Qt Designer: Replace QLatin1String by modern literals

Pick-to: 6.5
Change-Id: I1a76bf2224795275a8c62cf37144936bda87cbca
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>

17 files changed, 60 insertions, 74 deletions

diff --git a/src/designer/src/components/formeditor/qdesigner_resource.cpp b/src/designer/src/components/formeditor/qdesigner_resource.cpp
index d63f36c3c..4f7832b79 100644
--- a/src/designer/src/components/formeditor/qdesigner_resource.cpp
+++ b/src/designer/src/components/formeditor/qdesigner_resource.cpp
@@ -951,8 +951,8 @@ void QDesignerResource::applyProperties(QObject *o, const QList<DomProperty*> &p
         if (isDeprecatedQt5Property(o, p)) // ### fixme Qt 7 remove this
             continue; // ### fixme Qt 7 remove this: Exclude deprecated value of Qt 5.
         QString propertyName = p->attributeName();
-        if (propertyName == QLatin1String("numDigits") && o->inherits("QLCDNumber")) // Deprecated in Qt 4, removed in Qt 5.
-            propertyName = QLatin1String("digitCount");
+        if (propertyName == "numDigits"_L1 && o->inherits("QLCDNumber")) // Deprecated in Qt 4, removed in Qt 5.
+            propertyName = u"digitCount"_s;
         const int index = sheet->indexOf(propertyName);
         QVariant v;
         if (!readDomEnumerationValue(p, sheet, index, v))
@@ -1342,7 +1342,7 @@ DomWidget *QDesignerResource::saveWidget(QToolBar *toolBar, DomWidget *ui_parent
 
         attr = new DomProperty();
         attr->setAttributeName(u"toolBarBreak"_s);
-        attr->setElementBool(toolBarBreak ? QLatin1String("true") : QLatin1String("false"));
+        attr->setElementBool(toolBarBreak ? u"true"_s : u"false"_s);
         attributes  << attr;
         ui_widget->setElementAttribute(attributes);
     }
diff --git a/src/designer/src/components/propertyeditor/designerpropertymanager.cpp b/src/designer/src/components/propertyeditor/designerpropertymanager.cpp
index ca852e5ce..57152f3d2 100644
--- a/src/designer/src/components/propertyeditor/designerpropertymanager.cpp
+++ b/src/designer/src/components/propertyeditor/designerpropertymanager.cpp
@@ -1582,7 +1582,7 @@ QString DesignerPropertyManager::valueText(const QtProperty *property) const
         QVariant v = value(property);
         const QStringList list = v.metaType().id() == QMetaType::QStringList
             ? v.toStringList() : qvariant_cast<PropertySheetStringListValue>(v).value();
-        return list.join(QLatin1String("; "));
+        return list.join("; "_L1);
     }
     if (vType == designerKeySequenceTypeId()) {
         return qvariant_cast<PropertySheetKeySequenceValue>(value(property)).value().toString(QKeySequence::NativeText);
diff --git a/src/designer/src/components/propertyeditor/paletteeditor.cpp b/src/designer/src/components/propertyeditor/paletteeditor.cpp
index 3ff9c882c..b073bc0ba 100644
--- a/src/designer/src/components/propertyeditor/paletteeditor.cpp
+++ b/src/designer/src/components/propertyeditor/paletteeditor.cpp
@@ -313,7 +313,7 @@ static bool loadPalette(const QString &fileName, QPalette *pal, QString *errorMe
         *errorMessage = msgCannotReadPalette(fileName, reader);
         return false;
     }
-    if (reader.name() != QLatin1String("palette")) {
+    if (reader.name() != "palette"_L1) {
         const auto why = PaletteEditor::tr("Invalid element \"%1\", expected \"palette\".")
                          .arg(reader.name().toString());
         *errorMessage = msgCannotReadPalette(fileName, reader, why);
diff --git a/src/designer/src/components/propertyeditor/propertyeditor.cpp b/src/designer/src/components/propertyeditor/propertyeditor.cpp
index 751d92342..c7bfd2861 100644
--- a/src/designer/src/components/propertyeditor/propertyeditor.cpp
+++ b/src/designer/src/components/propertyeditor/propertyeditor.cpp
@@ -1006,8 +1006,8 @@ void PropertyEditor::setObject(QObject *object)
                     descriptionToolTip = customData.propertyToolTip(propertyName);
                 if (descriptionToolTip.isEmpty()) {
                     if (const char *typeS = typeName(type)) {
-                        descriptionToolTip = propertyName + QLatin1String(" (")
-                            + QLatin1String(typeS) + QLatin1Char(')');
+                        descriptionToolTip = propertyName + " ("_L1
+                            + QLatin1StringView(typeS) + ')'_L1;
                     }
                 }
                 if (!descriptionToolTip.isEmpty())
diff --git a/src/designer/src/designer/doc/snippets/plugins/doc_src_qtdesigner.cpp b/src/designer/src/designer/doc/snippets/plugins/doc_src_qtdesigner.cpp
index 9cb08e027..6ac5db04f 100644
--- a/src/designer/src/designer/doc/snippets/plugins/doc_src_qtdesigner.cpp
+++ b/src/designer/src/designer/doc/snippets/plugins/doc_src_qtdesigner.cpp
@@ -228,7 +228,7 @@ QDesignerPropertySheetExtension *propertySheet = nullptr;
 QExtensionManager manager = formEditor->extensionManager();
 
