diff --git a/qt4/main.cpp b/qt4/main.cpp
index bbcf226..a2c155c 100644
--- a/qt4/main.cpp
+++ b/qt4/main.cpp
@@ -1,401 +1,401 @@
 /* main.cpp - A Qt dialog for PIN entry.
  * Copyright (C) 2002, 2008 Klarälvdalens Datakonsult AB (KDAB)
  * Copyright (C) 2003 g10 Code GmbH
  * Copyright 2007 Ingo Klöcker
  *
  * Written by Steffen Hansen <steffen@klaralvdalens-datakonsult.se>.
  * Modified by Marcus Brinkmann <marcus@g10code.de>.
  * Modified by Marc Mutz <marc@kdab.com>
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
  * published by the Free Software Foundation; either version 2 of the
  * License, or (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful, but
  * WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, see <https://www.gnu.org/licenses/>.
  * SPDX-License-Identifier: GPL-2.0+
  */
 
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
 #include "pinentryconfirm.h"
 #include "pinentrydialog.h"
 #include "pinentry.h"
 
 #include <QApplication>
 #include <QDebug>
 #include <QIcon>
 #include <QMessageBox>
 #include <QPushButton>
 #include <QString>
 #include <QWidget>
 #if QT_VERSION >= 0x050000
 #include <QWindow>
 #endif
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <errno.h>
 
 #include <stdexcept>
 #include <gpg-error.h>
 
 #ifdef FALLBACK_CURSES
 #include <pinentry-curses.h>
 #endif
 
 #if QT_VERSION >= 0x050000 && defined(QT_STATIC)
   #include <QtPlugin>
   #ifdef Q_OS_WIN
     #include <windows.h>
     #include <shlobj.h>
     Q_IMPORT_PLUGIN(QWindowsIntegrationPlugin)
   #elif defined(Q_OS_MAC)
     Q_IMPORT_PLUGIN(QCocoaIntegrationPlugin)
   #else
     Q_IMPORT_PLUGIN(QXcbIntegrationPlugin)
   #endif
 #endif
 
 #ifdef Q_OS_WIN
 #include <windows.h>
 #endif
 
 static QString escape_accel(const QString &s)
 {
 
     QString result;
     result.reserve(s.size());
 
     bool afterUnderscore = false;
 
     for (unsigned int i = 0, end = s.size() ; i != end ; ++i) {
         const QChar ch = s[i];
         if (ch == QLatin1Char('_')) {
             if (afterUnderscore) { // escaped _
                 result += QLatin1Char('_');
                 afterUnderscore = false;
             } else { // accel
                 afterUnderscore = true;
             }
         } else {
             if (afterUnderscore ||  // accel
                     ch == QLatin1Char('&')) {  // escape & from being interpreted by Qt
                 result += QLatin1Char('&');
             }
             result += ch;
             afterUnderscore = false;
         }
     }
 
     if (afterUnderscore)
         // trailing single underscore: shouldn't happen, but deal with it robustly:
     {
         result += QLatin1Char('_');
     }
 
     return result;
 }
 
 namespace
 {
 class InvalidUtf8 : public std::invalid_argument
 {
 public:
     InvalidUtf8() : std::invalid_argument("invalid utf8") {}
     ~InvalidUtf8() throw() {}
 };
 }
 
 static const bool GPG_AGENT_IS_PORTED_TO_ONLY_SEND_UTF8 = false;
 
 static QString from_utf8(const char *s)
 {
     const QString result = QString::fromUtf8(s);
     if (result.contains(QChar::ReplacementCharacter)) {
         if (GPG_AGENT_IS_PORTED_TO_ONLY_SEND_UTF8) {
             throw InvalidUtf8();
         } else {
             return QString::fromLocal8Bit(s);
         }
     }
 
