Set some kind of a property to the item

[Vasya]

Hi,

I'm trying to find a way to set some kind of a property for a plotted item where I could keep information about the item.
For example I plot 10 curves. 7 of them should be signed as "good", and the 3 rest should be "bad". So this would allow me to sort these 10 items after getting them from QwtPlot widget like:

QwtPlotItemList qwtItmList = QwtPlotWidget->itemList();
for(int i = 0; i < qwtItmList.size(); i++){
    QString prop = qwtItmList[i].MyProperty();
    if (prop == "good){
        ...
    } else if (prop == "good) {
        ...
    }
}

QwtPlotItemList qwtItmList = QwtPlotWidget->itemList();
for(int i = 0; i < qwtItmList.size(); i++){
    QString prop = qwtItmList[i].MyProperty();
    if (prop == "good){
        ...
    } else if (prop == "good) {
        ...
    }
}

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[Uwe]

I will add the Q_GADGET keyword to all plot items. Q_GADGET is available since some early Qt5 version ( need to find out which exactly ) - always wanted to do this.

Does this help ?

Uwe

[Vasya]

I didnt work with Q_GADGET yet but as I understood from description this would allow to use such function like setProperty(const char *name, const QVariant &value) and return the QVariant value with property(const char *name) const for plotted items.

I think that would be great