 propertySheet = qt_extension<QDesignerPropertySheetExtension*>(manager, widget);
-int index = propertySheet->indexOf(QLatin1String("margin"));
+int index = propertySheet->indexOf(u"margin"_s);
 
 propertySheet->setProperty(index, 10);
 propertySheet->setChanged(index, true);
diff --git a/src/designer/src/designer/qdesigner.cpp b/src/designer/src/designer/qdesigner.cpp
index 099e7509c..cc20413c5 100644
--- a/src/designer/src/designer/qdesigner.cpp
+++ b/src/designer/src/designer/qdesigner.cpp
@@ -147,9 +147,7 @@ static inline QDesigner::ParseArgumentsResult
     parseDesignerCommandLineArguments(QCommandLineParser &parser, Options *options,
                                       QString *errorMessage)
 {
-    parser.setApplicationDescription(u"Qt Designer "_s
-        + QLatin1String(QT_VERSION_STR)
-        + QLatin1String("\n\nUI designer for QWidget-based applications."));
+    parser.setApplicationDescription(u"Qt Designer " QT_VERSION_STR "\n\nUI designer for QWidget-based applications."_s);
     const QCommandLineOption helpOption = parser.addHelpOption();
     parser.setSingleDashWordOptionMode(QCommandLineParser::ParseAsLongOptions);
     const QCommandLineOption serverOption(u"server"_s,
diff --git a/src/designer/src/designer/qdesigner_actions.cpp b/src/designer/src/designer/qdesigner_actions.cpp
index ac85c91a6..ba3791f3d 100644
--- a/src/designer/src/designer/qdesigner_actions.cpp
+++ b/src/designer/src/designer/qdesigner_actions.cpp
@@ -799,7 +799,7 @@ bool QDesignerActions::writeOutForm(QDesignerFormWindowInterface *fw, const QStr
     if (check) {
         const QStringList problems = fw->checkContents();
         if (!problems.isEmpty())
-            QMessageBox::information(fw->window(), tr("Qt Designer"), problems.join(QLatin1String("<br>")));
+            QMessageBox::information(fw->window(), tr("Qt Designer"), problems.join("<br>"_L1));
     }
 
     QString contents = fw->contents();
diff --git a/src/designer/src/lib/shared/actioneditor_p.h b/src/designer/src/lib/shared/actioneditor_p.h
index 38dcebfe3..471d12d04 100644
--- a/src/designer/src/lib/shared/actioneditor_p.h
+++ b/src/designer/src/lib/shared/actioneditor_p.h
@@ -63,7 +63,7 @@ public:
     static void setObjectNamingMode(ObjectNamingMode n) { m_objectNamingMode = n; }
 
     static QString actionTextToName(const QString &text,
-                                    const QString &prefix = QLatin1String("action"));
+                                    const QString &prefix = QLatin1StringView("action"));
 