     return result;
 }
 
 static void
 setup_foreground_window(QWidget *widget, WId parentWid)
 {
 #if QT_VERSION >= 0x050000
     /* For windows set the desktop window as the transient parent */
     QWindow *parentWindow = nullptr;
     if (parentWid) {
         parentWindow = QWindow::fromWinId(parentWid);
     }
 #ifdef Q_OS_WIN
     if (!parentWindow) {
         HWND desktop = GetDesktopWindow();
         if (desktop) {
             parentWindow = QWindow::fromWinId((WId) desktop);
         }
     }
 #endif
     if (parentWindow) {
         // Ensure that we have a native wid
         widget->winId();
         QWindow *wndHandle = widget->windowHandle();
 
         if (wndHandle) {
             wndHandle->setTransientParent(parentWindow);
         }
     }
 #endif
     widget->setWindowFlags(Qt::Window |
                            Qt::CustomizeWindowHint |
                            Qt::WindowTitleHint |
                            Qt::WindowCloseButtonHint |
                            Qt::WindowStaysOnTopHint |
                            Qt::WindowMinimizeButtonHint);
 }
 
 static int
 qt_cmd_handler(pinentry_t pe)
 {
     char *str;
 
     int want_pass = !!pe->pin;
 
     const QString ok =
         pe->ok             ? escape_accel(from_utf8(pe->ok)) :
         pe->default_ok     ? escape_accel(from_utf8(pe->default_ok)) :
         /* else */           QLatin1String("&OK") ;
     const QString cancel =
         pe->cancel         ? escape_accel(from_utf8(pe->cancel)) :
         pe->default_cancel ? escape_accel(from_utf8(pe->default_cancel)) :
         /* else */           QLatin1String("&Cancel") ;
 
     str = pinentry_get_title (pe);
     const QString title =
         str       ? from_utf8(str) :
         /* else */  QLatin1String("pinentry-qt") ;
     free (str);
 
     const QString repeatError =
         pe->repeat_error_string ? from_utf8(pe->repeat_error_string) :
                                   QLatin1String("Passphrases do not match");
     const QString repeatString =
         pe->repeat_passphrase ? from_utf8(pe->repeat_passphrase) :
                                 QString();
     const QString visibilityTT =
         pe->default_tt_visi ? from_utf8(pe->default_tt_visi) :
                               QLatin1String("Show passphrase");
     const QString hideTT =
         pe->default_tt_hide ? from_utf8(pe->default_tt_hide) :
                               QLatin1String("Hide passphrase");
 
     const QString generateLbl = pe->genpin_label ? from_utf8(pe->genpin_label) :
                                 QString();
     const QString generateTT = pe->genpin_tt ? from_utf8(pe->genpin_tt) :
                                QString();
 
 
     if (want_pass) {
         char *str;
 
-        PinEntryDialog pinentry(nullptr, 0, pe->timeout, true, !!pe->quality_bar,
+        PinEntryDialog pinentry(NULL, 0, pe->timeout, true, !!pe->quality_bar,
                                 repeatString, visibilityTT, hideTT);
         setup_foreground_window(&pinentry, pe->parent_wid);
         pinentry.setPinentryInfo(pe);
         pinentry.setPrompt(escape_accel(from_utf8(pe->prompt)));
         pinentry.setDescription(from_utf8(pe->description));
         pinentry.setRepeatErrorText(repeatError);
         pinentry.setGenpinLabel(generateLbl);
         pinentry.setGenpinTT(generateTT);
 
         str = pinentry_get_title (pe);
         if (str) {
             pinentry.setWindowTitle(from_utf8(str));
             free (str);
         }
 
         /* If we reuse the same dialog window.  */
         pinentry.setPin(QString());
 
         pinentry.setOkText(ok);
         pinentry.setCancelText(cancel);
         if (pe->error) {
             pinentry.setError(from_utf8(pe->error));
         }
         if (pe->quality_bar) {
             pinentry.setQualityBar(from_utf8(pe->quality_bar));
         }
         if (pe->quality_bar_tt) {
             pinentry.setQualityBarTT(from_utf8(pe->quality_bar_tt));
         }
         bool ret = pinentry.exec();
         if (!ret) {
             if (pinentry.timedOut())
                 pe->specific_err = gpg_error (GPG_ERR_TIMEOUT);
             return -1;
         }
 
