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Getting Started on Windows
==========================
The Qt library has to be built with the same version of MSVC as Python and PySide, this can be
selected when using the online installer.
Requirements
------------
* `MSVC2017`_ (or MSVC2019) for Python 3 on Windows,
* `OpenSSL`_ (optional for SSL support, Qt must have been configured using the same SSL library).
* ``sphinx`` package for the documentation (optional).
.. note:: Python 3.8.0 was missing some API required for PySide/Shiboken so it's not possible
to use it for a Windows build.
.. _MSVC2017: https://visualstudio.microsoft.com/thank-you-downloading-visual-studio/?sku=BuildTools
.. _OpenSSL: https://sourceforge.net/projects/openssl/
Building from source on Windows 10
----------------------------------
Creating a virtual environment
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The ``venv`` module allows you to create a local, user-writeable copy of a python environment into
which arbitrary modules can be installed and which can be removed after use::
python -m venv testenv
call testenv\Scripts\activate
will create and use a new virtual environment, which is indicated by the command prompt changing.
Setting up CLANG
~~~~~~~~~~~~~~~~
libclang can be downloaded from the
`Qt servers <https://download.qt.io/development_releases/prebuilt/libclang>`_.
for example, ``libclang-release_130-based-windows-vs2019_64.7z``.
Note that from version 12 onwards, the prebuilt Windows binaries from
`LLVM <https://www.llvm.org>`_ no longer contain CMake configuration files; so
they can no longer be used.
Extract the files, and leave it on any desired path, for example, ``c:``,
and set the environment variable required::
set LLVM_INSTALL_DIR=c:\libclang
set PATH=C:\libclang\bin;%PATH%
Getting PySide
~~~~~~~~~~~~~~
Cloning the official repository can be done by::
git clone --recursive https://code.qt.io/pyside/pyside-setup
Checking out the version that we want to build, for example, 6.0::
cd pyside-setup && git checkout 6.0
Install the general dependencies::
pip install -r requirements.txt
.. note:: Keep in mind you need to use the same version as your Qt installation
Building PySide
~~~~~~~~~~~~~~~
Check your Qt installation path, to specifically use that version of qtpaths to build PySide.
for example, ``E:\Qt\6.0.0\msvc2019_64\bin\qtpaths.exe``.
Build can take a few minutes, so it is recommended to use more than one CPU core::
python setup.py build --qtpaths=c:\path\to\qtpaths.exe --openssl=c:\path\to\openssl\bin --build-tests --ignore-git --parallel=8
Installing PySide
~~~~~~~~~~~~~~~~~
To install on the current directory, just run::
python setup.py install --qtpaths=c:\path\to\qtpaths.exe --openssl=c:\path\to\openssl\bin --build-tests --ignore-git --parallel=8
Test installation
~~~~~~~~~~~~~~~~~
You can execute one of the examples to verify the process is properly working.
Remember to properly set the environment variables for Qt and PySide::
python examples/widgets/widgets/tetrix.py
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