Use QSaveFile class for saving a layout.

src/app/puzzle/vpmainwindow.cpp

@@ -32,6 +32,7 @@
 #include <QtMath>
 #include <QSvgGenerator>
 #include <QFileSystemWatcher>
+#include <QSaveFile>
 
 #include "ui_vpmainwindow.h"
 #include "dialogs/vpdialogabout.h"
@@ -268,21 +269,33 @@ void VPMainWindow::SetCurrentFile(const QString &fileName)
 //---------------------------------------------------------------------------------------------------------------------
 auto VPMainWindow::SaveLayout(const QString &path, QString &error) -> bool
 {
-    QFile file(path);
-    file.open(QIODevice::WriteOnly);
-
-    VPLayoutFileWriter fileWriter;
-    fileWriter.WriteFile(m_layout, &file);
-
-    if (fileWriter.hasError())
+    bool success = false;
+    QSaveFile file(path);
+    // cppcheck-suppress ConfigurationNotChecked
+    if (file.open(QIODevice::WriteOnly))
     {
-        error = tr("Fail to create layout.");
-        return false;
+        VPLayoutFileWriter fileWriter;
+        fileWriter.WriteFile(m_layout, &file);
+
+        if (fileWriter.hasError())
+        {
+            error = tr("Fail to create layout.");
+            return false;
+        }
+
+        success = file.commit();
     }
 
-    SetCurrentFile(path);
-    LayoutWasSaved(true);
-    return true;
+    if (success)
+    {
+        SetCurrentFile(path);
+        LayoutWasSaved(true);
+    }
+    else
+    {
+        error = file.errorString();
+    }
+    return success;
 }
 
 //---------------------------------------------------------------------------------------------------------------------

src/app/puzzle/xml/vplayoutfilewriter.cpp

@@ -137,7 +137,7 @@ auto GrainlineArrowDirrectionToString(GrainlineArrowDirection type) -> QString
 }  // namespace
 
 //---------------------------------------------------------------------------------------------------------------------
-void VPLayoutFileWriter::WriteFile(VPLayout *layout, QFile *file)
+void VPLayoutFileWriter::WriteFile(VPLayout *layout, QIODevice *file)
 {
     setDevice(file);
     setAutoFormatting(true);

src/app/puzzle/xml/vplayoutfilewriter.h

@@ -51,7 +51,7 @@ public:
     VPLayoutFileWriter()= default;
     ~VPLayoutFileWriter()= default;
 
-    void WriteFile(VPLayout *layout, QFile *file);
+    void WriteFile(VPLayout *layout, QIODevice *file);
 
 private:
     void WriteLayout(VPLayout *layout);