         const QString pinStr = pinentry.pin();
         QByteArray pin = pinStr.toUtf8();
 
         if (!!pe->repeat_passphrase) {
             /* Should not have been possible to accept
                the dialog in that case but we do a safety
                check here */
             pe->repeat_okay = (pinStr == pinentry.repeatedPin());
         }
 
         int len = strlen(pin.constData());
         if (len >= 0) {
             pinentry_setbufferlen(pe, len + 1);
             if (pe->pin) {
                 strcpy(pe->pin, pin.constData());
                 return len;
             }
         }
         return -1;
     } else {
         const QString desc  = pe->description ? from_utf8(pe->description) : QString();
         const QString notok = pe->notok       ? escape_accel(from_utf8(pe->notok)) : QString();
 
         const QMessageBox::StandardButtons buttons =
             pe->one_button ? QMessageBox::Ok :
             pe->notok      ? QMessageBox::Yes | QMessageBox::No | QMessageBox::Cancel :
             /* else */       QMessageBox::Ok | QMessageBox::Cancel ;
 
-        PinentryConfirm box(QMessageBox::Information, pe->timeout, title, desc, buttons, nullptr);
+        PinentryConfirm box(QMessageBox::Information, pe->timeout, title, desc, buttons, NULL);
         setup_foreground_window(&box, pe->parent_wid);
 
         const struct {
             QMessageBox::StandardButton button;
             QString label;
         } buttonLabels[] = {
             { QMessageBox::Ok,     ok     },
             { QMessageBox::Yes,    ok     },
             { QMessageBox::No,     notok  },
             { QMessageBox::Cancel, cancel },
         };
 
         for (size_t i = 0 ; i < sizeof buttonLabels / sizeof * buttonLabels ; ++i)
             if ((buttons & buttonLabels[i].button) && !buttonLabels[i].label.isEmpty()) {
                 box.button(buttonLabels[i].button)->setText(buttonLabels[i].label);
 #ifndef QT_NO_ACCESSIBILITY
                 box.button(buttonLabels[i].button)->setAccessibleDescription(buttonLabels[i].label);
 #endif
             }
 
         box.setIconPixmap(icon());
 
         if (!pe->one_button) {
             box.setDefaultButton(QMessageBox::Cancel);
         }
 
         box.show();
         raiseWindow(&box);
 
         const int rc = box.exec();
 
         if (rc == QMessageBox::Cancel) {
             pe->canceled = true;
         }
         if (box.timedOut()) {
           pe->specific_err = gpg_error (GPG_ERR_TIMEOUT);
         }
 
         return rc == QMessageBox::Ok || rc == QMessageBox::Yes ;
 
     }
 }
 
 static int
 qt_cmd_handler_ex(pinentry_t pe)
 {
     try {
         return qt_cmd_handler(pe);
     } catch (const InvalidUtf8 &) {
         pe->locale_err = true;
         return pe->pin ? -1 : false ;
     } catch (...) {
         pe->canceled = true;
         return pe->pin ? -1 : false ;
     }
 }
 
 pinentry_cmd_handler_t pinentry_cmd_handler = qt_cmd_handler_ex;
 
 int
 main(int argc, char *argv[])
 {
     pinentry_init("pinentry-qt");
 
     QApplication *app = NULL;
     int new_argc = 0;
 
 #ifdef FALLBACK_CURSES
     if (!pinentry_have_display(argc, argv)) {
         pinentry_cmd_handler = curses_cmd_handler;
         pinentry_set_flavor_flag ("curses");
     } else
 #endif
     {
         /* Qt does only understand -display but not --display; thus we
            are fixing that here.  The code is pretty simply and may get
            confused if an argument is called "--display". */
         char **new_argv, *p;
         size_t n;
         int i, done;
 
         for (n = 0, i = 0; i < argc; i++) {
             n += strlen(argv[i]) + 1;
         }
         n++;
         new_argv = (char **)calloc(argc + 1, sizeof * new_argv);
         if (new_argv) {
             *new_argv = (char *)malloc(n);
         }
         if (!new_argv || !*new_argv) {
             fprintf(stderr, "pinentry-qt: can't fixup argument list: %s\n",
                     strerror(errno));
             exit(EXIT_FAILURE);
 