     // Utility to create a configure button with menu for usage on toolbars
     static QToolButton *createConfigureMenuButton(const QString &t, QMenu **ptrToMenu);
diff --git a/src/designer/src/lib/shared/codedialog.cpp b/src/designer/src/lib/shared/codedialog.cpp
index ae91ea6dc..639cd7da8 100644
--- a/src/designer/src/lib/shared/codedialog.cpp
+++ b/src/designer/src/lib/shared/codedialog.cpp
@@ -180,15 +180,15 @@ bool CodeDialog::showCodeDialog(const QDesignerFormWindowInterface *fw,
     dialog->setAttribute(Qt::WA_DeleteOnClose);
     dialog->setCode(code);
     dialog->setFormFileName(fw->fileName());
-    QString languageName;
+    QLatin1StringView languageName;
     switch (language) {
     case UicLanguage::Cpp:
-        languageName = QLatin1String("C++");
-        dialog->setMimeType(QLatin1String("text/x-chdr"));
+        languageName = "C++"_L1;
+        dialog->setMimeType(u"text/x-chdr"_s);
         break;
     case UicLanguage::Python:
-        languageName = QLatin1String("Python");
-        dialog->setMimeType(QLatin1String("text/x-python"));
+        languageName = "Python"_L1;
+        dialog->setMimeType(u"text/x-python"_s);
         break;
     }
     dialog->setWindowTitle(tr("%1 - [%2 Code]").
@@ -212,8 +212,8 @@ void CodeDialog::slotSaveAs()
     if (!uiFile.isEmpty()) {
         QFileInfo uiFi(uiFile);
         fileDialog.setDirectory(uiFi.absolutePath());
-        fileDialog.selectFile(QLatin1String("ui_") + uiFi.baseName()
-                              + QLatin1Char('.') + suffix);
+        fileDialog.selectFile("ui_"_L1 + uiFi.baseName()
+                              + '.'_L1 + suffix);
     }
 
     while (true) {
diff --git a/src/designer/src/lib/shared/htmlhighlighter.cpp b/src/designer/src/lib/shared/htmlhighlighter.cpp
index 6f7bbfc24..dead3a100 100644
--- a/src/designer/src/lib/shared/htmlhighlighter.cpp
+++ b/src/designer/src/lib/shared/htmlhighlighter.cpp
@@ -8,6 +8,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 namespace qdesigner_internal {
 
 HtmlHighlighter::HtmlHighlighter(QTextEdit *textEdit)
@@ -55,9 +57,6 @@ void HtmlHighlighter::highlightBlock(const QString &text)
     static const QLatin1Char apos = QLatin1Char('\'');
     static const QLatin1Char semicolon = QLatin1Char(';');
     static const QLatin1Char equals = QLatin1Char('=');
-    static const QLatin1String startComment("<!--");
-    static const QLatin1String endComment("-->");
-    static const QLatin1String endElement("/>");
 
     int state = previousBlockState();
     qsizetype len = text.size();
@@ -71,7 +70,7 @@ void HtmlHighlighter::highlightBlock(const QString &text)
             while (pos < len) {
                 QChar ch = text.at(pos);
                 if (ch == startTag) {
-                    if (text.mid(pos, 4) == startComment) {
+                    if (QStringView{text}.sliced(pos).startsWith("<!--"_L1)) {
                         state = InComment;
                     } else {
                         state = InTag;
@@ -79,9 +78,10 @@ void HtmlHighlighter::highlightBlock(const QString &text)
                         while (pos < len && text.at(pos) != space
                                && text.at(pos) != endTag
                                && text.at(pos) != tab
-                               && text.mid(pos, 2) != endElement)
+                               && !QStringView{text}.sliced(pos).startsWith("/>"_L1)) {
                             ++pos;
-                        if (text.mid(pos, 2) == endElement)
+                        }
+                        if (QStringView{text}.sliced(pos).startsWith("/>"_L1))
                             ++pos;
                         setFormat(start, pos - start,
                                   m_formats[Tag]);
@@ -104,7 +104,7 @@ void HtmlHighlighter::highlightBlock(const QString &text)
         case InComment:
             start = pos;
             for ( ; pos < len; ++pos) {
-                if (text.mid(pos, 3) == endComment) {
+                if (QStringView{text}.sliced(pos).startsWith("-->"_L1)) {
                     pos += 3;
                     state = NormalState;
                     break;
@@ -125,7 +125,7 @@ void HtmlHighlighter::highlightBlock(const QString &text)
                         setFormat(start, pos - start, m_formats[Tag]);
                         state = NormalState;
                         break;
-                    } else if (text.mid(pos, 2) == endElement) {
+                    } else if (QStringView{text}.sliced(pos).startsWith("/>"_L1)) {
                         pos += 2;
                         setFormat(start, pos - start, m_formats[Tag]);
                         state = NormalState;
diff --git a/src/designer/src/lib/shared/layout.cpp b/src/designer/src/lib/shared/layout.cpp
index 7ec7775e2..9c4be81a3 100644
--- a/src/designer/src/lib/shared/layout.cpp
+++ b/src/designer/src/lib/shared/layout.cpp
@@ -197,7 +197,7 @@ bool Layout::prepareLayout(bool &needMove, bool &needReparent)
 
