How to send an array of double into qt activex component?

Mark57

I write activex component (using Qt). How to send an array of double into qt activex component from с++ mfc-application (or с++ winapi-application) ? If you do through QByteArray, there is a type mismatch error . Through QVariant not work, sent an empty array.

There are two ways. Both ways do not work.

through QByteArray

@void MyQtActivex::setData(QByteArray &_data, int len)
{
float* mydata = (float*)(_data.constData());
.....
}@

@void CmsvctestDlg::OnBnClickedButton1()
{
SAFEARRAY pSA;
SAFEARRAYBOUND sab[1];
sab[0].lLbound = 0;
sab[0].cElements = len4;

pSA = SafeArrayCreate (VT_ARRAY | VT_UI1, 1, sab);
SafeArrayAccessData (pSA, (void **) &pData);

memcpy (pData, (BYTE*)_data, len*4);

_myQtActivex.setData((SAFEARRAY ** )pSA->pvData, len);

}@

through QVariant

@void MyQtActivex::setData(QVariant& psaArray, int _len)
{
VARIANT newYVals;
SAFEARRAY* psaYVals;
QByteArray _type("double");
bool _ok = QVariantToVARIANT(psaArray, newYVals, _type);
....
....
}@

@void CmsvctestDlg::OnBnClickedButton1()
{
COleSafeArray arry;
arry.CreateOneDim(VT_R8, len);
long i;
for(i=0; i<len; i++)
{
double _z = oscp_data_32f[i];
arry.PutElement(&i, &_z);
}

_myQtActivex.setData( COleVariant(arry), len);

}@