Blocking Animator events from the scene graph thread to avoid running

into QCoreApplication assertions. This is a workaround only as starting
animators happens in QskInputPanel and shuld be avoided there.

src/controls/QskHintAnimator.cpp

@@ -9,11 +9,28 @@
 #include "QskEvent.h"
 
 #include <QObject>
+#include <QThread>
 
 #include <map>
 #include <vector>
 #include <algorithm>
 
+static inline bool qskCheckReceiverThread( const QObject *receiver )
+{
+    /*
+        QskInputPanelSkinlet changes the skin state, what leads to
+        sending events from the wrong thread. Until we have fixed it
+        let's block sending the event to avoid running into assertions
+        in QCoreApplication::sendEvent
+     */
+
+    const QThread *thread = receiver->thread();
+    if ( thread == nullptr )
+        return true;
+
+    return ( thread == QThread::currentThread() );
+}   
+
 static inline QVariant qskAdjustedValue(
     QskAspect::Aspect aspect, const QVariant& value )
 {
@@ -168,8 +185,11 @@ void QskHintAnimatorTable::start( QskControl* control,
 
     animator.start();
 
+    if ( qskCheckReceiverThread( control ) )
+    {
         QskAnimatorEvent event( aspect, QskAnimatorEvent::Started );
         QCoreApplication::sendEvent( control, &event );
+    }
 }
 
 const QskHintAnimator* QskHintAnimatorTable::animator( QskAspect::Aspect aspect ) const
@@ -216,11 +236,14 @@ bool QskHintAnimatorTable::cleanup()
             it = m_data->map.erase( it );
 
             if ( control )
+            {
+                if ( qskCheckReceiverThread( control ) )
                 {
                     QskAnimatorEvent event( aspect, QskAnimatorEvent::Terminated );
                     QCoreApplication::sendEvent( control, &event );
                 }
             }
+        }
         else
         {
             ++it;