001/*
002 * #%L
003 * GwtMaterial
004 * %%
005 * Copyright (C) 2015 - 2017 GwtMaterialDesign
006 * %%
007 * Licensed under the Apache License, Version 2.0 (the "License");
008 * you may not use this file except in compliance with the License.
009 * You may obtain a copy of the License at
010 * 
011 *      http://www.apache.org/licenses/LICENSE-2.0
012 * 
013 * Unless required by applicable law or agreed to in writing, software
014 * distributed under the License is distributed on an "AS IS" BASIS,
015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016 * See the License for the specific language governing permissions and
017 * limitations under the License.
018 * #L%
019 */
020package gwt.material.design.addins.client.combobox.events;
021
022import com.google.gwt.event.shared.EventHandler;
023import com.google.gwt.event.shared.GwtEvent;
024import gwt.material.design.addins.client.combobox.base.HasUnselectItemHandler;
025
026import java.util.List;
027
028/**
029 * Combobox event fired once user removes an item from multiple list selection.
030 *
031 * @author kevzlou7979
032 */
033public class SelectItemEvent<T> extends GwtEvent<SelectItemEvent.SelectComboHandler<T>> {
034
035    private static Type<SelectComboHandler<?>> TYPE;
036
037    public interface SelectComboHandler<T> extends EventHandler {
038        void onSelectItem(SelectItemEvent<T> event);
039    }
040
041    public static <T> void fire(HasUnselectItemHandler<T> source, List<T> values) {
042        if (TYPE != null) {
043            source.fireEvent(new SelectItemEvent<>(values));
044        }
045    }
046
047    public static Type<SelectComboHandler<?>> getType() {
048        return TYPE != null ? TYPE : (TYPE = new Type<>());
049    }
050
051    private final List<T> values;
052
053    protected SelectItemEvent(List<T> values) {
054        this.values = values;
055    }
056
057    @Override
058    public final Type<SelectComboHandler<T>> getAssociatedType() {
059        return (Type) TYPE;
060    }
061
062    public List<T> getSelectedValues() {
063        return values;
064    }
065
066    @Override
067    protected void dispatch(SelectComboHandler<T> handler) {
068        handler.onSelectItem(this);
069    }
070}