Index: openide/src/org/openide/explorer/ExplorerUtils.java
===================================================================
RCS file: /cvs/openide/src/org/openide/explorer/ExplorerUtils.java,v
--- openide/src/org/openide/explorer/ExplorerUtils.java	20 Jan 2004 10:10:16 -0000	1.4
+++ openide/src/org/openide/explorer/ExplorerUtils.java	10 Jun 2004 12:12:17 -0000
@@ -186,4 +186,29 @@ 
         return new DefaultEMLookup (em, map);
     }
     
+    /** Utility method to get context help from a node selection.
+     *  Tries to find context helps for selected nodes.
+     *  If there are some, and they all agree, uses that.
+     *  In all other cases, uses the supplied generic help.
+     *
+     *  @param sel a list of nodes to search for help in
+     *  @param def the default help to use if they have none or do not agree
+     *  @return a help context
+     */
+    public static HelpCtx getHelpCtx (Node[] sel, HelpCtx def) {
+        HelpCtx result = null;
+        for (int i = 0; i < sel.length; i++) {
+            HelpCtx attempt = sel[i].getHelpCtx ();
+            if (attempt != null && ! attempt.equals (HelpCtx.DEFAULT_HELP)) {
+                if (result == null || result.equals (attempt)) {
+                    result = attempt;
+                } else {
+                    // More than one found, and they conflict. Get general help on the Explorer instead.
+                    result = null;
+                    break;
+                }
+            }
+        }
+        return result != null ? result : def;
+    }
 }
Index: projects/projectui/src/org/netbeans/modules/project/ui/ProjectTab.java
===================================================================
RCS file: /cvs/projects/projectui/src/org/netbeans/modules/project/ui/ProjectTab.java,v
--- projects/projectui/src/org/netbeans/modules/project/ui/ProjectTab.java	1 Jun 2004 12:15:20 -0000	1.7
+++ projects/projectui/src/org/netbeans/modules/project/ui/ProjectTab.java	10 Jun 2004 12:12:17 -0000
@@ -83,7 +83,7 @@ 
     
     public ProjectTab() {
 
-        // This should not be here byt for some reason it does not work
+        // This should not be here but for some reason it does not work
         // In the module installer
         Hacks.hackFolderActions();
         
@@ -194,7 +194,9 @@ 
     }
     
     public HelpCtx getHelpCtx() {
-        return new HelpCtx(ProjectTab.class);
+        return ExplorerUtils.getHelpCtx(
+                manager.getSelectedNodes(),
+                new HelpCtx( ProjectTab.class ) );
     }
      
     public int getPersistenceType() {
Index: openide/test/unit/src/org/openide/explorer/ExplorerUtilsTest.java
===================================================================
RCS file: openide/test/unit/src/org/openide/explorer/ExplorerUtilsTest.java
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ openide/test/unit/src/org/openide/explorer/ExplorerUtilsTest.java	10 Jun 2004 12:12:17 -0000
@@ -0,0 +1,87 @@ 
+/*
+ *                 Sun Public License Notice
+ * 
+ * The contents of this file are subject to the Sun Public License
+ * Version 1.0 (the "License"). You may not use this file except in
+ * compliance with the License. A copy of the License is available at
+ * http://www.sun.com/
+ * 
+ * The Original Code is NetBeans. The Initial Developer of the Original
+ * Code is Sun Microsystems, Inc. Portions Copyright 1997-2003 Sun
+ * Microsystems, Inc. All Rights Reserved.
+ */
+
+package org.openide.explorer;
+
+import junit.textui.TestRunner;
+
+import org.netbeans.junit.*;
+import org.openide.nodes.*;
+import org.openide.util.HelpCtx;
+
+/**
+ * Check the behaviour of the ExplorerUtils
+ *
+ * @author Petr Nejedly
+ */
+public class ExplorerUtilsTest extends NbTestCase {
+    public ExplorerUtilsTest(String testName) {
+        super(testName);
+    }
+    
+    public static void main(String[] args) {
+        TestRunner.run(new NbTestSuite(ExplorerUtilsTest.class));
+        System.exit(0);
+    }
+    
+    public void testGetHelpCtx () throws Exception {
+        HelpCtx DEF = new HelpCtx("default");
+        
+        assertEquals("Use default help for no nodes",
+            DEF,
+            ExplorerUtils.getHelpCtx(new Node[0], DEF));
+        
+        assertEquals("Use default help for single node w/o help",
+            DEF,
+            ExplorerUtils.getHelpCtx(new Node[] {new NoHelpNode()}, DEF));
+            
+        assertEquals("Use provided help for single node with help",
+            new HelpCtx("foo"),
+            ExplorerUtils.getHelpCtx(new Node[] {new WithHelpNode("foo")}, DEF));
+
+        assertEquals("Use default help for more nodes w/o help",
+            DEF,
+            ExplorerUtils.getHelpCtx(new Node[] {new NoHelpNode(), new NoHelpNode()}, DEF));
+            
+        assertEquals("Use provided help if only one node has help",
+            new HelpCtx("foo"),
+            ExplorerUtils.getHelpCtx(new Node[] {new NoHelpNode(), new WithHelpNode("foo")}, DEF));
+            
+        assertEquals("Use provided help if more nodes have the same help",
+            new HelpCtx("foo"),
+            ExplorerUtils.getHelpCtx(new Node[] {new WithHelpNode("foo"), new WithHelpNode("foo")}, DEF));
+            
+        assertEquals("Use default help if nodes have different helps",
+            DEF,
+            ExplorerUtils.getHelpCtx(new Node[] {new WithHelpNode("foo"), new WithHelpNode("bar")}, DEF));
+    }
+
+    
+    private static final class NoHelpNode extends AbstractNode {
+        public NoHelpNode() {
+            super(Children.LEAF);
+        }
+    }
+    
+    private static final class WithHelpNode extends AbstractNode {
+        private final String id;
+        public WithHelpNode(String id) {
+            super(Children.LEAF);
+            this.id = id;
+        }
+        public HelpCtx getHelpCtx() {
+            return new HelpCtx(id);
+        }
+    }
+    
+}