syntax guidance

CharlesHuff

in the past I declared multiple instances of SysManager inside each part of Qt 4 that called on_button_clicked()... I think that was wrong usage. Please see example code:

std::vector<std::string> comHubPorts;
size_t portCount = 0;
QString myStr;
QString myStr2;
QString myStr3;
sFnd::SysManager *myMgr;
sFnd::IPort *iPort;
sFnd::INode *theNode;

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Dialog w;
    w.show();
    
    myMgr = sFnd::SysManager::Instance();
    myMgr->sFnd::SysManager::FindComHubPorts(comHubPorts);
    myStr =  QString::number(comHubPorts.size());
    qInfo() << "Found:" << myStr;
    myStr2 = comHubPorts[0].c_str();
    qInfo() << "Device: " << myStr2;
    myMgr->ComHubPort(0, comHubPorts[0].c_str());
    myMgr->PortsOpen(0);
    iPort = &myMgr->Ports(0);
    qDebug() << "NetNumber: " << QString::number(iPort->NetNumber());
    qDebug() << "OpenState: " << QString::number(iPort->OpenState());
    qDebug() << "Node: " << QString::number(iPort->NodeCount());

    //myMgr->PortsClose(); I want to do this in void Dialog::on_pushButton_clicked()

    return a.exec();
}

SGaist

Hi,

You SysManager seem to be a singleton so why declare all these static variables ?

CharlesHuff

do you mean the code before main()? It's my ignorant attempt to make SysManager *myMgr variables "Public" or at least usable outside of the main() function. SysManager is from sFoundation20.so library. Their examples do not seem to be for c++ and I am struggling to discover how to use the library with Qt 6 creator...

Thanks,

SGaist

@CharlesHuff said in syntax guidance:

sFoundation20.so

Where does that library come from ?

From the looks of it, you need to take a step back and rethink your application design. What should it do ?

CharlesHuff

it is their hello world! it opens a com port and assigns a node on the port to a servo motor. www.teknic.com is the address. you have to create an account to get all the manuals. the code is working and outputting results that I can see in qDebug() comments. I don't want to only use the code from main() function but also from buttons, ect....

SGaist

Then if it is a C library, you should create a proper object to encapsulate its use through your application.

CharlesHuff

@SGaist said in syntax guidance:

application

I have only their examples to look at. I googled encapsulation in c++ and it looks like it is done with Classes in c++ so I will work on understanding that. There seems to be an Axis class. I have only one motor = one Axis so maybe I can figure it out.

Thanks,
Charles

mchinand

One way you can do it is to sub-class QMainWindow and have an instance of SysManager be a member of your MainWindow class. Then, create slots that call the various SysManager methods. Connect your buttons' clicked signals to these slots.