From 0a82d5890998a1cddcf2660a7a5c91b74d71ac4a Mon Sep 17 00:00:00 2001
From: ANISH M <58029804+Anish-M-code@users.noreply.github.com>
Date: Thu, 16 Mar 2023 19:54:15 +0530
Subject: [PATCH] Make Qt auto-detect the preferred page size for printer

-> Removes need for hard-coded paper size in printer configuration
---
 src/qt/utilitydialog.cpp | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/src/qt/utilitydialog.cpp b/src/qt/utilitydialog.cpp
index 82abee656..cee764b61 100644
--- a/src/qt/utilitydialog.cpp
+++ b/src/qt/utilitydialog.cpp
@@ -58,6 +58,7 @@
 #include <QtPrintSupport/QPrinter>
 #include <QtPrintSupport/QPrintDialog>
 #include <QtPrintSupport/QPrintPreviewDialog>
+#include <QtPrintSupport/QPrinterInfo>
 #endif
 #include <QPainter>
 #include "walletmodel.h"
@@ -347,17 +348,25 @@ void PaperWalletDialog::on_printButton_clicked()
     QPrinter printer(QPrinter::HighResolution);
     QPrintDialog* qpd = new QPrintDialog(&printer, this);
 
-    qpd->setPrintRange(QAbstractPrintDialog::AllPages);
+    #if QT_VERSION > 0x050000
+    QPrinterInfo printerinfo(printer);
+    QPageSize papersize = printerinfo.defaultPageSize();
+    #endif
 
+    qpd->setPrintRange(QAbstractPrintDialog::AllPages);
     QList<QString> recipientPubKeyHashes;
 
     if (qpd->exec() != QDialog::Accepted) {
         return;
     }
 
-    // Hardcode these values
+
     printer.setOrientation(QPrinter::Portrait);
+    #if QT_VERSION > 0x050000
+    printer.QPagedPaintDevice::setPageSize(papersize);
+    #else
     printer.setPaperSize(QPrinter::A4);
+    #endif
     printer.setFullPage(true);
 
     QPainter painter;