问题
I am implementing a Custom QQuickItem which should be able to make a lineplot (x vs y). For performance reasons I did this using QSGNodes. I wonder what is the best way to implement the Text-Labels for the x-ticks (they should get set automatically according to the data range).
Should I use a QQuickPaintedItem or is there a way to do it via the QQuickItem?
Or is it possible to dynamically create text qml types ( http://doc.qt.io/qt-5/qml-qtquick-text.html) in my c++ file?
回答1:
Don't over-complicate things by reinventing wheels. QML already has a Text type.
There is a downside - the decision to not have a public API to use the QML types from C++ in their C++ form. And I would not recommend creating QML objects from C++, it is just counterproductive.
Which means that your custom QML type will not be implemented purely in C++, you can implement the "core" stuff in C++ and still compose the complete type on the QML side, where you also get to use bindings, anchors, models, positioners, dynamic scoping and all that good stuff that is hard to do in C++.
This is not uncommon, lots of the stock QML controls are implemented this way - an abstract C++ core exposed to QML, where it is finished into a complete control in QML syntax.
来源：https://stackoverflow.com/questions/49150374/text-in-custom-qquickitem