issue 0001469: OpenSCAD import more than one dxf layer

 with the same name

remove all imported dxf geometry
change dxf import object naming to avoid conflicts with group names

src/Mod/OpenSCAD/OpenSCAD2Dgeom.py

@@ -459,31 +459,29 @@ def median(v1,v2):
     print newedges
     return Part.Wire(newedges)
 
-dxfcache = {}
 def importDXFface(filename,layer=None,doc=None):
     import FreeCAD,importDXF
     doc = doc or FreeCAD.activeDocument()
-    global dxfcache
-    layers=dxfcache.get(id(doc),[])
-    if layers:
-        try:
-            groupobj=[go for go in layers if (not layer) or go.Label == layer]
-        except:
-            groupobj= None
-    else:
-        groupobj= None
-    if not groupobj:
-        layers = importDXF.processdxf(doc,filename) or importDXF.layers
-        dxfcache[id(doc)] = layers[:]
-        for l in layers:
-            if FreeCAD.GuiUp:
-                for o in l.Group:
-                    o.ViewObject.hide()
-                l.ViewObject.hide()
-        groupobj=[go for go in layers if (not layer) or go.Label == layer]
+    layers = importDXF.processdxf(doc,filename) or importDXF.layers
+    for l in layers:
+        if FreeCAD.GuiUp:
+            for o in l.Group:
+                o.ViewObject.hide()
+            l.ViewObject.hide()
+    groupobj=[go for go in layers if (not layer) or go.Label == layer]
     edges=[]
     if not groupobj:
         raise ValueError, 'import of layer %s failed' % layer
     for shapeobj in groupobj[0].Group:
         edges.extend(shapeobj.Shape.Edges)
-    return edgestofaces(edges)
+    faces = edgestofaces(edges)
+        # in order to allow multiple import with the same layer name
+        # we need to remove used objects from the layer group
+        #shapeobj.Document.removeObject(shapeobj.Name)
+    #groupobj[0].Document.removeObject(groupobj[0].Name)
+    for layer in layers: #remove everything that has been imported
+        layer.removeObjectsFromDocument()
+        #for obj in layer.Group:
+        #    obj.Document.removeObject(obj.Name)
+        layer.Document.removeObject(layer.Name)
+    return faces

src/Mod/OpenSCAD/importCSG.py

@@ -710,12 +710,10 @@ def processDXF(fname,layer):
     if printverbose: print "PathName : "+pathName
     dxfname = fname+'.dxf'
     filename = os.path.join(pathName,dxfname)
+    shortname = os.path.split(fname)[1]
     if printverbose: print "DXF Full path : "+filename
     face = importDXFface(filename,layer,doc)
-    #obj=doc.addObject("Part::FeaturePython",'import_dxf_%s_%s'%(objname,layera))
-    obj=doc.addObject('Part::Feature',layer or "dxf")
-    #ImportObject(obj,groupobj[0]) #This object is not mutable from the GUI
-    #ViewProviderTree(obj.ViewObject)
+    obj=doc.addObject('Part::Feature','dxf_%s_%s' % (shortname,layer or "all"))
     obj.Shape=face
     if printverbose: print "DXF Diagnostics"
     if printverbose: print obj.Shape.ShapeType