Fix page alignment when change to different Template

src/Mod/TechDraw/App/DrawPage.cpp

@@ -133,7 +133,7 @@ void DrawPage::onChanged(const App::Property* prop)
     } else if (prop == &Template) {
         if (!isRestoring() &&
             !isDeleting()) {
-            Template.getValue()->touch();
+            //nothing to page to do??
         }
     } else if(prop == &Scale) {
         // touch all views in the Page as they may be dependent on this scale
@@ -248,8 +248,6 @@ int DrawPage::addView(App::DocumentObject *docObj)
     if(!docObj->isDerivedFrom(TechDraw::DrawView::getClassTypeId()))
         return -1;
     DrawView* view = static_cast<DrawView*>(docObj);
-//TODO: replace list of views with PropertyLink to Page in subordinate DrawView
-//    view->Page.setValue(this);
 
     //position all new views in center of Page (exceptDVDimension)
     if (!docObj->isDerivedFrom(TechDraw::DrawViewDimension::getClassTypeId())) {

src/Mod/TechDraw/Gui/ViewProviderTemplate.cpp

@@ -43,6 +43,7 @@
 #include <Gui/Selection.h>
 
 #include <Mod/TechDraw/App/DrawTemplate.h>
+#include <Mod/TechDraw/App/DrawSVGTemplate.h>
 #include "QGITemplate.h"
 #include "QGVPage.h"
 #include "MDIViewPage.h"
@@ -86,6 +87,19 @@ std::vector<std::string> ViewProviderTemplate::getDisplayModes(void) const
 
 void ViewProviderTemplate::updateData(const App::Property* prop)
 {
+    if (getTemplate()->isDerivedFrom(TechDraw::DrawSVGTemplate::getClassTypeId())) {
+        auto t = static_cast<TechDraw::DrawSVGTemplate*>(getTemplate());
+        if (prop == &(t->Template)) {
+            Gui::MDIView* gmdi = getActiveView();
+            if (gmdi != nullptr) {
+                MDIViewPage*  mdi = dynamic_cast<MDIViewPage*>(gmdi);
+                if (mdi != nullptr) {
+                    mdi->attachTemplate(t);
+                    mdi->viewAll();
+                }
+            }
+       }
+    }
     Gui::ViewProviderDocumentObject::updateData(prop);
 }