com.esofthead.mycollab.vaadin.ui.DefaultMassItemActionHandlersContainer.java Source code

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Here is the source code for com.esofthead.mycollab.vaadin.ui.DefaultMassItemActionHandlersContainer.java

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/**
 * This file is part of mycollab-web.
 *
 * mycollab-web is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * mycollab-web is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with mycollab-web.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.esofthead.mycollab.vaadin.ui;

import java.io.InputStream;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

import org.vaadin.maddon.layouts.MHorizontalLayout;
import org.vaadin.peter.buttongroup.ButtonGroup;

import com.esofthead.mycollab.vaadin.events.HasMassItemActionHandlers;
import com.esofthead.mycollab.vaadin.events.MassItemActionHandler;
import com.vaadin.server.FileDownloader;
import com.vaadin.server.Resource;
import com.vaadin.server.StreamResource;
import com.vaadin.server.StreamResource.StreamSource;
import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.HorizontalLayout;

/**
 * 
 * @author MyCollab Ltd.
 * @since 3.0
 * 
 */
public class DefaultMassItemActionHandlersContainer extends MHorizontalLayout implements HasMassItemActionHandlers {

    private static final long serialVersionUID = 1L;

    private Set<MassItemActionHandler> handlers;

    private Map<String, ButtonGroup> groupMap = new HashMap<>();

    public void addActionItem(final String id, Resource resource, String groupId, String description) {
        ButtonGroup group = groupMap.get(groupId);

        if (group == null) {
            group = new ButtonGroup();
            groupMap.put(groupId, group);

            this.addComponent(group);
        }

        Button optionBtn = new Button(null, new Button.ClickListener() {
            private static final long serialVersionUID = 1L;

            @Override
            public void buttonClick(ClickEvent event) {
                changeOption(id);
            }
        });
        optionBtn.setIcon(resource);
        if ("delete".equals(groupId)) {
            optionBtn.addStyleName(UIConstants.THEME_RED_LINK);
        } else {
            optionBtn.addStyleName(UIConstants.THEME_BLUE_LINK);
        }
        optionBtn.addStyleName("small-padding");
        optionBtn.setDescription(description);

        group.addButton(optionBtn);
    }

    public void addDownloadActionItem(final String id, Resource resource, String groupId, String downloadFileName,
            String description) {
        ButtonGroup group = groupMap.get(groupId);

        if (group == null) {
            group = new ButtonGroup();
            groupMap.put(groupId, group);
            this.addComponent(group);
        }

        Button optionBtn = new Button("");
        FileDownloader fileDownler = new FileDownloader(
                new StreamResource(new LazyStreamSource(id), downloadFileName));
        fileDownler.extend(optionBtn);
        optionBtn.setIcon(resource);
        optionBtn.addStyleName(UIConstants.THEME_BLUE_LINK);
        optionBtn.addStyleName("small-padding");
        optionBtn.setDescription(description);
        group.addButton(optionBtn);
    }

    private void changeOption(String id) {
        if (handlers != null) {
            for (MassItemActionHandler handler : handlers) {
                handler.onSelect(id);
            }
        }
    }

    private class LazyStreamSource implements StreamSource {
        private static final long serialVersionUID = 1L;
        private String id;

        public LazyStreamSource(String id) {
            this.id = id;
        }

        @Override
        public InputStream getStream() {
            return buildStreamResource(id).getStreamSource().getStream();
        }
    }

    protected StreamResource buildStreamResource(String id) {
        if (handlers != null) {
            for (MassItemActionHandler handler : handlers) {
                StreamResource streamResource = handler.buildStreamResource(id);
                if (streamResource != null) {
                    return streamResource;
                }
            }
        }

        return null;
    }

    @Override
    public void addMassItemActionHandler(MassItemActionHandler handler) {
        if (handlers == null) {
            handlers = new HashSet<>();
        }
        handlers.add(handler);

    }
}