Fix handling of Scale change in DrawViewSymbol classes

src/Mod/TechDraw/App/DrawViewArch.cpp

@@ -121,7 +121,8 @@ App::DocumentObjectExecReturn *DrawViewArch::execute(void)
                                          SourceName.c_str(),paramStr.str().c_str());
         Base::Interpreter().runStringArg("App.activeDocument().%s.Symbol = '%s' + svgBody + '%s'",
                                           FeatName.c_str(),svgHead.c_str(),svgTail.c_str());
-        }
+    }
+    requestPaint();
     return DrawView::execute();
 }
 

src/Mod/TechDraw/App/DrawViewDraft.cpp

@@ -124,6 +124,7 @@ App::DocumentObjectExecReturn *DrawViewDraft::execute(void)
         Base::Interpreter().runStringArg("App.activeDocument().%s.Symbol = '%s' + svgBody + '%s'",
                                           FeatName.c_str(),svgHead.c_str(),svgTail.c_str());
         }
+    requestPaint();
     return DrawView::execute();
 }
 

src/Mod/TechDraw/App/DrawViewSymbol.cpp

@@ -83,6 +83,7 @@ void DrawViewSymbol::onChanged(const App::Property* prop)
                     tbegin = twhat[0].second;
                 }
                 EditableTexts.setValues(eds);
+                requestPaint();
             }
         }
     }
@@ -119,6 +120,7 @@ App::DocumentObjectExecReturn *DrawViewSymbol::execute(void)
 
     }
     Symbol.setValue(newsvg);
+    requestPaint();
     return DrawView::execute();
 }
 
@@ -160,6 +162,20 @@ bool DrawViewSymbol::checkFit(TechDraw::DrawPage* p) const
     return result;
 }
 
+short DrawViewSymbol::mustExecute() const
+{
+    short result = 0;
+    if (!isRestoring()) {
+        result  =  (Scale.isTouched()  ||
+                    EditableTexts.isTouched());
+    }
+    if ((bool) result) {
+        return result;
+    }
+    return DrawView::mustExecute();
+}
+
+
 PyObject *DrawViewSymbol::getPyObject(void)
 {
     if (PythonObject.is(Py::_None())) {

src/Mod/TechDraw/App/DrawViewSymbol.h

@@ -63,6 +63,8 @@ public:
     //return PyObject as DrawViewSymbolPy
     virtual PyObject *getPyObject(void);
 
+    virtual short mustExecute() const;
+
 
 protected:
     virtual void onChanged(const App::Property* prop) override;