diff -r bca9afcc3a72 -r 23912c93935a qmlFrontend/hwengine.h
--- a/qmlFrontend/hwengine.h	Sat Nov 28 00:18:04 2015 +0300
+++ b/qmlFrontend/hwengine.h	Mon Nov 30 23:25:18 2015 +0300
@@ -47,6 +47,7 @@
     void errorMessage(const QString & message);
     void warningMessage(const QString & message);
 
+    void previewIsRendering();
     void previewImageChanged();
     void localTeamAdded(const QString & teamName, int aiLevel);
     void localTeamRemoved(const QString & teamName);