How to access C++ enum from QML?

Question

class StyleClass : public QObject {
public:
    typedef enum
        {
            STYLE_RADIAL,
            STYLE_ENVELOPE,
            STYLE_FILLED
        }  Styl         


        

Answer 1

All this solutions can't enabled used this enum-class as parameter for signal/slot. This code compile, but not work in QML:

class DataEmitter : public QObject
{
    Q_OBJECT

public:
    ...
signals:
    void setStyle(StyleClass::EnStyle style);
}

...

emit setStyle(StyleClass.STYLE_RADIAL);

QML-part:

Connections {
    target: dataEmitter
    onSetStyle: {
         myObject.style=style
    }
}

And this code generate runtime error, as this:

IndicatorArea.qml:124: Error: Cannot assign [undefined] to int

For this code working, you must additional registry Qt metaobject type:

qRegisterMetaType("StyleClass.EnStyle");

More details written here: https://webhamster.ru/mytetrashare/index/mtb0/1535044840rbtgvfmjys (rus)