         }
         for (done = 0, p = *new_argv, i = 0; i < argc; i++)
             if (!done && !strcmp(argv[i], "--display")) {
                 new_argv[i] = strcpy(p, argv[i] + 1);
                 p += strlen(argv[i] + 1) + 1;
                 done = 1;
             } else {
                 new_argv[i] = strcpy(p, argv[i]);
                 p += strlen(argv[i]) + 1;
             }
 
         /* Note: QApplication uses int &argc so argc has to be valid
          * for the full lifetime of the application.
          *
          * As Qt might modify argc / argv we use copies here so that
          * we do not loose options that are handled in both. e.g. display.
          */
         new_argc = argc;
         Q_ASSERT (new_argc);
         app = new QApplication(new_argc, new_argv);
         app->setWindowIcon(QIcon(QLatin1String(":/document-encrypt.png")));
     }
 
     pinentry_parse_opts(argc, argv);
 
     int rc = pinentry_loop();
     delete app;
     return rc ? EXIT_FAILURE : EXIT_SUCCESS ;
 }
diff --git a/qt4/pinentrydialog.cpp b/qt4/pinentrydialog.cpp
index 1b2be36..0c4e385 100644
--- a/qt4/pinentrydialog.cpp
+++ b/qt4/pinentrydialog.cpp
@@ -1,511 +1,511 @@
 /* pinentrydialog.cpp - A (not yet) secure Qt 4 dialog for PIN entry.
  * Copyright (C) 2002, 2008 Klarälvdalens Datakonsult AB (KDAB)
  * Copyright 2007 Ingo Klöcker
  * Copyright 2016 Intevation GmbH
  *
  * Written by Steffen Hansen <steffen@klaralvdalens-datakonsult.se>.
  * Modified by Andre Heinecke <aheinecke@intevation.de>
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
  * published by the Free Software Foundation; either version 2 of the
  * License, or (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful, but
  * WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, see <https://www.gnu.org/licenses/>.
  * SPDX-License-Identifier: GPL-2.0+
  */
 
 #include "pinentrydialog.h"
 #include <QGridLayout>
 
 #include <QProgressBar>
 #include <QApplication>
 #include <QFontMetrics>
 #include <QStyle>
 #include <QPainter>
 #include <QPushButton>
 #include <QDialogButtonBox>
 #include <QKeyEvent>
 #include <QLabel>
 #include <QPalette>
 #include <QLineEdit>
 #include <QAction>
 #include <QCheckBox>
 #include "pinlineedit.h"
 
 #include <QDebug>
 
 #ifdef Q_OS_WIN
 #include <windows.h>
 #if QT_VERSION >= 0x050700
 #include <QtPlatformHeaders/QWindowsWindowFunctions>
 #endif
 #endif
 
 void raiseWindow(QWidget *w)
 {
 #ifdef Q_OS_WIN
 #if QT_VERSION >= 0x050700
     QWindowsWindowFunctions::setWindowActivationBehavior(
             QWindowsWindowFunctions::AlwaysActivateWindow);
 #endif
 #endif
     w->setWindowState((w->windowState() & ~Qt::WindowMinimized) | Qt::WindowActive);
     w->activateWindow();
     w->raise();
 }
 
