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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 FREE CHAPTER 2. Building Applications with Qt Creator 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

Accessing the camera


To access the camera when it is supported by the hardware and Qt Multimedia, use the Camera type and its associated types to control the camera's capture behavior, exposure, flash, focus, and image processing settings. A simple use of the camera to show a viewfinder looks like the following code:

import QtQuick 2.3
import QtMultimedia 5.0

Item {
    width: 640
    height: 480

    Camera {
        id: camera
    }

    VideoOutput {
        source: camera
        anchors.fill: parent
    }
}

In short, the Camera type acts like a source for the video just as a MediaPlayer instance does.

The Camera type provides a few properties to control its behavior. They are:

  • imageCapture: This is an instance of CameraCapture, which defines how the camera should capture an image

  • videoRecording: This is an instance of CameraRecorder, which defines how the camera should capture a video

  • exposure: This is an instance of CameraExposure, which controls the various options for the exposure...

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