This project moved to https://github.com/lqt5/lqt

Overview

lqt is a Lua/luajit binding to the Qt5 framework. It is an automated binding generated from the modified version of Qt headers, and covers almost all classes and methods from supported Qt modules.

For more info, check the documentation, mailing list or contact the authors:

• Michal Kottman michal.kottman@gmail.com
• Mauro Iazzi mauro.iazzi@gmail.com
• Peter Kümmel syntheticpp@gmx.net
• Saniko 116453813@qq.com

Features

• automatically generated from modified version of Qt headers

• supported modules:

  • QtCore
  • QtNetwork
  • QtSql
  • QtPositioning
  • QtScript
  • QtQml
  • QtWebChannel
  • QtGui
  • QtWidgets
  • QtOpenGL
  • QtPrintSupport
  • QtUiTools
  • QtQuick
  • QtQuickWidgets
  • QtWebEngineCore
  • QtWebEngineWidgets
  • QtTest

• high API coverage - only a minimum of methods are not available

• C++/Qt features available:

  • method overloads
  • virtual methods (including abstract methods)
  • multiple inheritance
  • you can store additional Lua values in userdata - they act like Lua tables
  • several overloaded operators are supported
  • chosen templated classes are available, like QList<QString>
  • signal/slot mechanism - you can define custom slots in Lua
  • QObject derived objects are automatically cast to correct type thanks to Qt metaobject system
  • implicit conversion - i.e. write Lua strings where QString is expected, or numbers instead of QVariant

• optional memory management - you can let the Lua GC destroy objects, or let Qt parent/child management do the work

History

lqt 0.9

• Public beta, most issues and API stabilized

Building lqt

To compile lqt, you need:

• Luajit 2.0
• CMake
• Qt and headers, download from Qt offical site

You can get the latest source of lqt from https://github.com/lqt5/lqt . When you have the sources, create an out-of-source build directory (where the binaries will be built, I often use build).

Then, modify CMakeList.txt, change Qt/luajit path for compile.

On mac os system:

1. change path to you Qt5 install path:

    set(CMAKE_PREFIX_PATH ~/Qt/5.13.0/clang_64/lib/cmake/)

On Windows sytem (use msvc 2017):

1. download and extract luajit2.1.0-beta3 to /depentds/LuaJIT-2.1.0-beta3 folder.
2. compile luajit use msvc toolchain(run src/msvcbuild.bat)
3. change CMakeList.txt, modify path:

    set(CMAKE_PREFIX_PATH D:/Qt/Qt5.13.0/5.13.0/msvc2017_64/lib/cmake)

4. update submodule use:

    git submodule init
    git submodule update

Then, use CMake to generate the Makefile and run make as usual:

    mkdir build; cd build
    cmake ..
    make -j4 # use parallel build with your number of cores/processors

The generated Lua binding libraries are created in the lib directory, you can copy them to your LUA_CPATH.

Usage

A quick example of "Hello World!" button with signal/slot handling:

    local QtCore = require 'qtcore'
    local QtGui = require 'qtgui'
    local QtWidgets = require 'qtwidgets'

    local app = QtWidgets.QApplication.new(select('#',...) + 1, {'lua', ...})

    local btn = QtWidgets.QPushButton.new("Hello World!")
    btn:connect('2pressed()', function(self)
        print("I'm about to close...")
        self:close()
    end)
    btn:setWindowTitle("A great example!")
    btn:resize(300,50)
    btn:show()

    app.exec()

For more examples, check out the test or examples folder and the doc folder for documentation on detailed usage - memory management, signal/slot handling, virtual method overloading, etc. Also, have a look at the examples and feel free to add your own!

License

Copyright (c) 2007-2009 Mauro Iazzi Copyright (c) 2008-2009 Peter Kümmel Copyright (c) 2010-2011 Michal Kottman Copyright (c) 2019-2019 Saniko

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.