com.arcbees.chosen.integrationtest.client.testcases.SimpleMultiValueListBoxOnChange.java Source code

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Here is the source code for com.arcbees.chosen.integrationtest.client.testcases.SimpleMultiValueListBoxOnChange.java

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/*
 * Copyright 2015 ArcBees Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package com.arcbees.chosen.integrationtest.client.testcases;

import java.util.List;

import com.arcbees.chosen.client.ChosenOptions;
import com.arcbees.chosen.integrationtest.client.domain.CarBrand;
import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.RootPanel;

public class SimpleMultiValueListBoxOnChange extends SimpleMultiValueListBox {
    public static final String PLACEHOLDER = "Some placeholder";
    public static final String LABEL_ID = "SimpleMultiValueListBoxOnChange-label";

    public SimpleMultiValueListBoxOnChange() {
        super(createChosenOption());
    }

    @Override
    public void run() {
        super.run();

        final Label label = new Label();
        label.getElement().setId(LABEL_ID);

        getListBox().addValueChangeHandler(new ValueChangeHandler<List<CarBrand>>() {
            @Override
            public void onValueChange(ValueChangeEvent<List<CarBrand>> event) {
                label.setText(joinValues(event.getValue()));
            }
        });

        RootPanel.get().add(label);
    }

    private String joinValues(List<CarBrand> value) {
        if (value.isEmpty()) {
            return "";
        } else if (value.size() == 1) {
            return value.get(0).name();
        } else {
            String result = value.get(0).name();
            for (int i = 1; i < value.size(); i++) {
                result += ", " + value.get(i).name();
            }

            return result;
        }
    }

    private static ChosenOptions createChosenOption() {
        ChosenOptions chosenOptions = new ChosenOptions();
        chosenOptions.setPlaceholderText(PLACEHOLDER);
        chosenOptions.setAllowSingleDeselect(true);

        return chosenOptions;
    }
}