Improve error handling for the dxf export.

ChangeLog.txt

@@ -7,6 +7,7 @@
 - [smart-pattern/valentina#122] Extend piece bounding rect.
 - Remember last selected export format.
 - [smart-pattern/valentina#123] Error inside Save layout dialog.
+- Improve error handling for the dxf export.
 
 # Version 0.7.46 Mar 31, 2021
 - Fix incorrect calculation of value for multisize measurements in Valentina.

src/libs/vdxf/dxiface.cpp

@@ -110,6 +110,11 @@ void dx_iface::writeEntity(DRW_Entity* e){
     }
 }
 
+std::string dx_iface::ErrorString() const
+{
+    return dxfW->ErrorString();
+}
+
 void dx_iface::writeHeader(DRW_Header &data){
     //complete copy of header vars:
     data = cData.headerC;

src/libs/vdxf/dxiface.h

@@ -101,6 +101,8 @@ public:
     bool fileExport(bool binary);
     void writeEntity(DRW_Entity* e);
 
+    std::string ErrorString() const;
+
 //reimplement virtual DRW_Interface functions
 //writer part, send all in class dx_data to writer
     virtual void writeHeader(DRW_Header& data) override;

src/libs/vdxf/libdxfrw/libdxfrw.cpp

@@ -123,9 +123,12 @@ bool dxfRW::read(DRW_Interface *interface_, bool ext){
 bool dxfRW::write(DRW_Interface *interface_, DRW::Version ver, bool bin){
     bool isOk = false;
     std::ofstream filestr;
+    filestr.exceptions(std::ifstream::failbit | std::ifstream::badbit);
     version = ver;
     binFile = bin;
     iface = interface_;
+    try
+    {
         if (binFile) {
             filestr.open (fileName.c_str(), std::ios_base::out | std::ios::binary | std::ios::trunc);
             //write sentinel
@@ -172,6 +175,14 @@ bool dxfRW::write(DRW_Interface *interface_, DRW::Version ver, bool bin){
         writer->writeString(0, "EOF");
         filestr.flush();
         filestr.close();
+    }
+    catch(std::ofstream::failure &writeErr)
+    {
+        errorString = writeErr.what();
+        delete writer;
+        writer = nullptr;
+        return isOk;
+    }
     isOk = true;
     delete writer;
     writer = nullptr;
@@ -1160,6 +1171,11 @@ bool dxfRW::writeDimension(DRW_Dimension *ent) {
     return true;
 }
 
+std::string dxfRW::ErrorString() const
+{
+    return errorString;
+}
+
 bool dxfRW::writeInsert(DRW_Insert *ent){
     writer->writeString(0, "INSERT");
     writeEntity(ent);

src/libs/vdxf/libdxfrw/libdxfrw.h

@@ -72,6 +72,8 @@ public:
     bool writeDimension(DRW_Dimension *ent);
     void setEllipseParts(int parts){elParts = parts;} /*!< set parts munber when convert ellipse to polyline */
 
+    std::string ErrorString() const;
+
 private:
     Q_DISABLE_COPY(dxfRW)
     /// used by read() to parse the content of the file
@@ -144,6 +146,7 @@ private:
 
     int currHandle;
 
+    std::string errorString{};
 };
 
 #endif // LIBDXFRW_H

src/libs/vdxf/vdxfengine.cpp

@@ -138,8 +138,7 @@ bool VDxfEngine::begin(QPaintDevice *pdev)
 //---------------------------------------------------------------------------------------------------------------------
 bool VDxfEngine::end()
 {
-    const bool res = input->fileExport(m_binary);
+    return input->fileExport(m_binary);
-    return res;
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -611,6 +610,12 @@ void VDxfEngine::SetYScale(const qreal &yscale)
     m_yscale = yscale;
 }
 
+//---------------------------------------------------------------------------------------------------------------------
+QString VDxfEngine::ErrorString() const
+{
+    return QString::fromStdString(input->ErrorString());
+}
+
 //---------------------------------------------------------------------------------------------------------------------
 QT_WARNING_PUSH
 QT_WARNING_DISABLE_GCC("-Wswitch-default")
@@ -668,7 +673,7 @@ bool VDxfEngine::ExportToAAMA(const QVector<VLayoutPiece> &details)
 
     for(auto detail : details)
     {
-        dx_ifaceBlock *detailBlock = new dx_ifaceBlock();
+        auto *detailBlock = new dx_ifaceBlock();
 
