QML Bar Chart with live-updating data from C++

[Hedge]

I want to visualize data coming from an Arduino in a Bar Chart and am scratching my head on how to get any data from C++ into the bar chart.

Is there an easy example somewhere? All I could find were outdated or overly complicated.

[p3c0]

Hi @Hedge,
You have following ways to do it:

• Defining QML Types from C++
  In short create a QObject derived class and register it using qmlRegisterType so that it is available in QML.
• Exposing Attributes of C++ Types to QML
  Create a QObject derived class , add some public slots or Q_INVOKABLE functions and make these available by setting that class as a contextProperty.

In both the cases it will be good idea to provide some properties defined as Q_PROPERTY with their respective signals so that QML gets notified on changes in the values of these properties from C++.