[TD]control svg scaling at object level

src/Mod/TechDraw/Gui/ViewProviderSymbol.cpp

@@ -24,9 +24,15 @@
 #include "PreCompiled.h"
 
 #include <App/DocumentObject.h>
+
+#include <Mod/TechDraw/App/Preferences.h>
+
+#include "QGIViewSymbol.h"
 #include "ViewProviderSymbol.h"
 
 using namespace TechDrawGui;
+using namespace TechDraw;
+
 
 PROPERTY_SOURCE(TechDrawGui::ViewProviderSymbol, TechDrawGui::ViewProviderDrawingView)
 
@@ -36,6 +42,11 @@ PROPERTY_SOURCE(TechDrawGui::ViewProviderSymbol, TechDrawGui::ViewProviderDrawin
 ViewProviderSymbol::ViewProviderSymbol()
 {
     sPixmap = "TechDraw_TreeSymbol";
+
+    ADD_PROPERTY_TYPE(LegacyScaling, (Preferences::useLegacySvgScaling()), "Svg Scaling", App::Prop_None,
+      "If true, Svg will be scaled using the original (v1.0 and earlier) scaling method.\
+ If false, a more accurate method will be used.");
+
 }
 
 ViewProviderSymbol::~ViewProviderSymbol()
@@ -55,6 +66,18 @@ void ViewProviderSymbol::updateData(const App::Property* prop)
     ViewProviderDrawingView::updateData(prop);
 }
 
+void ViewProviderSymbol::onChanged(const App::Property* prop)
+{
+    if (prop == &(LegacyScaling)) {
+        QGIView* qgiv = getQView();
+        if (qgiv) {
+            qgiv->updateView(true);
+        }
+    }
+
+    ViewProviderDrawingView::onChanged(prop);
+}
+
 TechDraw::DrawViewSymbol* ViewProviderSymbol::getViewObject() const
 {
     return dynamic_cast<TechDraw::DrawViewSymbol*>(pcObject);