Pyqt Is a GUI Widgets Toolkit
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Python Qt Tutorial Documentation Release 0.0
Python Qt tutorial Documentation Release 0.0 Thomas P. Robitaille Jun 11, 2018 Contents 1 Installing 3 2 Part 1 - Hello, World! 5 3 Part 2 - Buttons and events 7 4 Part 3 - Laying out widgets 9 5 Part 4 - Dynamically updating widgets 13 i ii Python Qt tutorial Documentation, Release 0.0 This is a short tutorial on using Qt from Python. There are two main versions of Qt in use (Qt4 and Qt5) and several Python libraries to use Qt from Python (PyQt and PySide), but rather than picking one of these, this tutorial makes use of the QtPy package which provides a way to use whatever Python Qt package is available. This is not meant to be a completely exhaustive tutorial but just a place to start if you’ve never done Qt development before, and it will be expanded over time. Contents 1 Python Qt tutorial Documentation, Release 0.0 2 Contents CHAPTER 1 Installing 1.1 conda If you use conda to manage your Python environment (for example as part of Anaconda or Miniconda), you can easily install Qt, PyQt5, and QtPy (a common interface to all Python Qt bindings) using: conda install pyqt qtpy 1.2 pip If you don’t make use of conda, an easy way to install Qt, PyQt5, and QtPy is to do: pip install pyqt5 qtpy 3 Python Qt tutorial Documentation, Release 0.0 4 Chapter 1. Installing CHAPTER 2 Part 1 - Hello, World! To start off, we need to create a QApplication object, which represents the overall application: from qtpy.QtWidgets import QApplication app= QApplication([]) You will always need to ensure that a QApplication object exists, otherwise your Python script will terminate with an error if you try and use any other Qt objects. -
Testing Pyside/Pyqt Code Using the Pytest Framework and Pytest-Qt
Testing PySide/PyQt Code Using the pytest framework and pytest-qt Florian Bruhin “The Compiler” Bruhin Software 06. November 2019 Qt World Summit, Berlin About me • 2011: Started using Python • 2013: Started using PyQt and developing qutebrowser • 2015: Switched to pytest, ended up as a maintainer • 2017: qutebrowser v1.0.0, QtWebEngine by default • 2019: 40% employed, 60% open-source and freelancing (Bruhin Software) Giving trainings and talks at various conferences and companies! Relevant Python features Decorators registered_functions: List[Callable] = [] def register(f: Callable) -> Callable: registered_functions.append(f) return f @register def func() -> None: .... Relevant Python features Context Managers def write_file() -> None: with open("test.txt", "w") as f: f.write("Hello World") Defining your own: Object with special __enter__ and __exit__ methods. Relevant Python features Generators/yield def gen_values() -> Iterable[int] for i in range(4): yield i print(gen_values()) # <generator object gen_values at 0x...> print(list(gen_values())) # [0, 1, 2, 3] PyQt • Started in 1998 (!) by Riverbank Computing • GPL/commercial • Qt4 $ PyQt4 Qt5 $ PyQt5 PySide / Qt for Python • Started in 2009 by Nokia • Unmaintained for a long time • Since 2016: Officially maintained by the Qt Company again • LGPL/commercial • Qt4 $ PySide Qt5 $ PySide2 (Qt for Python) Qt and Python import sys from PySide2.QtWidgets import QApplication, QWidget, QPushButton if __name__ == "__main__": app = QApplication(sys.argv) window = QWidget() button = QPushButton("Don't -
Qml Controls from Scratch
CREATING QML CONTROLS FROM SCRATCH Chris Cortopassi Table of Contents Introduction ......................................................................................... 3 Part 0: Getting Started ......................................................................... 4 Part 1: Button ....................................................................................... 6 Part 2: CheckBox and RadioButton ...................................................... 8 Part 3: Switch ...................................................................................... 10 Part 4: Slider ........................................................................................ 12 Part 5: ScrollBar ................................................................................... 14 Part 6: ProgressBar.............................................................................. 15 Part 7: Spinner ..................................................................................... 16 Part 8: Dialog ....................................................................................... 17 Part 9: PageDots .................................................................................. 19 Part 10: Tabs ....................................................................................... 21 Part 11: Table ...................................................................................... 23 Part 12: TimePicker ............................................................................. 25 Part 13: DatePicker ............................................................................. -
An Introduction to Qt 4