     if (m_layoutBase == nullptr) {
         const bool useSplitter = m_layoutType == LayoutInfo::HSplitter || m_layoutType == LayoutInfo::VSplitter;
-        const QString baseWidgetClassName = useSplitter ? QLatin1String("QSplitter") : QLatin1String("QLayoutWidget");
+        const QString baseWidgetClassName = useSplitter ? u"QSplitter"_s : u"QLayoutWidget"_s;
         m_layoutBase = widgetFactory->createWidget(baseWidgetClassName, widgetFactory->containerOfWidget(m_parentWidget));
         if (useSplitter) {
             m_layoutBase->setObjectName(u"splitter"_s);
diff --git a/src/designer/src/lib/shared/plugindialog.cpp b/src/designer/src/lib/shared/plugindialog.cpp
index 9b954802f..c3f2093d1 100644
--- a/src/designer/src/lib/shared/plugindialog.cpp
+++ b/src/designer/src/lib/shared/plugindialog.cpp
@@ -108,9 +108,9 @@ void PluginDialog::populateTreeWidget()
         const QFont boldFont = topLevelItem->font(0);
         for (const QString &plugin : notLoadedPlugins) {
             const QString failureReason = pluginManager->failureReason(plugin);
-            const QString htmlFailureReason = QLatin1String("<html><head/><body><p>")
+            const QString htmlFailureReason = "<html><head/><body><p>"_L1
                 + failureReason.toHtmlEscaped()
-                + QLatin1String("</p></body></html>");
+                + "</p></body></html>"_L1;
             QTreeWidgetItem *pluginItem = setPluginItem(topLevelItem, QFileInfo(plugin), boldFont);
             auto errorItem = setItem(pluginItem, failureReason,
                                      htmlFailureReason, QString(), QIcon());
diff --git a/src/designer/src/lib/shared/qdesigner_dockwidget.cpp b/src/designer/src/lib/shared/qdesigner_dockwidget.cpp
index f2ced0dee..9b857efff 100644
--- a/src/designer/src/lib/shared/qdesigner_dockwidget.cpp
+++ b/src/designer/src/lib/shared/qdesigner_dockwidget.cpp
@@ -17,12 +17,14 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 bool QDockWidgetPropertySheet::isEnabled(int index) const
 {
     const QString &name = propertyName(index);
-    if (name == QLatin1String("dockWidgetArea"))
+    if (name == "dockWidgetArea"_L1)
         return static_cast<const QDesignerDockWidget *>(object())->docked();
-    if (name == QLatin1String("docked"))
+    if (name == "docked"_L1)
         return static_cast<const QDesignerDockWidget *>(object())->inMainWindow();
     return QDesignerPropertySheet::isEnabled(index);
 }
diff --git a/src/designer/src/lib/shared/qdesigner_utils.cpp b/src/designer/src/lib/shared/qdesigner_utils.cpp
index f2e2372ff..ec278645c 100644
--- a/src/designer/src/lib/shared/qdesigner_utils.cpp
+++ b/src/designer/src/lib/shared/qdesigner_utils.cpp
@@ -719,7 +719,7 @@ namespace qdesigner_internal
         case UicLanguage::Cpp:
             break;
         case UicLanguage::Python:
-            arguments << QLatin1String("-g") << QLatin1String("python");
+            arguments << u"-g"_s << u"python"_s;
             break;
         }
         arguments << fileName;
diff --git a/src/designer/src/lib/shared/widgetdatabase.cpp b/src/designer/src/lib/shared/widgetdatabase.cpp
index c09b634ed..6f1453376 100644
--- a/src/designer/src/lib/shared/widgetdatabase.cpp
+++ b/src/designer/src/lib/shared/widgetdatabase.cpp
@@ -626,11 +626,11 @@ static QString generateNewFormXML(const QString &className, const QString &simil
         << NewFormWidth << "</width><height>" << NewFormHeight << "</height></rect></property>"
         << R"(<property name="windowTitle"><string>)" << name << "</string></property>\n";
 
