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ac6 >> ac6-training >> Operating Systems >> Linux >> Embedded GUIs with Qt

Q1 Embedded GUIs with Qt

Embedded GUIs with Qt

Objectives

Installing Qt 5 and the needed components on an embedded platform
Writing Qt applications
Discovering Qt key components
Understanding the proper use of threads in Qt applications

	Labs are conducted on target boards, that can be:
	Quad Cortex/A9-based "Sabre" boards from NXP, with Lauterbach JTAG probes.
	Dual Cortex/A9-based "Panda ES" boards from Texas Instruments, with Lauterbach JTAG probes.
	Atmel ARM9-based boards, with Lauterbach JTAG probes.

Course environment

Printed course material (in English)
One Linux PC for two trainees.
One target platform (i.MX6 Sabre or PandaBoard ES) for two trainees

Prerequisite

Good knowledge of C++ language

FIRST DAY

Introduction

History
Versions
Licenses
Components
Qt Quick

Qt basics

Hello world application
Compiling and cross-compiling a Qt application
The main mechanisms of Qt

MOC (Meta Object Compiler)
Main loop
Signals and slots
Introspection
Asynchronous calls

Creation of a Qt application on Linux

Creation of Qt projects
Compiling

Main classes

Base classes
Main widgets
Utilities

The development tools for Qt

QT Designer
QtCreator
Qmake

Exercise:

Hello world application

Qt widgets

Basic widgets

Labels, buttons, …

Layouts
Dialogs

Custom dialogs
Standard dialogs

Exercise:	Writing an application combining various widgets
Exercise:	Writing a custom dialog

SECOND DAY

Threading

Threading model
Launching a worker thread
Synchronization
Queuing work to the GUI thread
Timers

Exercise:

Writing a multi-threaded application

Custom widget

2D drawing
Handling mouse, touch screen and keyboard events

Exercise:

Moving an image on screen

Model/view

Model/View concept
Model/View widget vs Standard Widget
Standard models
Writing a custom model
Views

Exercise:

Using a QListView

THIRD DAY

Install

Low-level graphism

Frame buffer
Open GL ES and EGL
X Server
Wayland

Qt platform plugins

EGLFS
LinuxFB
XCB (X server)
Wayland

Low-level input subsystem

Input drivers
Tslib
Multi-touch protocol

Configuring input in Qt
Cross-compiling and installing Qt

Build system
Main options

Exercise:

cross-compiling and installing Qt5 on an embedded board

Open GL ES 1.1 and 2.0

Presentation of Open GL

Various Open GL versions

Base concepts

Notion of state in OpenGL
Vertices and Triangles
Transformations
Drawing
Textures
Shaders

OpenGL and OpenGL/ES
Drawing in OpenGL

Vertices and index arrays
Drawing items
Projections
Viewpoints

Transformation matrixes

Loading and initialization
Translations and rotations
Save and restore (Matrix stack)

OpenGL shaders

OpenGL Shading Language (GLSL)
Vertex shaders
Fragment shaders
Applying transformations

OpenGL rendering model

Surfaces
Rendering operators
Offscreen rendering

OpenGL in Qt 5

Raw Opengl with Qt OpenGL module (QGLWidget class)
Qt wrappers above OpenGL ES of Qt GUI module (QOpenGLContext)

Exercise:

Rotating cube

FOURTH DAY

Multimedia support

Multimedia in Linux

Gstreamer

Multimedia in Qt 5

QtMulimedia module
Audio, Video Camera, MediaPlayer and Radio

Exercise:

Playing a video file

Qt Quick

Elements and properties
Javascript

Main elements and properties

User input, state, model and views, …

Interactions between C++ and QML

Exercise:

Hello world application with Qt Quick

Duration	Cost	Calendar
4 days	2370 € HT
Last update: 25 May 2022
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