DXF export preserve dashed line style

m-kuhn · m-kuhn · commit f81b680aa100 · 2019-11-29T17:58:02.000+01:00
We do not (yet) support an option to guarantee stroked parts at corners.
So also do not set this flag in the DXF export.
diff --git a/python/core/auto_additions/qgsdxfexport.py b/python/core/auto_additions/qgsdxfexport.py
@@ -24,3 +24,14 @@
 QgsDxfExport.HAlign.Undefined.__doc__ = "Undefined"
 QgsDxfExport.HAlign.__doc__ = 'Horizontal alignments.\n\n' + '* ``HLeft``: ' + QgsDxfExport.HAlign.HLeft.__doc__ + '\n' + '* ``HCenter``: ' + QgsDxfExport.HAlign.HCenter.__doc__ + '\n' + '* ``HRight``: ' + QgsDxfExport.HAlign.HRight.__doc__ + '\n' + '* ``HAligned``: ' + QgsDxfExport.HAlign.HAligned.__doc__ + '\n' + '* ``HMiddle``: ' + QgsDxfExport.HAlign.HMiddle.__doc__ + '\n' + '* ``HFit``: ' + QgsDxfExport.HAlign.HFit.__doc__ + '\n' + '* ``Undefined``: ' + QgsDxfExport.HAlign.Undefined.__doc__
 # --
+# monkey patching scoped based enum
+QgsDxfExport.DxfPolylineFlag.Closed.__doc__ = "This is a closed polyline (or a polygon mesh closed in the M direction)"
+QgsDxfExport.DxfPolylineFlag.Curve.__doc__ = "Curve-fit vertices have been added"
+QgsDxfExport.DxfPolylineFlag.Spline.__doc__ = ""
+QgsDxfExport.DxfPolylineFlag.Is3DPolyline.__doc__ = "This is a 3D polyline"
+QgsDxfExport.DxfPolylineFlag.Is3DPolygonMesh.__doc__ = "This is a 3D polygon mesh"
+QgsDxfExport.DxfPolylineFlag.PolygonMesh.__doc__ = "The polygon mesh is closed in the N direction"
+QgsDxfExport.DxfPolylineFlag.PolyfaceMesh.__doc__ = "The polyline is a polyface mesh"
+QgsDxfExport.DxfPolylineFlag.ContinuousPattern.__doc__ = "The linetype pattern is generated continuously around the vertices of this polyline"
+QgsDxfExport.DxfPolylineFlag.__doc__ = '\n\n' + '* ``Closed``: ' + QgsDxfExport.DxfPolylineFlag.Closed.__doc__ + '\n' + '* ``Curve``: ' + QgsDxfExport.DxfPolylineFlag.Curve.__doc__ + '\n' + '* ``Spline``: ' + QgsDxfExport.DxfPolylineFlag.Spline.__doc__ + '\n' + '* ``Is3DPolyline``: ' + QgsDxfExport.DxfPolylineFlag.Is3DPolyline.__doc__ + '\n' + '* ``Is3DPolygonMesh``: ' + QgsDxfExport.DxfPolylineFlag.Is3DPolygonMesh.__doc__ + '\n' + '* ``PolygonMesh``: ' + QgsDxfExport.DxfPolylineFlag.PolygonMesh.__doc__ + '\n' + '* ``PolyfaceMesh``: ' + QgsDxfExport.DxfPolylineFlag.PolyfaceMesh.__doc__ + '\n' + '* ``ContinuousPattern``: ' + QgsDxfExport.DxfPolylineFlag.ContinuousPattern.__doc__
+# --
diff --git a/python/core/auto_generated/dxf/qgsdxfexport.sip.in b/python/core/auto_generated/dxf/qgsdxfexport.sip.in
@@ -13,6 +13,7 @@
 
 
 
+
 class QgsDxfExport
 {
 
@@ -91,6 +92,21 @@ unique value.
       Undefined
     };
 
+    enum class DxfPolylineFlag
+    {
+      Closed,
+      Curve,
+      Spline,
+      Is3DPolyline,
+      Is3DPolygonMesh,
+      PolygonMesh,
+      PolyfaceMesh,
+      ContinuousPattern,
+    };
+
+    typedef QFlags<QgsDxfExport::DxfPolylineFlag> DxfPolylineFlags;
+
+
     QgsDxfExport();
 %Docstring
 Constructor for QgsDxfExport.
diff --git a/src/core/dxf/qgsdxfexport.cpp b/src/core/dxf/qgsdxfexport.cpp
@@ -1097,7 +1097,17 @@ void QgsDxfExport::writePolyline( const QgsCurve &curve, const QString &layer, c
     writeGroup( color );
 
     writeGroup( 90, points.size() );
-    writeGroup( 70, ( curve.isClosed() ? 1 : 0 ) | ( curve.hasCurvedSegments() ? 2 : 0 ) );
+    QgsDxfExport::DxfPolylineFlags polylineFlags;
+    if ( curve.isClosed() )
+      polylineFlags.setFlag( QgsDxfExport::DxfPolylineFlag::Closed );
+    if ( curve.hasCurvedSegments() )
+      polylineFlags.setFlag( QgsDxfExport::DxfPolylineFlag::Curve );
+
+    // Might need to conditional once this feature is implemented
+    //   https://github.com/qgis/QGIS/issues/32468
+    polylineFlags.setFlag( QgsDxfExport::DxfPolylineFlag::ContinuousPattern );
+
+    writeGroup( 70, static_cast<int>( polylineFlags ) );
     writeGroup( 43, width );
 
     for ( int i = 0; i < points.size(); i++ )
diff --git a/src/core/dxf/qgsdxfexport.h b/src/core/dxf/qgsdxfexport.h
@@ -49,6 +49,7 @@ namespace pal // SIP_SKIP
   class LabelPosition;
 }
 
+
 /**
  * \ingroup core
  * \class QgsDxfExport
@@ -142,6 +143,20 @@ class CORE_EXPORT QgsDxfExport
       Undefined = 9999 //!< Undefined
     };
 
+    enum class DxfPolylineFlag : int
+    {
+      Closed = 1, //!< This is a closed polyline (or a polygon mesh closed in the M direction)
+      Curve = 2, //!< Curve-fit vertices have been added
+      Spline = 4, //! < Spline-fit vertices have been added
+      Is3DPolyline = 8, //!< This is a 3D polyline
+      Is3DPolygonMesh = 16, //!< This is a 3D polygon mesh
+      PolygonMesh = 32, //!< The polygon mesh is closed in the N direction
+      PolyfaceMesh = 64, //!< The polyline is a polyface mesh
+      ContinuousPattern = 128, //!< The linetype pattern is generated continuously around the vertices of this polyline
+    };
+
+    Q_DECLARE_FLAGS( DxfPolylineFlags, DxfPolylineFlag )
+
     /**
      * Constructor for QgsDxfExport.
      */