 QPixmap icon(QStyle::StandardPixmap which)
 {
     QPixmap pm = qApp->windowIcon().pixmap(48, 48);
 
     if (which != QStyle::SP_CustomBase) {
         const QIcon ic = qApp->style()->standardIcon(which);
         QPainter painter(&pm);
         const int emblemSize = 22;
         painter.drawPixmap(pm.width() - emblemSize, 0,
                            ic.pixmap(emblemSize, emblemSize));
     }
 
     return pm;
 }
 
 void PinEntryDialog::slotTimeout()
 {
     _timed_out = true;
     reject();
 }
 
 PinEntryDialog::PinEntryDialog(QWidget *parent, const char *name,
                                int timeout, bool modal, bool enable_quality_bar,
                                const QString &repeatString,
                                const QString &visibilityTT,
                                const QString &hideTT)
     : QDialog(parent),
       mRepeat(NULL),
       _grabbed(false),
       _disable_echo_allowed(true),
       mVisibilityTT(visibilityTT),
       mHideTT(hideTT),
       mVisiActionEdit(NULL),
       mGenerateActionEdit(NULL),
       mVisiCB(NULL)
 {
     _timed_out = false;
 
     if (modal) {
         setWindowModality(Qt::ApplicationModal);
     }
 
     _icon = new QLabel(this);
     _icon->setPixmap(icon());
 
     _error = new QLabel(this);
     QPalette pal;
     pal.setColor(QPalette::WindowText, Qt::red);
     _error->setPalette(pal);
     _error->hide();
 
     _desc = new QLabel(this);
     _desc->hide();
 
     _prompt = new QLabel(this);
     _prompt->hide();
 
     _edit = new PinLineEdit(this);
     _edit->setMaxLength(256);
     _edit->setMinimumWidth(_edit->fontMetrics().averageCharWidth()*20 + 48);
     _edit->setEchoMode(QLineEdit::Password);
 
     _prompt->setBuddy(_edit);
 
     if (enable_quality_bar) {
         _quality_bar_label = new QLabel(this);
         _quality_bar_label->setAlignment(Qt::AlignVCenter);
         _quality_bar = new QProgressBar(this);
         _quality_bar->setAlignment(Qt::AlignCenter);
         _have_quality_bar = true;
     } else {
         _have_quality_bar = false;
     }
 
     QDialogButtonBox *const buttons = new QDialogButtonBox(this);
     buttons->setStandardButtons(QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
     _ok = buttons->button(QDialogButtonBox::Ok);
     _cancel = buttons->button(QDialogButtonBox::Cancel);
 
     _ok->setDefault(true);
 
     if (style()->styleHint(QStyle::SH_DialogButtonBox_ButtonsHaveIcons)) {
         _ok->setIcon(style()->standardIcon(QStyle::SP_DialogOkButton));
         _cancel->setIcon(style()->standardIcon(QStyle::SP_DialogCancelButton));
     }
 
     if (timeout > 0) {
         _timer = new QTimer(this);
         connect(_timer, SIGNAL(timeout()), this, SLOT(slotTimeout()));
         _timer->start(timeout * 1000);
     } else {
         _timer = NULL;
     }
 
     connect(buttons, SIGNAL(accepted()), this, SLOT(accept()));
     connect(buttons, SIGNAL(rejected()), this, SLOT(reject()));
     connect(_edit, SIGNAL(textChanged(QString)),
             this, SLOT(updateQuality(QString)));
     connect(_edit, SIGNAL(textChanged(QString)),
             this, SLOT(textChanged(QString)));
     connect(_edit, SIGNAL(backspacePressed()),
             this, SLOT(onBackspace()));
 
