Ui refinement

ApplicationComponents/SaveLidarFrame/lqSaveLidarFrameReaction.cxx

@@ -44,6 +44,8 @@ lqSaveLidarFrameReaction::lqSaveLidarFrameReaction(QAction* action,
   pqServerManagerModel* smmodel = core->getServerManagerModel();
   this->connect(smmodel, SIGNAL(sourceAdded(pqPipelineSource*)), SLOT(onUpdateUI(pqPipelineSource*)));
   this->connect(smmodel, SIGNAL(sourceRemoved(pqPipelineSource*)), SLOT(onUpdateUI(pqPipelineSource*)));
+  
+  this->onUpdateUI(nullptr);
 }
 
 //-----------------------------------------------------------------------------
@@ -100,7 +102,7 @@ void lqSaveLidarFrameReaction::onTriggered()
   auto* tsv = vtkSMDoubleVectorProperty::SafeDownCast(lidar->getProxy()->GetProperty("TimestepValues"));
   if (tsv)
   {
-    nbFrame = tsv->GetNumberOfElements();
+    nbFrame = tsv->GetNumberOfElements() ? tsv->GetNumberOfElements()-1 : 0 ;
   }
 
   lqSelectLidarFrameDialog dialog(nbFrame);