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dxfLayerMap.cxx
00001 // Filename: dxfLayerMap.cxx
00002 // Created by:  drose (04May04)
00003 //
00004 ////////////////////////////////////////////////////////////////////
00005 //
00006 // PANDA 3D SOFTWARE
00007 // Copyright (c) Carnegie Mellon University.  All rights reserved.
00008 //
00009 // All use of this software is subject to the terms of the revised BSD
00010 // license.  You should have received a copy of this license along
00011 // with this source code in a file named "LICENSE."
00012 //
00013 ////////////////////////////////////////////////////////////////////
00014 
00015 #include "dxfLayerMap.h"
00016 #include "dxfFile.h"
00017 
00018 ////////////////////////////////////////////////////////////////////
00019 //     Function: DXFLayerMap::get_layer
00020 //       Access: Public
00021 //  Description: Looks up the layer name in the map, and returns a
00022 //               pointer to the associated DXFLayer.  If this is the
00023 //               first time this layer name has been used, creates a
00024 //               new DXFLayer by the given name.  In this case, it
00025 //               calls dxffile->new_layer() to create the layer,
00026 //               allowing user code to override this function to
00027 //               create a specialized time, if desired.
00028 ////////////////////////////////////////////////////////////////////
00029 DXFLayer *DXFLayerMap::
00030 get_layer(const string &name, DXFFile *dxffile) {
00031   iterator lmi;
00032   lmi = find(name);
00033   if (lmi != end()) {
00034     // The layer was already here.
00035     return (*lmi).second;
00036   }
00037 
00038   // Need a new layer.
00039   DXFLayer *layer = dxffile->new_layer(name);
00040   (*this)[name] = layer;
00041 
00042   return layer;
00043 }
00044 
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