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Andreas Jakl [@andijakl]
mopius.com
Qt App Development
1 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Digia, Qt and their respective logos are trademarks of Digia Corporation in Finland and/or other countries worldwide.
Andreas Jakl
• Startup founder & app developer
– @andijakl, @mopius
– andreas.jakl@mopius.com
– mopius.com
• History
– Nokia: Technology Wizard
– FH Hagenberg, Mobile Computing: Assistant Professor
– Siemens / BenQ Mobile: Augmented Reality-Apps
2 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
3 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
From Your Idea to the Store
Choose target market(s) for your app
Europe, America, Africa, Asia, etc.
Select target platform(s)
Andorid, iOS, Windows Phone, BlackBerry, Firefox OS
Choose development technology
HTML5, C++, C#, Java, ObjectiveC, Swift
Design, develop & test
Distribute
... and get famous and rich!
4 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Agenda
What? Why? Where? How? When? Now!
5
Qt – What?
Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Multi Screen
• Computing world today
– Laptop, Phones, tablets
– TV
– Car IVI
– Wearables
– Virtual and augmented reality
– Specialized devices
– etc.
6 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
7 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Multi Platform App Development
Windows | Mac | Linux
Android | iOS | WinRT | BlackBerry* | Sailfish*
Embedded Linux | Embedded Android | Windows Embedded
Integrity | QNX | VxWorks
Native apps
Use operating system and its functions directly
(different code for networking, GPS, etc.)
* Community support only
8 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Multi Platform App Development
Native apps
Use operating system and its functions directly
(different code for networking, GPS, etc.)
Your App
Qt framework
Same code works on all platforms,
covers many usecases (GPS, etc.)
(if needed, direct access is still possible)
* Community support only
Windows | Mac | Linux
Android | iOS | WinRT | BlackBerry* | Sailfish*
Embedded Linux | Embedded Android | Windows Embedded
Integrity | QNX | VxWorks
9 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
10 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
What is Qt?
Developer
Publish to
– Windows
– Linux
– Mac
– Embedded
– Android
– iOS
– etc.
App Source Code
Using Qt SDK for
– Dev. environment
– Testing
– Translation
– Help
Using Qt framework for
– User Interface
– Networking
– Location (GPS)
– Web integration
– ...
11 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Qt 5 Demo
www.youtube.com/watch?v=vhWS_bN-T3k
12 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Qt 5.4
youtube.com/watch?v=wMs1pSZMnG0
13
Qt – Why?
Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Qt – What’s Inside?
• Cross-Platform
– Same source code for 15 platforms
– Maximum performance – native apps!
• Generic
– User Interface
– Declarative UI, animation, gestures, multi-touch, 3D (OpenGL)
– Web (Chromium-based) & JavaScript engine included
– Multimedia (audio, video), Sensors, Bluetooth, Positioning
– Networking, XML
– SQL, files, app settings
– Container classes, object communication, threading, unit testing
– doc.qt.io/qt-5/qtmodules.html
• Extend
– Include any 3rd party C++ library / code
14 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
15 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Qt: On Your PC already!
… and many, many more!
All trademarks and logos are property of their respective owners.
More information: http://www.qt.io/qt-in-use/
http://lumiaconversations.microsoft.com/2011/03/15/10-qt-use-cases-you-didnt-know/
16 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
17 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
The Qt Company
Trolltech Nokia Digia Qt Company
(owned by Digia)
18 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Qt.io
One product. One ecosystem.
Integrates: qt-project.org and qt.digia.com
19
Qt: Free vs. Commercial
Open Source
qt.gitorious.org
Qt can be used in commercial,
closed-source apps
Changes to Qt source
must be shared
Additional UI controls (charts, etc.)
More modules (Qt Quick Compiler, etc.)