AnAn IntroductionIntroduction toto QtQt 44 Jason Trent [email protected] OOuutltliinnee . Why Trolltech? . Why Qt? . Qt 4 Widgets, Datatypes, and Structures . Qt Designer . qmake . Qt without C++ . Demo WWhhyy TTrroolllltetecchh?? .. QQtt aanndd QQttooppiiaa CCoorree aarree OOppeenn SSoouurrccee .. SSuuppppoorrtteedd bbyy mmuullttii--mmiilllliioonn ddoollllaarr ccoommppaannyy WWhhyy QQt?t? .. MMuullttii--ppllaattffoorrmm – No “virtual machines” or emulation layers – Native compilation for Windows, X11, and Mac • Utilizes core OS technologies (Core, Aero, …) – Extensions - ActiveQt, Motif Migration WWhhyy QQt?t? Over 400 C++ Classes . Not just a GUI toolkit – File handling – Networking – Process handling – Threading – Database access – Event loop processing – XML processing – OpenGL integration – and beyond WWhhyy QQt?t? .. IInntteerrnnaattiioonnaalliizzaattiioonn – Built in support for Unicode and Translation • Language and font aware layouts • Bidirectional font support • Mixed-international interface .. SSeeee QQtt LLiinngguuiisstt ffoorr mmoorree WWhhyy QQt?t? .. NNoott jjuusstt mmuuttllii--ppllaattiiffoorrmm,, mmuullttii--aarrcchhiitteeccttuurree .. QQttooppiiaa CCoorree 44 SSeerriieess – Support for embedded devices • Cell phones, PDAs, etc… – Supports Qt4 widgets with little to no code change QQWWiiddggeett TThhee mmeeeekk mmaayy iinnhheerriitt tthhee eeaarrtthh…… ……bbuutt tthhee eeaarrtthh sshhaallll iinnhheerriitt QQWWiiddggeett QWidget QQtt 44 WWiiddggeetsts .. IInnhheerriitt tthhee aallll--ppoowweerrffuull QQWWiiddggeett .. IInncclluuddee:: -
A Pyqt GUI for a Soc Design a Pyqt GUI for a Soc Design SMR3249
Jose´ Antonio de la Torre las Heras Universidad de Castilla-La Mancha SMR3249 A PyQT GUI for a SoC design A PyQT GUI for a SoC design SMR3249 Contents 1 Vivado and SDK 4 2 main.c 9 3 Opening development environment 9 4 Designing the interface 11 4.1 Design in QtDesigner . 11 4.2 Exporting the interface . 18 5 Programming the controller 19 6 Testing the design 26 7 Optional exercises 31 7.1 Add controls to select a serial device and baudrate (easy) . 31 7.2 Use layouts to make tabs responsive . 31 7.3 Modify how pyqtgraph looks (easy) . 31 7.4 Modify how data is sent . 31 1 A PyQT GUI for a SoC design SMR3249 Introduction In this tutorial, you will learn how to communicate external devices like pmods sensors, and leds from Zedboard to a PC (frontend). In order to avoid privative software like: Matlab, Visual Basic, Labview. In this laboratory, we are going to use Python and different libraries which are completely free and open source. The advantages of using these kind of technologies are the following ones: you have control over all parts of your system and you don't need to trust in external companies and private design cycles. In this project, you will learn how to integrate a fully functional project from a reconfigurable part to high level programming in Python. The main objective of the project is that the student, at the end, understands how to integrate all the parts to create a final product. Objectives • To design a fully functional GUI (Graphical User Interface) • To create a controller of the GUI • To connect a Zedboard to the GUI • To control a Zedboard from the GUI • To get data and plot from Zedboard Procedure This project has different parts. -
Qt Framework
About Qt Qt is a framework to develop cross-platform applications. Currently, the supported platforms are Windows, Linux, macOS, Android, iOS, Embedded Linux and some others. Genarally, it means that the programmer may develop the code on one platform but compile, link and run it on another platform. But it also means that Qt needs help: to develop software it must cooperate with development tools on specific platforms, for example in case of Windows with Visual Studio. Qt is well-known for its tools for developing graphical user interfaces (GUI) , but it also provides powerful tools for threads, networking and communication (Bluetooth, serial port, web), 3D graphics, multimedia, SQL databases, etc. Qt has its own Integrated Development Environment (IDE): QtCreator. History: 1991: version 1.0 as cross-platform GUI programming toolkit was developed and implemented by TrollTech (Norway). 2005: version 4.0 was a big step ahead but the compatibility with older versions was lost. 2008: TrollTech was sold to Nokia. 2012: Nokia Qt division was sold to Digia (Finland). 2014: Digia transferred the Qt business to Qt Company. The latest Long Term Support (LTS) version is 5.12. Official website: https://www.qt.io/ Installation The link is https://www.qt.io/download. Select the non-commercial and open source version. It may be possible that you must register yourself creating a new passworded account. Select the latest stable release and the C/C++ development system(s) you are going to use. Tip: the Qt installer proposes to store the stuff in folder C:\Qt. To avoid later complications, agree. -
Sailfish OS Interview Questions and Answers Guide
