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package com.tirsen.angkor.widget;
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import com.tirsen.angkor.Controller;
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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.ViewLink;
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import com.tirsen.angkor.Component;
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import com.tirsen.angkor.event.AbstractAction;
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import com.tirsen.angkor.event.Action;
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import com.tirsen.angkor.event.ActionEvent;
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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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* This has essentially been refactored into something almost exactly similar to {@link Link}.
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* TODO refactor this into Link and remove this class and all its uses.
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*
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* <!-- $Id: MenuItem.java,v 1.6 2002/10/13 19:59:23 tirsen Exp $ -->
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* <!-- $Author: tirsen $ -->
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*
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* @author Jon Tirsén (tirsen@users.sourceforge.net)
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* @version $Revision: 1.6 $
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*/
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public class MenuItem extends Component implements ActionSource
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{
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private static final Category logger = Category.getInstance(Debug.LOGGER_NAME);
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private String text;
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private ActionSourceHelper actionSourceHelper = new ActionSourceHelper(this);
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public MenuItem(Action action)
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{
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setAction(action);
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}
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/**
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* The specified text or if specified text is <code>null</code> the name of the action.
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*/
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public String getText()
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{
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String ret = text;
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if (ret == null && getAction() != null) ret = (String) getAction().getValue(Action.NAME);
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return ret;
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}
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public void setText(String text)
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{
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this.text = text;
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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 ("clicked".equals(context.getRequestParameter(getId())))
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{
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click(context);
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}
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}
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public static class GotoAction extends AbstractAction
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{
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private ViewLink link;
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private String linkName;
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private Controller target;
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public GotoAction(String linkName, Controller target)
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{
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super(target.getDisplayName());
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this.linkName = linkName;
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this.target = target;
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}
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public GotoAction(ViewLink link, Controller target)
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{
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super(target.getDisplayName());
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this.link = link;
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this.target = target;
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}
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public void actionPerformed(ActionEvent evt)
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{
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logger.debug("going to " + target);
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if (linkName != null) target.getApplication().relink(linkName, target);
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if (link != null) link.relink(target);
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}
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public boolean isViewShown()
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{
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boolean result = false;
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if (target == null)
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result = false;
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else if (linkName != null)
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result = (target == target.getApplication().getComponent(linkName));
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else if (link != null) result = target == link.getTarget();
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return result;
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}
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public boolean isEnabled()
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{
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return super.isEnabled() && !isViewShown();
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}
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}
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public void click(RenderContext context)
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{
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logger.info("" + this + " was clicked.");
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actionSourceHelper.signalActionEvent(context);
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}
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public void render(RenderContext context) throws IOException
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{
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if (isVisible())
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{
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if (!isEnabled())
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{
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// render as disabled
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context.startTag("SPAN id=\"" + uniqueId(context) + "\"");
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context.println(getText());
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context.endTag("SPAN");
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}
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else
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{
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String url = context.requestURL(uniqueId(context) + "=clicked");
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context.startTag("A id=\"" + uniqueId(context) + "\" href=\"" + url + "\"");
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context.println(getText());
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context.endTag("A");
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context.registerParsingComponent(this);
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}
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context.println(" ");
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}
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}
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public boolean isEnabled()
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{
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return getAction().isEnabled();
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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 setAction(Action action)
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{
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actionSourceHelper.setAction(action);
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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 removeActionListener(ActionListener listener)
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{
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actionSourceHelper.removeActionListener(listener);
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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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