Answering my own question...
Pass WaylandCompositor's property - defaultSeat into C++ as QWaylandSeat*.
https://doc.qt.io/archives/qt-5.15/qml-qtwayland-compositor-waylandcompositor.html#defaultSeat-prop
WaylandCompositor
{
id: iCompositor
Component.onCompleted:
{
CppHelper.setDefaultWaylandSeat( iCompositor.defaultSeat );
}
}
Use QWaylandSeat's setKeyboardFocus(), which takes QWaylandSurface*.
https://doc.qt.io/archives/qt-5.15/qwaylandseat.html#setKeyboardFocus
QWaylandSurface* can be found in the onIviSurfaceCreated() as iviSurface. You can pass it into C++.
IviApplication
{
onIviSurfaceCreated:
{
var surfaceArea = iviSurface.iviId === 1337 ? leftArea : rightArea;
var item = chromeComponent.createObject(surfaceArea, { "shellSurface": iviSurface } );
item.handleResized();
// Pass QWaylandSurface* into C++.
CppHelper.registerIviSurface( iviSurface );
}
}
The signal keyboardFocusChanged can be used to observe the change.
https://doc.qt.io/archives/qt-5.15/qwaylandseat.html#keyboardFocusChanged
However, setKeyboardFocus() doesn't work very well. I do get the signal keyboard focus changed, but the focus jump back to the original window if I actually press a keyboard key.
