From ad70659a666987951061d73aebe4b9410ed96eb0 Mon Sep 17 00:00:00 2001
From: ThomasV <thomasv@electrum.org>
Date: Fri, 6 May 2022 11:33:10 +0200
Subject: [PATCH] qr code widget: set margin to zero, print warning if cannot
 draw

---
 electrum/gui/qt/qrcodewidget.py | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/electrum/gui/qt/qrcodewidget.py b/electrum/gui/qt/qrcodewidget.py
index f6e26ae0b..8db21dcdf 100644
--- a/electrum/gui/qt/qrcodewidget.py
+++ b/electrum/gui/qt/qrcodewidget.py
@@ -20,6 +20,7 @@ class QRCodeWidget(QWidget):
         QWidget.__init__(self)
         self.data = None
         self.qr = None
+        self.margin = 0
         self.fixedSize=fixedSize
         if fixedSize:
             self.setFixedSize(fixedSize, fixedSize)
@@ -69,10 +70,10 @@ class QRCodeWidget(QWidget):
         qp = QtGui.QPainter()
         qp.begin(self)
         r = qp.viewport()
-
-        margin = 10
         framesize = min(r.width(), r.height())
-        boxsize = int((framesize - 2*margin)/k)
+        boxsize = int((framesize - 2*self.margin)/k)
+        if boxsize < 2:
+            print('Warning: cannot draw qr code, boxsize too small')
         size = k*boxsize
         left = (framesize - size)/2
         top = (framesize - size)/2