     QGridLayout *const grid = new QGridLayout(this);
     int row = 1;
     grid->addWidget(_error, row++, 1, 1, 2);
     grid->addWidget(_desc,  row++, 1, 1, 2);
     //grid->addItem( new QSpacerItem( 0, _edit->height() / 10, QSizePolicy::Minimum, QSizePolicy::Fixed ), 1, 1 );
     grid->addWidget(_prompt, row, 1);
     grid->addWidget(_edit, row++, 2);
     if (!repeatString.isNull()) {
         mRepeat = new QLineEdit;
         mRepeat->setMaxLength(256);
         mRepeat->setEchoMode(QLineEdit::Password);
         connect(mRepeat, SIGNAL(textChanged(QString)),
                 this, SLOT(textChanged(QString)));
         QLabel *repeatLabel = new QLabel(repeatString);
         repeatLabel->setBuddy(mRepeat);
         grid->addWidget(repeatLabel, row, 1);
         grid->addWidget(mRepeat, row++, 2);
         setTabOrder(_edit, mRepeat);
         setTabOrder(mRepeat, _ok);
     }
     if (enable_quality_bar) {
         grid->addWidget(_quality_bar_label, row, 1);
         grid->addWidget(_quality_bar, row++, 2);
     }
     /* Set up the show password action */
     const QIcon visibilityIcon = QIcon::fromTheme(QLatin1String("visibility"));
     const QIcon hideIcon = QIcon::fromTheme(QLatin1String("hint"));
     const QIcon generateIcon = QIcon(); /* Disabled for now
                                          QIcon::fromTheme(QLatin1String("password-generate")); */
 #if QT_VERSION >= 0x050200
     if (!generateIcon.isNull()) {
         mGenerateActionEdit = _edit->addAction(generateIcon,
                                                QLineEdit::LeadingPosition);
         mGenerateActionEdit->setToolTip(mGenerateTT);
         connect(mGenerateActionEdit, SIGNAL(triggered()), this, SLOT(generatePin()));
     }
     if (!visibilityIcon.isNull() && !hideIcon.isNull()) {
         mVisiActionEdit = _edit->addAction(visibilityIcon, QLineEdit::TrailingPosition);
         mVisiActionEdit->setVisible(false);
         mVisiActionEdit->setToolTip(mVisibilityTT);
         connect(mVisiActionEdit, SIGNAL(triggered()), this, SLOT(toggleVisibility()));
     } else
 #endif
     {
         if (!mVisibilityTT.isNull()) {
             mVisiCB = new QCheckBox(mVisibilityTT);
             connect(mVisiCB, SIGNAL(toggled(bool)), this, SLOT(toggleVisibility()));
             grid->addWidget(mVisiCB, row++, 1, 1, 2, Qt::AlignLeft);
         }
     }
     grid->addWidget(buttons, ++row, 0, 1, 3);
 
     grid->addWidget(_icon, 0, 0, row - 1, 1, Qt::AlignVCenter | Qt::AlignLeft);
 
     grid->setSizeConstraint(QLayout::SetFixedSize);
 
 
     connect(qApp, SIGNAL(focusChanged(QWidget *, QWidget *)),
             this, SLOT(focusChanged(QWidget *, QWidget *)));
 
 #if QT_VERSION >= 0x050000
     /* This is mostly an issue on Windows where this results
        in the pinentry popping up nicely with an animation and
        comes to front. It is not ifdefed for Windows only since
        window managers on Linux like KWin can also have this
        result in an animation when the pinentry is shown and
        not just popping it up.
     */
     setWindowState(Qt::WindowMinimized);
     QTimer::singleShot(0, this, [this] () {
         raiseWindow (this);
     });
 #else
     activateWindow();
     raise();
 #endif
 }
 
 void PinEntryDialog::showEvent(QShowEvent *event)
 {
     QDialog::showEvent(event);
     _edit->setFocus();
 }
 
 void PinEntryDialog::setDescription(const QString &txt)
 {
     _desc->setVisible(!txt.isEmpty());
     _desc->setText(txt);
 #ifndef QT_NO_ACCESSIBILITY
     _desc->setAccessibleDescription(txt);
 #endif
     _icon->setPixmap(icon());
     setError(QString());
 }
 
 QString PinEntryDialog::description() const
 {
     return _desc->text();
 }
 
 void PinEntryDialog::setError(const QString &txt)
 {
     if (!txt.isNull()) {
         _icon->setPixmap(icon(QStyle::SP_MessageBoxCritical));
     }
     _error->setText(txt);
 #ifndef QT_NO_ACCESSIBILITY
     _error->setAccessibleDescription(txt);
 #endif
     _error->setVisible(!txt.isEmpty());
 }
 
