App/Gui: add new ObjectStatus TouchOnColorChange

For triggering recompute on color changes

src/App/DocumentObject.h

@@ -65,6 +65,7 @@ enum ObjectStatus {
     NoAutoExpand = 17, // disable tree item auto expand on selection for this object
     PendingTransactionUpdate = 18, // mark that the object expects a call to onUndoRedoFinished() after transaction is finished.
     RecomputeExtension = 19, // mark the object to recompute its extensions
+    TouchOnColorChange = 20, // inform view provider touch object on color change
 };
 
 /** Return object for feature execution

src/Gui/ViewProviderGeometryObject.cpp

@@ -157,6 +157,8 @@ void ViewProviderGeometryObject::onChanged(const App::Property* prop)
         }
     }
     else if (prop == &ShapeMaterial) {
+        if (getObject() && getObject()->testStatus(App::ObjectStatus::TouchOnColorChange))
+            getObject()->touch(true);
         const App::Material& Mat = ShapeMaterial.getValue();
         long value = (long)(100*Mat.transparency);
         if (value != Transparency.getValue())

src/Mod/Part/Gui/ViewProviderExt.cpp

@@ -624,6 +624,9 @@ std::vector<Base::Vector3d> ViewProviderPartExt::getSelectionShape(const char* /
 
 void ViewProviderPartExt::setHighlightedFaces(const std::vector<App::Color>& colors)
 {
+    if (getObject() && getObject()->testStatus(App::ObjectStatus::TouchOnColorChange))
+        getObject()->touch(true);
+
     Gui::SoUpdateVBOAction action;
     action.apply(this->faceset);
 
@@ -779,6 +782,8 @@ void ViewProviderPartExt::unsetHighlightedFaces()
 
 void ViewProviderPartExt::setHighlightedEdges(const std::vector<App::Color>& colors)
 {
+    if (getObject() && getObject()->testStatus(App::ObjectStatus::TouchOnColorChange))
+        getObject()->touch(true);
     int size = static_cast<int>(colors.size());
     if (size > 1) {
         // Although indexed lineset is used the material binding must be PER_FACE!
@@ -814,6 +819,8 @@ void ViewProviderPartExt::unsetHighlightedEdges()
 
 void ViewProviderPartExt::setHighlightedPoints(const std::vector<App::Color>& colors)
 {
+    if (getObject() && getObject()->testStatus(App::ObjectStatus::TouchOnColorChange))
+        getObject()->touch(true);
     int size = static_cast<int>(colors.size());
     if (size > 1) {
 #if 0