What's New in Qt 6 on the Desktop?
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Plasma on Mobile Devices
Plasma on Mobile devices Application Ecosystem MC Bhushan Shah KDE Developer Agenda ● Initial development of the Plasma Mobile ● Basic architecture details ● Advantages to KDE community ● Application ecosystem and development ● Future for Plasma Mobile ● Challenges Introduction ● KDE developer and sysadmin ● Plasma Mobile maintainer and lead developer ● Employed by Bluesystems GmbH ● From Vadodara, India KDE ● Previously known as the K Desktop Environment ● Now community, which creates free software for end users ● Several products including Plasma, KDE Frameworks, KDE applications. Plasma Mobile ● Announced in the July 2015 ● Vision of providing completely free and open-source mobile platform which respects user’s privacy and freedom. ● Initial prototype on the LG Nexus 5. Initial Development ● LGE Nexus 5 as reference device ● Ubuntu Touch 15.04 (vivid) as base system ● Makes use of the Android binary blobs / drivers ● Can also run on the desktop system for development Basic architecture details ● KWin wayland as compositor ● DRM/GBM or hwcomposer backends ● plasmashell and mobile shell package ● QtQuickControls2 and Kirigami for application development Advantages to KDE community ● Several performance improvements ● Better touch input support in applications and shell ● Improvements in Wayland support ● More modular and re-usable user interfaces Application ecosystem and development ● QtQuickControls2 and Kirigami as toolkit ● CMake/QMake as a buildsystem ● Various bundle formats as well as native distribution packaging for the distribution -
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 ............................................................................. -
KDE Free Qt Foundation Strengthens Qt
How the KDE Free Qt Foundation strengthens Qt by Olaf Schmidt-Wischhöfer (board member of the foundation)1, December 2019 Executive summary The development framework Qt is available both as Open Source and under paid license terms. Two decades ago, when Qt 2.0 was first released as Open Source, this was excep- tional. Today, most popular developing frameworks are Free/Open Source Software2. Without the dual licensing approach, Qt would not exist today as a popular high-quality framework. There is another aspect of Qt licensing which is still very exceptional today, and which is not as well-known as it ought to be. The Open Source availability of Qt is legally protected through the by-laws and contracts of a foundation. 1 I thank Eike Hein, board member of KDE e.V., for contributing. 2 I use the terms “Open Source” and “Free Software” interchangeably here. Both have a long history, and the exact differences between them do not matter for the purposes of this text. How the KDE Free Qt Foundation strengthens Qt 2 / 19 The KDE Free Qt Foundation was created in 1998 and guarantees the continued availabil- ity of Qt as Free/Open Source Software3. When it was set up, Qt was developed by Troll- tech, its original company. The foundation supported Qt through the transitions first to Nokia and then to Digia and to The Qt Company. In case The Qt Company would ever attempt to close down Open Source Qt, the founda- tion is entitled to publish Qt under the BSD license. This notable legal guarantee strengthens Qt. -
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. -
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.. -
Reusable QML Components
