LINE.CPP

// Line.cpp : Implementation of CLine 
#include "stdafx.h" 
#include "GraphObj.h" 
#include "Line.h" 
 
///////////////////////////////////////////////////////////////////////////// 
// CLine 
 
STDMETHODIMP CLine::InterfaceSupportsErrorInfo(REFIID riid) 
{ 
static const IID* arr[] =  
{ 
&IID_ILine, 
}; 
for (int i=0;i<sizeof(arr)/sizeof(arr[0]);i++) 
{ 
if (InlineIsEqualGUID(*arr[i],riid)) 
return S_OK; 
} 
return S_FALSE; 
} 
 
STDMETHODIMP CLine::get_x1(long * pVal) 
{ 
*pVal = m_Line.x1; 
return S_OK; 
} 
 
STDMETHODIMP CLine::put_x1(long newVal) 
{ 
m_Line.x1 = newVal; 
 
return S_OK; 
} 
 
STDMETHODIMP CLine::get_y1(long * pVal) 
{ 
*pVal = m_Line.y1; 
 
return S_OK; 
} 
 
STDMETHODIMP CLine::put_y1(long newVal) 
{ 
m_Line.y1 = newVal; 
 
return S_OK; 
} 
 
STDMETHODIMP CLine::get_x2(long * pVal) 
{ 
*pVal = m_Line.x2; 
 
return S_OK; 
} 
 
STDMETHODIMP CLine::put_x2(long newVal) 
{ 
m_Line.x2 = newVal; 
 
return S_OK; 
} 
 
STDMETHODIMP CLine::get_y2(long * pVal) 
{ 
*pVal = m_Line.y2; 
 
return S_OK; 
} 
 
STDMETHODIMP CLine::put_y2(long newVal) 
{ 
m_Line.y2 = newVal; 
 
return S_OK; 
} 
 
STDMETHODIMP CLine::IMyPersistStreamImpl_Load(LPSTREAM pIStream) 
{ 
    ULONG           cb; 
    HRESULT         hr; 
 
    if (NULL==pIStream) 
        return ResultFromScode(E_POINTER); 
 
    hr=pIStream->Read(&m_Line, sizeof(LINEDATA), &cb); 
    if (FAILED(hr) || sizeof(LINEDATA) != cb) { 
pIStream->Release(); 
        return hr; 
    } 
 
return NOERROR; 
} 
 
 
 
STDMETHODIMP CLine::IMyPersistStreamImpl_Save(LPSTREAM pIStream, BOOL /* fClearDirty */) 
{ 
    ULONG           cb; 
    HRESULT         hr; 
 
    if (NULL==pIStream) 
        return ResultFromScode(E_POINTER); 
 
 
    hr=pIStream->Write(&m_Line, (ULONG)sizeof(LINEDATA), &cb); 
 
    if (FAILED(hr) || sizeof(LINEDATA)!=cb) 
       return ResultFromScode(STG_E_WRITEFAULT); 
 
return NOERROR; 
} 
 
 
STDMETHODIMP CLine::IMyPersistStreamImpl_GetSizeMax(ULARGE_INTEGER FAR* pcbSize) 
{ 
pcbSize->LowPart = (DWORD)(sizeof(LINEDATA)); 
pcbSize->HighPart = 0L; 
return NOERROR; 
}