Measurement: label drag when infront of model (#27832)

Co-authored-by: Nishendra Singh <[email protected]>
(cherry picked from commit 2d6e49cb7f)

src/Mod/Measure/Gui/ViewProviderMeasureBase.cpp

@@ -143,8 +143,12 @@ ViewProviderMeasureBase::ViewProviderMeasureBase()
     transformEngine->matrix.connectFrom(&matrixEngine->matrix);
     pLabelTranslation->translation.connectFrom(&transformEngine->point);
 
+    auto pTextPickStyle = new SoPickStyle();
+    pTextPickStyle->style = SoPickStyle::SHAPE_ON_TOP;
+
     pTextSeparator = new SoSeparator();
     pTextSeparator->ref();
+    pTextSeparator->addChild(pTextPickStyle);
     pTextSeparator->addChild(dragSeparator);
     pTextSeparator->addChild(pLabelTranslation);
     pTextSeparator->addChild(pLabel);
@@ -341,11 +345,28 @@ void ViewProviderMeasureBase::updateIcon()
     pLabel->setIcon(Gui::BitmapFactory().pixmapFromSvg(sPixmap, QSize(20, 20), colorMap));
 }
 
+void ViewProviderMeasureBase::syncDraggerOrientationToView()
+{
+    Gui::View3DInventor* view = nullptr;
+    try {
+        view = dynamic_cast<Gui::View3DInventor*>(this->getActiveView());
+    }
+    catch (const Base::RuntimeError&) {
+        return;
+    }
+    if (view) {
+        auto* cam = view->getViewer()->getSoRenderManager()->getCamera();
+        if (cam) {
+            pDraggerOrientation->rotation.connectFrom(&cam->orientation);
+        }
+    }
+}
 
 void ViewProviderMeasureBase::attach(App::DocumentObject* pcObj)
 {
     ViewProviderDocumentObject::attach(pcObj);
     updateIcon();
+    syncDraggerOrientationToView();
 }
 
 
@@ -621,21 +642,7 @@ ViewProviderMeasure::ViewProviderMeasure()
     points->numPoints = 1;
     lineSep->addChild(points);
 
-    // Connect dragger local orientation to view orientation
-    Gui::View3DInventor* view = nullptr;
-    try {
-        view = dynamic_cast<Gui::View3DInventor*>(this->getActiveView());
-    }
-    catch (const Base::RuntimeError&) {
-        Base::Console().log("ViewProviderMeasure::ViewProviderMeasure: Could not get active view\n");
-    }
-
-    if (view) {
-        Gui::View3DInventorViewer* viewer = view->getViewer();
-        auto renderManager = viewer->getSoRenderManager();
-        auto cam = renderManager->getCamera();
-        pDraggerOrientation->rotation.connectFrom(&cam->orientation);
-    }
+    syncDraggerOrientationToView();
 }
 
 ViewProviderMeasure::~ViewProviderMeasure()

src/Mod/Measure/Gui/ViewProviderMeasureBase.h

@@ -140,6 +140,7 @@ protected:
     void setLabelValue(const QString& value);
     void setLabelTranslation(const SbVec3f& position);
     void updateIcon();
+    void syncDraggerOrientationToView();
 
     SoPickStyle* getSoPickStyle();
     SoDrawStyle* getSoLineStylePrimary();