Reusable QML Components Avnee Nathani @AvneeNathani About me… ● Avnee Nathani ● Post-graduate student of Computer applications ● Open-source enthusiast ● Nokia Developer Champion (2012, 2013) ● Qt Ambassador (2011) What do I work on? ● Qt Projects (github.com/AvneeNathani) ● KDE Games (KDiamond) ● Mobile applications (Windows Phone, Android) ● Research on Handwriting recognition (http://avnee.wordpress.com) Agenda ● QML application development in brief ● QML basic components ● Need for custom QML components ● Custom components in KDiamond game ● Demo – Creating custom UI components ● Writing QML components ● ‘Reusability’ is the key when designing ● Importing Reusable components ● Conclusion What does Qt Quick offer? ● Qt Quick = QML UI Creation Kit ● New way to create Qt User Interfaces ● QML works on UI, Qt helps with backend code implementation ● Declarative language: “QML” - CSS & JavaScript like syntax ● Supports states and transitions QML Basic Components • Rectangle (basic component, holds other components) • Image • BorderImage • Text • ListView These are some of the primary components. Complex components are built by grouping primary components e.g. List with attributes such as icon, name and description QML Basic Components - Rectangle Rectangle { width: 100 height: 100 color: "red" border.color: "black" border.width: 5 radius: 10 } Shows the effects of some of the common properties on a Rectangle item, which in this case is used to create a square QML Basic Components - Images Image { source: "pics/borderframe.png" } An unscaled image is displayed using an Image. A BorderImage is used to display the image, and it is given a size that is larger than the original image. BorderImage { width: 180 height: 180 border { left: 30; top: 30; right: 30; bottom: 30 } source: "pics/borderframe.png" } QML Basic Components - Text Text items can display both plain and rich text. -
Why Be a KDE Project? Martin Klapetek David Edmundson
Why be a KDE Project? Martin Klapetek David Edmundson What is KDE? KDE is not a desktop, it's a community „Community of technologists, designers, writers and advocates who work to ensure freedom for all people through our software“ --The KDE Manifesto What is a KDE Project? Project needs more than just good code What will you get as a KDE Project? Git repository Git repository plus „scratch repos“ (your personal playground) Creating a scratch repo git push –all kde:scratch/username/reponame Git repository plus web interface (using GitPHP) Git repository plus migration from Gitorious.org Bugzilla (the slightly prettier version) Review Board Integration of git with Bugzilla and Review Board Integration of git with Bugzilla and Review Board Using server-side commit hooks ● BUG: 24578 ● CCBUG: 29456 ● REVIEW: 100345 ● CCMAIL: [email protected] Communication tools Mailing lists Wiki pages Forums Single sign-on to all services Official IRC channels #kde-xxxxx (on Freenode) IRC cloak me@kde/developer/mklapetek [email protected] email address Support from sysadmin team Community support Development support Translations (71 translation teams) Testing support (Active Jenkins and EBN servers, plus Quality Team) Project continuation (when you stop developing it) KDE e.V. support Financial and organizational help Trademark security Project's licence defense via FLA Promo support Stories in official KDE News site (Got the Dot?) Your blog aggregated at Planet KDE Promo through social channels Web hosting under kde.org domain Association with one of the best -
KDE Galaxy 4.13
KDE Galaxy 4.13 - Devaja Shah About Me ●3rd Year Alienatic Student at DA- !"# Gandhinagar ●Dot-editor %or KDE &romo "ea' ●Member of KDE e.