From bada65edc3f3b69953d7dcf427b23e283f583519 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Benjamin=20Br=C3=A6strup=20Sayoc?= <benj5378@outlook.com>
Date: Sun, 9 Feb 2025 18:02:40 +0100
Subject: [PATCH] Part: Use QStringLiteral

---
 src/Mod/Part/Gui/AppPartGui.cpp           |  8 +--
 src/Mod/Part/Gui/AttacherTexts.cpp        |  2 +-
 src/Mod/Part/Gui/Command.cpp              | 40 ++++++------
 src/Mod/Part/Gui/CommandFilter.cpp        |  8 +--
 src/Mod/Part/Gui/CommandParametric.cpp    | 14 ++---
 src/Mod/Part/Gui/CrossSections.cpp        |  6 +-
 src/Mod/Part/Gui/DlgExportStep.cpp        |  2 +-
 src/Mod/Part/Gui/DlgExtrusion.cpp         | 16 ++---
 src/Mod/Part/Gui/DlgFilletEdges.cpp       | 18 +++---
 src/Mod/Part/Gui/DlgPartImportIgesImp.cpp |  2 +-
 src/Mod/Part/Gui/DlgPartImportStepImp.cpp |  2 +-
 src/Mod/Part/Gui/DlgPrimitives.cpp        | 76 +++++++++++------------
 src/Mod/Part/Gui/DlgRevolution.cpp        | 22 +++----
 src/Mod/Part/Gui/DlgScale.cpp             |  6 +-
 src/Mod/Part/Gui/DlgSettingsGeneral.cpp   |  2 +-
 src/Mod/Part/Gui/Mirroring.cpp            |  4 +-
 src/Mod/Part/Gui/SectionCutting.cpp       | 16 ++---
 src/Mod/Part/Gui/TaskAttacher.cpp         | 26 ++++----
 src/Mod/Part/Gui/TaskCheckGeometry.cpp    |  2 +-
 src/Mod/Part/Gui/TaskFaceAppearances.cpp  |  6 +-
 src/Mod/Part/Gui/TaskLoft.cpp             | 14 ++---
 src/Mod/Part/Gui/TaskShapeBuilder.cpp     | 20 +++---
 src/Mod/Part/Gui/TaskSweep.cpp            | 10 +--
 23 files changed, 161 insertions(+), 161 deletions(-)

diff --git a/src/Mod/Part/Gui/AppPartGui.cpp b/src/Mod/Part/Gui/AppPartGui.cpp
index 04b50bdedf..dbf14a999a 100644
--- a/src/Mod/Part/Gui/AppPartGui.cpp
+++ b/src/Mod/Part/Gui/AppPartGui.cpp
@@ -135,10 +135,10 @@ PyMOD_INIT_FUNC(PartGui)
 
     Base::Console().Log("Loading GUI of Part module... done\n");
 
-    Gui::BitmapFactory().addPath(QString::fromLatin1(":/icons/booleans"));
-    Gui::BitmapFactory().addPath(QString::fromLatin1(":/icons/create"));
-    Gui::BitmapFactory().addPath(QString::fromLatin1(":/icons/parametric"));
-    Gui::BitmapFactory().addPath(QString::fromLatin1(":/icons/tools"));
+    Gui::BitmapFactory().addPath(QStringLiteral(":/icons/booleans"));
+    Gui::BitmapFactory().addPath(QStringLiteral(":/icons/create"));
+    Gui::BitmapFactory().addPath(QStringLiteral(":/icons/parametric"));
+    Gui::BitmapFactory().addPath(QStringLiteral(":/icons/tools"));
 
     // clang-format off
     static struct PyModuleDef pAttachEngineTextsModuleDef = {
diff --git a/src/Mod/Part/Gui/AttacherTexts.cpp b/src/Mod/Part/Gui/AttacherTexts.cpp
index 38ae2b8efd..58f329f3ca 100644
--- a/src/Mod/Part/Gui/AttacherTexts.cpp
+++ b/src/Mod/Part/Gui/AttacherTexts.cpp
@@ -369,7 +369,7 @@ QStringList getRefListForMode(AttachEngine &attacher, eMapMode mmode)
         for(eRefType rt : rts){
             buf.append(getShapeTypeText(rt));
         }
-        strlist.append(buf.join(QString::fromLatin1(", ")));
+        strlist.append(buf.join(QStringLiteral(", ")));
     }
     return strlist;
 }
diff --git a/src/Mod/Part/Gui/Command.cpp b/src/Mod/Part/Gui/Command.cpp
index 51bd377ad2..cf1ad10396 100644
--- a/src/Mod/Part/Gui/Command.cpp
+++ b/src/Mod/Part/Gui/Command.cpp
@@ -940,11 +940,11 @@ void CmdPartImport::activated(int iMsg)
 {
     Q_UNUSED(iMsg);
     QStringList filter;
-    filter << QString::fromLatin1("STEP (*.stp *.step)");
-    filter << QString::fromLatin1("STEP with colors (*.stp *.step)");
-    filter << QString::fromLatin1("IGES (*.igs *.iges)");
-    filter << QString::fromLatin1("IGES with colors (*.igs *.iges)");
-    filter << QString::fromLatin1("BREP (*.brp *.brep)");
+    filter << QStringLiteral("STEP (*.stp *.step)");
+    filter << QStringLiteral("STEP with colors (*.stp *.step)");
+    filter << QStringLiteral("IGES (*.igs *.iges)");
+    filter << QStringLiteral("IGES with colors (*.igs *.iges)");
+    filter << QStringLiteral("BREP (*.brp *.brep)");
 
     QString select;
     QString fn = Gui::FileDialog::getOpenFileName(Gui::getMainWindow(), QString(), QString(), filter.join(QLatin1String(";;")), &select);
@@ -1003,11 +1003,11 @@ void CmdPartExport::activated(int iMsg)
 {
     Q_UNUSED(iMsg);
     QStringList filter;
-    filter << QString::fromLatin1("STEP (*.stp *.step)");
-    filter << QString::fromLatin1("STEP with colors (*.stp *.step)");
-    filter << QString::fromLatin1("IGES (*.igs *.iges)");
-    filter << QString::fromLatin1("IGES with colors (*.igs *.iges)");
-    filter << QString::fromLatin1("BREP (*.brp *.brep)");
+    filter << QStringLiteral("STEP (*.stp *.step)");
+    filter << QStringLiteral("STEP with colors (*.stp *.step)");
+    filter << QStringLiteral("IGES (*.igs *.iges)");
+    filter << QStringLiteral("IGES with colors (*.igs *.iges)");
+    filter << QStringLiteral("BREP (*.brp *.brep)");
 
     QString select;
     QString fn = Gui::FileDialog::getSaveFileName(Gui::getMainWindow(), QString(), QString(), filter.join(QLatin1String(";;")), &select);
@@ -1051,12 +1051,12 @@ void CmdPartImportCurveNet::activated(int iMsg)
 {
     Q_UNUSED(iMsg);
     QStringList filter;
-    filter << QString::fromLatin1("%1 (*.stp *.step *.igs *.iges *.brp *.brep)")
+    filter << QStringLiteral("%1 (*.stp *.step *.igs *.iges *.brp *.brep)")
                  .arg(QObject::tr("All CAD Files"));
-    filter << QString::fromLatin1("STEP (*.stp *.step)");
-    filter << QString::fromLatin1("IGES (*.igs *.iges)");
-    filter << QString::fromLatin1("BREP (*.brp *.brep)");
-    filter << QString::fromLatin1("%1 (*.*)")
+    filter << QStringLiteral("STEP (*.stp *.step)");
+    filter << QStringLiteral("IGES (*.igs *.iges)");
+    filter << QStringLiteral("BREP (*.brp *.brep)");
+    filter << QStringLiteral("%1 (*.*)")
                  .arg(QObject::tr("All Files"));
 
     QString fn = Gui::FileDialog::getOpenFileName(Gui::getMainWindow(), QString(), QString(), filter.join(QLatin1String(";;")));
@@ -1111,7 +1111,7 @@ void CmdPartMakeSolid::activated(int iMsg)
                     it->Label.getValue());
             }
             else if (type == TopAbs_COMPOUND || type == TopAbs_COMPSOLID) {
-                str = QString::fromLatin1(
+                str = QStringLiteral(
                     "__s__=App.ActiveDocument.%1.Shape.Faces\n"
                     "__s__=Part.Solid(Part.Shell(__s__))\n"
                     "__o__=App.ActiveDocument.addObject(\"Part::Feature\",\"%1_solid\")\n"
@@ -1123,7 +1123,7 @@ void CmdPartMakeSolid::activated(int iMsg)
                          QLatin1String(it->Label.getValue()));
             }
             else if (type == TopAbs_SHELL) {
-                str = QString::fromLatin1(
+                str = QStringLiteral(
                     "__s__=App.ActiveDocument.%1.Shape\n"
                     "__s__=Part.Solid(__s__)\n"
                     "__o__=App.ActiveDocument.addObject(\"Part::Feature\",\"%1_solid\")\n"
@@ -1186,7 +1186,7 @@ void CmdPartReverseShape::activated(int iMsg)
             name += "_rev";
             name = getUniqueObjectName(name.c_str());
 