-    if (similarClassName == QLatin1String("QMainWindow")) {
+    if (similarClassName == "QMainWindow"_L1) {
         str << R"(<widget class="QWidget" name="centralwidget"/>)";
-    } else if (similarClassName == QLatin1String("QWizard")) {
+    } else if (similarClassName == "QWizard"_L1) {
         str << R"(<widget class="QWizardPage" name="wizardPage1"/><widget class="QWizardPage" name="wizardPage2"/>)";
-    } else if (similarClassName == QLatin1String("QDockWidget")) {
+    } else if (similarClassName == "QDockWidget"_L1) {
         str << R"(<widget class="QWidget" name="dockWidgetContents"/>)";
     }
     str << "</widget></ui>\n";
diff --git a/src/designer/src/lib/uilib/abstractformbuilder.cpp b/src/designer/src/lib/uilib/abstractformbuilder.cpp
index 021ea4cbe..560d8d6ce 100644
--- a/src/designer/src/lib/uilib/abstractformbuilder.cpp
+++ b/src/designer/src/lib/uilib/abstractformbuilder.cpp
@@ -874,8 +874,8 @@ void QAbstractFormBuilder::applyProperties(QObject *o, const QList<DomProperty*>
         const QVariant v = toVariant(o->metaObject(), p);
         if (!v.isNull()) {
             QString attributeName = p->attributeName();
-            if (attributeName == QLatin1String("numDigits") && o->inherits("QLCDNumber")) // Deprecated in Qt 4, removed in Qt 5.
-                attributeName = QLatin1String("digitCount");
+            if (attributeName == "numDigits"_L1 && o->inherits("QLCDNumber")) // Deprecated in Qt 4, removed in Qt 5.
+                attributeName = u"digitCount"_s;
             if (!d->applyPropertyInternally(o, attributeName, v))
                 o->setProperty(attributeName.toUtf8(), v);
         }
@@ -1889,6 +1889,18 @@ static const QLatin1StringView tableHeaderPrefixes[] = {
     "verticalHeader"_L1,
 };
 
