[davidkhess]

It definitely can get messy, but there are some very easy ways to keep your project well structured.

1. Refactor out to separate components a lot.

2. Use the .ui.qml and .qml code behind pattern to separate UI from code.

3. Use singleton QtObjects to create abstract classes that contain any non-UX behavior.

As for graphing, the built in components work pretty well:

https://doc.qt.io/qt-5.10/qtcharts-index.html

As far as QML widgets go, they have improved greatly since they released Quick Controls 2 (a rewrite of the initial set of controls).

https://doc.qt.io/qt-5.10/qtquickcontrols2-index.html

[mappu]

Unlike most of Qt, QtCharts is GPL, not LGPL. You can't avoid the virality by dynamic linking.