Thread: Copy Constructor with classmember CArray

I keep getting C2248 error messages in Visual Studio 2005. I have solved previous problems with this error, by creating an copy constructor for CMapLayer. The program is displaying and changing an SVG map. I have CMapLegend, CMapCategory and CMapLayer. These classes represent a legend for a map. The layers of the map are divided into categories.

For drawing the map I have:

Code:

for(int iCount1 = 0; iCount1 < Categories.GetSize(); iCount1++) {  		
  CreateCategory(Categories.GetAt(iCount1));    		
  for(int   iCount2 = 0; iCount2 < Categories.GetAt(iCount1).GetNumberOfLayers(); iCount2++) {  			
    CreateLayer(Categories.GetAt(iCount1).GetLayerByIndex(iCount2));  		
  }  	
}

inside CMapLegend::CreateLegend();

Code:

class CMapLegend  
{  
public:  	
  CMapLegend(void);  	
  ~CMapLegend(void);  	
  void CreateLegend(void);  	
  void SetVisible(void);  	
  void SetInvisible(void); 
private:  	
  eSVG::CActiveXeSVG svgControl;  	
  CArray<CMapCategory, CMapCategory> Categories;
  CString sSvgId;	
  eSVG::CElement CreateLayer(CMapLayer& mapLayer); 
  eSVG::CElement CreateCategory(CMapCategory& mapCategory);  
};

Code:

class CMapLayer  
{  
public:	  	
  CMapLayer(CString sName, CString sSvgId, CString sIconRef, bool bDisplay);	  	
  CMapLayer(void);  	
  CMapLayer(const CMapLayer& mapLayer);  
  CMapLayer operator=(const CMapLayer& mapLayer);  	
  ~CMapLayer(void);  	
  void SetVisible(void);  	
  void SetInvisible(void);  	
  CString GetName(void);  	
  CString GetSvgId(void);  	
  CString GetIconRef(void);  	
  bool GetDisplay(void);  
protected:  	
  eSVG::CActiveXeSVG svgControl;  	 
  CString sName;  	
  CString sSvgId;  	
  CString sIconRef;  	
  bool bDisplay;		 
};

Code:

class CMapCategory : public CMapLayer 
{ 
public:  	
  CMapCategory(void);  	
  CMapCategory(const CMapCategory& mapCategory);	  	
  ~CMapCategory(void);  	
  CMapCategory operator =(const CMapCategory& mapCategory);  	
  void SetLayersVisible(void);  	
  void SetLayersInvisible(void);  	
  void AddLayer(const CMapLayer& mapLayer);  	
  CMapLayer GetLayerById(void);	  	
  int GetNumberOfLayers(void);  	
  CMapLayer GetLayerByIndex(int index);  
private:  	
  bool bExpanded;	  	
  CArray<CMapLayer, CMapLayer> Layers;	  
};

Error 1 error C2248: 'CObject:perator =' : cannot access private member declared in class 'CObject' C:\Program Files\Microsoft Visual Studio 8\VC\ce\atlmfc\include\afxtempl.h 324

The error occurs in CObject of MFC. GetAt is a CArray method for getting an object inside the CArray at a given position.

When I uncomment the CArray lines in following code: the error doesn't occur, so those are the lines:

Code:

CMapCategory::CMapCategory(const CMapCategory& mapCategory)  {  	
  this->sIconRef  = mapCategory.sIconRef;  	
  this->sName     = mapCategory.sName;  	
  this->sSvgId    = mapCategory.sSvgId;  	
  this->bDisplay  = mapCategory.bDisplay;  	
  this->bExpanded = mapCategory.bExpanded;  	
  //this->Layers    = mapCategory.Layers;	  
}    
CMapCategory CMapCategory::operator =(const CMapCategory& mapCategory)  {  	
  CMapCategory newCategory;  	
  newCategory.sIconRef  = mapCategory.sIconRef;  	  
  newCategory.sName     = mapCategory.sName;  	
  newCategory.sSvgId    = mapCategory.sSvgId;  	
  newCategory.bDisplay  = mapCategory.bDisplay;  
  newCategory.bExpanded = mapCategory.bExpanded;  
  //newCategory.Layers    = mapCategory.Layers;  
  return newCategory;  }

Layers is a CArray<CMapLayers, CMapLayers>.

You are not allowed to copy a CArray like that. Use the Copy member function instead.