(. ●&a))ion for Technology# Literature ●+un the Google Developer Group in !olle$e ●-rganizin$ Tea' of KDE Meetup# con%./de.in 14 -/ay, sooooo....... ●Ho1 many of you are %an) of Science Fiction3 ●Astronomy3 ● 0o1 is it Related to KDE3 ●That i) precisely 1hat the talk is about. ●Analogy to $et you to kno1 everythin$ that you should about ● “Galaxy KDE 4.13” 4ait, isn't it 4.14? ●KDE5) late)t ver)ion S! 4.14 6 7ove'ber 8914 ●KDE Soft1are !o',ilation ::.xx ●Significance o% +elea)e) ●- -r$ani.ed# )y)te'atic co',ilation o% %eature) < develo,'ent) ●- 2ive )erie) of relea)e) till date. ●7o Synchronized +elea)e) Any lon$er: ● - KDE 2ra'e1ork) > ?'onthly@ ● - KDE &la)'a > ?3 'onth)@ ● - KDE Ap,lication) ?date ba)ed@ ●Au)t *i/e Ap, (er)ion) But, 1hat am I to do o% the Galaxy 7umber? ●4ork in a "eam ●4ork acros) a Deadline ●-%;ce Space Si'ulation ●Added 'petus %or Deliverin$ your 2eature) ●You 1ork a) a ,art of the C!oreD Developer "ea' ● nstils Discipline ●Better +e),onse# Better 2eedbac/ ●Better Deliverance ●Synchronized 1ork with other C)ea)onedD developer) Enough of the bore....... ●Ho1 do $et started3 ● - Hope you didn't )nooze yesterday ● +!# Subscribe to Mailing Lists ●Mentoring Progra') ●GsoC# Season of KDE, O2W Progra') ●Bootstra,pin$ Training Session) Strap yourself onto the Rocket ●And Blast O%%......... ● ● ● Entered A 4ormhole and Ea,ped into the KDE Galaxy ●No1 what? ●Pick a Planet to nhabit ●But.... -
Meego Tablet UX on Wayland
MeeGo Tablet UX on Wayland What is Wayland? ● New graphics system architecture ● A protocol between compositor and clients ● A sample implementation Current X11 Architecture clients appgrid panels lockscreen calculator, notes etc meego-ux-daemon meego-qml-launcher compositor mcompositor drivers/X X server EGL/GLES2 Linux kernel KMS evdev GEM/PVR New Architecture ● wayland-compositor replaces X and mcompositor ● meego-ux-daemon talks to compositor using a MeeGo specific Wayland interface ● Wayland compositor controls KMS, evdev, backlight, hotplug, idle timeout (screensaver) ● All QML unchanged except for switching to QtQuick 2.0 clients appgrid panels lockscreen calculator, notes etc meego-ux-daemon meego-qml-launcher Homescreen Activate Create surface Input Lockscreen Destroy Swap buffer Frame sync Create client compositor meego-tablet-shell meego-tablet-client core Modesetting Hotplug drivers pageflip EGL/GLES2 Input events Linux kernel KMS GEM/PVR evdev wayland-compositor ● It's the canonical sample compositor ● Written in C, directly to EGL/GLES2 ● No high-level dependencies ● Simple 2D scenegraph, efficient repaint loop ● No overdraw, pageflips to client buffers ● MeeGo implemented in a loadable policy module ● Simple fullscreen animations ● Higher level UI in meego-ux-daemon QML Scenegraph ● The initial bringup work uses QML Scenegraph ● QML SceneGraph implements QML, like QDeclarativeView, but straight to GLES ● Avoids the awkward qpainter abstraction that gets in the way of efficient repainting ● Scheduled for Qt 5 ● We need to -
Kdesrc-Build Script Manual
kdesrc-build Script Manual Michael Pyne Carlos Woelz kdesrc-build Script Manual 2 Contents 1 Introduction 8 1.1 A brief introduction to kdesrc-build . .8 1.1.1 What is kdesrc-build? . .8 1.1.2 kdesrc-build operation ‘in a nutshell’ . .8 1.2 Documentation Overview . .9 2 Getting Started 10 2.1 Preparing the System to Build KDE . 10 2.1.1 Setup a new user account . 10 2.1.2 Ensure your system is ready to build KDE software . 10 2.1.3 Setup kdesrc-build . 12 2.1.3.1 Install kdesrc-build . 12 2.1.3.2 Prepare the configuration file . 12 2.1.3.2.1 Manual setup of configuration file . 12 2.2 Setting the Configuration Data . 13 2.3 Using the kdesrc-build script . 14 2.3.1 Loading project metadata . 14 2.3.2 Previewing what will happen when kdesrc-build runs . 14 2.3.3 Resolving build failures . 15 2.4 Building specific modules . 16 2.5 Setting the Environment to Run Your KDEPlasma Desktop . 17 2.5.1 Automatically installing a login driver . 18 2.5.1.1 Adding xsession support for distributions . 18 2.5.1.2 Manually adding support for xsession . 18 2.5.2 Setting up the environment manually . 19 2.6 Module Organization and selection . 19 2.6.1 KDE Software Organization . 19 2.6.2 Selecting modules to build . 19 2.6.3 Module Sets . 20 2.6.3.1 The basic module set concept . 20 2.6.3.2 Special Support for KDE module sets .