QML function calls from Android

Why?

Cause - i.e why is it needed?

• I want to be able to call QML functions from Android, either to provide data to the QML view, or to trigger special behaviors, without having to toggle a property to trigger a QML property change listener.

Customer -  i.e. who needs it?

• Qt Quick for Android users i.e. Android developers bringing Qt Quick 3D rendering engine to their applications

Cruft  - i.e. why it is not needed (counter arguments)?

What?

Definition - i.e what is it?

• Direct QML function calls can be called/invoked from Java or Kotlin code

Demarcation - i.e. it is not?

• TODO

Dependencies -  i.e. it needs?

• TODO

How?

Effort - i.e  how easy or hard does it feel?

• Extend the QtQuickViewContent java class to provide a java -> native function chain to call a function with N arguments.
• Extend the qandroidquickviewembedding native code to support above, and then call the QML function.
• Extend the code generation in ADQT to also generate Java functions that will call the native functions that call QML functions.
• Chain these together, add a test suite.

Estimate - i.e. how big is the amount of work (in calendar time)?

Essential - i.e the add on value it brings? High

When?

Flex i.e. time-bound (like platform or feature freeze) or not is it?

• Qt 6.11 FF in early December

• Force i.e. labor (do we have enough people working on it) capacity?

Fit i.e. does it fit in (like Qt release)?

• Qt 6.11?