GUI Programming with Python (PyQt 5)

PyQt 5 is the Python binding for Qt 5, developed by Riverbank Computing. This talk covers its very basics, and offers some extra information about general GUI programming.

Transcript

1. GUI Programming with Python
2. Me • Call me TP • Follow @uranusjr • https://uranusjr.com 2
4. www. .com
5. http://macdown.uranusjr.com
6. GUI Programming with Python
9. Are you sure?
10. Web application?
11. Why • Native features • Nice Appearance • Easier access 11 Why Not • Platform-specific • Difficult to learn • Deployment
12. GUI frameworks are not really Python
13. Native behaviour matters
14. http://qt-project.org
15. Qt • Pronounced as “cute” • Cross-platform • C++ (plus code generator) 15
16. Application Framework • Core utility types • GUI components • Multimedia, networking, etc. 16
17. PyQt • Riverbank Computing • Qt 5 + Python 2/3 • Qt 4 + Python 2 • GPL or commercial 17 PySide • Nokia → community • Qt + Python 2 • LGPL
18. Installation • Windows: pyqt.sourceforge.net • OS X: brew  install  pyqt5 • Linux: Use the force package manager 18
19. If you haven’t done it yet, it’s too late.
20. The Run Loop 20 Launch Initialise W ait for events Handle events Quit
21. Launch Initialise W ait for events Handle events Quit The Run Loop 21
22. Demo #1 I’m using PyQt 5.3 on OS X. Source: https://gist.github.com/uranusjr/f55c8a5622c80c29732a
23. Qt Widgets • Not covering QML today • Basic GUI components • “Top level” vs “Child widgets” 23
24. Demo #2 Widgets within widgets are children of widgets. Source: https://gist.github.com/uranusjr/f55c8a5622c80c29732a
25. Signals & Slots • When something happen, a signal is emitted • Slots can be connected to signals • When a signal emits, all slots connected to it are called 25
26. Demo #3 Simon says: Open sesame! Source: https://gist.github.com/uranusjr/f55c8a5622c80c29732a
27. Layouts • Horizontal, vertical, grid • Alignment, ratio, fill rule • Nest them to create complex layouts! 27
28. Demo #4 Get your widgets in a row. Or a column. Or whatever you wish. Source: https://gist.github.com/uranusjr/f55c8a5622c80c29732a
29. Qt Essentials • Basic modules • Core, Test • Modules based on other libraries • Multimedia, Network, SQL, WebKit • GUI modules • Widgets, Utility Widgets, QML, Quick 29
30. Demo #5 Qt unleashed. Source: https://gist.github.com/uranusjr/f55c8a5622c80c29732a
31. How Does It Work? • Qt written in C++ • Compiled libraries • Bindings created by SIP • Python program 31
32. http://setanta.wordpress.com/binding-c/
33. Usage Issues • Deployment • Platform-dependent • pyqtdeploy • Licensing • GPL or commercial 33
34. PyQt • Riverbank Computing • Qt 5 + Python 2/3 • Qt 4 + Python 2 • GPL or commercial 34 PySide • Nokia → community • Qt + Python 2 • LGPL Mostly compatible
35. Resources • http://pyqt.sourceforge.net/Docs/PyQt5/ • http://qt-project.org/doc/qt-5/ • Learn to read (some) C++!! 35
36. Don’t Like It? • IronPython, PyObjC • PyGTK+, wxPython • Kivy • Toga 36
37. FIRE QUESTIONS