         QString blockName = detail.GetName();
         if (m_version <= DRW::AC1009)
@@ -691,7 +696,7 @@ bool VDxfEngine::ExportToAAMA(const QVector<VLayoutPiece> &details)
 
         input->AddBlock(detailBlock);
 
-        DRW_Insert *insert = new DRW_Insert();
+        auto *insert = new DRW_Insert();
         insert->name = blockName.toStdString();
         insert->layer = '1';
 
@@ -869,7 +874,7 @@ bool VDxfEngine::ExportToASTM(const QVector<VLayoutPiece> &details)
 
     for(auto detail : details)
     {
-        dx_ifaceBlock *detailBlock = new dx_ifaceBlock();
+        auto *detailBlock = new dx_ifaceBlock();
 
         QString blockName = detail.GetName();
         if (m_version <= DRW::AC1009)
@@ -894,7 +899,7 @@ bool VDxfEngine::ExportToASTM(const QVector<VLayoutPiece> &details)
 
         input->AddBlock(detailBlock);
 
-        DRW_Insert *insert = new DRW_Insert();
+        auto *insert = new DRW_Insert();
         insert->name = blockName.toStdString();
         insert->layer = '1';
 

src/libs/vdxf/vdxfengine.h

@@ -98,6 +98,8 @@ public:
     qreal GetYScale() const;
     void  SetYScale(const qreal &yscale);
 
+    QString ErrorString() const;
+
 private:
     Q_DISABLE_COPY(VDxfEngine)
     QSize            size;

src/libs/vdxf/vdxfpaintdevice.cpp

@@ -214,6 +214,12 @@ bool VDxfPaintDevice::ExportToASTM(const QVector<VLayoutPiece> &details) const
     return res;
 }
 
+//---------------------------------------------------------------------------------------------------------------------
+QString VDxfPaintDevice::ErrorString() const
+{
+    return engine->ErrorString();
+}
+
 //---------------------------------------------------------------------------------------------------------------------
 int VDxfPaintDevice::metric(QPaintDevice::PaintDeviceMetric metric) const
 {

src/libs/vdxf/vdxfpaintdevice.h

@@ -75,6 +75,8 @@ public:
     bool ExportToAAMA(const QVector<VLayoutPiece> &details) const;
     bool ExportToASTM(const QVector<VLayoutPiece> &details) const;
 
+    QString ErrorString() const;
+
 protected:
     virtual int metric(PaintDeviceMetric metric) const override;
 private:

src/libs/vlayout/vlayoutexporter.cpp

@@ -301,7 +301,11 @@ void VLayoutExporter::ExportToFlatDXF(QGraphicsScene *scene, const QList<QList<Q
     {
         painter.scale(m_xScale, m_yScale);
         scene->render(&painter, m_imageRect, m_imageRect, Qt::IgnoreAspectRatio);
-        painter.end();
+        if (not painter.end())
+        {
+            qCritical() << tr("Can't create an flat dxf file.")
+                        << generator.ErrorString();
+        }
     }
 
     RestoreTextAfterDXF(endStringPlaceholder, details);
@@ -319,7 +323,11 @@ void VLayoutExporter::ExportToAAMADXF(const QVector<VLayoutPiece> &details) cons
     generator.setInsunits(VarInsunits::Millimeters);// Decided to always use mm. See issue #745
     generator.SetXScale(m_xScale);
     generator.SetYScale(m_yScale);
-    generator.ExportToAAMA(details);
+    if (not generator.ExportToAAMA(details))
+    {
+        qCritical() << tr("Can't create an AAMA dxf file.")
+                    << generator.ErrorString();
+    }
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -334,7 +342,11 @@ void VLayoutExporter::ExportToASTMDXF(const QVector<VLayoutPiece> &details) cons
     generator.setInsunits(VarInsunits::Millimeters);// Decided to always use mm. See issue #745
     generator.SetXScale(m_xScale);
     generator.SetYScale(m_yScale);
-    generator.ExportToASTM(details);
+    if (not generator.ExportToASTM(details))
+    {
+        qCritical() << tr("Can't create an ASTM dxf file.")
+                    << generator.ErrorString();
+    }
 }
 
 //---------------------------------------------------------------------------------------------------------------------