Beginnings of support for asynchronous resolution of scene image data.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@2461 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/miso/client/SceneBlockResolver.java

@@ -0,0 +1,52 @@
+//
+// $Id: SceneBlockResolver.java,v 1.1 2003/04/25 18:22:26 mdb Exp $
+
+package com.threerings.miso.client;
+
+import java.awt.EventQueue;
+
+import com.samskivert.util.LoopingThread;
+import com.samskivert.util.Queue;
+
+import com.threerings.miso.Log;
+
+/**
+ * A separate thread for resolving miso scene blocks.
+ */
+public class SceneBlockResolver extends LoopingThread
+{
+    /**
+     * Queues up a scene block for resolution.
+     */
+    public void resolveBlock (SceneBlock block)
+    {
+        _queue.append(block);
+    }
+
+    // documentation inherited
+    public void iterate ()
+    {
+        final SceneBlock block = (SceneBlock)_queue.get();
+
+        try {
+            // resolve the block
+            Log.info("Resolving block " + block + ".");
+            block.resolve();
+
+            // queue it up on the AWT thread to complete its resolution
+            EventQueue.invokeLater(new Runnable() {
+                public void run () {
+                    // let the block's panel know that it is resolved
+                    block.wasResolved();
+                }
+            });
+
+        } catch (Exception e) {
+            Log.warning("Block failed during resolution " + block + ".");
+            Log.logStackTrace(e);
+        }
+    }
+
+    /** The invoker's queue of units to be executed. */
+    protected Queue _queue = new Queue();
+}