QrCodeGenDialog: hide margin widgets with zxing >= 3.0

After
commit 2baf1bceff
Author: Xisco Fauli <xiscofauli@libreoffice.org>
Date:   Fri Feb 27 12:23:31 2026 +0100

    zxing: use new CreateBarcode API with zxing >= 3.0

Change-Id: Ic1207b24c4df40ebc2ef3def677615f85e8b3ed9
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/200883
Tested-by: Jenkins
Reviewed-by: Xisco Fauli <xiscofauli@libreoffice.org>

cui/source/dialogs/QrCodeGenDialog.cxx

@@ -210,12 +210,19 @@ QrCodeGenDialog::QrCodeGenDialog(weld::Widget* pParent, Reference<XModel> xModel
               m_xBuilder->weld_radio_button(u"button_medium"_ustr),
               m_xBuilder->weld_radio_button(u"button_quartile"_ustr),
               m_xBuilder->weld_radio_button(u"button_high"_ustr) }
+    , m_xLabelMargin(m_xBuilder->weld_label(u"label_margin"_ustr))
     , m_xSpinBorder(m_xBuilder->weld_spin_button(u"edit_margin"_ustr))
     , m_xComboType(m_xBuilder->weld_combo_box(u"choose_type"_ustr))
 #if ENABLE_ZXING
     , mpParent(pParent)
 #endif
 {
+#if ZXING_VERSION_MAJOR >= 3
+    // The new API simply does not allow to specify an arbitrary number of margin pixels.
+    m_xLabelMargin->hide();
+    m_xSpinBorder->hide();
+#endif
+
     m_xEdittext->set_size_request(m_xEdittext->get_approximate_digit_width() * 28,
                                   m_xEdittext->get_height_rows(6));
     if (!bEditExisting)

cui/source/inc/QrCodeGenDialog.hxx

@@ -40,6 +40,7 @@ private:
     css::uno::Reference<css::frame::XModel> m_xModel;
     std::unique_ptr<weld::TextView> m_xEdittext;
     std::unique_ptr<weld::RadioButton> m_xECC[4];
+    std::unique_ptr<weld::Label> m_xLabelMargin;
     std::unique_ptr<weld::SpinButton> m_xSpinBorder;
     std::unique_ptr<weld::ComboBox> m_xComboType;