attach/zul/PreviewButton.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2012 Lluis Turró Cutiller <http://www.turro.org/>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
package org.turro.attach.zul;
 
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.File;
import javax.imageio.ImageIO;
import org.turro.attach.db.LoadContent;
import org.turro.attach.entity.Attachment;
import org.turro.elephant.util.Images;
import org.turro.i18n.I_;
import org.turro.preview.Preview;
import org.turro.zkoss.dialog.Windows;
import org.zkoss.zk.ui.event.Event;
import org.zkoss.zk.ui.event.EventListener;
import org.zkoss.zk.ui.event.Events;
import org.zkoss.zul.Image;
import org.zkoss.zul.Toolbarbutton;
 
public class PreviewButton extends Toolbarbutton implements EventListener<Event> {
 
  private final Attachment attachment;
 
  public PreviewButton(Attachment attachment) {
    this.attachment = attachment;
    setImage(Images.getImage("eye"));
    setTooltiptext(I_.get("Preview"));
    addEventListener(Events.ON_CLICK, this);
  }
 
  @Override
  public void onEvent(Event event) throws Exception {
    Preview preview = Preview.from(new ByteArrayInputStream(
            LoadContent.getContent(attachment)), attachment.getFileExtension());
    File result = preview.get();
    if(result != null) {
      BufferedImage bi = ImageIO.read(result);
      Image image = new Image();
      image.setContent(bi);
      Windows.title(attachment.getFileName())
              .page(getPage())
              .adaptWidth(bi.getWidth())
              .adaptHeight(bi.getHeight())
              .addComponent(image)
              .closeable()
              .onClose(w -> preview.close())
              .show();
    }
  }
  
}