-            QString str = QString::fromLatin1(
+            QString str = QStringLiteral(
                 "__o__=App.ActiveDocument.addObject(\"Part::Reverse\",\"%1\")\n"
                 "__o__.Source=App.ActiveDocument.%2\n"
                 "__o__.Label=\"%3 (Rev)\"\n"
@@ -2222,10 +2222,10 @@ namespace {
 
         if (activeObj) {
             QString activeName = QString::fromLatin1(activeObj->getNameInDocument());
-            return QString::fromLatin1("App.ActiveDocument.getObject('%1\').addObject(obj)\n").arg(activeName);
+            return QStringLiteral("App.ActiveDocument.getObject('%1\').addObject(obj)\n").arg(activeName);
         }
 
-        return QString::fromLatin1("# Object created at document root.");
+        return QStringLiteral("# Object created at document root.");
     }
 }
 
diff --git a/src/Mod/Part/Gui/CommandFilter.cpp b/src/Mod/Part/Gui/CommandFilter.cpp
index c27f01f571..db86926623 100644
--- a/src/Mod/Part/Gui/CommandFilter.cpp
+++ b/src/Mod/Part/Gui/CommandFilter.cpp
@@ -87,16 +87,16 @@ Gui::Action * PartCmdSelectFilter::createAction()
 
     QAction* cmd0 = pcAction->addAction(QString());
     cmd0->setIcon(Gui::BitmapFactory().iconFromTheme("vertex-selection"));
-    cmd0->setShortcut(QKeySequence(QString::fromUtf8("X,S")));
+    cmd0->setShortcut(QKeySequence(QStringLiteral("X,S")));
     QAction* cmd1 = pcAction->addAction(QString());
     cmd1->setIcon(Gui::BitmapFactory().iconFromTheme("edge-selection"));
-    cmd1->setShortcut(QKeySequence(QString::fromUtf8("E,S")));
+    cmd1->setShortcut(QKeySequence(QStringLiteral("E,S")));
     QAction* cmd2 = pcAction->addAction(QString());
     cmd2->setIcon(Gui::BitmapFactory().iconFromTheme("face-selection"));
-    cmd2->setShortcut(QKeySequence(QString::fromUtf8("F,S")));
+    cmd2->setShortcut(QKeySequence(QStringLiteral("F,S")));
     QAction* cmd3 = pcAction->addAction(QString());
     cmd3->setIcon(Gui::BitmapFactory().iconFromTheme("clear-selection"));
-    cmd3->setShortcut(QKeySequence(QString::fromUtf8("C,S")));
+    cmd3->setShortcut(QKeySequence(QStringLiteral("C,S")));
 
     _pcAction = pcAction;
     languageChange();
diff --git a/src/Mod/Part/Gui/CommandParametric.cpp b/src/Mod/Part/Gui/CommandParametric.cpp
index 262f611597..3fd5e4aa68 100644
--- a/src/Mod/Part/Gui/CommandParametric.cpp
+++ b/src/Mod/Part/Gui/CommandParametric.cpp
@@ -44,11 +44,11 @@ QString getAutoGroupCommandStr()
     App::Part* activePart = Gui::Application::Instance->activeView()->getActiveObject<App::Part*>("part");
     if (activePart) {
         QString activePartName = QString::fromLatin1(activePart->getNameInDocument());
-        return QString::fromLatin1("App.ActiveDocument.getObject('%1\')."
+        return QStringLiteral("App.ActiveDocument.getObject('%1\')."
             "addObject(App.ActiveDocument.ActiveObject)\n")
             .arg(activePartName);
     }
-    return QString::fromLatin1("# Object created at document root.");
+    return QStringLiteral("# Object created at document root.");
 }
 }
 
@@ -77,7 +77,7 @@ void CmdPartCylinder::activated(int iMsg)
     openCommand((const char*)cmd.toUtf8());
 
     runCommand(Doc,"App.ActiveDocument.addObject(\"Part::Cylinder\",\"Cylinder\")");
-    cmd = QString::fromLatin1("App.ActiveDocument.ActiveObject.Label = \"%1\"")
+    cmd = QStringLiteral("App.ActiveDocument.ActiveObject.Label = \"%1\"")
         .arg(qApp->translate("CmdPartCylinder","Cylinder"));
     runCommand(Doc,cmd.toUtf8());
     runCommand(Doc, getAutoGroupCommandStr().toUtf8());
@@ -119,7 +119,7 @@ void CmdPartBox::activated(int iMsg)
     openCommand((const char*)cmd.toUtf8());
 
     runCommand(Doc,"App.ActiveDocument.addObject(\"Part::Box\",\"Box\")");
-    cmd = QString::fromLatin1("App.ActiveDocument.ActiveObject.Label = \"%1\"")
+    cmd = QStringLiteral("App.ActiveDocument.ActiveObject.Label = \"%1\"")
         .arg(qApp->translate("CmdPartBox","Cube"));
     runCommand(Doc,cmd.toUtf8());
     runCommand(Doc, getAutoGroupCommandStr().toUtf8());
@@ -161,7 +161,7 @@ void CmdPartSphere::activated(int iMsg)
     openCommand((const char*)cmd.toUtf8());
 
     runCommand(Doc,"App.ActiveDocument.addObject(\"Part::Sphere\",\"Sphere\")");
-    cmd = QString::fromLatin1("App.ActiveDocument.ActiveObject.Label = \"%1\"")
+    cmd = QStringLiteral("App.ActiveDocument.ActiveObject.Label = \"%1\"")
         .arg(qApp->translate("CmdPartSphere","Sphere"));
     runCommand(Doc,cmd.toUtf8());
     runCommand(Doc, getAutoGroupCommandStr().toUtf8());
@@ -203,7 +203,7 @@ void CmdPartCone::activated(int iMsg)
     openCommand((const char*)cmd.toUtf8());
 
     runCommand(Doc,"App.ActiveDocument.addObject(\"Part::Cone\",\"Cone\")");
-    cmd = QString::fromLatin1("App.ActiveDocument.ActiveObject.Label = \"%1\"")
+    cmd = QStringLiteral("App.ActiveDocument.ActiveObject.Label = \"%1\"")
         .arg(qApp->translate("CmdPartCone","Cone"));
     runCommand(Doc,cmd.toUtf8());
     runCommand(Doc, getAutoGroupCommandStr().toUtf8());
@@ -245,7 +245,7 @@ void CmdPartTorus::activated(int iMsg)
     openCommand((const char*)cmd.toUtf8());
 
     runCommand(Doc,"App.ActiveDocument.addObject(\"Part::Torus\",\"Torus\")");
-    cmd = QString::fromLatin1("App.ActiveDocument.ActiveObject.Label = \"%1\"")
+    cmd = QStringLiteral("App.ActiveDocument.ActiveObject.Label = \"%1\"")
         .arg(qApp->translate("CmdPartTorus","Torus"));
     runCommand(Doc,cmd.toUtf8());
     runCommand(Doc, getAutoGroupCommandStr().toUtf8());
diff --git a/src/Mod/Part/Gui/CrossSections.cpp b/src/Mod/Part/Gui/CrossSections.cpp
index 5e34e4f09d..bafda31ba0 100644
--- a/src/Mod/Part/Gui/CrossSections.cpp
+++ b/src/Mod/Part/Gui/CrossSections.cpp
@@ -273,21 +273,21 @@ void CrossSections::apply()
         App::Document* doc = it->getDocument();
         std::string s = it->getNameInDocument();
         s += "_cs";
-        Gui::Command::runCommand(Gui::Command::App, QString::fromLatin1(
+        Gui::Command::runCommand(Gui::Command::App, QStringLiteral(
             "wires=list()\n"
             "shape=FreeCAD.getDocument(\"%1\").%2.Shape\n")
             .arg(QLatin1String(doc->getName()),
                  QLatin1String(it->getNameInDocument())).toLatin1());
 
         for (double jt : d) {
-            Gui::Command::runCommand(Gui::Command::App, QString::fromLatin1(
+            Gui::Command::runCommand(Gui::Command::App, QStringLiteral(
                 "for i in shape.slice(Base.Vector(%1,%2,%3),%4):\n"
                 "    wires.append(i)\n"
                 ).arg(a).arg(b).arg(c).arg(jt).toLatin1());
             seq.next();
         }
 
-        Gui::Command::runCommand(Gui::Command::App, QString::fromLatin1(
+        Gui::Command::runCommand(Gui::Command::App, QStringLiteral(
             "comp=Part.Compound(wires)\n"
             "slice=FreeCAD.getDocument(\"%1\").addObject(\"Part::Feature\",\"%2\")\n"
             "slice.Shape=comp\n"
diff --git a/src/Mod/Part/Gui/DlgExportStep.cpp b/src/Mod/Part/Gui/DlgExportStep.cpp
index ed4ecca4d9..8c9a47365b 100644
--- a/src/Mod/Part/Gui/DlgExportStep.cpp
+++ b/src/Mod/Part/Gui/DlgExportStep.cpp
@@ -146,7 +146,7 @@ DlgExportHeaderStep::DlgExportHeaderStep(QWidget* parent)
     ui->lineEditProduct->setReadOnly(true);
 
