dart-qtbindings

This is a proof of concept of Qt bindings for Dart.

The goal is only to showcase the C++ binding generator for Dart, Dartagnan.
There's no intention in creating production ready Qt bindings.

Build

cmake .
cmake --build .

You now have a Qt bindings library: generated/QtDartBindings/libQtDartBindings.so These are the C wrappers produced by our dart generator.

Run

libQtDartBindings.so needs to be in your library path, so edit PATH (Windows), LD_LIBRARY_PATH (Linux) or DYLD_LIBRARY_PATH(macOS). On mac you'll need to disable system integrity protection though.

Or alternatively, edit:

generated/QtDartBindings/dart/lib/Bindings.dart:    _dylib = ffi.DynamicLibrary.open('libQtDartBindings.so');

and use an hardcoded absolute path in the source.

On Linux, it's just:

export LD_LIBRARY_PATH=build-dev/generated/QtDartBindings/:$LD_LIBRARY_PATH

Now run:

cd app
dart pub get # Could this be done automatically ?
dart run bin/main.dart

Regenerating the Bindings

Be sure to build and install dartagnan and put it in path.

Then run:

dart pub get
dart refresh_bindings.dart

Repo Layout

app/ Our dart test app, which shows a Qt window.

generated/ Contains all the code generated by shiboken. Includes the dart classes which users will use, and also the intermediate C and C++ glue which calls the target C++ code.

typesystem.xml Used by shiboken, at "binding generation time". The file for configuring the shiboken generation. Lists all classes we want bindings.for

bindings_global.h Used by shiboken, at "binding generation time". Includes all headers we want bindings for.

shiboken_snippets/ Sometimes shiboken needs a little help and we can provide some snippets for it, so we say exactly what we want generated.

Known Issues

• macOS: "NSWindow drag regions should only be invalidated on the Main Thread!" See dart-lang/sdk#38315 , patches welcome

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