From 0432ecdb885476f95a00262d7bf3452a00e47c94 Mon Sep 17 00:00:00 2001
From: wandererfan <wandererfan@gmail.com>
Date: Tue, 14 Aug 2018 22:12:36 -0400
Subject: [PATCH] Fix propagation of Source property to children

---
 src/Mod/TechDraw/App/DrawProjGroup.cpp | 21 +++++++++++++++++++++
 src/Mod/TechDraw/App/DrawProjGroup.h   |  1 +
 2 files changed, 22 insertions(+)

diff --git a/src/Mod/TechDraw/App/DrawProjGroup.cpp b/src/Mod/TechDraw/App/DrawProjGroup.cpp
index dee3798ccc..bcdf2b4a6d 100644
--- a/src/Mod/TechDraw/App/DrawProjGroup.cpp
+++ b/src/Mod/TechDraw/App/DrawProjGroup.cpp
@@ -116,6 +116,9 @@ void DrawProjGroup::onChanged(const App::Property* prop)
         if (prop == &Scale) {
             updateChildren();
         }
+        if (prop == &Source) {
+            updateChildrenSource();
+        }
         
         if (prop == &ScaleType) {
             double newScale = getScale();
@@ -723,6 +726,24 @@ void DrawProjGroup::updateChildren(void)
     }
 }
 
+//void DrawProjGroup::updateChildren(const App::Property* prop)
+//{
+//    view->....setValue(s)(prop->getValue(s));
+//}
+
+/*! 
+ * tell children DPGIs that parent DPG has changed Source
+ */
+void DrawProjGroup::updateChildrenSource(void)
+{
+    for( const auto it : Views.getValues() ) {
+        auto view( dynamic_cast<DrawProjGroupItem *>(it) );
+        if( view ) {
+            view->Source.setValues(Source.getValues());
+        }
+    }
+}
+
 /*!
  * check if ProjectionGroup fits on Page
  */
diff --git a/src/Mod/TechDraw/App/DrawProjGroup.h b/src/Mod/TechDraw/App/DrawProjGroup.h
index 30f0b860de..b25b85982a 100644
--- a/src/Mod/TechDraw/App/DrawProjGroup.h
+++ b/src/Mod/TechDraw/App/DrawProjGroup.h
@@ -165,6 +165,7 @@ protected:
     /// Returns pointer to our page, or NULL if it couldn't be located
     TechDraw::DrawPage * getPage(void) const;
     void updateChildren(void);
+    void updateChildrenSource(void);
     void setPropsFromCube(void);
     void setCubeFromProps(void);
     int getViewIndex(const char *viewTypeCStr) const;