Sailfish OS Interview Questions And Answers Guide. Global Guideline. https://www.globalguideline.com/ Sailfish OS Interview Questions And Answers Global Guideline . COM Sailfish OS Job Interview Preparation Guide. Question # 1 Tell us what you know about Sailfish OS? Answer:- Sailfish is a Linux-based mobile operating system developed by Jolla in cooperation with the Mer project and supported by the Sailfish Alliance. It is to be used in upcoming smartphones by Jolla and other licencees. Although it is primarily targeted at mobile phones, it is also intended to support other categories of devices. Read More Answers. Question # 2 Explain Sailfish OS Components? Answer:- Jolla has revealed its plans to use the following technologies in Sailfish OS: The Mer software distribution core A custom built user interface HTML5 QML and Qt Read More Answers. Question # 3 Do you know about Sailfish OS software availability? Answer:- Sailfish will be able to run most applications that were originally developed for MeeGo and Android, in addition to native Sailfish applications. This will give it a large catalogue of available apps on launch. Considering upon Jolla's declarations that Sailfish OS is be able to use software from following platforms Sailfish (natively created + ported like from Qt, Symbian, MeeGo - developers have reported that porting a Qt written software with Sailfish SDK takes a few hours only) Android applications are directly running in Sailfish OS. They are compatible as they are in third-party Android stores, with no needed modification (in most cases). MeeGo (because of backward compatibility thanks to MeeGo code legacy included in the Mer core) Unix and Linux (as Sailfish is Linux then using such a software is possible, especially RPM packages, either in terminal/console mode or with limitations implying from using Sailfish UI, if not ported and adjusted) HTML5 Read More Answers. -
Download Pyqt Tutorial (PDF Version)
PyQt About the Tutorial PyQt is a GUI widgets toolkit. It is a Python interface for Qt, one of the most powerful, and popular cross-platform GUI library. PyQt is a blend of Python programming language and the Qt library. This introductory tutorial will assist you in creating graphical applications with the help of PyQt. Audience This tutorial is designed for software programmers who are keen on learning how to develop graphical applications using PyQt. Prerequisites You should have a basic understanding of computer programming terminologies. A basic understanding of Python and any of the programming languages is a plus. Disclaimer & Copyright Copyright 2015 by Tutorials Point (I) Pvt. Ltd. All the content and graphics published in this e-book are the property of Tutorials Point (I) Pvt. Ltd. The user of this e-book is prohibited to reuse, retain, copy, distribute or republish any contents or a part of contents of this e-book in any manner without written consent of the publisher. We strive to update the contents of our website and tutorials as timely and as precisely as possible, however, the contents may contain inaccuracies or errors. Tutorials Point (I) Pvt. Ltd. provides no guarantee regarding the accuracy, timeliness or completeness of our website or its contents including this tutorial. If you discover any errors on our website or in this tutorial, please notify us at [email protected]. i PyQt Table of Contents About the Tutorial .............................................................................................................................................. -
Introduction to GUI Development Using Qt
Introduction to GUI development using Qt Paolo Quadrani – [email protected] Andrea Negri – [email protected] SuperComputing Applications and Innovation Department What is Qt ● Qt is a cross-platform development framework written in C++ ● Can be used in several programming languages through bindings ● Ruby ● Java ● Perl ● Python → PyQt ● The Qt Toolkit is a collection of classes for various purposes ● Database management ● XML ● WebKit ● Multimedia ● Networking ● ... ● For desktop, mobile and embedded development ● Used by more than 350,000 commercial and open source developers ● Backed by Qt consulting, support and training ● Trusted by over 6,500 companies worldwide Qt modules Qt brief timeline ● Qt Development Frameworks founded in 1994 ● Trolltech acquired by Nokia in 2008 ● Qt Commercial business acquired by Digia in 2011 ● Qt business acquired by Digia from Nokia in 2012 Why Qt • Write code once to target multiple platforms • Produce compact, high-performance applications • Focus on innovation, not infrastructure coding • Choose the license that fits you • Commercial, LGPL or GPL • Count on professional services, support and training PyQt ● PyQt is a set of Python bindings for Qt framework ● Bindings implemented as Python modules (620+ classes) ● Almost the entire Qt library is available ● Take advantage of both languages key strength ● Python: easy to learn, lot of extensions, no compilation required ● Qt: abstraction of platform-specific details, GUI designer “Hello world” in PyQt 1/2 from PyQt4.QtCore import * from PyQt4.QtGui -
Creating Meego Products in a Different Way and Faster - How to Change the Device Creation
