Interfacing Qt/QML with OCaml. Formely known as lablqt
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Let's write QML/QtQuick GUI for OCaml (or Reason) using lablqml!
In this repo you can find my work about integrating OCaml and Qt. Initially, I planned to generate binding code for OCaml and Qt Widgets and called this library
lablqt. But I found it hard to implement mostly because Qt relies on inheritance very much (we can't add onClick handler for button without inheritance). Later I decided to generate binding code for OCaml and QML/QtQuick. And I believe that QtQuick is the right way to create UI in Qt right now. See online book for getting started with Qt/QML itself
From 14th of February 2017 it's renamed from
lablqtto
lablqmlbecause it is actually about QtQuick and not QtWidgets or Qt itself. If you really need QtWidgets you can check out mrvn's work or def's.
Directories mapping:
- PPX syntax extension with code generator is in
ppx/
. - Library for interfacing with QtQuick 2 is in
lib
. - Demo that can be build during opam installation is in
dune_test
. Usemake demo
to build it. - Old demos that are not using
dune
as build system are indemos/
. - Demo app
qocamlbrowser
(ocamlbrowser with QtQuick instead of Tcl/Tk) is located in separate repo.
Github pages site and tutorial are available.
Use
./configure && maketo build it. Don't forget to install
g++and good Qt version (>= 5.3 I think,
./configurewill check for it, btw).
Installed files
$ opam show lablqml --list-files /home/kakadu/.opam/4.07.0+fp+flambda/bin/ppx_qt /home/kakadu/.opam/4.07.0+fp+flambda/doc/lablqml/CHANGELOG /home/kakadu/.opam/4.07.0+fp+flambda/doc/lablqml/README.md /home/kakadu/.opam/4.07.0+fp+flambda/lib/lablqml /home/kakadu/.opam/4.07.0+fp+flambda/lib/lablqml/META /home/kakadu/.opam/4.07.0+fp+flambda/lib/lablqml/dune-package /home/kakadu/.opam/4.07.0+fp+flambda/lib/lablqml/lablqml.a /home/kakadu/.opam/4.07.0+fp+flambda/lib/lablqml/lablqml.cma /home/kakadu/.opam/4.07.0+fp+flambda/lib/lablqml/lablqml.cmi /home/kakadu/.opam/4.07.0+fp+flambda/lib/lablqml/lablqml.cmt /home/kakadu/.opam/4.07.0+fp+flambda/lib/lablqml/lablqml.cmti /home/kakadu/.opam/4.07.0+fp+flambda/lib/lablqml/lablqml.cmx /home/kakadu/.opam/4.07.0+fp+flambda/lib/lablqml/lablqml.cmxa /home/kakadu/.opam/4.07.0+fp+flambda/lib/lablqml/lablqml.cmxs /home/kakadu/.opam/4.07.0+fp+flambda/lib/lablqml/lablqml.h /home/kakadu/.opam/4.07.0+fp+flambda/lib/lablqml/lablqml.ml /home/kakadu/.opam/4.07.0+fp+flambda/lib/lablqml/lablqml.mli /home/kakadu/.opam/4.07.0+fp+flambda/lib/lablqml/liblablqml_stubs.a /home/kakadu/.opam/4.07.0+fp+flambda/lib/lablqml/opam /home/kakadu/.opam/4.07.0+fp+flambda/lib/stublibs/dlllablqml_stubs.so
There is a library here. It's fine to use it for simple programs
There is also
ppx_qtexecutable. It is used to generate C++ code from OCaml. See
demos/for examples
Minimal ocamlfind-based helloworld
➜ cat a.ml
open Lablqmllet main () = () let () = run_with_QQmlApplicationEngine Sys.argv main "Root.qml"
➜ cat Root.qml
import QtQuick 2.0 import QtQuick.Controls 1.0ApplicationWindow { color: "#FFFFDF" // we declare rectangle with custom background color width: 400; height: 300; // with custom size Text { anchors.centerIn: parent text: "Click me!" } MouseArea { anchors.fill: parent // all space in parent Rectangle will be clickable } }
➜ ocamlfind opt -package lablqml a.ml -thread -linkpkg -cclib -lQt5Quick -cclib -lQt5Qml -cclib -lQt5Network -cclib -lQt5Widgets -cclib -lQt5Gui -cclib -lQt5Core -cclib -lstdc++ ➜ ./a.out
Playing with REPL
#thread;; #require "lablqml";;