 QString PinEntryDialog::error() const
 {
     return _error->text();
 }
 
 void PinEntryDialog::setPin(const QString &txt)
 {
     _edit->setText(txt);
 }
 
 QString PinEntryDialog::pin() const
 {
     return _edit->text();
 }
 
 void PinEntryDialog::setPrompt(const QString &txt)
 {
     _prompt->setText(txt);
     _prompt->setVisible(!txt.isEmpty());
     if (txt.contains("PIN"))
       _disable_echo_allowed = false;
 }
 
 QString PinEntryDialog::prompt() const
 {
     return _prompt->text();
 }
 
 void PinEntryDialog::setOkText(const QString &txt)
 {
     _ok->setText(txt);
 #ifndef QT_NO_ACCESSIBILITY
     _ok->setAccessibleDescription(txt);
 #endif
     _ok->setVisible(!txt.isEmpty());
 }
 
 void PinEntryDialog::setCancelText(const QString &txt)
 {
     _cancel->setText(txt);
 #ifndef QT_NO_ACCESSIBILITY
     _cancel->setAccessibleDescription(txt);
 #endif
     _cancel->setVisible(!txt.isEmpty());
 }
 
 void PinEntryDialog::setQualityBar(const QString &txt)
 {
     if (_have_quality_bar) {
         _quality_bar_label->setText(txt);
 #ifndef QT_NO_ACCESSIBILITY
         _quality_bar_label->setAccessibleDescription(txt);
 #endif
     }
 }
 
 void PinEntryDialog::setQualityBarTT(const QString &txt)
 {
     if (_have_quality_bar) {
         _quality_bar->setToolTip(txt);
     }
 }
 
 void PinEntryDialog::setGenpinLabel(const QString &txt)
 {
     if (!mGenerateActionEdit) {
         return;
     }
     if (txt.isEmpty()) {
         mGenerateActionEdit->setVisible(false);
     } else {
         mGenerateActionEdit->setText(txt);
         mGenerateActionEdit->setVisible(true);
     }
 }
 
 void PinEntryDialog::setGenpinTT(const QString &txt)
 {
     if (mGenerateActionEdit) {
         mGenerateActionEdit->setToolTip(txt);
     }
 }
 
 void PinEntryDialog::onBackspace()
 {
     if (_disable_echo_allowed) {
         _edit->setEchoMode(QLineEdit::NoEcho);
         if (mRepeat) {
             mRepeat->setEchoMode(QLineEdit::NoEcho);
         }
     }
 }
 
 void PinEntryDialog::updateQuality(const QString &txt)
 {
     int length;
     int percent;
     QPalette pal;
 
     if (_timer) {
         _timer->stop();
     }
 
     _disable_echo_allowed = false;
 
     if (!_have_quality_bar || !_pinentry_info) {
         return;
     }
     const QByteArray utf8_pin = txt.toUtf8();
     const char *pin = utf8_pin.constData();
     length = strlen(pin);
     percent = length ? pinentry_inq_quality(_pinentry_info, pin, length) : 0;
     if (!length) {
         _quality_bar->reset();
     } else {
         pal = _quality_bar->palette();
         if (percent < 0) {
             pal.setColor(QPalette::Highlight, QColor("red"));
             percent = -percent;
         } else {
             pal.setColor(QPalette::Highlight, QColor("green"));
         }
         _quality_bar->setPalette(pal);
         _quality_bar->setValue(percent);
     }
 }
 
 void PinEntryDialog::setPinentryInfo(pinentry_t peinfo)
 {
     _pinentry_info = peinfo;
 }
 
 void PinEntryDialog::focusChanged(QWidget *old, QWidget *now)
 {
     // Grab keyboard. It might be a little weird to do it here, but it works!
     // Previously this code was in showEvent, but that did not work in Qt4.
     if (!_pinentry_info || _pinentry_info->grab) {
         if (_grabbed && old && (old == _edit || old == mRepeat)) {
             old->releaseKeyboard();
             _grabbed = false;
         }
         if (!_grabbed && now && (now == _edit || now == mRepeat)) {
             now->grabKeyboard();
             _grabbed = true;
         }
     }
 