     QRegularExpression rx;
-    rx.setPattern(QString::fromLatin1("[\\x00-\\x7F]+"));
+    rx.setPattern(QStringLiteral("[\\x00-\\x7F]+"));
     QRegularExpressionValidator* companyValidator = new QRegularExpressionValidator(ui->lineEditCompany);
     companyValidator->setRegularExpression(rx);
     ui->lineEditCompany->setValidator(companyValidator);
diff --git a/src/Mod/Part/Gui/DlgExtrusion.cpp b/src/Mod/Part/Gui/DlgExtrusion.cpp
index 3f2f39aca7..4748d1e205 100644
--- a/src/Mod/Part/Gui/DlgExtrusion.cpp
+++ b/src/Mod/Part/Gui/DlgExtrusion.cpp
@@ -207,7 +207,7 @@ void DlgExtrusion::onSelectEdgeClicked()
 
         //visibility automation
         try{
-            QString code = QString::fromLatin1(
+            QString code = QStringLiteral(
                         "import Show\n"
                         "tv = Show.TempoVis(App.ActiveDocument, tag= 'PartGui::DlgExtrusion')\n"
                         "tv.hide([%1])"
@@ -217,9 +217,9 @@ void DlgExtrusion::onSelectEdgeClicked()
             for (App::DocumentObject* obj: sources){
                 if (!obj)
                     continue;
-                features_to_hide.append(QString::fromLatin1("App.ActiveDocument."));
+                features_to_hide.append(QStringLiteral("App.ActiveDocument."));
                 features_to_hide.append(QString::fromLatin1(obj->getNameInDocument()));
-                features_to_hide.append(QString::fromLatin1(", \n"));
+                features_to_hide.append(QStringLiteral(", \n"));
             }
             QByteArray code_2 = code.arg(features_to_hide).toLatin1();
             Base::Interpreter().runString(code_2.constData());
@@ -474,8 +474,8 @@ void DlgExtrusion::apply()
             name = sourceObj->getDocument()->getUniqueObjectName("Extrude").c_str();
             if (addBaseName) {
                 //FIXME: implement
-                //QString baseName = QString::fromLatin1("Extrude_%1").arg(sourceObjectName);
-                //label = QString::fromLatin1("%1_Extrude").arg((*it)->text(0));
+                //QString baseName = QStringLiteral("Extrude_%1").arg(sourceObjectName);
+                //label = QStringLiteral("%1_Extrude").arg((*it)->text(0));
             }
 
             FCMD_OBJ_DOC_CMD(sourceObj,"addObject('Part::Extrusion','" << name << "')");
@@ -505,7 +505,7 @@ void DlgExtrusion::apply()
     }
     catch(...) {
         QMessageBox::critical(this, windowTitle(),
-            tr("Creating Extrusion failed.\n%1").arg(QString::fromUtf8("Unknown error")));
+            tr("Creating Extrusion failed.\n%1").arg(QStringLiteral("Unknown error")));
         return;
     }
 }
@@ -604,7 +604,7 @@ void DlgExtrusion::setAxisLink(const char* objname, const char* subname)
     if(objname && strlen(objname) > 0){
         QString txt = QString::fromLatin1(objname);
         if (subname && strlen(subname) > 0){
-            txt = txt + QString::fromLatin1(":") + QString::fromLatin1(subname);
+            txt = txt + QStringLiteral(":") + QString::fromLatin1(subname);
         }
         ui->txtLink->setText(txt);
     } else {
@@ -677,7 +677,7 @@ bool DlgExtrusion::validate()
         } catch(Standard_Failure &err) {
             errmsg = QString::fromLocal8Bit(err.GetMessageString());
         } catch(...) {
-            errmsg = QString::fromUtf8("Unknown error");
+            errmsg = QStringLiteral("Unknown error");
         }
         if (errmsg.length() > 0){
             QMessageBox::critical(this, windowTitle(), tr("Can't determine normal vector of shape to be extruded. Please use other mode. \n\n(%1)").arg(errmsg));
diff --git a/src/Mod/Part/Gui/DlgFilletEdges.cpp b/src/Mod/Part/Gui/DlgFilletEdges.cpp
index aa26a17ee5..0dfeeb43aa 100644
--- a/src/Mod/Part/Gui/DlgFilletEdges.cpp
+++ b/src/Mod/Part/Gui/DlgFilletEdges.cpp
@@ -108,7 +108,7 @@ void FilletRadiusDelegate::setModelData(QWidget *editor, QAbstractItemModel *mod
     Gui::QuantitySpinBox *spinBox = static_cast<Gui::QuantitySpinBox*>(editor);
     spinBox->interpretText();
     //double value = spinBox->value();
-    //QString value = QString::fromLatin1("%1").arg(spinBox->value(),0,'f',2);
+    //QString value = QStringLiteral("%1").arg(spinBox->value(),0,'f',2);
     //QString value = QLocale().toString(spinBox->value().getValue(),'f',Base::UnitsApi::getDecimals());
     Base::Quantity value = spinBox->value();
 
@@ -437,7 +437,7 @@ void DlgFilletEdges::onSelectEdge(const QString& subelement, int type)
     QAbstractItemModel* model = ui->treeView->model();
     for (int i=0; i<model->rowCount(); ++i) {
         int id = model->data(model->index(i,0), Qt::UserRole).toInt();
-        QString name = QString::fromLatin1("Edge%1").arg(id);
+        QString name = QStringLiteral("Edge%1").arg(id);
         if (name == subelement) {
             // ok, check the selected sub-element
             Qt::CheckState checkState =
@@ -469,7 +469,7 @@ void DlgFilletEdges::onSelectEdgesOfFace(const QString& subelement, int type)
             for(int j = 1; j <= mapOfEdges.Extent(); ++j) {
                 TopoDS_Edge edge = TopoDS::Edge(mapOfEdges.FindKey(j));
                 int id = d->all_edges.FindIndex(edge);
-                QString name = QString::fromLatin1("Edge%1").arg(id);
+                QString name = QStringLiteral("Edge%1").arg(id);
                 onSelectEdge(name, type);
                 Gui::SelectionChanges::MsgType msgType = Gui::SelectionChanges::MsgType(type);
                 if (msgType == Gui::SelectionChanges::AddSelection) {
@@ -534,7 +534,7 @@ void DlgFilletEdges::toggleCheckState(const QModelIndex& index)
         return;
     QVariant check = index.data(Qt::CheckStateRole);
     int id = index.data(Qt::UserRole).toInt();
-    QString name = QString::fromLatin1("Edge%1").arg(id);
+    QString name = QStringLiteral("Edge%1").arg(id);
     Qt::CheckState checkState = static_cast<Qt::CheckState>(check.toInt());
 
     bool block = this->blockSelection(true);
@@ -973,7 +973,7 @@ bool DlgFilletEdges::accept()
     std::string fillet = getFilletType();
     int index = ui->shapeObject->currentIndex();
     shape = ui->shapeObject->itemData(index).toString();
-    type = QString::fromLatin1("Part::%1").arg(QString::fromLatin1(fillet.c_str()));
+    type = QStringLiteral("Part::%1").arg(QString::fromLatin1(fillet.c_str()));
 
     if (d->fillet)
         name = QString::fromLatin1(d->fillet->getNameInDocument());
@@ -983,12 +983,12 @@ bool DlgFilletEdges::accept()
     activeDoc->openTransaction(fillet.c_str());
     QString code;
     if (!d->fillet) {
-        code = QString::fromLatin1(
+        code = QStringLiteral(
         "FreeCAD.ActiveDocument.addObject(\"%1\",\"%2\")\n"
         "FreeCAD.ActiveDocument.%2.Base = FreeCAD.ActiveDocument.%3\n")
         .arg(type, name, shape);
     }
-    code += QString::fromLatin1("__fillets__ = []\n");
+    code += QStringLiteral("__fillets__ = []\n");
     for (int i=0; i<model->rowCount(); ++i) {
         QVariant value = model->index(i,0).data(Qt::CheckStateRole);
         Qt::CheckState checkState = static_cast<Qt::CheckState>(value.toInt());
@@ -1001,7 +1001,7 @@ bool DlgFilletEdges::accept()
             Base::Quantity r2 = r1;
             if (end_radius)
                 r2 = model->index(i,2).data(Qt::EditRole).value<Base::Quantity>();
-            code += QString::fromLatin1(
+            code += QStringLiteral(
                 "__fillets__.append((%1,%2,%3))\n")
                 .arg(id)
                 .arg(r1.getValue(),0,'f',Base::UnitsApi::getDecimals())
@@ -1018,7 +1018,7 @@ bool DlgFilletEdges::accept()
     }
 
