Add tooltip support to config editor via _TIP convention

ObjectEditorPanel now looks up a static String constant named
FIELD_NAME_TIP (e.g. myField → MY_FIELD_TIP) on the ConfigObject after
calling getEditor(), and sets it as a tooltip on the editor panel.

No changes to ConfigObject's API — existing getEditor() overrides
continue to work and automatically receive tooltips.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

core/src/main/java/com/threerings/admin/client/ObjectEditorPanel.java

@@ -9,6 +9,7 @@ import java.lang.reflect.Field;
 import java.lang.reflect.Modifier;
 
 import javax.swing.BorderFactory;
+import javax.swing.JPanel;
 
 import com.samskivert.swing.ScrollablePanel;
 import com.samskivert.swing.VGroupLayout;
@@ -89,7 +90,7 @@ public class ObjectEditorPanel extends ScrollablePanel
                 // if the field is anything but a plain old public field,
                 // we don't want to edit it
                 if (field.getModifiers() == Modifier.PUBLIC) {
-                    add(_object.getEditor(_ctx, field));
+                    add(applyTip(object, field, _object.getEditor(_ctx, field)));
                 }
             }
 
@@ -106,6 +107,31 @@ public class ObjectEditorPanel extends ScrollablePanel
         log.warning("Unable to subscribe to config object: " + cause);
     }
 
+    /**
+     * Looks up a {@code FIELD_NAME_TIP} static String constant on the config object and applies
+     * it as a tooltip on the editor panel.
+     */
+    protected static JPanel applyTip (ConfigObject object, Field field, JPanel editor)
+    {
+        String tipName = toUpperSnake(field.getName()) + "_TIP";
+        try {
+            Field tipField = object.getClass().getField(tipName);
+            if (tipField.getType() == String.class &&
+                    Modifier.isStatic(tipField.getModifiers())) {
+                editor.setToolTipText((String) tipField.get(null));
+            }
+        } catch (NoSuchFieldException | IllegalAccessException e) {
+            // no tip constant for this field
+        }
+        return editor;
+    }
+
+    /** Converts a {@code lowerCamelCase} name to {@code UPPER_SNAKE_CASE}. */
+    private static String toUpperSnake (String name)
+    {
+        return name.replaceAll("([a-z0-9])([A-Z])", "$1_$2").toUpperCase();
+    }
+
     protected PresentsContext _ctx;
     protected String _key;
     protected SafeSubscriber<ConfigObject> _safesub;

core/src/main/java/com/threerings/presents/client/Client.java

@@ -870,11 +870,7 @@ public class Client
         }
         // otherwise queue this notification up to run on the run queue thread
         else {
-            _runQueue.postRunnable(new Runnable() {
-                public void run () {
-                    _observers.apply(op);
-                }
-            });
+            _runQueue.postRunnable(() -> _observers.apply(op));
         }
     }
 
@@ -894,8 +890,7 @@ public class Client
         // CLIENT_DID_LOGOFF; that may not have been invoked yet, so we don't want to clear out our
         // communicator reference immediately; instead we queue up a runnable unit to do so to
         // ensure that it won't happen until CLIENT_DID_LOGOFF was dispatched
-        _runQueue.postRunnable(new Runnable() {
-            public void run () {
+        _runQueue.postRunnable(() -> {
             // tell the object manager that we're no longer connected to the server
             if (_omgr instanceof ClientDObjectMgr) {
                 ((ClientDObjectMgr)_omgr).cleanup();
@@ -925,7 +920,6 @@ public class Client
                     }
                 }
             });
-            }
         });
     }
 

core/src/main/java/com/threerings/presents/client/ClientDObjectMgr.java

@@ -234,10 +234,8 @@ public class ClientDObjectMgr
         _flusher.cancel();
         _flushes.clear();
         _dead.clear();
-        _client.getRunQueue().postRunnable(new Runnable() {
-            public void run () {
+        _client.getRunQueue().postRunnable(() -> {
             _ocache.clear();
-            }
         });
     }