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package com.tirsen.angkor.widget;
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import com.tirsen.angkor.Debug;
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import com.tirsen.angkor.RenderContext;
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import com.tirsen.angkor.View;
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import com.tirsen.angkor.Component;
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import com.tirsen.angkor.event.Action;
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import com.tirsen.angkor.event.ActionListener;
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import com.tirsen.angkor.event.ActionSource;
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import com.tirsen.angkor.event.ActionSourceHelper;
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import org.apache.log4j.Category;
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import java.io.IOException;
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/**
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* @author $Author: tirsen $
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* @version $Revision: 1.6 $
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* <BR>
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* $Id: ImageMap.java,v 1.6 2002/10/13 19:59:23 tirsen Exp $
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*/
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public class ImageMap extends Container
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{
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private static final Category logger = Category.getInstance(Debug.LOGGER_NAME);
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public void add(int index, View element)
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{
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if (element instanceof Area)
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super.add(index, element);
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else
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throw new IllegalArgumentException("A image-map can only contain ImageMap.Areas");
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}
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public static class Area extends Component implements ActionSource
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{
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private ActionSourceHelper actionSourceHelper = new ActionSourceHelper(this);
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private int x1,y1,x2,y2;
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public Area(Action action, int x1, int y1, int x2, int y2)
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{
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actionSourceHelper.setAction(action);
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this.x1 = x1;
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this.y1 = y1;
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this.x2 = x2;
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this.y2 = y2;
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}
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public String getAlt()
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{
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if (getAction() == null)
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return null;
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else
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return (String) getAction().getValue(Action.NAME);
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}
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public void render(RenderContext context) throws IOException
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{
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logger.debug(">>> Area.render");
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context.emptyTag("area href=\"" + context.getRequestPath() + "?" + uniqueId(context) + "=clicked\" " +
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((getAlt() == null) ? "" : ("alt=\"" + getAlt() + "\" ")) +
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"coords=\"" + x1 + "," + y1 + "," + x2 + "," + y2 + "\"");
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context.registerParsingComponent(this);
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logger.debug("<<< Area.render");
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}
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public boolean isParsing()
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{
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return true;
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}
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public void parse(RenderContext context)
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{
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super.parse(context);
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if (context.getRequestParameter(getId()) != null)
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{
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actionSourceHelper.signalActionEvent(context);
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}
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}
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public void removeActionListener(ActionListener listener)
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{
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actionSourceHelper.removeActionListener(listener);
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}
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public void addActionListener(ActionListener listener)
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{
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actionSourceHelper.addActionListener(listener);
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}
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public void setAction(Action action)
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{
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actionSourceHelper.setAction(action);
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}
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public Action getAction()
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{
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return actionSourceHelper.getAction();
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}
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public void signalActionEvent()
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{
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actionSourceHelper.signalActionEvent();
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}
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}
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public void render(RenderContext context) throws IOException
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{
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logger.debug(">>> ImageMap.render");
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context.startTag("map name=\"" + uniqueId(context) + "\"");
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renderChildren(context);
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context.endTag("map");
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logger.debug("<<< ImageMap.render");
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}
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}
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