     Gui::WaitCursor wc;
-    code += QString::fromLatin1(
+    code += QStringLiteral(
         "FreeCAD.ActiveDocument.%1.Edges = __fillets__\n"
         "del __fillets__\n"
         "FreeCADGui.ActiveDocument.%2.Visibility = False\n")
diff --git a/src/Mod/Part/Gui/DlgPartImportIgesImp.cpp b/src/Mod/Part/Gui/DlgPartImportIgesImp.cpp
index 6b893b6c20..355c22eb9a 100644
--- a/src/Mod/Part/Gui/DlgPartImportIgesImp.cpp
+++ b/src/Mod/Part/Gui/DlgPartImportIgesImp.cpp
@@ -63,7 +63,7 @@ void DlgPartImportIgesImp::OnApply()
 void DlgPartImportIgesImp::onChooseFileName()
 {
     QString fn = Gui::FileDialog::getOpenFileName(Gui::getMainWindow(), QString(), QString(),
-        QString::fromLatin1("%1 (*.igs *.iges);;%2 (*.*)"))
+        QStringLiteral("%1 (*.igs *.iges);;%2 (*.*)"))
         .arg(tr("IGES"),
              tr("All Files"));
     if (!fn.isEmpty()) {
diff --git a/src/Mod/Part/Gui/DlgPartImportStepImp.cpp b/src/Mod/Part/Gui/DlgPartImportStepImp.cpp
index 9bde68b8aa..8324949dbd 100644
--- a/src/Mod/Part/Gui/DlgPartImportStepImp.cpp
+++ b/src/Mod/Part/Gui/DlgPartImportStepImp.cpp
@@ -63,7 +63,7 @@ void DlgPartImportStepImp::OnApply()
 void DlgPartImportStepImp::onChooseFileName()
 {
     QString fn = Gui::FileDialog::getOpenFileName(Gui::getMainWindow(), QString(), QString(),
-        QString::fromLatin1("%1 (*.stp *.step);;%2 (*.*)"))
+        QStringLiteral("%1 (*.stp *.step);;%2 (*.*)"))
         .arg(QLatin1String("STEP"),
              tr("All Files"));
     if (!fn.isEmpty()) {
diff --git a/src/Mod/Part/Gui/DlgPrimitives.cpp b/src/Mod/Part/Gui/DlgPrimitives.cpp
index 28e537426d..a23d89f404 100644
--- a/src/Mod/Part/Gui/DlgPrimitives.cpp
+++ b/src/Mod/Part/Gui/DlgPrimitives.cpp
@@ -67,11 +67,11 @@ namespace PartGui {
         App::Part* activePart = Gui::Application::Instance->activeView()->getActiveObject<App::Part*>("part");
         if (activePart) {
             QString activeObjectName = QString::fromLatin1(activePart->getNameInDocument());
-            return QString::fromLatin1("App.ActiveDocument.getObject('%1\')."
+            return QStringLiteral("App.ActiveDocument.getObject('%1\')."
                 "addObject(App.ActiveDocument.getObject('%2\'))\n")
                 .arg(activeObjectName, objectName);
         }
-        return QString::fromLatin1("# Object %1 created at document root").arg(objectName);
+        return QStringLiteral("# Object %1 created at document root").arg(objectName);
     }
 
 const char* gce_ErrorStatusText(gce_ErrorType et)
@@ -151,7 +151,7 @@ QString Picker::toPlacement(const gp_Ax2& axis) const
     Base::Rotation rot(Base::convertTo<Base::Vector3d>(theAxis), theAngle);
     gp_Pnt loc = axis.Location();
 
-    return QString::fromLatin1("Base.Placement(Base.Vector(%1,%2,%3),Base.Rotation(%4,%5,%6,%7))")
+    return QStringLiteral("Base.Placement(Base.Vector(%1,%2,%3),Base.Rotation(%4,%5,%6,%7))")
         .arg(loc.X(),0,'g',Base::UnitsApi::getDecimals())
         .arg(loc.Y(),0,'g',Base::UnitsApi::getDecimals())
         .arg(loc.Z(),0,'g',Base::UnitsApi::getDecimals())
@@ -182,7 +182,7 @@ public:
         Handle(Geom_Circle) circle = Handle(Geom_Circle)::DownCast(trim->BasisCurve());
 
         QString name = QString::fromLatin1(doc->getUniqueObjectName("Circle").c_str());
-        return QString::fromLatin1(
+        return QStringLiteral(
             "App.ActiveDocument.addObject(\"Part::Circle\",\"%1\")\n"
             "App.ActiveDocument.%1.Radius=%2\n"
             "App.ActiveDocument.%1.Angle1=%3\n"
@@ -266,7 +266,7 @@ const char* PlanePrimitive::getDefaultName() const
 
 QString PlanePrimitive::create(const QString& objectName, const QString& placement) const
 {
-    return QString::fromLatin1(
+    return QStringLiteral(
         "App.ActiveDocument.addObject(\"Part::Plane\",\"%1\")\n"
         "App.ActiveDocument.%1.Length='%2'\n"
         "App.ActiveDocument.%1.Width='%3'\n"
@@ -281,7 +281,7 @@ QString PlanePrimitive::create(const QString& objectName, const QString& placeme
 
 QString PlanePrimitive::change(const QString& objectName, const QString& placement) const
 {
-    return QString::fromLatin1(
+    return QStringLiteral(
         "%1.Length='%2'\n"
         "%1.Width='%3'\n"
         "%1.Placement=%4\n")
@@ -339,7 +339,7 @@ const char* BoxPrimitive::getDefaultName() const
 
 QString BoxPrimitive::create(const QString& objectName, const QString& placement) const
 {
-    return QString::fromLatin1(
+    return QStringLiteral(
         "App.ActiveDocument.addObject(\"Part::Box\",\"%1\")\n"
         "App.ActiveDocument.%1.Length='%2'\n"
         "App.ActiveDocument.%1.Width='%3'\n"
@@ -356,7 +356,7 @@ QString BoxPrimitive::create(const QString& objectName, const QString& placement
 
 QString BoxPrimitive::change(const QString& objectName, const QString& placement) const
 {
-    return QString::fromLatin1(
+    return QStringLiteral(
         "%1.Length='%2'\n"
         "%1.Width='%3'\n"
         "%1.Height='%4'\n"
@@ -425,7 +425,7 @@ const char* CylinderPrimitive::getDefaultName() const
 
 QString CylinderPrimitive::create(const QString& objectName, const QString& placement) const
 {
-    return QString::fromLatin1(
+    return QStringLiteral(
         "App.ActiveDocument.addObject(\"Part::Cylinder\",\"%1\")\n"
         "App.ActiveDocument.%1.Radius='%2'\n"
         "App.ActiveDocument.%1.Height='%3'\n"
@@ -446,7 +446,7 @@ QString CylinderPrimitive::create(const QString& objectName, const QString& plac
 
 QString CylinderPrimitive::change(const QString& objectName, const QString& placement) const
 {
-    return QString::fromLatin1(
+    return QStringLiteral(
         "%1.Radius='%2'\n"
         "%1.Height='%3'\n"
         "%1.Angle='%4'\n"
@@ -523,7 +523,7 @@ const char* ConePrimitive::getDefaultName() const
 
 QString ConePrimitive::create(const QString& objectName, const QString& placement) const
 {
-    return QString::fromLatin1(
+    return QStringLiteral(
         "App.ActiveDocument.addObject(\"Part::Cone\",\"%1\")\n"
         "App.ActiveDocument.%1.Radius1='%2'\n"
         "App.ActiveDocument.%1.Radius2='%3'\n"
@@ -542,7 +542,7 @@ QString ConePrimitive::create(const QString& objectName, const QString& placemen
 
 QString ConePrimitive::change(const QString& objectName, const QString& placement) const
 {
-    return QString::fromLatin1(
+    return QStringLiteral(
         "%1.Radius1='%2'\n"
         "%1.Radius2='%3'\n"
         "%1.Height='%4'\n"
@@ -614,7 +614,7 @@ const char* SpherePrimitive::getDefaultName() const
 
 QString SpherePrimitive::create(const QString& objectName, const QString& placement) const
 {
-    return QString::fromLatin1(
+    return QStringLiteral(
         "App.ActiveDocument.addObject(\"Part::Sphere\",\"%1\")\n"
         "App.ActiveDocument.%1.Radius='%2'\n"
         "App.ActiveDocument.%1.Angle1='%3'\n"
@@ -633,7 +633,7 @@ QString SpherePrimitive::create(const QString& objectName, const QString& placem
 
 QString SpherePrimitive::change(const QString& objectName, const QString& placement) const
 {
-    return QString::fromLatin1(
+    return QStringLiteral(
         "%1.Radius='%2'\n"
         "%1.Angle1='%3'\n"
         "%1.Angle2='%4'\n"
@@ -714,7 +714,7 @@ const char* EllipsoidPrimitive::getDefaultName() const
 
 QString EllipsoidPrimitive::create(const QString& objectName, const QString& placement) const
 {
-    return QString::fromLatin1(
+    return QStringLiteral(
         "App.ActiveDocument.addObject(\"Part::Ellipsoid\",\"%1\")\n"
         "App.ActiveDocument.%1.Radius1='%2'\n"
         "App.ActiveDocument.%1.Radius2='%3'\n"
@@ -737,7 +737,7 @@ QString EllipsoidPrimitive::create(const QString& objectName, const QString& pla
 
 QString EllipsoidPrimitive::change(const QString& objectName, const QString& placement) const
 {
-    return QString::fromLatin1(
+    return QStringLiteral(
         "%1.Radius1='%2'\n"
         "%1.Radius2='%3'\n"
         "%1.Radius3='%4'\n"
@@ -823,7 +823,7 @@ const char* TorusPrimitive::getDefaultName() const
 
