diff -r 1612dbcec451 -r 639991d0808a java/cewolf-1.0/src/main/java/de/laures/cewolf/taglib/util/PageUtils.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/java/cewolf-1.0/src/main/java/de/laures/cewolf/taglib/util/PageUtils.java	Sat Feb 28 21:31:02 2009 +0100
@@ -0,0 +1,80 @@
+/* ================================================================
+ * Cewolf : Chart enabling Web Objects Framework
+ * ================================================================
+ *
+ * Project Info:  http://cewolf.sourceforge.net
+ * Project Lead:  Guido Laures (guido@laures.de);
+ *
+ * (C) Copyright 2002, by Guido Laures
+ *
+ * This library is free software; you can redistribute it and/or modify it under the terms
+ * of the GNU Lesser General Public License as published by the Free Software Foundation;
+ * either version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License along with this
+ * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+package de.laures.cewolf.taglib.util;
+
+import javax.servlet.jsp.PageContext;
+import javax.servlet.jsp.tagext.Tag;
+
+import org.jfree.data.general.Dataset;
+
+import de.laures.cewolf.ChartHolder;
+import de.laures.cewolf.DatasetProduceException;
+import de.laures.cewolf.taglib.tags.CewolfRootTag;
+
+/**
+ * Helper class to easily retrieve some objects of page context.
+ * @author  glaures
+ */
+public class PageUtils {
+    
+    private final static String TOOLTIPS_ENABLED_ATTR = PageUtils.class.getName() + ".ttenabled";
+    
+    /** Creates a new instance of ChartDefinitionFactory */
+    private PageUtils() {}
+    
+    public static ChartHolder getChartHolder(String chartId, PageContext ctx){
+        return (ChartHolder)ctx.getAttribute(chartId, PageContext.PAGE_SCOPE);
+    }
+    
+    public static final ChartHolder getChartHolder(Tag tag, PageContext ctx){
+        CewolfRootTag root = findRoot(tag, ctx);
+        if(root instanceof ChartHolder){
+            return (ChartHolder)root;
+        } else {
+            return getChartHolder(root.getChartId(), ctx);
+        }
+    }
+    
+    public static final Dataset getDataset(String chartId, PageContext ctx) throws DatasetProduceException {
+        return (Dataset) getChartHolder(chartId, ctx).getDataset();
+    }
+
+    public static final CewolfRootTag findRoot(Tag t, PageContext ctx){
+        Tag res = t;
+        while(!(res instanceof CewolfRootTag)){
+            res = res.getParent();
+        }
+        return (CewolfRootTag)res;
+    }
+    
+    public static final void setToolTipsEnabled(PageContext ctx){
+        if(!isToolTipsEnabled(ctx)){
+            ctx.setAttribute(TOOLTIPS_ENABLED_ATTR, "true", PageContext.PAGE_SCOPE);
+        }
+    }
+    
+    public static final boolean isToolTipsEnabled(PageContext ctx){
+        return ctx.getAttribute(TOOLTIPS_ENABLED_ATTR, PageContext.PAGE_SCOPE) != null;
+    }
+    
+}