Composing multiple projects, referencing components

[Phrogz]

Summary: How can I use a QML component from a sub-project in the main project?

I have a project which stitches together components from two other projects, with each sub-project and the project that stitches them together in sub-directories. For example:

.
├── app.pro
├── bar
│   ├── bar.pro
│   ├── bar.qrc
│   ├── main.qml
│   ├── main.cpp
│   └── Bar.qml
├── combiner
│   ├── combiner.pro
│   ├── combiner.qrc
│   ├── main.qml
│   └── main.cpp
└── foo
    ├── foo.pro
    ├── foo.qrc
    ├── main.qml
    ├── main.cpp
    └── Foo.qml

The Foo and Bar apps have a .pro that loads their respective .cpp, which is mostly a wrapper for the main.qml that instantiates a Window to wrap the Foo.qml or Bar.qml class.

My app.pro file references the sub-projects:

TEMPLATE = subdirs
CONFIG += ordered
SUBDIRS = foo bar combiner
app.depends = foo bar combiner

In combiner/main.qml I want to be able to do:

import QtQuick 2.8
import QtQuick.Window 2.2
import ??? // WHAT GOES HERE?
Window {
    Foo { … }
    Bar { … }
}

I've tried import "foo".
I've tried import "../foo".
I've tried putting a qmldir file in the Foo directory with the contents module Foo and using import Foo 1.0.
I clearly don't understand how all the references work, especially with sub-projects.

How can I make foo/Foo.qml available to combiner/main.qml as a Foo component?

[Phrogz]

Update: I tried adding:

engine.addImportPath("foo");
engine.addImportPath("../foo");

to combiner/main.cpp before engine.load(), still no success.

I've also tried adding Foo Foo.qml to foo/qmldir. Still no success.

Ping?

[ODБOï]

Hello,

On this page : http://wiki.qt.io/Developer_Guides

under : Introduction to Application Development with Qt Quick title, there are 3 Links to download
the tuorial, and the 3rd part of that tutorial will answer you question.

LA

[JeTSpice]

I've had a similar problem. The third part of the above linked tutorial is called "Qt Quick Core Principles for Application Development" I looked around that part and a few other parts but could not see a solution. Am I looking in the right place?

[ODБOï]

@JeTSpice Hello, this is not 3rd part, my bad. PART 8 : 8.1 Creating Components and Collecting Modules.
I hope this is what you are looking for.
LA