 QString TorusPrimitive::create(const QString& objectName, const QString& placement) const
 {
-    return QString::fromLatin1(
+    return QStringLiteral(
         "App.ActiveDocument.addObject(\"Part::Torus\",\"%1\")\n"
         "App.ActiveDocument.%1.Radius1='%2'\n"
         "App.ActiveDocument.%1.Radius2='%3'\n"
@@ -844,7 +844,7 @@ QString TorusPrimitive::create(const QString& objectName, const QString& placeme
 
 QString TorusPrimitive::change(const QString& objectName, const QString& placement) const
 {
-    return QString::fromLatin1(
+    return QStringLiteral(
         "%1.Radius1='%2'\n"
         "%1.Radius2='%3'\n"
         "%1.Angle1='%4'\n"
@@ -921,7 +921,7 @@ const char* PrismPrimitive::getDefaultName() const
 
 QString PrismPrimitive::create(const QString& objectName, const QString& placement) const
 {
-    return QString::fromLatin1(
+    return QStringLiteral(
         "App.ActiveDocument.addObject(\"Part::Prism\",\"%1\")\n"
         "App.ActiveDocument.%1.Polygon=%2\n"
         "App.ActiveDocument.%1.Circumradius='%3'\n"
@@ -942,7 +942,7 @@ QString PrismPrimitive::create(const QString& objectName, const QString& placeme
 
 QString PrismPrimitive::change(const QString& objectName, const QString& placement) const
 {
-    return QString::fromLatin1(
+    return QStringLiteral(
         "%1.Polygon=%2\n"
         "%1.Circumradius='%3'\n"
         "%1.Height='%4'\n"
@@ -1053,7 +1053,7 @@ const char* WedgePrimitive::getDefaultName() const
 
 QString WedgePrimitive::create(const QString& objectName, const QString& placement) const
 {
-    return QString::fromLatin1(
+    return QStringLiteral(
         "App.ActiveDocument.addObject(\"Part::Wedge\",\"%1\")\n"
         "App.ActiveDocument.%1.Xmin='%2'\n"
         "App.ActiveDocument.%1.Ymin='%3'\n"
@@ -1084,7 +1084,7 @@ QString WedgePrimitive::create(const QString& objectName, const QString& placeme
 
 QString WedgePrimitive::change(const QString& objectName, const QString& placement) const
 {
-    return QString::fromLatin1(
+    return QStringLiteral(
         "%1.Xmin='%2'\n"
         "%1.Ymin='%3'\n"
         "%1.Zmin='%4'\n"
@@ -1188,7 +1188,7 @@ const char* HelixPrimitive::getDefaultName() const
 
 QString HelixPrimitive::create(const QString& objectName, const QString& placement) const
 {
-    return QString::fromLatin1(
+    return QStringLiteral(
         "App.ActiveDocument.addObject(\"Part::Helix\",\"%1\")\n"
         "App.ActiveDocument.%1.Pitch='%2'\n"
         "App.ActiveDocument.%1.Height='%3'\n"
@@ -1210,7 +1210,7 @@ QString HelixPrimitive::create(const QString& objectName, const QString& placeme
 
 QString HelixPrimitive::change(const QString& objectName, const QString& placement) const
 {
-    return QString::fromLatin1(
+    return QStringLiteral(
         "%1.Pitch='%2'\n"
         "%1.Height='%3'\n"
         "%1.Radius='%4'\n"
@@ -1282,7 +1282,7 @@ const char* SpiralPrimitive::getDefaultName() const
 
 QString SpiralPrimitive::create(const QString& objectName, const QString& placement) const
 {
-    return QString::fromLatin1(
+    return QStringLiteral(
         "App.ActiveDocument.addObject(\"Part::Spiral\",\"%1\")\n"
         "App.ActiveDocument.%1.Growth='%2'\n"
         "App.ActiveDocument.%1.Rotations=%3\n"
@@ -1299,7 +1299,7 @@ QString SpiralPrimitive::create(const QString& objectName, const QString& placem
 
 QString SpiralPrimitive::change(const QString& objectName, const QString& placement) const
 {
-    return QString::fromLatin1(
+    return QStringLiteral(
         "%1.Growth='%2'\n"
         "%1.Rotations=%3\n"
         "%1.Radius='%4'\n"
@@ -1362,7 +1362,7 @@ const char* CirclePrimitive::getDefaultName() const
 
 QString CirclePrimitive::create(const QString& objectName, const QString& placement) const
 {
-    return QString::fromLatin1(
+    return QStringLiteral(
         "App.ActiveDocument.addObject(\"Part::Circle\",\"%1\")\n"
         "App.ActiveDocument.%1.Radius='%2'\n"
         "App.ActiveDocument.%1.Angle1='%3'\n"
@@ -1379,7 +1379,7 @@ QString CirclePrimitive::create(const QString& objectName, const QString& placem
 
 QString CirclePrimitive::change(const QString& objectName, const QString& placement) const
 {
-    return QString::fromLatin1(
+    return QStringLiteral(
         "%1.Radius='%2'\n"
         "%1.Angle1='%3'\n"
         "%1.Angle2='%4'\n"
@@ -1446,7 +1446,7 @@ const char* EllipsePrimitive::getDefaultName() const
 
 QString EllipsePrimitive::create(const QString& objectName, const QString& placement) const
 {
-    return QString::fromLatin1(
+    return QStringLiteral(
         "App.ActiveDocument.addObject(\"Part::Ellipse\",\"%1\")\n"
         "App.ActiveDocument.%1.MajorRadius='%2'\n"
         "App.ActiveDocument.%1.MinorRadius='%3'\n"
@@ -1465,7 +1465,7 @@ QString EllipsePrimitive::create(const QString& objectName, const QString& place
 
 QString EllipsePrimitive::change(const QString& objectName, const QString& placement) const
 {
-    return QString::fromLatin1(
+    return QStringLiteral(
         "%1.MajorRadius='%2'\n"
         "%1.MinorRadius='%3'\n"
         "%1.Angle1='%4'\n"
@@ -1527,7 +1527,7 @@ const char* PolygonPrimitive::getDefaultName() const
 
 QString PolygonPrimitive::create(const QString& objectName, const QString& placement) const
 {
-    return QString::fromLatin1(
+    return QStringLiteral(
         "App.ActiveDocument.addObject(\"Part::RegularPolygon\",\"%1\")\n"
         "App.ActiveDocument.%1.Polygon=%2\n"
         "App.ActiveDocument.%1.Circumradius='%3'\n"
@@ -1542,7 +1542,7 @@ QString PolygonPrimitive::create(const QString& objectName, const QString& place
 
 QString PolygonPrimitive::change(const QString& objectName, const QString& placement) const
 {
-    return QString::fromLatin1(
+    return QStringLiteral(
         "%1.Polygon=%2\n"
         "%1.Circumradius='%3'\n"
         "%1.Placement=%4\n")
@@ -1618,7 +1618,7 @@ const char* LinePrimitive::getDefaultName() const
 
 QString LinePrimitive::create(const QString& objectName, const QString& placement) const
 {
-    return QString::fromLatin1(
+    return QStringLiteral(
         "App.ActiveDocument.addObject(\"Part::Line\",\"%1\")\n"
         "App.ActiveDocument.%1.X1='%2'\n"
         "App.ActiveDocument.%1.Y1='%3'\n"
@@ -1641,7 +1641,7 @@ QString LinePrimitive::create(const QString& objectName, const QString& placemen
 
 QString LinePrimitive::change(const QString& objectName, const QString& placement) const
 {
-    return QString::fromLatin1(
+    return QStringLiteral(
         "%1.X1='%2'\n"
         "%1.Y1='%3'\n"
         "%1.Z1='%4'\n"
@@ -1722,7 +1722,7 @@ const char* VertexPrimitive::getDefaultName() const
 
 QString VertexPrimitive::create(const QString& objectName, const QString& placement) const
 {
-    return QString::fromLatin1(
+    return QStringLiteral(
         "App.ActiveDocument.addObject(\"Part::Vertex\",\"%1\")\n"
         "App.ActiveDocument.%1.X='%2'\n"
         "App.ActiveDocument.%1.Y='%3'\n"
@@ -1739,7 +1739,7 @@ QString VertexPrimitive::create(const QString& objectName, const QString& placem
 
 QString VertexPrimitive::change(const QString& objectName, const QString& placement) const
 {
-    return QString::fromLatin1(
+    return QStringLiteral(
         "%1.X='%2'\n"
         "%1.Y='%3'\n"
         "%1.Z='%4'\n"
@@ -1949,7 +1949,7 @@ void DlgPrimitives::createPrimitive(const QString& placement)
 void DlgPrimitives::acceptChanges(const QString& placement)
 {
     App::Document* doc = featurePtr->getDocument();
-    QString objectName = QString::fromLatin1("App.getDocument(\"%1\").%2")
+    QString objectName = QStringLiteral("App.getDocument(\"%1\").%2")
                          .arg(QString::fromLatin1(doc->getName()),
                               QString::fromLatin1(featurePtr->getNameInDocument()));
 
