Using ActiveX controls and dumpcpp

[high_flyer]

Did you read my last answer?

[eli]

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:

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);

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);

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

[high_flyer]

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?

[eli]

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.

[high_flyer]

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:

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

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

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Where as the function signature is:

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

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

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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:

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;

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;

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

[eli]

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:

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

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

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

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

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

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

[eli]

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