Qt 5

Qt is a cross-platform C++ library for constructing graphical user interfaces.

External Documentation

• Qt Web Site

• Qt Documentation

Supported Versions

The following versions of Qt are regularly tested with our code crafting tools:

• libqt5 5.9.5 (Ubuntu 18.04)

• libqt5 5.12.8 (Ubuntu 20.04)

Installation Notes

The required Qt 5 C++ libraries can be installed on Ubuntu 20.04/18.04 using the following command:

sudo apt-get install qt5-default

Although these packages should be sufficient for running C++ Qt programs, some additional setup is required to support Python Qt applications. First, create a codecraftsmen virtual Python environment as described here. Next, activate this environment and install the Python language bindings for Qt:

workon codecraftsmen
pip install PyQt5
pip install qtpy

The following program can be used to test your PyQt5 installation:

import sys
from qtpy.QtWidgets import QApplication, QLabel

app = QApplication(sys.argv)
label = QLabel("Hello World")
label.show()
app.exec_()

If the code shown above is saved in a file named hello.py, you can run it in the codecraftsmen virtual Python environment like this:

workon codecraftsmen
python hello.py