@@ -2174,7 +2174,7 @@ QString Location::toPlacement() const
     loc.y = ui->YPositionQSB->rawValue();
     loc.z = ui->ZPositionQSB->rawValue();
 
-    return QString::fromLatin1("App.Placement(App.Vector(%1,%2,%3),App.Rotation(App.Vector(%4,%5,%6),%7))")
+    return QStringLiteral("App.Placement(App.Vector(%1,%2,%3),App.Rotation(App.Vector(%4,%5,%6),%7))")
         .arg(loc.x, 0, 'f', Base::UnitsApi::getDecimals())
         .arg(loc.y, 0, 'f', Base::UnitsApi::getDecimals())
         .arg(loc.z, 0, 'f', Base::UnitsApi::getDecimals())
diff --git a/src/Mod/Part/Gui/DlgRevolution.cpp b/src/Mod/Part/Gui/DlgRevolution.cpp
index a6b3255e2e..2e7b834577 100644
--- a/src/Mod/Part/Gui/DlgRevolution.cpp
+++ b/src/Mod/Part/Gui/DlgRevolution.cpp
@@ -233,7 +233,7 @@ void DlgRevolution::setAxisLink(const char* objname, const char* subname)
     if(objname && strlen(objname) > 0){
         QString txt = QString::fromLatin1(objname);
         if (subname && strlen(subname) > 0){
-            txt = txt + QString::fromLatin1(":") + QString::fromLatin1(subname);
+            txt = txt + QStringLiteral(":") + QString::fromLatin1(subname);
         }
         ui->txtAxisLink->setText(txt);
     } else {
@@ -377,38 +377,38 @@ void DlgRevolution::accept()
         QString shape, type, name, solid;
         QList<QTreeWidgetItem *> items = ui->treeWidget->selectedItems();
         if (ui->checkSolid->isChecked()) {
-            solid = QString::fromLatin1("True");}
+            solid = QStringLiteral("True");}
         else {
-            solid = QString::fromLatin1("False");}
+            solid = QStringLiteral("False");}
 
         App::PropertyLinkSub axisLink;
         this->getAxisLink(axisLink);
         QString strAxisLink;
         if (axisLink.getValue()){
-            strAxisLink = QString::fromLatin1("(App.ActiveDocument.%1, %2)")
+            strAxisLink = QStringLiteral("(App.ActiveDocument.%1, %2)")
                     .arg(QString::fromLatin1(axisLink.getValue()->getNameInDocument()),
                          axisLink.getSubValues().size() ==  1 ?
-                             QString::fromLatin1("\"%1\"").arg(QString::fromLatin1(axisLink.getSubValues()[0].c_str()))
+                             QStringLiteral("\"%1\"").arg(QString::fromLatin1(axisLink.getSubValues()[0].c_str()))
                              : QString() );
         } else {
-            strAxisLink = QString::fromLatin1("None");
+            strAxisLink = QStringLiteral("None");
         }
 
         QString symmetric;
         if (ui->checkSymmetric->isChecked()) {
-            symmetric = QString::fromLatin1("True");}
+            symmetric = QStringLiteral("True");}
         else {
-            symmetric = QString::fromLatin1("False");}
+            symmetric = QStringLiteral("False");}
 
         for (auto item : items) {
             shape = item->data(0, Qt::UserRole).toString();
-            type = QString::fromLatin1("Part::Revolution");
+            type = QStringLiteral("Part::Revolution");
             name = QString::fromLatin1(activeDoc->getUniqueObjectName("Revolve").c_str());
             Base::Vector3d axis = this->getDirection();
             Base::Vector3d pos = this->getPosition();
 
 
-            QString code = QString::fromLatin1(
+            QString code = QStringLiteral(
                 "FreeCAD.ActiveDocument.addObject(\"%1\",\"%2\")\n"
                 "FreeCAD.ActiveDocument.%2.Source = FreeCAD.ActiveDocument.%3\n"
                 "FreeCAD.ActiveDocument.%2.Axis = (%4,%5,%6)\n"
@@ -446,7 +446,7 @@ void DlgRevolution::accept()
         return;
     } catch (...){
         QMessageBox::critical(this, windowTitle(),
-            tr("Creating Revolve failed.\n\n%1").arg(QString::fromUtf8("Unknown error")));
+            tr("Creating Revolve failed.\n\n%1").arg(QStringLiteral("Unknown error")));
         return;
     }
 
diff --git a/src/Mod/Part/Gui/DlgScale.cpp b/src/Mod/Part/Gui/DlgScale.cpp
index 4dcd4782f2..e3c87aa6ff 100644
--- a/src/Mod/Part/Gui/DlgScale.cpp
+++ b/src/Mod/Part/Gui/DlgScale.cpp
@@ -226,8 +226,8 @@ void DlgScale::apply()
             name = sourceObj->getDocument()->getUniqueObjectName("Scale").c_str();
             if (addBaseName) {
                 //FIXME: implement
-                //QString baseName = QString::fromLatin1("Scale_%1").arg(sourceObjectName);
-                //label = QString::fromLatin1("%1_Scale").arg((*it)->text(0));
+                //QString baseName = QStringLiteral("Scale_%1").arg(sourceObjectName);
+                //label = QStringLiteral("%1_Scale").arg((*it)->text(0));
             }
 
             FCMD_OBJ_DOC_CMD(sourceObj,"addObject('Part::Scale','" << name << "')");
@@ -257,7 +257,7 @@ void DlgScale::apply()
     }
     catch(...) {
         QMessageBox::critical(this, windowTitle(),
-            tr("Creating Scale failed.\n%1").arg(QString::fromUtf8("Unknown error")));
+            tr("Creating Scale failed.\n%1").arg(QStringLiteral("Unknown error")));
         return;
     }
 }
diff --git a/src/Mod/Part/Gui/DlgSettingsGeneral.cpp b/src/Mod/Part/Gui/DlgSettingsGeneral.cpp
index df3ba13e04..9663487158 100644
--- a/src/Mod/Part/Gui/DlgSettingsGeneral.cpp
+++ b/src/Mod/Part/Gui/DlgSettingsGeneral.cpp
@@ -99,7 +99,7 @@ DlgImportExportIges::DlgImportExportIges(QWidget* parent)
     bg->addButton(ui->radioButtonBRepOn, 1);
 
     QRegularExpression rx;
-    rx.setPattern(QString::fromLatin1("[\\x00-\\x7F]+"));
+    rx.setPattern(QStringLiteral("[\\x00-\\x7F]+"));
     QRegularExpressionValidator* companyValidator = new QRegularExpressionValidator(ui->lineEditCompany);
     companyValidator->setRegularExpression(rx);
     ui->lineEditCompany->setValidator(companyValidator);
diff --git a/src/Mod/Part/Gui/Mirroring.cpp b/src/Mod/Part/Gui/Mirroring.cpp
index 53bc439050..ad456338cb 100644
--- a/src/Mod/Part/Gui/Mirroring.cpp
+++ b/src/Mod/Part/Gui/Mirroring.cpp
@@ -326,9 +326,9 @@ bool Mirroring::accept()
         int pos = label.indexOf(rx);
         if (pos > -1)
             label = label.left(pos);
-        label.append(QString::fromLatin1(" (Mirror #%1)").arg(++count));
+        label.append(QStringLiteral(" (Mirror #%1)").arg(++count));
 
-        QString code = QString::fromLatin1(
+        QString code = QStringLiteral(
             "__doc__=FreeCAD.getDocument(\"%1\")\n"
             "__doc__.addObject(\"Part::Mirroring\")\n"
             "__doc__.ActiveObject.Source=__doc__.getObject(\"%2\")\n"
diff --git a/src/Mod/Part/Gui/SectionCutting.cpp b/src/Mod/Part/Gui/SectionCutting.cpp
index fbfa8b66c2..db8c1b6819 100644
--- a/src/Mod/Part/Gui/SectionCutting.cpp
+++ b/src/Mod/Part/Gui/SectionCutting.cpp
@@ -155,7 +155,7 @@ void SectionCut::initControls(const Base::BoundBox3d& BoundCompound)
             ui->CutColor->setColor(cutColor.asValue<QColor>());
             ui->CutTransparencyHS->setValue(int(cutTransparency));
             ui->CutTransparencyHS->setToolTip(QString::number(cutTransparency)
-                                            + QString::fromLatin1(" %"));
+                                            + QStringLiteral(" %"));
         }
     };
 
