void CRecordView::OnUpdateRecordLast(CCmdUI* pCmdUI)
{
CRecordset* prs = OnGetRecordset();
// enable if opened, can scroll,
pCmdUI->Enable(prs->IsOpen() && prs->CanScroll() &&
// >= 1 records present and not already on last record
!(prs->IsEOF() && prs->IsBOF()) && !IsOnLastRecord());
}
void CRecordView::OnUpdateRecordNext(CCmdUI* pCmdUI)
{
CRecordset* prs = OnGetRecordset();
// enable if opened and >= 1 records present
pCmdUI->Enable(prs->IsOpen() && !(prs->IsEOF() && prs->IsBOF())
// and not already on last record
&& !IsOnLastRecord());
}
BOOL CRecordView::OnMove(UINT nIDMoveCommand)
{
CRecordset* pSet = OnGetRecordset();
if (pSet->CanUpdate() && !pSet->IsDeleted())
{
pSet->Edit();
if (!UpdateData())
return TRUE;
pSet->Update();
}
switch (nIDMoveCommand)
{
case ID_RECORD_PREV:
pSet->MovePrev();
if (!pSet->IsBOF())
break;
case ID_RECORD_FIRST:
pSet->MoveFirst();
break;
case ID_RECORD_NEXT:
pSet->MoveNext();
if (!pSet->IsEOF())
break;
if (!pSet->CanScroll())
{
// clear out screen since we're sitting on EOF
pSet->SetFieldNull(NULL);
break;
}
case ID_RECORD_LAST:
pSet->MoveLast();
break;
default:
// Unexpected case value
ASSERT(FALSE);
}
// Show results of move operation
UpdateData(FALSE);
return TRUE;
}