QPrinter: allow any margins when setting a fullpage QPageLayout

By default, QPrinter::setPageLayout correctly rejects a layout that
specifies margins outside the printable area. However, when the layout
specifies fullpage mode, that check should be skipped, since then one
should be allowed to target the unprintable area, by definition.

Fixes: QTBUG-118580
Pick-to: 6.5
Change-Id: I8bd93d11aefee0344725ac51c2490d029657f483
Reviewed-by: Laszlo Agocs <[email protected]>
(cherry picked from commit 2ac50bb0f539b1ee62503ff136063c693d4662e9)
Reviewed-by: Qt Cherry-pick Bot <[email protected]>

1 files changed, 4 insertions, 0 deletions

diff --git a/src/printsupport/kernel/qplatformprintdevice.cpp b/src/printsupport/kernel/qplatformprintdevice.cpp
index 0ea0242edd4..a2ee51f8872 100644
--- a/src/printsupport/kernel/qplatformprintdevice.cpp
+++ b/src/printsupport/kernel/qplatformprintdevice.cpp
@@ -75,6 +75,10 @@ bool QPlatformPrintDevice::isValidPageLayout(const QPageLayout &layout, int reso
     if (!supportedPageSize(layout.pageSize()).isValid())
         return false;
 
+    // In fullpage mode, margins outside the printable area are valid
+    if (layout.mode() == QPageLayout::FullPageMode)
+        return true;
+
     // Check the margins are valid
     QMarginsF pointMargins = layout.margins(QPageLayout::Point);
     QMarginsF printMargins = printableMargins(layout.pageSize(), layout.orientation(), resolution);