@@ -302,7 +302,7 @@ void SectionCut::initBooleanFragmentControls(Gui::ViewProviderGeometryObject* co
         long compoundTransparency = compoundBF->Transparency.getValue();
         ui->BFragTransparencyHS->setValue(int(compoundTransparency));
         ui->BFragTransparencyHS->setToolTip(QString::number(compoundTransparency)
-                                            + QString::fromLatin1(" %"));
+                                            + QStringLiteral(" %"));
         // Part::Cut ignores the cutbox transparency when it is set
         // to zero and the BooleanFragments transparency is not zero
         // therefore limit the cutbox transparency to 1 in this case
@@ -467,14 +467,14 @@ void SectionCut::setAutoTransparency(int value)
         ui->CutTransparencyHS->blockSignals(true);
         ui->CutTransparencyHS->setValue(value);
         ui->CutTransparencyHS->setToolTip(QString::number(value)
-                                          + QString::fromLatin1(" %"));
+                                          + QStringLiteral(" %"));
         ui->CutTransparencyHS->blockSignals(false);
     }
     if (ui->autoBFColorCB->isChecked()) {
         ui->BFragTransparencyHS->blockSignals(true);
         ui->BFragTransparencyHS->setValue(value);
         ui->BFragTransparencyHS->setToolTip(QString::number(value)
-                                          + QString::fromLatin1(" %"));
+                                          + QStringLiteral(" %"));
         ui->BFragTransparencyHS->blockSignals(false);
     }
 }
@@ -2097,9 +2097,9 @@ void SectionCut::changeCutBoxColors()
 
 void SectionCut::onTransparencyHSMoved(int val)
 {
-    ui->CutTransparencyHS->setToolTip(QString::number(val) + QString::fromLatin1(" %"));
+    ui->CutTransparencyHS->setToolTip(QString::number(val) + QStringLiteral(" %"));
     // highlight the tooltip
-    QToolTip::showText(QCursor::pos(), QString::number(val) + QString::fromLatin1(" %"), nullptr);
+    QToolTip::showText(QCursor::pos(), QString::number(val) + QStringLiteral(" %"), nullptr);
     if (ui->groupBoxX->isChecked() || ui->groupBoxY->isChecked() || ui->groupBoxZ->isChecked()) {
         changeCutBoxColors();
     }
@@ -2201,9 +2201,9 @@ void SectionCut::onBFragTransparencyHSMoved(int val)
         ui->CutTransparencyHS->setMinimum(0);
     }
 
-    ui->BFragTransparencyHS->setToolTip(QString::number(val) + QString::fromLatin1(" %"));
+    ui->BFragTransparencyHS->setToolTip(QString::number(val) + QStringLiteral(" %"));
     // highlight the tooltip
-    QToolTip::showText(QCursor::pos(), QString::number(val) + QString::fromLatin1(" %"), nullptr);
+    QToolTip::showText(QCursor::pos(), QString::number(val) + QStringLiteral(" %"), nullptr);
 
     // when there is no cut yet, there is nothing else to do
     if (ui->groupBoxX->isChecked() || ui->groupBoxY->isChecked() || ui->groupBoxZ->isChecked()) {
diff --git a/src/Mod/Part/Gui/TaskAttacher.cpp b/src/Mod/Part/Gui/TaskAttacher.cpp
index 7d70f4ee69..56f6d010e6 100644
--- a/src/Mod/Part/Gui/TaskAttacher.cpp
+++ b/src/Mod/Part/Gui/TaskAttacher.cpp
@@ -78,7 +78,7 @@ const QString makeRefString(const App::DocumentObject* obj, const std::string& s
     App::GeoFeature::resolveElement(obj, sub.c_str(), el, true);
 
     return QString::fromLatin1(obj->getNameInDocument())
-        + (sub.length() > 0 ? QString::fromLatin1(":") : QString())
+        + (sub.length() > 0 ? QStringLiteral(":") : QString())
         + QString::fromLatin1(el.oldName.c_str());
 }
 
@@ -328,7 +328,7 @@ bool TaskAttacher::updatePreview()
     }
     if (errMessage.length() > 0) {
         ui->message->setText(tr("Attachment mode failed: %1").arg(errMessage));
-        ui->message->setStyleSheet(QString::fromLatin1("QLabel{color: red;}"));
+        ui->message->setStyleSheet(QStringLiteral("QLabel{color: red;}"));
     }
     else {
         if (!attached) {
@@ -338,7 +338,7 @@ bool TaskAttacher::updatePreview()
         else {
             std::vector<QString> strs = AttacherGui::getUIStrings(pcAttach->attacher().getTypeId(), eMapMode(pcAttach->MapMode.getValue()));
             ui->message->setText(tr("Attached with mode %1").arg(strs[0]));
-            ui->message->setStyleSheet(QString::fromLatin1("QLabel{color: green;}"));
+            ui->message->setStyleSheet(QStringLiteral("QLabel{color: green;}"));
         }
     }
     QString splmLabelText = attached ? tr("Attachment Offset (in local coordinates):") : tr("Attachment Offset (inactive - not attached):");
@@ -592,7 +592,7 @@ void TaskAttacher::addToReference(const std::vector<SubAndObjName>& pairs)
     }
     catch (Base::Exception& e) {
         ui->message->setText(QCoreApplication::translate("Exception", e.what()));
-        ui->message->setStyleSheet(QString::fromLatin1("QLabel{color: red;}"));
+        ui->message->setStyleSheet(QStringLiteral("QLabel{color: red;}"));
     }
 
     updateReferencesUI();
@@ -768,7 +768,7 @@ void TaskAttacher::onRefName(const QString& text, unsigned idx)
 
     QStringList parts = text.split(QChar::fromLatin1(':'));
     if (parts.length() < 2)
-        parts.push_back(QString::fromLatin1(""));
+        parts.push_back(QStringLiteral(""));
     // Check whether this is the name of an App::Plane or Part::Datum feature
     App::DocumentObject* obj = ViewProvider->getObject()->getDocument()->getObject(parts[0].toLatin1());
     if (!obj)
@@ -796,21 +796,21 @@ void TaskAttacher::onRefName(const QString& text, unsigned idx)
             QRegularExpressionMatch match;
             std::stringstream ss;
 
-            rx.setPattern(QString::fromLatin1("^") + tr("Face") + QString::fromLatin1("(\\d+)$"));
+            rx.setPattern(QStringLiteral("^") + tr("Face") + QStringLiteral("(\\d+)$"));
             if (part.indexOf(rx, 0, &match) >= 0) {
                 int faceId = match.captured(1).toInt();
                 ss << "Face" << faceId;
                 return ss.str();
             }
 
-            rx.setPattern(QString::fromLatin1("^") + tr("Edge") + QString::fromLatin1("(\\d+)$"));
+            rx.setPattern(QStringLiteral("^") + tr("Edge") + QStringLiteral("(\\d+)$"));
             if (part.indexOf(rx, 0, &match) >= 0) {
                 int lineId = match.captured(1).toInt();
                 ss << "Edge" << lineId;
                 return ss.str();
             }
 
-            rx.setPattern(QString::fromLatin1("^") + tr("Vertex") + QString::fromLatin1("(\\d+)$"));
+            rx.setPattern(QStringLiteral("^") + tr("Vertex") + QStringLiteral("(\\d+)$"));
             if (part.indexOf(rx, 0, &match) >= 0) {
                 int vertexId = match.captured(1).toInt();
                 ss << "Vertex" << vertexId;
@@ -995,9 +995,9 @@ void TaskAttacher::updateListOfModes()
             QString tooltip = mstr[1];
 
             if (mmode != mmDeactivated) {
-                tooltip += QString::fromLatin1("\n\n%1\n%2")
+                tooltip += QStringLiteral("\n\n%1\n%2")
                     .arg(tr("Reference combinations:"),
-                        AttacherGui::getRefListForMode(pcAttach->attacher(), mmode).join(QString::fromLatin1("\n")));
+                        AttacherGui::getRefListForMode(pcAttach->attacher(), mmode).join(QStringLiteral("\n")));
             }
             item->setToolTip(tooltip);
 
@@ -1015,7 +1015,7 @@ void TaskAttacher::updateListOfModes()
                     }
                     item->setText(tr("%1 (add %2)").arg(
                         item->text(),
-                        buf.join(QString::fromLatin1("+"))
+                        buf.join(QStringLiteral("+"))
                     ));
                 }
                 else {
@@ -1133,7 +1133,7 @@ void TaskAttacher::visibilityAutomation(bool opening_not_closing)
         App::DocumentObject* editObj,
         const std::string& editSubName) {
         if (opening_not_closing) {
-            QString code = QString::fromLatin1(
+            QString code = QStringLiteral(
                 "import Show\n"
                 "from Show.Containers import isAContainer\n"
                 "_tv_%4 = Show.TempoVis(App.ActiveDocument, tag= 'PartGui::TaskAttacher')\n"
@@ -1158,7 +1158,7 @@ void TaskAttacher::visibilityAutomation(bool opening_not_closing)
             Gui::Command::runCommand(Gui::Command::Gui, code.toLatin1().constData());
         }
         else if (!postfix.empty()) {
-            QString code = QString::fromLatin1(
+            QString code = QStringLiteral(
                 "_tv_%1.restore()\n"
                 "del(_tv_%1)"
             ).arg(QString::fromLatin1(postfix.c_str()));
diff --git a/src/Mod/Part/Gui/TaskCheckGeometry.cpp b/src/Mod/Part/Gui/TaskCheckGeometry.cpp
index 759ed2e114..378d3de02d 100644
--- a/src/Mod/Part/Gui/TaskCheckGeometry.cpp
+++ b/src/Mod/Part/Gui/TaskCheckGeometry.cpp
@@ -915,7 +915,7 @@ void TaskCheckGeometryResults::currentRowChanged (const QModelIndex &current, co
 
