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Application Development with Qt Creator - Second Edition

You're reading from   Application Development with Qt Creator - Second Edition Design and build dazzling cross-platform applications using Qt and Qt Quick

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Product type Paperback
Published in Nov 2014
Publisher Packt
ISBN-13 9781784398675
Length 264 pages
Edition 2nd Edition
Languages
Tools
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Toc

Table of Contents (15) Chapters Close

Preface 1. Getting Started with Qt Creator 2. Building Applications with Qt Creator FREE CHAPTER 3. Designing Your Application with Qt Designer 4. Qt Foundations 5. Developing Applications with Qt Widgets 6. Drawing with Qt 7. Doing More with Qt Quick 8. Multimedia and Qt Quick 9. Sensors and Qt Quick 10. Localizing Your Application with Qt Linguist 11. Optimizing Performance with Qt Creator 12. Developing Mobile Applications with Qt Creator 13. Qt Tips and Tricks Index

Obtaining a device's position – a simple example

Let's close this chapter with a simple example that returns the device's position, accelerometer, gyroscope, ambient light, and magnetometer readings. Here's how our application looks when running on a Nexus 7:

Obtaining a device's position – a simple example

Note that my Nexus 7 does not have a magnetometer, so these readings aren't being updated.

First, we need to ensure that we include the positioning and sensor modules in our .pro file (if we don't, the application will compile but fail to launch):

TEMPLATE = app

QT += qml quick positioning sensors

SOURCES += main.cpp

RESOURCES += qml.qrc
# Additional import path used to resolve QML modules in Qt Creator's code model
QML_IMPORT_PATH =

# Default rules for deployment.
include(deployment.pri)

Next, we move on to the QML itself. This is long, but straightforward:

import QtQuick 2.3
import QtQuick.Window 2.2
import QtPositioning 5.2
import QtSensors 5.0

Window {
    visible: true
    width: 360
...
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