QCandlestickSet 未定义 C++ Qt5.15

Question

I'm using Visual Studio 2019 Community x64, Qt version 5.15.2. I have the 'Charts' module installed and selected in Project -> Properties -> Qt Project Settings -> Qt Modules

My code:

#include <QCandlestickSet>

struct Bar
{
    double open, close, high, low;
    qint64 timestamp;

    Bar() : open(0.0), close(0.0), high(0.0), low(0.0), timestamp(0)
    {
    }

    QCandlestickSet * toCandle(void)
    {
        return new QCandlestickSet(this->open, this->high, this->low, this->close, this->timestamp);
    }
};

I am getting the error:

Severity Code Description Project File Line Suppression State Error (active) E0020 identifier "QCandlestickSet" is undefined ProjectName..\Bar.h 27

Any help would be appreciated.

Thank you in advance.

Answer 1

As mentioned in the comments by GM, everything QtChart related is held within a namespace called QtCharts.

Doing any of the following will fix this issue:

using QtCharts::QCandlestickSet;

OR

using namespace QtCharts;

OR

QtCharts::QCandlestickSet * toCandle(void)
{
    return new QtCharts::QCandlestickSet(this->open, this->high, this->low, this->close, this->timestamp);
}

Although the namespace is not mentioned in the page relating to QCandlestickSet, it is mentioned on the QtCharts page