 }
 
 void PinEntryDialog::textChanged(const QString &text)
 {
     Q_UNUSED(text);
     if (mRepeat && mRepeat->text() == _edit->text()) {
         _ok->setEnabled(true);
         _ok->setToolTip(QString());
     } else if (mRepeat) {
         _ok->setEnabled(false);
         _ok->setToolTip(mRepeatError);
     }
 
     if (mVisiActionEdit && sender() == _edit) {
         mVisiActionEdit->setVisible(!_edit->text().isEmpty());
     }
     if (mGenerateActionEdit) {
         mGenerateActionEdit->setVisible(_edit->text().isEmpty() &&
                                         _pinentry_info->genpin_label);
     }
 }
 
 void PinEntryDialog::generatePin()
 {
     const char *pin = pinentry_inq_genpin(_pinentry_info);
     if (pin) {
         if (_edit->echoMode() == QLineEdit::Password) {
             toggleVisibility();
         }
-        const auto pinStr = QString::fromUtf8(pin);
+        const QString pinStr = QString::fromUtf8(pin);
         _edit->setText(pinStr);
         mRepeat->setText(pinStr);
     }
 }
 
 void PinEntryDialog::toggleVisibility()
 {
     if (sender() != mVisiCB) {
         if (_edit->echoMode() == QLineEdit::Password) {
             mVisiActionEdit->setIcon(QIcon::fromTheme(QLatin1String("hint")));
             mVisiActionEdit->setToolTip(mHideTT);
             _edit->setEchoMode(QLineEdit::Normal);
             if (mRepeat) {
                 mRepeat->setEchoMode(QLineEdit::Normal);
             }
         } else {
             mVisiActionEdit->setIcon(QIcon::fromTheme(QLatin1String("visibility")));
             mVisiActionEdit->setToolTip(mVisibilityTT);
             _edit->setEchoMode(QLineEdit::Password);
             if (mRepeat) {
                 mRepeat->setEchoMode(QLineEdit::Password);
             }
         }
     } else {
         if (mVisiCB->isChecked()) {
             if (mRepeat) {
                 mRepeat->setEchoMode(QLineEdit::Normal);
             }
             _edit->setEchoMode(QLineEdit::Normal);
         } else {
             if (mRepeat) {
                 mRepeat->setEchoMode(QLineEdit::Password);
             }
             _edit->setEchoMode(QLineEdit::Password);
         }
     }
 }
 
 QString PinEntryDialog::repeatedPin() const
 {
     if (mRepeat) {
         return mRepeat->text();
     }
     return QString();
 }
 
 bool PinEntryDialog::timedOut() const
 {
     return _timed_out;
 }
 
 void PinEntryDialog::setRepeatErrorText(const QString &err)
 {
     mRepeatError = err;
 }
 #include "pinentrydialog.moc"
diff --git a/qt4/pinlineedit.cpp b/qt4/pinlineedit.cpp
index c7c7f36..b05bd07 100644
--- a/qt4/pinlineedit.cpp
+++ b/qt4/pinlineedit.cpp
@@ -1,36 +1,36 @@
 /* pinlineedit.cpp - Modified QLineEdit widget.
  * Copyright (C) 2018 Damien Goutte-Gattat
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
  * published by the Free Software Foundation; either version 2 of the
  * License, or (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful, but
  * WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  * General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, see <https://www.gnu.org/licenses/>.
  * SPDX-License-Identifier: GPL-2.0+
  */
 
 #include "pinlineedit.h"
 
 #include <QKeyEvent>
 
 PinLineEdit::PinLineEdit(QWidget *parent) : QLineEdit(parent)
 {
 }
 
 void
 PinLineEdit::keyPressEvent(QKeyEvent *e)
 {
     QLineEdit::keyPressEvent(e);
 
-    if ( e->key() == Qt::Key::Key_Backspace )
+    if ( e->key() == Qt::Key_Backspace )
 	emit backspacePressed();
 }
 
 #include "pinlineedit.moc"