org.eclipse.riena.sample.snippets.SnippetComboRidget003.java Source code

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Here is the source code for org.eclipse.riena.sample.snippets.SnippetComboRidget003.java

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/*******************************************************************************
 * Copyright (c) 2007, 2013 compeople AG 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:
 *    compeople AG - initial API and implementation
 *******************************************************************************/
package org.eclipse.riena.sample.snippets;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.core.databinding.observable.list.IObservableList;
import org.eclipse.core.databinding.observable.list.WritableList;
import org.eclipse.jface.databinding.swt.SWTObservables;
import org.eclipse.jface.layout.GridDataFactory;
import org.eclipse.jface.layout.GridLayoutFactory;
import org.eclipse.swt.custom.CCombo;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;

import org.eclipse.riena.ui.ridgets.IActionListener;
import org.eclipse.riena.ui.ridgets.IActionRidget;
import org.eclipse.riena.ui.ridgets.IComboRidget;
import org.eclipse.riena.ui.ridgets.swt.DefaultRealm;
import org.eclipse.riena.ui.ridgets.swt.SwtRidgetFactory;
import org.eclipse.riena.ui.swt.utils.UIControlsFactory;

/**
 * Designating a 'placeholder' item that is equivalent to no selection.
 */
public class SnippetComboRidget003 {

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

        try {
            final Shell shell = UIControlsFactory.createShell(display);
            shell.setText(SnippetComboRidget003.class.getSimpleName());
            GridLayoutFactory.swtDefaults().numColumns(2).spacing(5, 5).applyTo(shell);

            UIControlsFactory.createLabel(shell, "CCombo:"); //$NON-NLS-1$
            final CCombo ccombo = UIControlsFactory.createCCombo(shell);

            UIControlsFactory.createLabel(shell, "Selection:"); //$NON-NLS-1$
            final Label lblSelection = UIControlsFactory.createLabel(shell, ""); //$NON-NLS-1$

            final Button button = UIControlsFactory.createButton(shell, "&Reset"); //$NON-NLS-1$
            GridDataFactory.fillDefaults().span(2, 1).applyTo(button);

            // data model
            final String emptySelection = "<no selection>"; //$NON-NLS-1$
            final IObservableList input = createInput(emptySelection);

            final IComboRidget ccomboRidget = (IComboRidget) SwtRidgetFactory.createRidget(ccombo);
            ccomboRidget.setMandatory(true);
            ccomboRidget.setEmptySelectionItem(emptySelection);
            ccomboRidget.bindToModel(input, String.class, null, SWTObservables.observeText(lblSelection));
            ccomboRidget.updateFromModel();

            final IActionRidget actionRidget = (IActionRidget) SwtRidgetFactory.createRidget(button);
            actionRidget.addListener(new IActionListener() {
                public void callback() {
                    ccomboRidget.setSelection(emptySelection);
                }
            });

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

    private static IObservableList createInput(final String emptySelection) {
        final List<String> days = new ArrayList<String>();
        final String[] values = new String[] { emptySelection, "Monday", "Tuesday", "Wednesday", "Thursday", //$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$//$NON-NLS-4$
                "Friday", "Saturday", //$NON-NLS-1$ //$NON-NLS-2$
                "Sunday" }; //$NON-NLS-1$
        for (final String day : values) {
            days.add(day);
        }
        return new WritableList(days, String.class);
    }

}