclipse.jface.databinding.viewers.typed.ViewerProperties;
import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.ListViewer;
import org.eclipse.swt.SWT;
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.Group;
import org.eclipse.swt.widgets.Shell;

/**
 * Demonstrate usage of SelectObservableValue
 *
 * @since 3.2
 */
public class Snippet024SelectObservableValue {
    protected Shell shell;

    public static void main(String[] args) {
        final Display display = Display.getDefault();
        Realm.runWithDefault(DisplayRealm.getRealm(display), () -> {
            try {
                Snippet024SelectObservableValue window = new Snippet024SelectObservableValue();
                window.open();
            } catch (Exception e) {
                e.printStackTrace();
            }
        });
    }

    public void open() {
        final Display display = Display.getDefault();
        createContents();
        shell.open();
        shell.layout();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
    }

    protected void createContents() {
        shell = new Shell();
        shell.setSize(400, 300);
        shell.setLayout(new GridLayout(2, true));
        shell.setText("Snippet024SelectObservableValue");

        final ListViewer listViewer = new ListViewer(shell, SWT.BORDER);
        listViewer.setContentProvider(new ArrayContentProvider());
        listViewer.getList().setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));

        final Group group = new Group(shell, SWT.NONE);
        group.setText("Radio Group");
        group.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
        group.setLayout(new GridLayout());

        // Data Binding
        Color[] colors = Color.values();

        listViewer.setInput(colors);
        IObservableValue<Color> listViewerSelection = ViewerProperties.singleSelection(Color.class)
                .observe(listViewer);

        SelectObservableValue<Color> radioGroup = new SelectObservableValue<>();
        for (Color color : colors) {
            Button button = new Button(group, SWT.RADIO);
            button.setText(color.toString());
            radioGroup.addOption(color, WidgetProperties.buttonSelection().observe(button));
        }

        DataBindingContext dbc = new DataBindingContext();
        dbc.bindValue(radioGroup, listViewerSelection);
    }

    public static class Color {
        public static final Color RED = new Color("Red");
        public static final Color ORANGE = new Color("Orange");
        public static final Color YELLOW = new Color("Yellow");
        public static final Color GREEN = new Color("Green");
        public static final Color BLUE = new Color("Blue");
        public static final Color INDIGO = new Color("Indigo");
        public static final Color VIOLET = new Color("Violet");

        private final String name;

        private Color(String name) {
            this.name = name;
        }

        @Override
        public String toString() {
            return name;
        }

        public static Color[] values() {
            return new Color[] { RED, ORANGE, YELLOW, GREEN, BLUE, INDIGO, VIOLET };
        }
    }
}