SwitchViewDirection will remove volume measure.

src/src/Interaction/VolumeInteractorStyle.cpp

@@ -329,12 +329,12 @@ void VolumeInteractorStyle::MeasurePlace() {
 }
 
 void VolumeInteractorStyle::ClearMeasure() {
-
+    ActiveMeasure(nullptr);
+    EndMeasure();
     std::for_each(measureStore.begin(), measureStore.end(),[=](Measure* m){
         picker->DeletePickList(m->GetProp());
         m->ForceDelete();
     });
-
     measureStore.clear();
 }
 

src/src/Rendering/Viewer/VolumeRenderingViewer.cpp

@@ -300,7 +300,7 @@ void VolumeRenderingViewer::Render() {
             firstRender = false;
             RenderWindow->SetDesiredUpdateRate(Interactor->GetDesiredUpdateRate());
             Interactor->InvokeEvent(vtkCommand::StartInteractionEvent, nullptr);
-            SetViewDirection(0);
+            SwitchViewDirection(0);
             this->OrientationMarker->RemoveAllObservers();
             this->OrientationMarker->SetInteractor(this->Interactor);
             this->OrientationMarker->EnabledOn();
@@ -483,7 +483,7 @@ void VolumeRenderingViewer::SetCoordsTransformMatrix(ExtendMedicalImagePropertie
     OrientationMatrix->Invert();
 }
 
-void VolumeRenderingViewer::SetViewDirection(int direction) {
+void VolumeRenderingViewer::SwitchViewDirection(int direction) {
     double position[4] = {.0, .0, .0, 1.};
     double ViewUp[4] = {.0, .0, .0, 1.};
     switch (direction){
@@ -525,6 +525,10 @@ void VolumeRenderingViewer::SetViewDirection(int direction) {
     camera->SetPosition(position);
     camera->SetViewUp(ViewUp);
     Renderer->ResetCamera();
+    auto style  = VolumeInteractorStyle::SafeDownCast(InteractorStyle);
+    if (style){
+        style->ClearMeasure();
+    }
 }
 
 void VolumeRenderingViewer::ResetZoomFitWindow() {
@@ -572,7 +576,10 @@ void VolumeRenderingViewer::ResetZoomFitWindow() {
         //use 0.99 to avoid border out of screen
         camera->Dolly(0.99/halfDisY);
     }
-
+    auto style  = VolumeInteractorStyle::SafeDownCast(InteractorStyle);
+    if (style){
+        style->ClearMeasure();
+    }
     Renderer->ResetCameraClippingRange();
 }
 
@@ -601,7 +608,7 @@ void VolumeRenderingViewer::pressedOrientationMarker(vtkObject* sender, unsigned
         auto cube = vtkAnnotatedCubeActor::SafeDownCast(OrientationMarker->GetOrientationMarker());
         if (cube){
             int v = GetViewDirection(cube,var->ToInt());
-            SetViewDirection(v);
+            SwitchViewDirection(v);
             Render();
         }
     }

src/src/Rendering/Viewer/VolumeRenderingViewer.h

@@ -78,10 +78,10 @@ public:
 
     void SetInteractorStyleMode(int mode);
 
-    void SetViewDirection(int direction);
+    void SwitchViewDirection(int direction);
 
     void ResetViewDirection(){
-        SetViewDirection(0);
+        SwitchViewDirection(0);
     }
 
     void ResetView(){

src/src/UI/Window/VolumeRenderingWindow.cpp

@@ -54,7 +54,7 @@ VolumeRenderingWindow::VolumeRenderingWindow(QWidget *parent , Qt::WindowFlags f
     });
 
     connect(toolBar, &VolumeRenderingToolBar::viewDirectionChanged, [=](int direction){
-        mViewer->SetViewDirection(direction);
+        mViewer->SwitchViewDirection(direction);
         mViewer->Render();
     });
 }