Using ActiveX controls and dumpcpp

hello:
I get a activex controls (.OCX file) from manufacturer, this active controls can access a PCI card. I want to build a GUI to control this card. I use dumpcpp to create a "dospotpc.h" and "dospotpc.cpp" file:

dumpcpp {74676A0F-BB65-48A0-8044-F453692E9A8A} -o dospotpc

in file "dospotpc.h"

Code:

---

/****************************************************************************
**
** Namespace DOSPOTPCLib generated by dumpcpp from type library
** C:\Program Files\DoSpotPC.OCX\DoSpotPC.ocx
**
****************************************************************************/
 
#ifndef QAX_DUMPCPP_DOSPOTPCLIB_H
#define QAX_DUMPCPP_DOSPOTPCLIB_H
 
// Define this symbol to __declspec(dllexport) or __declspec(dllimport)
#ifndef DOSPOTPCLIB_EXPORT
#define DOSPOTPCLIB_EXPORT
#endif
 
#include <qaxobject.h>
#include <qaxwidget.h>
#include <qdatetime.h>
#include <qpixmap.h>
 
struct IDispatch;
 
 
// Referenced namespace
 
namespace DOSPOTPCLib {
 
 
class DOSPOTPCLIB_EXPORT _DDoSpotPC : public QAxObject
{
public:
    _DDoSpotPC(IDispatch *subobject = 0, QAxObject *parent = 0)
    : QAxObject((IUnknown*)subobject, parent)
    {
        internalRelease();
    }
 
    /*
    Method AboutBox
 
    For more information, see help context 0 in C:\Program Files\DoSpotPC.OCX\DoSpotPC.hlp.
    */
    inline void AboutBox();
 
    /*
    Method doGetDetectorsName
 
    For more information, see help context 0 in C:\Program Files\DoSpotPC.OCX\DoSpotPC.hlp.
    */
    inline int doGetDetectorsName(int numDev, QString& DetSN1, QString& DetSN2);
 
    /*
    Method doGetDeviceNumber
 
    For more information, see help context 0 in C:\Program Files\DoSpotPC.OCX\DoSpotPC.hlp.
    */
    inline int doGetDeviceNumber(int Hardware, int& numDev);
 
    /*
    Method doGetMeasureData
 
    For more information, see help context 0 in C:\Program Files\DoSpotPC.OCX\DoSpotPC.hlp.
    */
    inline int doGetMeasureData(int numDev, QVariant& Xo, QVariant& Yo, QVariant& Po);
 
    /*
    Method doGetMeasureDataEx
 
    For more information, see help context 0 in C:\Program Files\DoSpotPC.OCX\DoSpotPC.hlp.
    */
    inline int doGetMeasureDataEx(int numDev, double& Xo, double& Yo, double& Po);
 
    /*
    Method doGetQuadPower
 
    For more information, see help context 0 in C:\Program Files\DoSpotPC.OCX\DoSpotPC.hlp.
    */
    inline int doGetQuadPower(int numDev, QVariant& PQ1, QVariant& PQ2);
 
    /*
    Method doSetHardware
 
    For more information, see help context 0 in C:\Program Files\DoSpotPC.OCX\DoSpotPC.hlp.
    */
    inline int doSetHardware(int Hardware, int numDev);
 
    /*
    Method doSetSystemType
 
    For more information, see help context 0 in C:\Program Files\DoSpotPC.OCX\DoSpotPC.hlp.
    */
    inline void doSetSystemType(int AppName);
 
    /*
    Method doSetWavelength
 
    For more information, see help context 0 in C:\Program Files\DoSpotPC.OCX\DoSpotPC.hlp.
    */
    inline int doSetWavelength(int numDev, int Channel, int Wave);
 
// meta object functions
    static const QMetaObject staticMetaObject;
    virtual const QMetaObject *metaObject() const { return &staticMetaObject; }
    virtual void *qt_metacast(const char *);
};
 
// skipping event interface _DDoSpotPCEvents
 
// Actual coclasses
class DOSPOTPCLIB_EXPORT DoSpotPC : public QAxWidget
{
public:
    DoSpotPC(QWidget *parent = 0, Qt::WindowFlags f = 0)
    : QAxWidget(parent, f)
    {
        setControl("{74676a0f-bb65-48a0-8044-f453692e9a8a}");
    }
 
    /*
    Method AboutBox
 
    For more information, see help context 0 in C:\Program Files\DoSpotPC.OCX\DoSpotPC.hlp.
    */
    inline void AboutBox();
 
    /*
    Method doGetDetectorsName
 
    For more information, see help context 0 in C:\Program Files\DoSpotPC.OCX\DoSpotPC.hlp.
    */
    inline int doGetDetectorsName(int numDev, QString& DetSN1, QString& DetSN2);
 
