From 1960a4a8a430f7f68b27ef477791a69eefa83895 Mon Sep 17 00:00:00 2001
From: wandererfan <wandererfan@gmail.com>
Date: Fri, 14 Nov 2025 15:38:16 -0500
Subject: [PATCH] [TD]enforce center mark print rule on print preview

---
 src/Mod/TechDraw/Gui/MDIViewPage.cpp | 7 +++++--
 src/Mod/TechDraw/Gui/MDIViewPage.h   | 2 ++
 src/Mod/TechDraw/Gui/PagePrinter.cpp | 5 +++--
 src/Mod/TechDraw/Gui/PagePrinter.h   | 2 +-
 4 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/src/Mod/TechDraw/Gui/MDIViewPage.cpp b/src/Mod/TechDraw/Gui/MDIViewPage.cpp
index 7a16b0c32f..a69c74f9c4 100644
--- a/src/Mod/TechDraw/Gui/MDIViewPage.cpp
+++ b/src/Mod/TechDraw/Gui/MDIViewPage.cpp
@@ -81,7 +81,8 @@ namespace sp = std::placeholders;
 TYPESYSTEM_SOURCE_ABSTRACT(TechDrawGui::MDIViewPage, Gui::MDIView)
 
 MDIViewPage::MDIViewPage(ViewProviderPage* pageVp, Gui::Document* doc, QWidget* parent)
-    : Gui::MDIView(doc, parent), m_vpPage(pageVp)
+    : Gui::MDIView(doc, parent), m_vpPage(pageVp),
+      m_previewState(false)
 {
     setMouseTracking(true);
 
@@ -362,7 +363,9 @@ void MDIViewPage::printPreview()
 
     QPrintPreviewDialog dlg(&printer, this);
     connect(&dlg, &QPrintPreviewDialog::paintRequested, this, qOverload<QPrinter*>(&MDIViewPage::print));
+    m_previewState = true;
     dlg.exec();
+    m_previewState = false;
 }
 
 
@@ -411,7 +414,7 @@ void MDIViewPage::print(QPrinter* printer)
         }
     }
 
-    PagePrinter::print(getViewProviderPage(), printer);
+    PagePrinter::print(getViewProviderPage(), printer, m_previewState);
 }
 
 // static routine to print all pages in a document.  Used by PrintAll command in Command.cpp
diff --git a/src/Mod/TechDraw/Gui/MDIViewPage.h b/src/Mod/TechDraw/Gui/MDIViewPage.h
index 64698d1c6d..c3fa868d65 100644
--- a/src/Mod/TechDraw/Gui/MDIViewPage.h
+++ b/src/Mod/TechDraw/Gui/MDIViewPage.h
@@ -156,6 +156,8 @@ private:
     QList<QGraphicsItem*> m_orderedSceneSelection;        //items in selection order
 
     QString defaultFileName();
+
+    bool m_previewState{false};
 };
 
 class MDIViewPagePy : public Py::PythonExtension<MDIViewPagePy>
diff --git a/src/Mod/TechDraw/Gui/PagePrinter.cpp b/src/Mod/TechDraw/Gui/PagePrinter.cpp
index 49b0411741..e8548f0258 100644
--- a/src/Mod/TechDraw/Gui/PagePrinter.cpp
+++ b/src/Mod/TechDraw/Gui/PagePrinter.cpp
@@ -305,7 +305,7 @@ void PagePrinter::renderPage(ViewProviderPage* vpp, QPainter& painter, QRectF& s
 
 
 /// print the Page associated with the view provider
-void PagePrinter::print(ViewProviderPage* vpPage, QPrinter* printer)
+void PagePrinter::print(ViewProviderPage* vpPage, QPrinter* printer, bool isPreview)
 {
     QPageLayout pageLayout = printer->pageLayout();
 
@@ -318,7 +318,8 @@ void PagePrinter::print(ViewProviderPage* vpPage, QPrinter* printer)
     QPainter painter(printer);
 
     auto ourScene = vpPage->getQGSPage();
-    if (!printer->outputFileName().isEmpty()) {
+    if (!printer->outputFileName().isEmpty() ||
+        isPreview) {
         ourScene->setExportingPdf(true);
     }
     auto ourDoc = Gui::Application::Instance->getDocument(dPage->getDocument());
diff --git a/src/Mod/TechDraw/Gui/PagePrinter.h b/src/Mod/TechDraw/Gui/PagePrinter.h
index ea43e94090..19ff8a7288 100644
--- a/src/Mod/TechDraw/Gui/PagePrinter.h
+++ b/src/Mod/TechDraw/Gui/PagePrinter.h
@@ -105,7 +105,7 @@ public:
     static PaperAttributes getPaperAttributes(TechDraw::DrawPage* pageObject);
     static PaperAttributes getPaperAttributes(ViewProviderPage* vpPage);
 
-    static void print(ViewProviderPage* vpPage, QPrinter* printer);
+    static void print(ViewProviderPage* vpPage, QPrinter* printer, bool isPreview = false);
     static void printPdf(ViewProviderPage* vpPage, const std::string& file);
     static void printAll(QPrinter* printer, App::Document* doc);
     static void printAllPdf(QPrinter* printer, App::Document* doc);