More tools (profiling)
Support options
Free (LGPL v2.1 / v3 license) Commercial Licenses
Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
qt-project.org/legal.html
Qt Packages
• Community
– open source
– GPL / LGPL (v2.1 -> v3)
• Indie Mobile
– commercial subscription, mobile platforms only
– €20 / month
• Professional
– commercial subscription, mobile + desktop
– €109 / month
• Enterprise
– perpetual commercial license, embedded + mobile + desktop, device creation
20 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Embedded & Internet of Things
• Increasing use of touch screens
• Need for simple to configure &
flexible stack
• Machine to Machine (M2M)
communication
21 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
22 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Cross-Platform Alternatives
C#
Commercial
HTML5
(e.g., Apache Cordova)
JavaScript
Open Source
many
more …
23 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Number of Target Platforms
24 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Top 10 App Quality
25 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Time Savings
26 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Cost Performance Ratio
27
Qt – Where?
Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
28 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Technologies & Platforms
C++
OpenGL
QML
HTML5
CSS3
JavaScript
Windows
Mac
Linux
Embedded Linux
Embedded Android
Windows Embedded
Integrity
QNX
VxWorks
WinRT
Android
iOS
BlackBerry
Sailfish
Android
• Full integration
– Android 2.3.3+ (API level 10)
– Originally based on community port
– Optional: Ministro
– Avoid multiple Qt installations on device
– Issues with Android 5.0
• Qt 5.2+
29 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
iOS
• Full iOS support
– iPhone 3GS+
– iPad 2+
• Device deployment & publishing
– Qt Creator integration
– OS X & Xcode required
– iOS Developer Program membership required
• Qt 5.2+
30 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Qt on Windows Runtime
• Compliant with Windows Store
– Windows 8.1+
– Windows Phone 8.1+
• Feature set
– Qt Essential modules
– Geopositioning
– Qt Quick Enterprise Controls
– Engin.io
– Qt Quick Compiler
– Multimedia
• Qt 5.4+
31 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
BlackBerry 10
• Qt as major dev framework in BB10
– QNX Operating System
– Cascades UI framework (based on Qt 4.8)
– Qt 5 possible (as overlay for SDK)
32 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Jolla / Sailfish OS
• Smartphone OS
– Builds on MeeGo / Mer / Nemo foundation
33 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
jolla.com
sailfishos.org
Ubuntu for Phones
• Apps: HTML5 and native (Qt)
– Qt 5 based
– QML toolkit
– www.ubuntu.com/phone
– developer.ubuntu.com/apps/qml/
34 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Symbian & Qt
– Works on S60 3.1+
(E71, E72, 5800, N97, N8, X7, 700, 808, etc.) *
– Last Symbian phone: Nokia 808 PureView
– Qt 4.8
35 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
* Qt can be installed on all compatible devices. Not all devices are enabled for Qt content in the Nokia Store. Current list of Nokia Store device deployment support for Qt apps:
http://www.developer.nokia.com/Distribute/Packaging_and_signing.xhtml
Series 60
1.0
Series 60
2.0
(+ 3 FPs)
S60
3.0
S60
3.1
S60
3.2
S60 5.0
=
Symbian^1
Symbian^2 Symbian^3
Qt Compatibility
Nokia E71
(S60 3.1, 2008)
Qt Pre-Installed
Nokia 700
(Nokia Belle, 2011)
Symbian Anna
Nokia Belle
Deprecated
(only Qt 4)
Harmattan
• Open Source Linux for Mobile Computers
– Based on Maemo and MobLin
→ transformed to Tizen by Samsung
(HTML5-based apps)
• Nokia N9
– MeeGo 1.2 Harmattan
– Only product with OS
36 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Deprecated
(only Qt 4)
Raspberry Pi
• Qt 5 runs on Raspberry Pi
– $25 / $35 hardware
– 3D-accelerated Qt Quick, 60 FPS
– www.raspberrypi.org
37 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Qt for Device Creation
38 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
* http://qt.digia.com/QtEnterpriseEmbedded
Qt for Device Creation
39 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
• 2D Renderer for devices without
OpenGL
• Wayland for multi-process support
• Qt Creator deployment + wizard for
flashing device images
• Virtual keyboard
blog.qt.digia.com/blog/2014/07/04/making-an-android-
device-boot-to-qt/
Qt for Device Creation
40 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
* http://qt.digia.com/QtEnterpriseEmbedded
Qt Cloud Services
41 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
• Backend as a service
+ Platform as a service
– APIs to store & retrieve cloud data
– Included server maintenance,
load balancing & backup
– Server-side dev possible
– C++ & QML support, REST access
• https://qtcloudservices.com/
Qt Cloud Services
42 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Qt WebEngine
• Module for embedding web contents
– Simple to create a fully functional
browser
– Full support for Qt Widgets and
Qt Quick
– Great performance
– Full compliance with latest web
standards
• LGPLv3 or commercial
43 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
44
Qt – How?
Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Developer Environment Setup
• One-click installation
– IDE
– Tool-chains
– Documentation
– Examples
45 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Compiler
Qt SDK
works on
Windows,
Linux, Mac
Tool-Chain
DocumentationIDE
Examples
Qt Creator
• Complete IDE
– C++, QML, JavaScript
– Same dev experience for all platforms
• Development
– One-click deployment to desktop, iOS, Android, WP
– Syntax highlighting, autocompletion
– UI Designer
– Static code analyser
– Profiler
46 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
47 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Start: Application UI
C++ QML / JavaScript
HTML / JavaScript / CSS Other
QWidgets QPainter
OpenGLQtWebengine
All these can be mixed in
the same app if needed
Qt Quick Qt Quick Controls
QWidgets
• UI Elements (QLabel, QPushButton, etc.)
– Use platform UI design
– Support style sheets
– Drag & drop UI designer
48 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Great for desktop.
Static layouts make effects difficult.
Small UI, different interaction paradigms.
QPainter
• Low level 2D paining engine
– Forms, gradients, transparency, transforms
– QGraphicsView: scene graph for 2D scene
management
49 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Well-known concepts
Full and direct control over appearance
No ready-made common UI components available
Development focus on Qt Quick
Qt Quick
• Qt Quick
– QML language and JavaScript
– Declarative syntax, animations and states
– Drag & drop UI designer
50 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Very easy to make slick, fluid UIs.
Most important for mobile devices!
Still different UI controls for some platforms (Blackberry)
* Project page: https://bugreports.qt-project.org/browse/QTCOMPONENTS
Qt Quick Controls
51 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
• QML UI controls
– Native look and feel
– Custom design: Style API
• Layout managers
OpenGL
• Low level
– Basic setup provided by Qt
– Includes OpenGL ES 3.0 / 3.1
– Or: integration with QtQuick
52 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Complete control over GL
Good if you have existing codebase & assets, cross-platform
Pure OpenGL is hard work
Angry Birds and Bounce
by Rovio
Qt Webengine
• Open source browser engine
– Display HTML(5) and JavaScript
– Combine Qt QML / C++ and web code if needed to get best of both worlds
• Qt WebView: embed native web view on Android & iOS
53 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Use your existing web skills to create the UI
Reuse web components (online help, etc.)
Complex UIs and interaction probably more difficult
Less performance than native code (but improving)
54 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Recommendations ...
QPainter
Qt Quick
OpenGL
Web
QWidgets
Desktop App Mobile App Game
Recommended
OK
Not recommended
55 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Hello World
#include <QApplication>
#include <QPushLabel>
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
QLabel helloLabel("Hello World");
helloLabel.setAlignment(Qt::AlignCenter);
helloLabel.showMaximized();
return app.exec();
}
import QtQuick 2.4
Rectangle {
width: 360
height: 360
Text {
anchors.centerIn: parent
text: "Hello World"
}
}
~ 300 lines of code,
~ 15 files
Native
Symbian C++
Qt C++
Qt Quick
QML language
QML
• Describe UI by tree structure of
property bindings
– Properties dynamically
evaluated
– Communication through
signals & slots
– Bindings to C++ code
possible
– Animate properties using
states and transitions
56 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
import QtQuick 2.4
Rectangle {
width: 200
height: 200
Image {
source: "QtLogo.png"
anchors.centerIn: parent
}
}
QML
• Interactivity
– Interact with
mouse / touch
– Execute JavaScript in
signal handlers
57 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
import QtQuick 2.4
Rectangle {
width: 200
height: 200
Image {
source: "QtLogo.png"
anchors.centerIn: parent
}
MouseArea {
anchors.fill: parent
onClicked: parent.color = "green"
}
}
QML
• Dynamic property update
– Move image with mouse
58 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
import QtQuick 2.4
Rectangle {
width: 200
height: 200
Image {
source: "QtLogo.png"
x: myMouse.mouseX
y: myMouse.mouseY
}
MouseArea {
id: myMouse
hoverEnabled: true
anchors.fill: parent
onClicked: parent.color = "green"
}
}
QML
• Qt Quick Controls
– Native-looking UI
controls
– Custom styling possible
– Not 100% cross-platform
(e.g., Blackberry: own UI)
59 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
import QtQuick 2.3
import QtQuick.Controls 1.2
ApplicationWindow {
title: "My Application"
Button {
text: "Push Me"
anchors.centerIn: parent
}
}
60 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Qt Quick & Qt C++
Quick Prototype
Viewer on PC & mobile:
Testing 100% pure QML directly
Deployable App
Qt C++ app to load and show QML
Can include C++ for app logic
61
Qt – When?
Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Timeline
• Qt 5.4
– December 10th, 2014
– http://qt-project.org/wiki/Qt-5.4-release
• Qt 5.4.1
– Bug-fix release
– https://bugreports.qt-project.org/browse/QTBUG/fixforversion/14400
• Qt 5.5
– April 28th, 2015
– Bluetooth (LE) on Windows RT, iOS
– In-App Purchasing on Windows RT
– Native dialogs and more pop-ups on iOS
– Improved QML/JS <> C++ integration
– New garbage collector
– http://qt-project.org/wiki/Qt-5.5-release
– https://bugreports.qt-project.org/browse/QTBUG/fixforversion/14200
• Qt 6.0
– https://bugreports.qt-project.org/browse/QTBUG/fixforversion/12127
62 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
63
Qt – Now!
Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
64 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Download
qt.io/download/
Where to find help?
• Qt SDK
– Help, examples
• Discussion boards, wikis
– Qt Project: qt-project.org
• Community
– www.qtcentre.org
65 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Thank You.
66 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
Andreas Jakl [@andijakl]
mopius.com

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Qt App Development - Cross-Platform Development for Android, iOS, Windows Phone and more!

  • 1. Andreas Jakl [@andijakl] mopius.com Qt App Development 1 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com Digia, Qt and their respective logos are trademarks of Digia Corporation in Finland and/or other countries worldwide.
  • 2. Andreas Jakl • Startup founder & app developer – @andijakl, @mopius – andreas.jakl@mopius.com – mopius.com • History – Nokia: Technology Wizard – FH Hagenberg, Mobile Computing: Assistant Professor – Siemens / BenQ Mobile: Augmented Reality-Apps 2 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
  • 3. 3 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com From Your Idea to the Store Choose target market(s) for your app Europe, America, Africa, Asia, etc. Select target platform(s) Andorid, iOS, Windows Phone, BlackBerry, Firefox OS Choose development technology HTML5, C++, C#, Java, ObjectiveC, Swift Design, develop & test Distribute ... and get famous and rich!
  • 4. 4 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com Agenda What? Why? Where? How? When? Now!
  • 5. 5 Qt – What? Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
  • 6. Multi Screen • Computing world today – Laptop, Phones, tablets – TV – Car IVI – Wearables – Virtual and augmented reality – Specialized devices – etc. 6 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
  • 7. 7 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com Multi Platform App Development Windows | Mac | Linux Android | iOS | WinRT | BlackBerry* | Sailfish* Embedded Linux | Embedded Android | Windows Embedded Integrity | QNX | VxWorks Native apps Use operating system and its functions directly (different code for networking, GPS, etc.) * Community support only
  • 8. 8 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com Multi Platform App Development Native apps Use operating system and its functions directly (different code for networking, GPS, etc.) Your App Qt framework Same code works on all platforms, covers many usecases (GPS, etc.) (if needed, direct access is still possible) * Community support only Windows | Mac | Linux Android | iOS | WinRT | BlackBerry* | Sailfish* Embedded Linux | Embedded Android | Windows Embedded Integrity | QNX | VxWorks
  • 9. 9 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
  • 10. 10 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com What is Qt? Developer Publish to – Windows – Linux – Mac – Embedded – Android – iOS – etc. App Source Code Using Qt SDK for – Dev. environment – Testing – Translation – Help Using Qt framework for – User Interface – Networking – Location (GPS) – Web integration – ...