    /*
    Method doGetDeviceNumber
 
    For more information, see help context 0 in C:\Program Files\DoSpotPC.OCX\DoSpotPC.hlp.
    */
    inline int doGetDeviceNumber(int Hardware, int& numDev);
 
    /*
    Method doGetMeasureData
 
    For more information, see help context 0 in C:\Program Files\DoSpotPC.OCX\DoSpotPC.hlp.
    */
    inline int doGetMeasureData(int numDev, QVariant& Xo, QVariant& Yo, QVariant& Po);
 
    /*
    Method doGetMeasureDataEx
 
    For more information, see help context 0 in C:\Program Files\DoSpotPC.OCX\DoSpotPC.hlp.
    */
    inline int doGetMeasureDataEx(int numDev, double& Xo, double& Yo, double& Po);
 
    /*
    Method doGetQuadPower
 
    For more information, see help context 0 in C:\Program Files\DoSpotPC.OCX\DoSpotPC.hlp.
    */
    inline int doGetQuadPower(int numDev, QVariant& PQ1, QVariant& PQ2);
 
    /*
    Method doSetHardware
 
    For more information, see help context 0 in C:\Program Files\DoSpotPC.OCX\DoSpotPC.hlp.
    */
    inline int doSetHardware(int Hardware, int numDev);
 
    /*
    Method doSetSystemType
 
    For more information, see help context 0 in C:\Program Files\DoSpotPC.OCX\DoSpotPC.hlp.
    */
    inline void doSetSystemType(int AppName);
 
    /*
    Method doSetWavelength
 
    For more information, see help context 0 in C:\Program Files\DoSpotPC.OCX\DoSpotPC.hlp.
    */
    inline int doSetWavelength(int numDev, int Channel, int Wave);
 
// meta object functions
    static const QMetaObject staticMetaObject;
    virtual const QMetaObject *metaObject() const { return &staticMetaObject; }
    virtual void *qt_metacast(const char *);
};
...................................

---

in class "DoSpotPC", this member function prototype:

Code:

---

inline int doGetDeviceNumber(int Hardware, int& numDev);

---

is not correct, according to the manual, this member function prototype should be

Code:

---

short doGetDeviceNumber(short Hardware, short* numDev);

---

I get stuck at here, the parameter 1 type should be a pointer. if I use this function like this:

Code:

---

int devNum;
s->doGetDeviceNumber(1, devNum);

---

I will get following error:
"Error calling IDispatch member: Type mismatch in parameter 1"

please give me some help, thx.

How is this related to Qt?
If I understand correctly, your problems have to do with OCX interface, not with the QAxObject...

hello:
I try to use "dynamicCall" function, too, like following code:

Code:

---

QAxWidget *doSpot;
    doSpot = new QAxWidget(this);
    doSpot->setControl("{74676A0F-BB65-48A0-8044-F453692E9A8A}");
 
    QString str1 = "doSetSystemType(int)";
    QList<QVariant> vars1;
    QVariant res1;
    vars1 << 0;
    res1 = doSpot->dynamicCall(str1.toLatin1(), vars1);
    qDebug() << res1 << vars1[0];
 
    QString str2 = "doGetDeviceNumber(int, int&)";
    QList<QVariant> vars2;
    QVariant res2;
    vars2 << 1 << "";
    res2 = doSpot->dynamicCall(str2.toLatin1(), vars2);
    qDebug() << res2 << vars2[0] << vars2[1];
 
    QString str3 = "doSetHardware(int, int)";
    QList<QVariant> vars3;
    QVariant res3;
    vars3 << 1 << 2;
    res3 = doSpot->dynamicCall(str3.toLatin1(), vars3);
    qDebug() << res3 << vars3[0] << vars3[1];
 
    QString str4 = "doSetWavelength(int, int, int)";
    QList<QVariant> vars4;
    QVariant res4;
    vars4 << 1 << 1 << 633;
    res4 = doSpot->dynamicCall(str4.toLatin1(), vars4);
    qDebug() << res4 << vars4[0] << vars4[1] << vars4[2];
    vars4.clear();
    vars4 << 1 << 2 << 633;
    res4 = doSpot->dynamicCall(str4.toLatin1(), vars4);
    qDebug() << res4 << vars4[0] << vars4[1] << vars4[2];
    vars4.clear();
    vars4 << 2 << 1 << 633;
    res4 = doSpot->dynamicCall(str4.toLatin1(), vars4);
    qDebug() << res4 << vars4[0] << vars4[1] << vars4[2];
    vars4.clear();
    vars4 << 2 << 2 << 633;
    res4 = doSpot->dynamicCall(str4.toLatin1(), vars4);
    qDebug() << res4 << vars4[0] << vars4[1] << vars4[2];

---

it is fine. then, I want to get some values through function "doGetMeasureDataEx", I have a problem. following code and mention is this function prototype describe in manual:

Code:

---

short doGetMeasureDataEx(float* measuredData);

---

my problem is on argument "measuredData", the argument is a array of two element returned, ie, I can get 2 measured data at array "measuredData". . then I use dynamicCall as following code:

Code:

---

QString str5 = "doGetMeasureDataEx(double&)";
    QVariant vars5 = 0.0;
    QVariant res5;
    res5 = doSpot->dynamicCall(str5.toLatin1(), vars5);

---

I only can get 1 data, how to get this two data, please give me some help, thx.

