/*--------------------------------------------------------------------------
    *  Copyright 2009 utgenome.org
    *
    *  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.
   *--------------------------------------------------------------------------*/
  //--------------------------------------
  // utgb-core Project
  //
  // GenomeTrack.java
  // Since: Feb 17, 2009
  //
  // $URL: http://svn.utgenome.org/utgb/trunk/utgb/utgb-core/src/main/java/org/utgenome/gwt/utgb/client/track/lib/GenomeTrack.java $ 
  // $Author: leo $
  //--------------------------------------
  package org.utgenome.gwt.utgb.client.track.lib;
  
  import org.utgenome.gwt.utgb.client.bio.Coordinate;
  import org.utgenome.gwt.utgb.client.db.datatype.StringType;
  import org.utgenome.gwt.utgb.client.track.Design;
  import org.utgenome.gwt.utgb.client.track.Track;
  import org.utgenome.gwt.utgb.client.track.TrackBase;
  import org.utgenome.gwt.utgb.client.track.TrackConfig;
  import org.utgenome.gwt.utgb.client.track.TrackConfigChange;
  import org.utgenome.gwt.utgb.client.track.TrackFrame;
  import org.utgenome.gwt.utgb.client.track.TrackGroup;
  import org.utgenome.gwt.utgb.client.track.TrackGroupPropertyChange;
  import org.utgenome.gwt.utgb.client.track.TrackWindow;
  import org.utgenome.gwt.utgb.client.track.UTGBProperty;
  import org.utgenome.gwt.utgb.client.util.CanonicalProperties;
  import org.utgenome.gwt.utgb.client.util.Properties;
  import org.utgenome.gwt.widget.client.Style;
  
  import com.google.gwt.event.dom.client.ErrorEvent;
  import com.google.gwt.event.dom.client.ErrorHandler;
  import com.google.gwt.event.dom.client.LoadEvent;
  import com.google.gwt.event.dom.client.LoadHandler;
  import com.google.gwt.user.client.DOM;
  import com.google.gwt.user.client.Event;
  import com.google.gwt.user.client.ui.FlexTable;
  import com.google.gwt.user.client.ui.Frame;
  import com.google.gwt.user.client.ui.Image;
  import com.google.gwt.user.client.ui.Widget;
  
  /**
   * GenomeTrack is for visualizing data that can be located on genome sequences.
   * 
   * @author yoshimura
   * 
   */
  
  public class GenomeTrackTextTest extends TrackBase {
  
  	private String type = "image";
  	private String trackBaseURL;
  	private int leftMargin = 0;
  	private FlexTable layoutPanel = new FlexTable();
  	private Image trackImage = new Image();
  	private Frame frame = new Frame();
  	private boolean isWidgetReady = false;
  
  	private TrackConfig config = new TrackConfig(this);
  
  	public static TrackFactory factory() {
  		return new TrackFactory() {
  			public Track newInstance() {
  				return new GenomeTrackTextTest();
  			}
  		};
  	}
  
  	private class ContentFrame extends Frame {
  		@Override
  		protected void onLoad() {
  		}
  
  		@Override
  		public void onBrowserEvent(Event event) {
  
  			if (event.getTypeInt() == Event.ONCHANGE) {
  				TrackFrame frame = getFrame();
  				if (frame != null) {
  					frame.loadingDone();
  				}
  			}
  		}
  	}
  
  	public GenomeTrackTextTest() {
  		super("Genome Track");
 
 		Style.fullWidth(layoutPanel);
 		layoutPanel.setCellPadding(0);
 		layoutPanel.setCellSpacing(0);
 		Style.fontSize(layoutPanel, 0);
 
 		Style.fullWidth(frame);
 		Style.margin(frame, 0);
 		Style.padding(frame, 0);
 		DOM.setElementProperty(frame.getElement(), "align", "left");
 		DOM.setElementPropertyInt(frame.getElement(), "marginHight", 0);
 		DOM.setElementPropertyInt(frame.getElement(), "marginWidth", 0);
 		DOM.setElementPropertyInt(frame.getElement(), "frameBorder", 0);
 
 	}
 
 	public Widget getWidget() {
 		return layoutPanel;
 	}
 
 	@Override
 	public void draw() {
 
 		layoutPanel.getCellFormatter().setWidth(0, 0, leftMargin + "px");
 
 		String trackURL = getTrackURL();
 		if (type.equals("frame")) {
 			if (!isWidgetReady) {
 				layoutPanel.setWidget(0, 1, frame);
 				isWidgetReady = true;
 			}
 			frame.setUrl(trackURL);
 		}
 		else if (type.equals("image")) {
 			// use image 
 			if (!isWidgetReady) {
 				layoutPanel.setWidget(0, 1, trackImage);
 				isWidgetReady = true;
 			}
 			trackImage.setUrl(getTrackURL());
 			getFrame().setNowLoading();
 		}
 	}
 
 	private String getTrackURL() {
 		Coordinate c = getCoordinate();
 
 		Properties p = new Properties();
 		TrackWindow w = getTrackGroup().getTrackWindow();
 		p.add("start", w.getStartOnGenome());
 		p.add("end", w.getEndOnGenome());
 		p.add("width", w.getPixelWidth() - leftMargin);
 
 		return c.getTrackURL(trackBaseURL, p);
 	}
 
 	@Override
 	public TrackConfig getConfig() {
 		return config;
 	}
 
 	@Override
 	public void setUp(TrackFrame trackFrame, TrackGroup group) {
 
 		trackImage.addLoadHandler(new LoadHandler() {
 			public void onLoad(LoadEvent arg0) {
 				getFrame().onUpdateTrackWidget();
 				getFrame().loadingDone();
 			}
 		});
 		trackImage.addErrorHandler(new ErrorHandler() {
 			public void onError(ErrorEvent arg0) {
 				trackImage.setUrl(Design.IMAGE_NOT_AVAILABLE);
 				getFrame().loadingDone();
 			}
 		});
 
 		int height = this.getDefaultWindowHeight();
 		if (height > 0) {
 			frame.setHeight(height + "px");
 			layoutPanel.setHeight(height + "px");
 		}
 
 		// set up the configuration panel
 		config.addConfig("Track Base URL", new StringType("baseURL"), trackBaseURL);
 
 	}
 
 	@Override
 	public void onChangeTrackGroupProperty(TrackGroupPropertyChange change) {
 
 		if (change.containsOneOf(UTGBProperty.coordinateParameters)) {
 			draw();
 		}
 	}
 
 	@Override
 	public void onChangeTrackWindow(TrackWindow newWindow) {
 		draw();
 	}
 
 	@Override
 	public void onChangeTrackConfig(TrackConfigChange change) {
 		if (change.contains("baseURL")) {
 			trackBaseURL = change.getValue("baseURL");
 			draw();
 		}
 	}
 
 	@Override
 	public void saveProperties(CanonicalProperties saveData) {
 		saveData.add("type", type);
 		saveData.add("trackBaseURL", trackBaseURL);
 		saveData.add("leftMargin", leftMargin);
 
 	}
 
 	@Override
 	public void restoreProperties(CanonicalProperties properties) {
 		trackBaseURL = properties.get("trackBaseURL", trackBaseURL);
 		leftMargin = properties.getInt("leftMargin", leftMargin);
 		type = properties.get("type", type);
 	}
 
 }