always verify movingItem is not null + don't call QGraphicsView::mouseMoveEvent if movingItem is null + don't display grey rectangle with the magic finger

src/board/UBBoardView.cpp

@@ -486,8 +486,14 @@ void UBBoardView::handleItemsSelection(QGraphicsItem *item)
     if (item)
     {
         //  item has group as first parent - it is any item or UBGraphicsStrokesGroup.
+        if (getMovingItem())
+        {
+            if (getMovingItem()->parentItem())
+            {
                 if(item->parentItem() && UBGraphicsGroupContainerItem::Type == getMovingItem()->parentItem()->type())
                     return;
+            }
+        }
 
         // delegate buttons shouldn't selected
         if (DelegateButton::Type == item->type())
@@ -653,11 +659,17 @@ bool UBBoardView::itemShouldBeMoved(QGraphicsItem *item)
     if (!(mMouseButtonIsPressed || mTabletStylusIsPressed))
         return false;
 
+    if (getMovingItem())
+    {
         if (getMovingItem()->data(UBGraphicsItemData::ItemLocked).toBool())
             return false;
 
-    if (getMovingItem()->parentItem() && UBGraphicsGroupContainerItem::Type == getMovingItem()->parentItem()->type() && !getMovingItem()->isSelected() && getMovingItem()->parentItem()->isSelected())
+        if (getMovingItem()->parentItem())
+        {
+            if (UBGraphicsGroupContainerItem::Type == getMovingItem()->parentItem()->type() && !getMovingItem()->isSelected() && getMovingItem()->parentItem()->isSelected())
                 return false;
+        }
+    }
 
     UBStylusTool::Enum currentTool = (UBStylusTool::Enum)UBDrawingController::drawingController()->stylusTool();
 
@@ -831,22 +843,24 @@ void UBBoardView::handleItemMouseMove(QMouseEvent *event)
         QPointF posAfterMove;
 
         if (getMovingItem())
+        {
             posBeforeMove = getMovingItem()->pos();
-
             QGraphicsView::mouseMoveEvent (event);
-
-        if (getMovingItem())
             posAfterMove = getMovingItem()->pos();
+        }
 
         mWidgetMoved = ((posAfterMove-posBeforeMove).manhattanLength() != 0);
 
         // a cludge for terminate moving of w3c widgets.
         // in some cases w3c widgets catches mouse move and doesn't sends that events to web page,
         // at simple - in google map widget - mouse move events doesn't comes to web page from rectangle of wearch bar on bottom right corner of widget.
-        if (getMovingItem() && mWidgetMoved && UBGraphicsW3CWidgetItem::Type == getMovingItem()->type())
+        if (getMovingItem())
+        {
+            if (mWidgetMoved && UBGraphicsW3CWidgetItem::Type == getMovingItem()->type())
                 getMovingItem()->setPos(posBeforeMove);
         }
     }
+}
 
 void UBBoardView::rubberItems()
 {
@@ -1270,7 +1284,10 @@ void UBBoardView::mouseReleaseEvent (QMouseEvent *event)
             setMovingItem(nullptr);
         }
         else
-            if (getMovingItem() && (!isCppTool(getMovingItem()) || UBGraphicsCurtainItem::Type == getMovingItem()->type()))
+        {
+            if (getMovingItem())
+            {
+                if (!isCppTool(getMovingItem()) || UBGraphicsCurtainItem::Type == getMovingItem()->type())
                 {
                     if (suspendedMousePressEvent)
                     {
@@ -1315,6 +1332,10 @@ void UBBoardView::mouseReleaseEvent (QMouseEvent *event)
                 }
                 else
                     bReleaseIsNeed = true;
+            }
+            else
+                bReleaseIsNeed = true;
+        }
 
         if (bReleaseIsNeed)
         {
@@ -1402,9 +1423,13 @@ void UBBoardView::mouseReleaseEvent (QMouseEvent *event)
             return;
         }
 
-        if (mWidgetMoved) {
+        if (mWidgetMoved)
+        {
+            if (getMovingItem())
+            {
                 getMovingItem()->setSelected(false);
                 setMovingItem(NULL);
+            }
             mWidgetMoved = false;
         }
         else {

src/domain/UBGraphicsItemDelegate.cpp

@@ -328,6 +328,8 @@ void UBGraphicsItemDelegate::postpaint(QPainter *painter, const QStyleOptionGrap
 {
     Q_UNUSED(widget)
     if (option->state & QStyle::State_Selected && !controlsExist()) {
+        if (UBStylusTool::Play != UBDrawingController::drawingController()->stylusTool())
+        {
             painter->save();
             painter->setPen(Qt::NoPen);
             painter->setBrush(QColor(0x88, 0x88, 0x88, 0x77));
@@ -336,6 +338,7 @@ void UBGraphicsItemDelegate::postpaint(QPainter *painter, const QStyleOptionGrap
             painter->restore();
         }
     }
+}
 
 bool UBGraphicsItemDelegate::mousePressEvent(QGraphicsSceneMouseEvent *event)
 {