ruler and triangle were no longer receiving mouse move events

src/board/UBBoardView.cpp

@@ -1243,6 +1243,35 @@ void UBBoardView::mouseMoveEvent (QMouseEvent *event)
         if (!mTabletStylusIsPressed && scene()) {
             scene()->inputDeviceMove(mapToScene(UBGeometryUtils::pointConstrainedInRect(event->pos(), rect())) , mMouseButtonIsPressed);
         }
+        if (UBDrawingController::drawingController()->isDrawingTool())
+        {
+            QGraphicsItem* item = scene()->itemAt(mapToScene(event->pos()), QTransform());
+            if (item)
+            {
+                //if showMarkerPreviewCircle, showPenPreviewCircle or showEraserPreviewCircle is true, then the topmost visible item under the mouse is the preview circle
+                QGraphicsEllipseItem* circle = dynamic_cast<QGraphicsEllipseItem*>(scene()->itemAt(mapToScene(event->pos()), QTransform()));
+                if (circle)
+                {
+                    circle->setVisible(false);
+                    item = scene()->itemAt(mapToScene(event->pos()), QTransform());
+                    if (item)
+                    {
+                        if (item->type() == UBGraphicsRuler::Type || item->type() == UBGraphicsTriangle::Type)
+                        {
+                            QGraphicsView::mouseMoveEvent(event);
+                        }
+                    }
+                    circle->setVisible(true);
+                }
+                else
+                {
+                    if (item->type() == UBGraphicsRuler::Type || item->type() == UBGraphicsTriangle::Type)
+                    {
+                        QGraphicsView::mouseMoveEvent(event);
+                    }
+                }
+            }
+        }
         event->accept ();
     }
 

src/tools/UBGraphicsAxes.cpp

@@ -428,7 +428,6 @@ void UBGraphicsAxes::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
     setCursor(Qt::ArrowCursor);
     mCloseSvgItem->setVisible(mShowButtons);
     mNumbersSvgItem->setVisible(mShowButtons);
-    UBDrawingController::drawingController()->mActiveRuler = NULL;
     event->accept();
     update();
 }

src/tools/UBGraphicsRuler.cpp

@@ -420,6 +420,9 @@ void UBGraphicsRuler::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
 {
     UBStylusTool::Enum currentTool = (UBStylusTool::Enum)UBDrawingController::drawingController ()->stylusTool ();
 
+    if (UBDrawingController::drawingController()->mActiveRuler == nullptr)
+        UBDrawingController::drawingController()->mActiveRuler = this;
+
     if (currentTool == UBStylusTool::Selector ||
         currentTool == UBStylusTool::Play)
     {
@@ -450,7 +453,6 @@ void UBGraphicsRuler::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
     else if (UBDrawingController::drawingController()->isDrawingTool())
     {
         setCursor(drawRulerLineCursor());
-        UBDrawingController::drawingController()->mActiveRuler = this;
         event->accept();
     }
 }
@@ -462,7 +464,7 @@ void UBGraphicsRuler::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
     mCloseSvgItem->setVisible(mShowButtons);
     mResizeSvgItem->setVisible(mShowButtons);
     mRotateSvgItem->setVisible(mShowButtons);
-    UBDrawingController::drawingController()->mActiveRuler = NULL;
+    UBDrawingController::drawingController()->mActiveRuler = nullptr;
     event->accept();
     update();
 }