Make UI thread not blocked on node problems and improve node problem …

…error reporting.

fixes #1

src/ChannelGlobals.java

@@ -2,7 +2,7 @@
 
 public class ChannelGlobals
 {
-  public static final String VERSION = "dev.10.25.0";
+  public static final String VERSION = "dev.11.07.0";
 
   public static final String NODE_ADDRESS_STRING="node";
   public static final String CHANNEL_ADDRESS_STRING="chan";

src/iceleaf/ChannelComboBox.java

@@ -11,12 +11,12 @@
 public class ChannelComboBox extends JComboBox<String>
 {
 
-  private ChannelNode node;
+  private ChannelNodePanel node_panel;
   protected TreeSet<String> current_select_box_items=new TreeSet<>();
 
-  public ChannelComboBox(ChannelNode node)
+  public ChannelComboBox(ChannelNodePanel node_panel)
   {
-    this.node = node;
+    this.node_panel = node_panel;
 
 		UpdateThread ut = new UpdateThread();
 		ut.start();
@@ -34,6 +34,9 @@ public void runPass() throws Exception
       try
       { 
         TreeSet<String> names = new TreeSet<>();
+        ChannelNode node = node_panel.getNode();
+        if (node == null) return;
+
         for(ChannelID cid : node.getChannelSubscriber().getChannelSet())
         {
           names.add(cid.toString());

src/iceleaf/ChannelNodePanel.java

@@ -85,25 +85,20 @@ public void setupPanel()
 
     c.gridwidth = 1;
     panel.add(new JLabel("Import files to channel: "), c);
-    while(node == null)
-    {
-      try
-      {
-      Thread.sleep(10); // evil person, sleeping in ui thread
-      }
-      catch(Throwable t){}
-    }
-    channel_import_box = new ChannelComboBox(node);
+    channel_import_box = new ChannelComboBox(this);
     panel.add(channel_import_box, c);
 
     c.gridwidth = GridBagConstraints.REMAINDER;
     import_button = new JButton("Import");
     import_button.addActionListener( new ImportAction());
     panel.add(import_button, c);
 
+  }
 
-
-
+  // May very well be null on startup
+  public ChannelNode getNode()
+  {
+    return node;
   }
 
   public class NodeUpdateThread extends PeriodicThread
@@ -129,6 +124,8 @@ public void runPass() throws Exception
           startNode();
         }
 
+        if (node == null) return;
+
         StringBuilder sb=new StringBuilder();
 
         sb.append("Local node ID: " + AddressUtil.getAddressString( ChannelGlobals.NODE_ADDRESS_STRING,  node.getNodeID()));
@@ -164,7 +161,7 @@ public void runPass() throws Exception
       }
       catch(Exception e)
       {
-        String text = e.toString();
+        String text = MiscUtils.printStackTrace(e);
         setMessageBox(text);
         e.printStackTrace();
 
@@ -192,6 +189,7 @@ public void run()
   private void startNode()
     throws Exception
   {
+    //There are too many side effects to try this more than once
     start_attempt=true;
     TreeMap<String, String> config_map = new TreeMap();
 
@@ -212,7 +210,6 @@ private void startNode()
     setStatusBox("Node started");
     setMessageBox("");
 
-
   }
 
   public class CreateAction implements ActionListener