From 49cbd9d274410ef6110488da1ff16aca21fb18d0 Mon Sep 17 00:00:00 2001
From: Alexey Kudravtsev <cdr@intellij.com>
Date: Thu, 15 Sep 2011 14:09:06 +0400
Subject: [PATCH] readaction

---
 java/java-impl/src/com/intellij/slicer/SliceNode.java | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/java/java-impl/src/com/intellij/slicer/SliceNode.java b/java/java-impl/src/com/intellij/slicer/SliceNode.java
index a4af29af7049..5bd0561bd929 100644
--- a/java/java-impl/src/com/intellij/slicer/SliceNode.java
+++ b/java/java-impl/src/com/intellij/slicer/SliceNode.java
@@ -17,11 +17,13 @@ package com.intellij.slicer;
 
 import com.intellij.ide.projectView.PresentationData;
 import com.intellij.ide.util.treeView.AbstractTreeNode;
+import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.openapi.progress.ProgressIndicator;
 import com.intellij.openapi.progress.ProgressManager;
 import com.intellij.openapi.progress.impl.ProgressManagerImpl;
 import com.intellij.openapi.progress.util.ProgressIndicatorBase;
 import com.intellij.openapi.project.Project;
+import com.intellij.openapi.util.Computable;
 import com.intellij.ui.DuplicateNodeRenderer;
 import com.intellij.usageView.UsageViewBundle;
 import com.intellij.util.ArrayUtil;
@@ -181,7 +183,11 @@ public class SliceNode extends AbstractTreeNode<SliceUsage> implements Duplicate
   }
 
   public boolean isValid() {
-    return getValue().isValid();
+    return ApplicationManager.getApplication().runReadAction(new Computable<Boolean>() {
+      public Boolean compute() {
+        return getValue().isValid();
+      }
+    });
   }
 
   public boolean expandOnDoubleClick() {