FilePreview.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.file.zul.tree;
 
import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;
import org.turro.preview.Preview;
import org.zkoss.zk.ui.event.EventListener;
import org.zkoss.zk.ui.event.Events;
import org.zkoss.zk.ui.event.OpenEvent;
import org.zkoss.zul.Image;
import org.zkoss.zul.Popup;
 
public class FilePreview extends Popup implements EventListener<OpenEvent> {
 
  private File file;
 
  public FilePreview(File file) {
    this.file = file;
    addEventListener(Events.ON_OPEN, this);
  }
 
  @Override
  public void onEvent(OpenEvent event) throws Exception {
    getChildren().clear();
    Preview preview = Preview.from(file);
    File result = preview.get();
    if(result != null) {
      BufferedImage bi = ImageIO.read(result);
      setHeight((bi.getHeight() + 12) + "px");
      setWidth((bi.getWidth() + 12) + "px");
      Image image = new Image();
      image.setContent(bi);
      appendChild(image);
      preview.close();
    }
  }
  
}