CGdiObject* PASCAL CGdiObject::FromHandle(HGDIOBJ h)
{
CHandleMap* pMap = afxMapHGDIOBJ(TRUE); //create map if not exist
ASSERT(pMap != NULL);
CGdiObject* pObject = (CGdiObject*)pMap->FromHandle(h);
ASSERT(pObject == NULL || pObject->m_hObject == h);
return pObject;
}
BOOL CGdiObject::Attach(HGDIOBJ hObject)
{
ASSERT(m_hObject == NULL); // only attach once, detach on destroy
if (hObject == NULL)
return FALSE;
CHandleMap* pMap = afxMapHGDIOBJ(TRUE); // create map if not exist
ASSERT(pMap != NULL);
pMap->SetPermanent(m_hObject = hObject, this);
return TRUE;
}
HGDIOBJ CGdiObject::Detach()
{
HGDIOBJ hObject = m_hObject;
if (hObject != NULL)
{
CHandleMap* pMap = afxMapHGDIOBJ(); // don't create if not exist
if (pMap != NULL)
pMap->RemoveHandle(m_hObject);
}
m_hObject = NULL;
return hObject;
}
void PASCAL CGdiObject::DeleteTempMap()
{
CHandleMap* pMap = afxMapHGDIOBJ();
if (pMap != NULL)
pMap->DeleteTemp();
}
