backport implementation part of 754ade38

Change-Id: I7c732d94346be8f37fba1a32655ba224c74e0235
Reviewed-on: https://gerrit.libreoffice.org/20017Reviewed-by: Noel Grandin <noelgrandin@gmail.com>
Tested-by: Noel Grandin <noelgrandin@gmail.com>
Reviewed-by: Michael Stahl <mstahl@redhat.com>
Tested-by: Michael Stahl <mstahl@redhat.com>
(cherry picked from commit aaf3bc89)

qadevOOo/runner/util/utils.java

@@ -30,6 +30,7 @@ import java.net.ServerSocket;
 import java.net.URI;
 import java.net.URISyntaxException;
 
+import com.sun.star.awt.XToolkitExperimental;
 import com.sun.star.beans.XPropertySet;
 import com.sun.star.beans.Property;
 import com.sun.star.lang.XMultiServiceFactory;
@@ -661,6 +662,17 @@ public class utils {
         }
     }
 
+    public static void waitForEventIdle(XMultiServiceFactory xMSF) {
+        try {
+            XToolkitExperimental xToolkit = UnoRuntime.queryInterface(
+                    XToolkitExperimental.class,
+                    xMSF.createInstance("com.sun.star.awt.Toolkit"));
+            xToolkit.processEventsToIdle();
+        } catch (com.sun.star.uno.Exception ex) {
+            throw new RuntimeException(ex);
+        }
+    }
+
     /**
      * Validate the AppExecutionCommand. Returned is an error message, starting
      * with "Error:", or a warning, if the command might work.