 bool TaskCheckGeometryResults::split(QString &input, QString &doc, QString &object, QString &sub)
 {
-    QStringList strings = input.split(QString::fromLatin1("."));
+    QStringList strings = input.split(QStringLiteral("."));
     if (strings.size() != 3)
         return false;
     doc = strings.at(0);
diff --git a/src/Mod/Part/Gui/TaskFaceAppearances.cpp b/src/Mod/Part/Gui/TaskFaceAppearances.cpp
index 234cf8a4ac..0341d443fd 100644
--- a/src/Mod/Part/Gui/TaskFaceAppearances.cpp
+++ b/src/Mod/Part/Gui/TaskFaceAppearances.cpp
@@ -397,14 +397,14 @@ void FaceAppearances::onSelectionChanged(const Gui::SelectionChanges& msg)
 
 void FaceAppearances::updatePanel()
 {
-    QString faces = QString::fromLatin1("[");
+    QString faces = QStringLiteral("[");
     int size = d->index.size();
     for (int it : d->index) {
         faces += QString::number(it + 1);
         if (--size > 0)
-            faces += QString::fromLatin1(",");
+            faces += QStringLiteral(",");
     }
-    faces += QString::fromLatin1("]");
+    faces += QStringLiteral("]");
 
     int maxWidth = d->ui->labelElement->width();
     QFontMetrics fm(d->ui->labelElement->font());
diff --git a/src/Mod/Part/Gui/TaskLoft.cpp b/src/Mod/Part/Gui/TaskLoft.cpp
index 6755ac19af..3578a61a81 100644
--- a/src/Mod/Part/Gui/TaskLoft.cpp
+++ b/src/Mod/Part/Gui/TaskLoft.cpp
@@ -159,19 +159,19 @@ bool LoftWidget::accept()
 {
     QString list, solid, ruled, closed;
     if (d->ui.checkSolid->isChecked())
-        solid = QString::fromLatin1("True");
+        solid = QStringLiteral("True");
     else
-        solid = QString::fromLatin1("False");
+        solid = QStringLiteral("False");
 
     if (d->ui.checkRuledSurface->isChecked())
-        ruled = QString::fromLatin1("True");
+        ruled = QStringLiteral("True");
     else
-        ruled = QString::fromLatin1("False");
+        ruled = QStringLiteral("False");
 
     if (d->ui.checkClosed->isChecked())
-        closed = QString::fromLatin1("True");
+        closed = QStringLiteral("True");
     else
-        closed = QString::fromLatin1("False");
+        closed = QStringLiteral("False");
 
     QTextStream str(&list);
 
@@ -188,7 +188,7 @@ bool LoftWidget::accept()
 
     try {
         QString cmd;
-        cmd = QString::fromLatin1(
+        cmd = QStringLiteral(
             "App.getDocument('%5').addObject('Part::Loft','Loft')\n"
             "App.getDocument('%5').ActiveObject.Sections=[%1]\n"
             "App.getDocument('%5').ActiveObject.Solid=%2\n"
diff --git a/src/Mod/Part/Gui/TaskShapeBuilder.cpp b/src/Mod/Part/Gui/TaskShapeBuilder.cpp
index cacefb8d35..0a725c9850 100644
--- a/src/Mod/Part/Gui/TaskShapeBuilder.cpp
+++ b/src/Mod/Part/Gui/TaskShapeBuilder.cpp
@@ -252,7 +252,7 @@ void ShapeBuilderWidget::createEdgeFromVertex()
     }
 
     QString cmd;
-    cmd = QString::fromLatin1(
+    cmd = QStringLiteral(
         "_=Part.makeLine(%1, %2)\n"
         "if _.isNull(): raise RuntimeError('Failed to create edge')\n"
         "App.ActiveDocument.addObject('Part::Feature','Edge').Shape=_\n"
@@ -294,7 +294,7 @@ void ShapeBuilderWidget::createWireFromEdge()
     str << "]";
 
     QString cmd;
-    cmd = QString::fromLatin1(
+    cmd = QStringLiteral(
         "_=Part.Wire(Part.__sortEdges__(%1))\n"
         "if _.isNull(): raise RuntimeError('Failed to create a wire')\n"
         "App.ActiveDocument.addObject('Part::Feature','Wire').Shape=_\n"
@@ -336,7 +336,7 @@ void ShapeBuilderWidget::createFaceFromVertex()
 
     QString cmd;
     if (d->ui.checkPlanar->isChecked()) {
-        cmd = QString::fromLatin1(
+        cmd = QStringLiteral(
             "_=Part.Face(Part.makePolygon(%1, True))\n"
             "if _.isNull(): raise RuntimeError('Failed to create face')\n"
             "App.ActiveDocument.addObject('Part::Feature','Face').Shape=_\n"
@@ -344,7 +344,7 @@ void ShapeBuilderWidget::createFaceFromVertex()
         ).arg(list);
     }
     else {
-        cmd = QString::fromLatin1(
+        cmd = QStringLiteral(
             "_=Part.makeFilledFace(Part.makePolygon(%1, True).Edges)\n"
             "if _.isNull(): raise RuntimeError('Failed to create face')\n"
             "App.ActiveDocument.addObject('Part::Feature','Face').Shape=_\n"
@@ -388,7 +388,7 @@ void ShapeBuilderWidget::createFaceFromEdge()
 
     QString cmd;
     if (d->ui.checkPlanar->isChecked()) {
-        cmd = QString::fromLatin1(
+        cmd = QStringLiteral(
             "_=Part.Face(Part.Wire(Part.__sortEdges__(%1)))\n"
             "if _.isNull(): raise RuntimeError('Failed to create face')\n"
             "App.ActiveDocument.addObject('Part::Feature','Face').Shape=_\n"
@@ -396,7 +396,7 @@ void ShapeBuilderWidget::createFaceFromEdge()
         ).arg(list);
     }
     else {
-        cmd = QString::fromLatin1(
+        cmd = QStringLiteral(
             "_=Part.makeFilledFace(Part.__sortEdges__(%1))\n"
             "if _.isNull(): raise RuntimeError('Failed to create face')\n"
             "App.ActiveDocument.addObject('Part::Feature','Face').Shape=_\n"
@@ -449,7 +449,7 @@ void ShapeBuilderWidget::createShellFromFace()
 
     QString cmd;
     if (d->ui.checkRefine->isEnabled() && d->ui.checkRefine->isChecked()) {
-        cmd = QString::fromLatin1(
+        cmd = QStringLiteral(
             "_=Part.Shell(%1)\n"
             "if _.isNull(): raise RuntimeError('Failed to create shell')\n"
             "App.ActiveDocument.addObject('Part::Feature','Shell').Shape=_.removeSplitter()\n"
@@ -457,7 +457,7 @@ void ShapeBuilderWidget::createShellFromFace()
         ).arg(list);
     }
     else {
-        cmd = QString::fromLatin1(
+        cmd = QStringLiteral(
             "_=Part.Shell(%1)\n"
             "if _.isNull(): raise RuntimeError('Failed to create shell')\n"
             "App.ActiveDocument.addObject('Part::Feature','Shell').Shape=_\n"
@@ -497,7 +497,7 @@ void ShapeBuilderWidget::createSolidFromShell()
 
     QString cmd;
     if (d->ui.checkRefine->isEnabled() && d->ui.checkRefine->isChecked()) {
-        cmd = QString::fromLatin1(
+        cmd = QStringLiteral(
             "shell=%1\n"
             "if shell.ShapeType != 'Shell': raise RuntimeError('Part object is not a shell')\n"
             "_=Part.Solid(shell)\n"
@@ -507,7 +507,7 @@ void ShapeBuilderWidget::createSolidFromShell()
         ).arg(line);
     }
     else {
-        cmd = QString::fromLatin1(
+        cmd = QStringLiteral(
             "shell=%1\n"
             "if shell.ShapeType != 'Shell': raise RuntimeError('Part object is not a shell')\n"
             "_=Part.Solid(shell)\n"
diff --git a/src/Mod/Part/Gui/TaskSweep.cpp b/src/Mod/Part/Gui/TaskSweep.cpp
index d00a0c8b51..8e12ff9b5a 100644
--- a/src/Mod/Part/Gui/TaskSweep.cpp
+++ b/src/Mod/Part/Gui/TaskSweep.cpp
@@ -315,14 +315,14 @@ bool SweepWidget::accept()
 
     QString list, solid, frenet;
     if (d->ui.checkSolid->isChecked())
-        solid = QString::fromLatin1("True");
+        solid = QStringLiteral("True");
     else
-        solid = QString::fromLatin1("False");
+        solid = QStringLiteral("False");
 
     if (d->ui.checkFrenet->isChecked())
-        frenet = QString::fromLatin1("True");
+        frenet = QStringLiteral("True");
     else
-        frenet = QString::fromLatin1("False");
+        frenet = QStringLiteral("False");
 
     QTextStream str(&list);
 
@@ -349,7 +349,7 @@ bool SweepWidget::accept()
     try {
         Gui::WaitCursor wc;
         QString cmd;
-        cmd = QString::fromLatin1(
+        cmd = QStringLiteral(
             "App.getDocument('%5').addObject('Part::Sweep','Sweep')\n"
             "App.getDocument('%5').ActiveObject.Sections=[%1]\n"
             "App.getDocument('%5').ActiveObject.Spine=%2\n"