Make load function return true/false to fine control DoExport

--HG--
branch : develop

src/app/valentina/core/vcmdexport.h

@@ -29,11 +29,14 @@ inline QTextStream& vStdErr()
 }
 
 //---------------------------------------------------------------------------------------------------------------------
-NORET_ATTR inline void AppAbort(const QString& text, int code = GENERAL_ERROR_STATUS)
+NORET_ATTR inline void AppAbort(const QString& text = QString(), int code = GENERAL_ERROR_STATUS)
 {
     //well ..std::runtime_error was leading to zombies in memory and a lot of dumping all the time ...better to do just exit
     //possibly compiler do not have -fexceptions set
-    vStdErr() << text << "\n";
+    if (!text.isEmpty())
+    {
+        vStdErr() << text << "\n";
+    }
     std::exit(code);
 }
 //---------------------------------------------------------------------------------------------------------------------

src/app/valentina/main.cpp

@@ -31,8 +31,8 @@
 #include <QMessageBox> // For QT_REQUIRE_VERSION
 
 // Lock producing random attribute order in XML
- // https://stackoverflow.com/questions/27378143/qt-5-produce-random-attribute-order-in-xml
- extern Q_CORE_EXPORT QBasicAtomicInt qt_qhash_seed;
+// https://stackoverflow.com/questions/27378143/qt-5-produce-random-attribute-order-in-xml
+extern Q_CORE_EXPORT QBasicAtomicInt qt_qhash_seed;
 
 //---------------------------------------------------------------------------------------------------------------------
 
@@ -69,10 +69,13 @@ int main(int argc, char *argv[])
 
     for (size_t i=0, sz = args.size(); i < sz;++i)
     {
-        w.LoadPattern(args.at(static_cast<int>(i)), app.CommandLine()->OptMeasurePath());
+        bool loaded = w.LoadPattern(args.at(static_cast<int>(i)), app.CommandLine()->OptMeasurePath());
         if (app.CommandLine()->IsExportEnabled())
-        {            
-            w.DoExport(app.CommandLine());
+        {
+            if (loaded)
+            {
+                w.DoExport(app.CommandLine());
+            }
             break;
         }
     }

src/app/valentina/mainwindow.cpp

@@ -3024,21 +3024,21 @@ MainWindow::~MainWindow()
  * @brief LoadPattern open pattern file.
  * @param fileName name of file.
  */
-void MainWindow::LoadPattern(const QString &fileName, const QString& customMeasureFile)
+bool MainWindow::LoadPattern(const QString &fileName, const QString& customMeasureFile)
 {
     qCDebug(vMainWindow, "Loading new file %s.", fileName.toUtf8().constData());
 
     //We have unsaved changes or load more then one file per time
     if (OpenNewValentina(fileName))
     {
-        return;
+        return false;
     }
 
     if (fileName.isEmpty())
     {
         qCDebug(vMainWindow, "Got empty file.");
         Clear();
-        return;
+        return false;
     }
 
 #if QT_VERSION >= QT_VERSION_CHECK(5, 1, 0)
@@ -3057,7 +3057,7 @@ void MainWindow::LoadPattern(const QString &fileName, const QString& customMeasu
         {
             qCCritical(vMainWindow, "%s", tr("This file already opened in another window.").toUtf8().constData());
             Clear();
-            return;
+            return false;
         }
     }
 #endif //QT_VERSION >= QT_VERSION_CHECK(5, 1, 0)
@@ -3092,13 +3092,13 @@ void MainWindow::LoadPattern(const QString &fileName, const QString& customMeasu
             if (path.isEmpty())
             {
                 Clear();
-                return;
+                return false;
             }
 
             if (not LoadMeasurements(path))
             {
                 Clear();
-                return;
+                return false;
             }
             else
             {
@@ -3119,8 +3119,8 @@ void MainWindow::LoadPattern(const QString &fileName, const QString& customMeasu
         {
             vStdErr() << tr("File error.") << e.MoreInformation() << "\n";
         }
-        Clear();
-        return;
+        Clear();        
+        return false;
     }
 
 #ifdef Q_OS_WIN32
@@ -3148,6 +3148,7 @@ void MainWindow::LoadPattern(const QString &fileName, const QString& customMeasu
 
         ui->actionDraw->setChecked(true);
     }
+    return true;
 }
 
 //---------------------------------------------------------------------------------------------------------------------

src/app/valentina/mainwindow.h

@@ -60,7 +60,7 @@ class MainWindow : public MainWindowsNoGUI
 public:
     explicit MainWindow(QWidget *parent = nullptr);
     virtual ~MainWindow() Q_DECL_OVERRIDE;
-    void               LoadPattern(const QString &curFile, const QString &customMeasureFile = QString());
+    bool LoadPattern(const QString &curFile, const QString &customMeasureFile = QString());
     void               ReopenFilesAfterCrash(QStringList &args);
 
     void DoExport(const VCommandLinePtr& expParams);