org.ripla.web.demo.widgets.views.SelectionWidgetsView.java Source code

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Here is the source code for org.ripla.web.demo.widgets.views.SelectionWidgetsView.java

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/*******************************************************************************
 * Copyright (c) 2012-2013 RelationWare, Benno Luthiger
 * 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:
 * RelationWare, Benno Luthiger
 ******************************************************************************/

package org.ripla.web.demo.widgets.views;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Random;

import org.ripla.interfaces.IMessages;
import org.ripla.web.demo.widgets.Activator;
import org.ripla.web.demo.widgets.data.CountryContainer;

import com.vaadin.data.Property;
import com.vaadin.data.Property.ValueChangeEvent;
import com.vaadin.shared.ui.combobox.FilteringMode;
import com.vaadin.ui.AbstractSelect.ItemCaptionMode;
import com.vaadin.ui.ComboBox;
import com.vaadin.ui.HorizontalLayout;
import com.vaadin.ui.ListSelect;
import com.vaadin.ui.Notification;
import com.vaadin.ui.OptionGroup;
import com.vaadin.ui.TwinColSelect;
import com.vaadin.ui.VerticalLayout;

/**
 * The view to display the Vaadin selection widgets.
 * 
 * @author Luthiger
 */
@SuppressWarnings("serial")
public class SelectionWidgetsView extends AbstractWidgetsView {
    private static final int OPTION_SIZE = 10;

    public SelectionWidgetsView(final CountryContainer inCountries) {
        super();

        final IMessages lMessages = Activator.getMessages();
        final VerticalLayout lLayout = initLayout(lMessages, "widgets.title.page.select"); //$NON-NLS-1$

        final HorizontalLayout lColumns = new HorizontalLayout();
        lColumns.setSpacing(true);
        lLayout.addComponent(lColumns);

        final VerticalLayout lCol1 = new VerticalLayout();
        lCol1.setSizeUndefined();
        lColumns.addComponent(lCol1);
        final VerticalLayout lCol2 = new VerticalLayout();
        lCol2.setSizeUndefined();
        lColumns.addComponent(lCol2);
        final VerticalLayout lCol3 = new VerticalLayout();
        lCol3.setSizeUndefined();
        lColumns.addComponent(lCol3);
        lColumns.setExpandRatio(lCol3, 1);

        lCol1.addComponent(getSubtitle(lMessages.getMessage("widgets.selection.subtitle.list"))); //$NON-NLS-1$
        final ListSelect lList1 = new ListSelect(null, inCountries);
        lList1.setItemCaptionMode(ItemCaptionMode.ID);
        lList1.setRows(10);
        lList1.setMultiSelect(true);
        lList1.setNullSelectionAllowed(false);
        lList1.select(inCountries.getIdByIndex(0));
        lList1.setImmediate(true);
        lList1.addValueChangeListener(new Listener());
        lCol1.addComponent(lList1);

        lCol1.addComponent(getSubtitle(lMessages.getMessage("widgets.selection.subtitle.combox"))); //$NON-NLS-1$
        final ComboBox lCombo = new ComboBox(null, inCountries);
        lCombo.setInputPrompt(lMessages.getMessage("widgets.selection.combox.prompt")); //$NON-NLS-1$
        lCombo.setNullSelectionAllowed(false);
        lCombo.setFilteringMode(FilteringMode.STARTSWITH);
        lCombo.setImmediate(true);
        lCombo.addValueChangeListener(new Listener());
        lCol1.addComponent(lCombo);

        lCol2.addComponent(getSubtitle(lMessages.getMessage("widgets.selection.subtitle.options.single"))); //$NON-NLS-1$
        List<String> lCountries = getRandomSubset(inCountries, OPTION_SIZE, System.currentTimeMillis());
        final OptionGroup lOptions1 = new OptionGroup(null, lCountries);
        lOptions1.setNullSelectionAllowed(false);
        lOptions1.select(lCountries.get(0));
        lOptions1.setImmediate(true);
        lOptions1.addValueChangeListener(new Listener());
        lCol2.addComponent(lOptions1);

        lCol2.addComponent(getSubtitle(lMessages.getMessage("widgets.selection.subtitle.options.multiple"))); //$NON-NLS-1$
        lCountries = getRandomSubset(inCountries, OPTION_SIZE, System.currentTimeMillis() + 2000);
        final OptionGroup lOptions2 = new OptionGroup(null, lCountries);
        lOptions2.setNullSelectionAllowed(false);
        lOptions2.setMultiSelect(true);
        lOptions2.select(lCountries.get(0));
        lOptions2.setImmediate(true);
        lOptions2.addValueChangeListener(new Listener());
        lCol2.addComponent(lOptions2);

        lCol3.addComponent(getSubtitle(lMessages.getMessage("widgets.selection.subtitle.twin"))); //$NON-NLS-1$
        final TwinColSelect lCountrySelect = new TwinColSelect();
        lCountrySelect.setContainerDataSource(inCountries);
        lCountrySelect.setRows(OPTION_SIZE);
        lCountrySelect.setNullSelectionAllowed(true);
        lCountrySelect.setMultiSelect(true);
        lCountrySelect.setWidth(400, Unit.PIXELS);
        lCol3.addComponent(lCountrySelect);
    }

    private List<String> getRandomSubset(final CountryContainer inCountries, final int inLength,
            final long inSeed) {
        final List<String> out = new ArrayList<String>();

        final int lLength = inCountries.getItemIds().size();
        final Random lRandom = new Random(inSeed);

        for (int i = 0; i < inLength; i++) {
            out.add(inCountries.getIdByIndex(lRandom.nextInt(lLength)).getName());
        }
        Collections.sort(out);
        return out;
    }

    private class Listener implements Property.ValueChangeListener {
        @Override
        public void valueChange(final ValueChangeEvent inEvent) {
            Notification.show(Activator.getMessages().getMessage("widgets.selection.feedback") //$NON-NLS-1$
                    + inEvent.getProperty().toString());
        }
    }

}