[TechDraw] Add Owner property to Symbols

src/Mod/TechDraw/App/DrawView.cpp

@@ -375,6 +375,11 @@ bool DrawView::isInClip()
     return false;
 }
 
+DrawView *DrawView::claimParent() const
+{
+    return nullptr;
+}
+
 DrawViewClip* DrawView::getClipGroup()
 {
     std::vector<App::DocumentObject*> parent = getInList();

src/Mod/TechDraw/App/DrawView.h

@@ -84,6 +84,8 @@ public:
 
     virtual DrawPage* findParentPage() const;
     virtual std::vector<DrawPage*> findAllParentPages() const;
+    virtual DrawView *claimParent() const;
+
     virtual int countParentPages() const;
     virtual QRectF getRect() const;                      //must be overridden by derived class
     QRectF getRectAligned() const;

src/Mod/TechDraw/App/DrawViewSymbol.cpp

@@ -51,6 +51,9 @@ DrawViewSymbol::DrawViewSymbol()
     ADD_PROPERTY_TYPE(Symbol, (""), vgroup, App::Prop_None, "The SVG code defining this symbol");
     ADD_PROPERTY_TYPE(EditableTexts, (""), vgroup, App::Prop_None,
                       "Substitution values for the editable strings in this symbol");
+    ADD_PROPERTY_TYPE(Owner, (nullptr), vgroup, (App::PropertyType)(App::Prop_None),
+                      "Feature to which this symbol is attached");
+
     ScaleType.setValue("Custom");
     Scale.setStatus(App::Property::ReadOnly, false);
     Symbol.setStatus(App::Property::Hidden, true);
@@ -58,6 +61,28 @@ DrawViewSymbol::DrawViewSymbol()
 
 DrawViewSymbol::~DrawViewSymbol() {}
 
+void DrawViewSymbol::touchTreeOwner()
+{
+    auto owner = dynamic_cast<DrawView *>(Owner.getValue());
+    if (owner) {
+        owner->touch();
+    }
+    else { // If no owner is specified, touch all parent pages
+        for (auto page : findAllParentPages()) {
+            page->touch();
+        }
+    }
+}
+
+void DrawViewSymbol::onBeforeChange(const App::Property *prop)
+{
+    if (prop == &Owner && !isRestoring()) {
+        touchTreeOwner();
+    }
+
+    TechDraw::DrawView::onBeforeChange(prop);
+}
+
 void DrawViewSymbol::onChanged(const App::Property* prop)
 {
     if (prop == &Symbol) {
@@ -72,10 +97,26 @@ void DrawViewSymbol::onChanged(const App::Property* prop)
         //1 cycle
         updateFieldsInSymbol();
     }
+    else if (prop == &Owner) {
+        if (!isRestoring()) {
+            touchTreeOwner();
+        }
+    }
 
     TechDraw::DrawView::onChanged(prop);
 }
 
+short DrawViewSymbol::mustExecute() const
+{
+    if (!isRestoring()) {
+        if (Owner.isTouched()) {
+            return 1;
+        }
+    }
+
+    return DrawView::mustExecute();
+}
+
 App::DocumentObjectExecReturn* DrawViewSymbol::execute()
 {
     //nothing to do. DVS is just a container for properties.
@@ -83,6 +124,11 @@ App::DocumentObjectExecReturn* DrawViewSymbol::execute()
     return DrawView::execute();
 }
 
+DrawView *DrawViewSymbol::claimParent() const
+{
+    return dynamic_cast<DrawView *>(Owner.getValue());
+}
+
 QRectF DrawViewSymbol::getRect() const
 {
     double w = 64.0;//must default to something

src/Mod/TechDraw/App/DrawViewSymbol.h

@@ -48,7 +48,9 @@ public:
 
     App::PropertyString       Symbol;
     App::PropertyStringList   EditableTexts;
+    App::PropertyLink         Owner;
 
+    short mustExecute() const override;
     /** @name methods override Feature */
     //@{
     /// recalculate the Feature
@@ -59,6 +61,7 @@ public:
     const char* getViewProviderName() const override {
         return "TechDrawGui::ViewProviderSymbol";
     }
+    DrawView *claimParent(void) const override;
     QRectF getRect() const override;
     bool checkFit(TechDraw::DrawPage* p) const override;
 
@@ -66,6 +69,8 @@ public:
     PyObject *getPyObject() override;
 
 protected:
+    void touchTreeOwner();
+    void onBeforeChange(const App::Property* prop) override;
     void onChanged(const App::Property* prop) override;
     Base::BoundBox3d bbox;
 

src/Mod/TechDraw/App/Geometry.cpp

@@ -36,6 +36,7 @@
 # include <BRepBuilderAPI_MakeVertex.hxx>
 # include <BRepBuilderAPI_MakeWire.hxx>
 # include <BRepExtrema_DistShapeShape.hxx>
+# include <BRepGProp.hxx>
 # include <BRepLib.hxx>
 # include <BRepLProp_CLProps.hxx>
 # include <BRepTools.hxx>
@@ -43,6 +44,7 @@
 # include <GC_MakeEllipse.hxx>
 # include <gce_MakeCirc.hxx>
 # include <GCPnts_AbscissaPoint.hxx>
+# include <GProp_GProps.hxx>
 # include <Geom_BSplineCurve.hxx>
 # include <Geom_BezierCurve.hxx>
 # include <Geom_Circle.hxx>
@@ -158,6 +160,14 @@ TopoDS_Face Face::toOccFace() const
     return TopoDS_Face();
 }
 
+//**** Face
+Base::Vector3d Face::getCenter() const {
+    GProp_GProps faceProps;
+    BRepGProp::SurfaceProperties(toOccFace(), faceProps);
+
+    return DrawUtil::toVector3d(faceProps.CentreOfMass());
+}
+
 Face::~Face()
 {
     for(auto it : wires) {

src/Mod/TechDraw/App/Geometry.h

@@ -347,6 +347,8 @@ class TechDrawExport Face
         ~Face();
         TopoDS_Face toOccFace() const;
         std::vector<Wire *> wires;
+
+        Base::Vector3d getCenter() const;
 };
 using FacePtr = std::shared_ptr<Face>;