  • 11. 11 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com Qt 5 Demo www.youtube.com/watch?v=vhWS_bN-T3k
  • 12. 12 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com Qt 5.4 youtube.com/watch?v=wMs1pSZMnG0
  • 13. 13 Qt – Why? Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
  • 14. Qt – What’s Inside? • Cross-Platform – Same source code for 15 platforms – Maximum performance – native apps! • Generic – User Interface – Declarative UI, animation, gestures, multi-touch, 3D (OpenGL) – Web (Chromium-based) & JavaScript engine included – Multimedia (audio, video), Sensors, Bluetooth, Positioning – Networking, XML – SQL, files, app settings – Container classes, object communication, threading, unit testing – doc.qt.io/qt-5/qtmodules.html • Extend – Include any 3rd party C++ library / code 14 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
  • 15. 15 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com Qt: On Your PC already! … and many, many more! All trademarks and logos are property of their respective owners. More information: http://www.qt.io/qt-in-use/ http://lumiaconversations.microsoft.com/2011/03/15/10-qt-use-cases-you-didnt-know/
  • 16. 16 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
  • 17. 17 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com The Qt Company Trolltech Nokia Digia Qt Company (owned by Digia)
  • 18. 18 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com Qt.io One product. One ecosystem. Integrates: qt-project.org and qt.digia.com
  • 19. 19 Qt: Free vs. Commercial Open Source qt.gitorious.org Qt can be used in commercial, closed-source apps Changes to Qt source must be shared Additional UI controls (charts, etc.) More modules (Qt Quick Compiler, etc.) More tools (profiling) Support options Free (LGPL v2.1 / v3 license) Commercial Licenses Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com qt-project.org/legal.html
  • 20. Qt Packages • Community – open source – GPL / LGPL (v2.1 -> v3) • Indie Mobile – commercial subscription, mobile platforms only – €20 / month • Professional – commercial subscription, mobile + desktop – €109 / month • Enterprise – perpetual commercial license, embedded + mobile + desktop, device creation 20 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
  • 21. Embedded & Internet of Things • Increasing use of touch screens • Need for simple to configure & flexible stack • Machine to Machine (M2M) communication 21 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
  • 22. 22 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com Cross-Platform Alternatives C# Commercial HTML5 (e.g., Apache Cordova) JavaScript Open Source many more …
  • 23. 23 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com Number of Target Platforms
  • 24. 24 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com Top 10 App Quality
  • 25. 25 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com Time Savings
  • 26. 26 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com Cost Performance Ratio
  • 27. 27 Qt – Where? Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
  • 28. 28 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com Technologies & Platforms C++ OpenGL QML HTML5 CSS3 JavaScript Windows Mac Linux Embedded Linux Embedded Android Windows Embedded Integrity QNX VxWorks WinRT Android iOS BlackBerry Sailfish
  • 29. Android • Full integration – Android 2.3.3+ (API level 10) – Originally based on community port – Optional: Ministro – Avoid multiple Qt installations on device – Issues with Android 5.0 • Qt 5.2+ 29 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
  • 30. iOS • Full iOS support – iPhone 3GS+ – iPad 2+ • Device deployment & publishing – Qt Creator integration – OS X & Xcode required – iOS Developer Program membership required • Qt 5.2+ 30 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
  • 31. Qt on Windows Runtime • Compliant with Windows Store – Windows 8.1+ – Windows Phone 8.1+ • Feature set – Qt Essential modules – Geopositioning – Qt Quick Enterprise Controls – Engin.io – Qt Quick Compiler – Multimedia • Qt 5.4+ 31 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