Creating MeeGo products in a different way and faster - How to change the device creation Pasi Nieminen CEO [email protected] +358 40 737 3907 www.nomovok.com 1 The Questions That I Try Answer Today How to make product faster & better in MeeGo world How/why to change the UX creation - QML? MeeGo for ARM, where is it now? Where to find companies to work on MeeGo? 2 About Us We create products build on Open Source technologies #1 MeeGo company Pioneer in Embedded Open Source Pioneer in commercial utilization of Open Source in embedded devices. Since 2001, more than 400 OSS deployment project delivered Employs 110 OSS experts globally 400 more in ZCOCO.net for deep Linux expertize Locations 3 Currently serving businesses in Japan, Germany, France, US, Finland and Korea. Insider's View to MeeGo - Where Are We Now? 4 Current MeeGo Deployment Status Currently FULL build & integration pipeline working Currently MeeGo-dev + QT4.7 + NOMOVOK Steel Rat UX running on STE U8500 / Freescale i.mx51 / Renesas AP4 (All ARMv7 optimized) / IA See our demo @ demo area, and NOMOVOK staff 5 Forget C++ & Native QT apps - Go for QML 6 MeeGo Apps – Faster QT4.7 enables QML apps Declarative UI XML + JS 3x faster app creation to QT native apps Performance almost equal to native QT apps, in future much faster (declarative GUI => GPU) 7 QML – hello world import Qt 4.7 Rectangle { id: page width: 500; height: 200 color: "lightgray" Text { id: helloText8 text: "Hello world!" y: 30 anchors.horizontalCenter: page.horizontalCenter font.pointSize: -
Our Journey from Java to Pyqt and Web for Cern Accelerator Control Guis I
17th Int. Conf. on Acc. and Large Exp. Physics Control Systems ICALEPCS2019, New York, NY, USA JACoW Publishing ISBN: 978-3-95450-209-7 ISSN: 2226-0358 doi:10.18429/JACoW-ICALEPCS2019-TUCPR03 OUR JOURNEY FROM JAVA TO PYQT AND WEB FOR CERN ACCELERATOR CONTROL GUIS I. Sinkarenko, S. Zanzottera, V. Baggiolini, BE-CO-APS, CERN, Geneva, Switzerland Abstract technology choices for GUI, even at the cost of not using Java – our core technology – for GUIs anymore. For more than 15 years, operational GUIs for accelerator controls and some lab applications for equipment experts have been developed in Java, first with Swing and more CRITERIA FOR SELECTING A NEW GUI recently with JavaFX. In March 2018, Oracle announced that Java GUIs were not part of their strategy anymore [1]. TECHNOLOGY They will not ship JavaFX after Java 8 and there are hints In our evaluation of GUI technologies, we considered that they would like to get rid of Swing as well. the following criteria: This was a wakeup call for us. We took the opportunity • Technical match: suitability for Desktop GUI to reconsider all technical options for developing development and good integration with the existing operational GUIs. Our options ranged from sticking with controls environment (Linux, Java, C/C++) and the JavaFX, over using the Qt framework (either using PyQt APIs to the control system; or developing our own Java Bindings to Qt), to using Web • Popularity among our current and future developers: technology both in a browser and in native desktop little (additional) learning effort, attractiveness for new applications. -
Latex Beamer Presentation
Extend your KDE application Using QML! Artur Duque de Souza Aug/2011 Agenda • (Big) Introduction • A problem • KDE Solution • Issues • Future Qt Script QtScript C++ API to make your applications scriptable QScriptEngine • Environment to evaluate a script • Context • Global Object • Use QMetaObject system to automatically export QObjects QObjects Can be exported out of the box: • Properties • Signals • Slots • Q_INVOKABLE QScriptValue Container for QtScript data types: • Support for ECMA-262 types • Support for QObject, QVariant and QMetaObject • Prototype property that is common to all instances of an object JS Bindings JS Bindings for Qt Bindings are proxy objects/functions to interface with the ’real’ libraries JS Bindings for Qt Steps to create your bindings: • Create wrap code (check context arguments) • Register your wrappers with the engine • Be happy :) JS Bindings for Qt Steps to create your bindings: • Create wrap code (check context arguments) • Register your wrappers with the engine • Be happy :) JS Bindings for Qt Steps to create your bindings: • Create wrap code (check context arguments) • Register your wrappers with the engine • Be happy :) QML QML Declarative language to ease the development of UIs QDeclarativeEngine • Handles QML code • Does not inherit QScriptEngine • It has a QScriptEngine inside QDeclarativeEngine • Handles QML code • Does not inherit QScriptEngine • It has a QScriptEngine inside QDeclarativeEngine Public API • QML specific methods • It has its own ’context’: QDeclarativeContext • QObject works out of the box • It’s possible to register C++ declarative items QDeclarativeExpression Evaluate a JS expression in a QML context KDE First of all... ... why use QML? Declarative languages are way better (and faster) to build rich UIs! • Microblog plasmoid (C++): 1250 LOC • Declarative Microblog: 500 LOC First of all..