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|
===============
Getting Started
===============
To develop with |project|, you must install Python, Clang, and |project|.
Preparing for the Installation
==============================
Before you can install |project|, you must install the following software:
* Python 3.5+ or 2.7
* libclang 5.0+ (for Qt 5.11) or 6.0+ (for Qt 5.12)
* Recommended: a virtual environment, such as `venv <https://docs.python.org/3/library/venv.html>`_ or `virtualenv <https://virtualenv.pypa.io/en/stable/installation>`_
Installing |project|
====================
After you have installed the required software, you are ready to install the |project|
packages using the pip wheel. Run the following command from your command
prompt to install::
pip install PySide2 # For the latest version on PyPi
or::
pip install --index-url=http://download.qt.io/snapshots/ci/pyside/5.12/latest pyside2 --trusted-host download.qt.io
Testing the Installation
========================
Now that you have |project| installed, you can test your setup by running the following Python
constructs to print version information::
import PySide2.QtCore
# Prints PySide2 version
# e.g. 5.11.1a1
print(PySide2.__version__)
# Gets a tuple with each version component
# e.g. (5, 11, 1, 'a', 1)
print(PySide2.__version_info__)
# Prints the Qt version used to compile PySide2
# e.g. "5.11.2"
print(PySide2.QtCore.__version__)
# Gets a tuple with each version components of Qt used to compile PySide2
# e.g. (5, 11, 2)
print(PySide2.QtCore.__version_info__)
Creating a Simple Application
=============================
Your |project| setup is ready, so try exploring it further by developing a simple application
that prints "Hello World" in several languages. The following instructions will
guide you through the development process:
* Create a new file named :code:`hello_world.py`, and add the following imports to it.
::
import sys
import random
from PySide2 import QtCore, QtWidgets, QtGui
The |pymodname| Python module provides access to the Qt APIs as its submodule.
In this case, you are importing the :code:`QtCore`, :code:`QtWidgets`, and :code:`QtGui` submodules.
* Define a class named :code:`MyWidget`, which extends QWidget and includes a QPushButton and QLabel.
::
class MyWidget(QtWidgets.QWidget):
def __init__(self):
super().__init__()
self.hello = ["Hallo Welt", "Hei maailma", "Hola Mundo", "Привет мир"]
self.button = QtWidgets.QPushButton("Click me!")
self.text = QtWidgets.QLabel("Hello World")
self.text.setAlignment(QtCore.Qt.AlignCenter)
self.layout = QtWidgets.QVBoxLayout()
self.layout.addWidget(self.text)
self.layout.addWidget(self.button)
self.setLayout(self.layout)
self.button.clicked.connect(self.magic)
def magic(self):
self.text.setText(random.choice(self.hello))
The MyWidget class has the :code:`magic` member function that
randomly chooses an item from the list :code:`hello`. This function
is called when you click the button.
* Now, add a main function where you instantiate :code:`MyWidget` and
:code:`show` it.
::
if __name__ == "__main__":
app = QtWidgets.QApplication([])
widget = MyWidget()
widget.resize(800, 600)
widget.show()
sys.exit(app.exec_())
Your example is ready to be run. Try clicking the button at the bottom
and see which greeting you get.
|