  • 32. BlackBerry 10 • Qt as major dev framework in BB10 – QNX Operating System – Cascades UI framework (based on Qt 4.8) – Qt 5 possible (as overlay for SDK) 32 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
  • 33. Jolla / Sailfish OS • Smartphone OS – Builds on MeeGo / Mer / Nemo foundation 33 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com jolla.com sailfishos.org
  • 34. Ubuntu for Phones • Apps: HTML5 and native (Qt) – Qt 5 based – QML toolkit – www.ubuntu.com/phone – developer.ubuntu.com/apps/qml/ 34 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
  • 35. Symbian & Qt – Works on S60 3.1+ (E71, E72, 5800, N97, N8, X7, 700, 808, etc.) * – Last Symbian phone: Nokia 808 PureView – Qt 4.8 35 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com * Qt can be installed on all compatible devices. Not all devices are enabled for Qt content in the Nokia Store. Current list of Nokia Store device deployment support for Qt apps: http://www.developer.nokia.com/Distribute/Packaging_and_signing.xhtml Series 60 1.0 Series 60 2.0 (+ 3 FPs) S60 3.0 S60 3.1 S60 3.2 S60 5.0 = Symbian^1 Symbian^2 Symbian^3 Qt Compatibility Nokia E71 (S60 3.1, 2008) Qt Pre-Installed Nokia 700 (Nokia Belle, 2011) Symbian Anna Nokia Belle Deprecated (only Qt 4)
  • 36. Harmattan • Open Source Linux for Mobile Computers – Based on Maemo and MobLin → transformed to Tizen by Samsung (HTML5-based apps) • Nokia N9 – MeeGo 1.2 Harmattan – Only product with OS 36 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com Deprecated (only Qt 4)
  • 37. Raspberry Pi • Qt 5 runs on Raspberry Pi – $25 / $35 hardware – 3D-accelerated Qt Quick, 60 FPS – www.raspberrypi.org 37 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
  • 38. Qt for Device Creation 38 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com * http://qt.digia.com/QtEnterpriseEmbedded
  • 39. Qt for Device Creation 39 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com • 2D Renderer for devices without OpenGL • Wayland for multi-process support • Qt Creator deployment + wizard for flashing device images • Virtual keyboard blog.qt.digia.com/blog/2014/07/04/making-an-android- device-boot-to-qt/
  • 40. Qt for Device Creation 40 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com * http://qt.digia.com/QtEnterpriseEmbedded
  • 41. Qt Cloud Services 41 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com • Backend as a service + Platform as a service – APIs to store & retrieve cloud data – Included server maintenance, load balancing & backup – Server-side dev possible – C++ & QML support, REST access • https://qtcloudservices.com/
  • 42. Qt Cloud Services 42 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
  • 43. Qt WebEngine • Module for embedding web contents – Simple to create a fully functional browser – Full support for Qt Widgets and Qt Quick – Great performance – Full compliance with latest web standards • LGPLv3 or commercial 43 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
  • 44. 44 Qt – How? Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
  • 45. Developer Environment Setup • One-click installation – IDE – Tool-chains – Documentation – Examples 45 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com Compiler Qt SDK works on Windows, Linux, Mac Tool-Chain DocumentationIDE Examples
  • 46. Qt Creator • Complete IDE – C++, QML, JavaScript – Same dev experience for all platforms • Development – One-click deployment to desktop, iOS, Android, WP – Syntax highlighting, autocompletion – UI Designer – Static code analyser – Profiler 46 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
  • 47. 47 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com Start: Application UI C++ QML / JavaScript HTML / JavaScript / CSS Other QWidgets QPainter OpenGLQtWebengine All these can be mixed in the same app if needed Qt Quick Qt Quick Controls
  • 48. QWidgets • UI Elements (QLabel, QPushButton, etc.) – Use platform UI design – Support style sheets – Drag & drop UI designer 48 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com Great for desktop. Static layouts make effects difficult. Small UI, different interaction paradigms.