My guess is that you have to use this variant for dynamicCall():
http://doc.qt.nokia.com/latest/qaxba...#dynamicCall-2

to high_flyer:
thank for your answer.

I just simplify this function prototype to explain my question, this actual prototype is

Code:

---

short doGetMeasureDataEx(short iDev, float* x, float* y, float* p);

---

the argument iDev is in-parameter. these arguments (x, y, p) are out-parameter and two element array, so, I should get 6 measured data totally.

and in my qt' test program, the getting data code is :

Code:

---

QString str5 = "doGetMeasureDataEx(int, double&, double&, double&)";
    QList<QVariant> vars5;
    QVariant res5;
    vars5 << 1 << 0.0 << 0.0 << 0.0 ;
    res5 = doSpot->dynamicCall(str5.toLatin1(), vars5);

---

so, vars[1], vars[2] and vars[3] is first element data of x ,y and p, respectively. I can't get second data. please help me to solve this problem, thx.

Did you read my last answer?

to high_flyer:
did you mean that I have to use this function "QVariant QAxBase::dynamicCall ( const char * function, QList<QVariant> & vars )"?, in my last post, I have used this function for dynamicCall() as follwing:

Code:

---

QString str5 = "doGetMeasureDataEx(int, double&, double&, double&)";
    QList<QVariant> vars5;
    QVariant res5;
    vars5 << 1 << 0.0 << 0.0 << 0.0 ;
    res5 = doSpot->dynamicCall(str5.toLatin1(), vars5);

---

I don't understand your meaning completely, please give me more explanation. thank for your answer.

Sorry, for some reason my brain saw 'res5' instead of 'vars5'.

So do you mean 'vars5' has only one element in the list after the call?

to high_flyer:
following code is the function prototype described in manual:

"short doGetMeasureDataEx(short iDev, float* x, float* y, float* p);"

the argument 0 ("iDev") is in-parameter. Arguments 1, 2 and 3("x", "y", "p") are out-parameter, two element array and pointer, so, I should get 6 values totally. these 6 values are stored in x[0], x[1], y[0], y[1], p[0], p[1].

and in my qt' test program, after calling "dynamicCall()" in my machine, the vars5 is: vars5[0] = 1, vars5[1] = -12.143, vars5[2] = -0.973, vars5[3] = 0.812. ie, vars5[0] = iDev, vars5[1] = x[0], vars5[2] = y[0], vars5[3] = p[0]. I can't get x[1], y[1], p[1] values.

the Qvariant can be used as a pointer? thank for your answer.

Ah... now I see that you didn't use the correct function signature - you have pointers as params but you were using references...
You used:

Code:

---

QString str5 = "doGetMeasureDataEx(int, double&, double&, double&)";

---

Where as the function signature is:

Code:

---

short doGetMeasureDataEx(short iDev, float* x, float* y, float* p);

---

So no wonder it doesn't work.

What you can try, is cast the double pointer addresses to long, set that as your QVariable, and then cast back after the call:

Code:

---

double var1 = 0.0;
double var2 = 0.0;
...
QVariant pDouble1 = (long)&var1;
QVariant pDouble2 = (long)&var2;
..
QList<QVariant> varList;
varList << pDouble1 << pDouble 2.... ;
res5 = doSpot->dynamicCall(str5.toLatin1(), varList ); //use the correct signature with pointers!!
double *pVar = varList.at(0);
var1 = *pVar;

---

I don't know if this will work, this is just something I would try.

hello:
I use dumpcpp to create a "dospotpc.h" and "dospotpc.cpp" file before: "dumpcpp {74676A0F-BB65-48A0-8044-F453692E9A8A} -o dospotpc"
In file "dospotpc.h", this function prototype is:

Code:

---

inline int doGetMeasureDataEx(int numDev, double& Xo, double& Yo, double& Po);

---

so, I use this code to call "dynamicCall()" function:

Code:

---

QString str5 = "doGetMeasureDataEx(int, double&, double&, double&)";

---

I don't know why the function argument transform from pointer type to reference type.

it doesn't seem to work successfully. I try this and get some errors while compile.