+static constexpr QLatin1StringView itemViewHeaderRealPropertyNames[] =
+{
+    // Special handling for qtableview/qtreeview fake header attributes
+    "visible"_L1,
+    "cascadingSectionResizes"_L1,
+    "minimumSectionSize"_L1,    // before defaultSectionSize
+    "defaultSectionSize"_L1,
+    "highlightSections"_L1,
+    "showSortIndicator"_L1,
+    "stretchLastSection"_L1
+};
+
 /*!
     \internal
     \since 4.5
@@ -1896,24 +1908,11 @@ static const QLatin1StringView tableHeaderPrefixes[] = {
 void QAbstractFormBuilder::saveItemViewExtraInfo(const QAbstractItemView *itemView,
                                                  DomWidget *ui_widget, DomWidget *)
 {
-    //
-    // Special handling for qtableview/qtreeview fake header attributes
-    //
-    static const QLatin1String realPropertyNames[] = {
-        QLatin1String("visible"),
-        QLatin1String("cascadingSectionResizes"),
-        QLatin1String("minimumSectionSize"),    // before defaultSectionSize
-        QLatin1String("defaultSectionSize"),
-        QLatin1String("highlightSections"),
-        QLatin1String("showSortIndicator"),
-        QLatin1String("stretchLastSection"),
-    };
-
     if (const QTreeView *treeView = qobject_cast<const QTreeView*>(itemView)) {
         auto viewProperties = ui_widget->elementAttribute();
         const auto &headerProperties = computeProperties(treeView->header());
-        for (QString realPropertyName : realPropertyNames) {
-            const QString upperPropertyName = realPropertyName.at(0).toUpper()
+        for (const QLatin1StringView realPropertyName : itemViewHeaderRealPropertyNames) {
+            const QString upperPropertyName = QChar(realPropertyName.at(0)).toUpper()
                                               + realPropertyName.mid(1);
             const QString fakePropertyName = "header"_L1 + upperPropertyName;
             for (DomProperty *property : headerProperties) {
@@ -1930,8 +1929,8 @@ void QAbstractFormBuilder::saveItemViewExtraInfo(const QAbstractItemView *itemVi
             const auto &headerProperties = headerPrefix == "horizontalHeader"_L1
                 ? computeProperties(tableView->horizontalHeader())
                 : computeProperties(tableView->verticalHeader());
-            for (QString realPropertyName : realPropertyNames) {
-                const QString upperPropertyName = realPropertyName.at(0).toUpper()
+            for (const QLatin1StringView realPropertyName : itemViewHeaderRealPropertyNames) {
+                const QString upperPropertyName = QChar(realPropertyName.at(0)).toUpper()
                                                   + realPropertyName.mid(1);
                 const QString fakePropertyName = headerPrefix + upperPropertyName;
                 for (DomProperty *property : std::as_const(headerProperties)) {
@@ -2270,24 +2269,11 @@ void QAbstractFormBuilder::loadButtonExtraInfo(const DomWidget *ui_widget, QAbst
 void QAbstractFormBuilder::loadItemViewExtraInfo(DomWidget *ui_widget, QAbstractItemView *itemView,
                                                  QWidget *)
 {
-    //
-    // Special handling for qtableview/qtreeview fake header attributes
-    //
-    static const QLatin1String realPropertyNames[] = {
-        QLatin1String("visible"),
-        QLatin1String("cascadingSectionResizes"),
-        QLatin1String("minimumSectionSize"),    // before defaultSectionSize
-        QLatin1String("defaultSectionSize"),
-        QLatin1String("highlightSections"),
-        QLatin1String("showSortIndicator"),
-        QLatin1String("stretchLastSection"),
-    };
-
     if (QTreeView *treeView = qobject_cast<QTreeView*>(itemView)) {
         const auto &allAttributes = ui_widget->elementAttribute();
         QList<DomProperty *> headerProperties;
-        for (QString realPropertyName : realPropertyNames) {
-            const QString upperPropertyName = realPropertyName.at(0).toUpper()
+        for (QLatin1StringView realPropertyName : itemViewHeaderRealPropertyNames) {
+            const QString upperPropertyName = QChar(realPropertyName.at(0)).toUpper()
                                               + realPropertyName.mid(1);
             const QString fakePropertyName = "header"_L1 + upperPropertyName;
             for (DomProperty *attr : allAttributes) {
@@ -2302,8 +2288,8 @@ void QAbstractFormBuilder::loadItemViewExtraInfo(DomWidget *ui_widget, QAbstract
         const auto &allAttributes = ui_widget->elementAttribute();
         for (QLatin1StringView headerPrefix : tableHeaderPrefixes) {
             QList<DomProperty*> headerProperties;
-            for (QString realPropertyName : realPropertyNames) {
-                const QString upperPropertyName = realPropertyName.at(0).toUpper()
+            for (QLatin1StringView realPropertyName : itemViewHeaderRealPropertyNames) {
+                const QString upperPropertyName = QChar(realPropertyName.at(0)).toUpper()
                                                   + realPropertyName.mid(1);
                 const QString fakePropertyName = headerPrefix + upperPropertyName;
                 for (DomProperty *attr : allAttributes) {
diff --git a/src/designer/src/plugins/activeqt/qaxwidgetpropertysheet.cpp b/src/designer/src/plugins/activeqt/qaxwidgetpropertysheet.cpp
index 53cbd69c4..9c75af8b0 100644
--- a/src/designer/src/plugins/activeqt/qaxwidgetpropertysheet.cpp
+++ b/src/designer/src/plugins/activeqt/qaxwidgetpropertysheet.cpp
@@ -50,7 +50,7 @@ bool QAxWidgetPropertySheet::isEnabled(int index) const
 bool QAxWidgetPropertySheet::isVisible(int index) const
 {
     // classContext is ulong, which the property editor does not support
-    return propertyName(index) != QLatin1String("classContext");
+    return propertyName(index) != "classContext"_L1;
 }
 
 bool QAxWidgetPropertySheet::dynamicPropertiesAllowed() const