  • 49. QPainter • Low level 2D paining engine – Forms, gradients, transparency, transforms – QGraphicsView: scene graph for 2D scene management 49 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com Well-known concepts Full and direct control over appearance No ready-made common UI components available Development focus on Qt Quick
  • 50. Qt Quick • Qt Quick – QML language and JavaScript – Declarative syntax, animations and states – Drag & drop UI designer 50 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com Very easy to make slick, fluid UIs. Most important for mobile devices! Still different UI controls for some platforms (Blackberry) * Project page: https://bugreports.qt-project.org/browse/QTCOMPONENTS
  • 51. Qt Quick Controls 51 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com • QML UI controls – Native look and feel – Custom design: Style API • Layout managers
  • 52. OpenGL • Low level – Basic setup provided by Qt – Includes OpenGL ES 3.0 / 3.1 – Or: integration with QtQuick 52 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com Complete control over GL Good if you have existing codebase & assets, cross-platform Pure OpenGL is hard work Angry Birds and Bounce by Rovio
  • 53. Qt Webengine • Open source browser engine – Display HTML(5) and JavaScript – Combine Qt QML / C++ and web code if needed to get best of both worlds • Qt WebView: embed native web view on Android & iOS 53 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com Use your existing web skills to create the UI Reuse web components (online help, etc.) Complex UIs and interaction probably more difficult Less performance than native code (but improving)
  • 54. 54 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com Recommendations ... QPainter Qt Quick OpenGL Web QWidgets Desktop App Mobile App Game Recommended OK Not recommended
  • 55. 55 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com Hello World #include <QApplication> #include <QPushLabel> int main(int argc, char *argv[]) { QApplication app(argc, argv); QLabel helloLabel("Hello World"); helloLabel.setAlignment(Qt::AlignCenter); helloLabel.showMaximized(); return app.exec(); } import QtQuick 2.4 Rectangle { width: 360 height: 360 Text { anchors.centerIn: parent text: "Hello World" } } ~ 300 lines of code, ~ 15 files Native Symbian C++ Qt C++ Qt Quick QML language
  • 56. QML • Describe UI by tree structure of property bindings – Properties dynamically evaluated – Communication through signals & slots – Bindings to C++ code possible – Animate properties using states and transitions 56 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com import QtQuick 2.4 Rectangle { width: 200 height: 200 Image { source: "QtLogo.png" anchors.centerIn: parent } }
  • 57. QML • Interactivity – Interact with mouse / touch – Execute JavaScript in signal handlers 57 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com import QtQuick 2.4 Rectangle { width: 200 height: 200 Image { source: "QtLogo.png" anchors.centerIn: parent } MouseArea { anchors.fill: parent onClicked: parent.color = "green" } }
  • 58. QML • Dynamic property update – Move image with mouse 58 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com import QtQuick 2.4 Rectangle { width: 200 height: 200 Image { source: "QtLogo.png" x: myMouse.mouseX y: myMouse.mouseY } MouseArea { id: myMouse hoverEnabled: true anchors.fill: parent onClicked: parent.color = "green" } }
  • 59. QML • Qt Quick Controls – Native-looking UI controls – Custom styling possible – Not 100% cross-platform (e.g., Blackberry: own UI) 59 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com import QtQuick 2.3 import QtQuick.Controls 1.2 ApplicationWindow { title: "My Application" Button { text: "Push Me" anchors.centerIn: parent } }
  • 60. 60 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com Qt Quick & Qt C++ Quick Prototype Viewer on PC & mobile: Testing 100% pure QML directly Deployable App Qt C++ app to load and show QML Can include C++ for app logic
  • 61. 61 Qt – When? Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
  • 62. Timeline • Qt 5.4 – December 10th, 2014 – http://qt-project.org/wiki/Qt-5.4-release • Qt 5.4.1 – Bug-fix release – https://bugreports.qt-project.org/browse/QTBUG/fixforversion/14400 • Qt 5.5 – April 28th, 2015 – Bluetooth (LE) on Windows RT, iOS – In-App Purchasing on Windows RT – Native dialogs and more pop-ups on iOS – Improved QML/JS <> C++ integration – New garbage collector – http://qt-project.org/wiki/Qt-5.5-release – https://bugreports.qt-project.org/browse/QTBUG/fixforversion/14200 • Qt 6.0 – https://bugreports.qt-project.org/browse/QTBUG/fixforversion/12127 62 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
  • 63. 63 Qt – Now! Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
  • 64. 64 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com Download qt.io/download/
  • 65. Where to find help? • Qt SDK – Help, examples • Discussion boards, wikis – Qt Project: qt-project.org • Community – www.qtcentre.org 65 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com
  • 66. Thank You. 66 Qt App Development v6.0.0 January 27, 2015 © 2015 Andreas Jakl mopius.com Andreas Jakl [@andijakl] mopius.com