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  • Book Overview & Buying QT5 Blueprints
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QT5 Blueprints

QT5 Blueprints

By : Huang
4 (9)
Buy this Book
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QT5 Blueprints

QT5 Blueprints

4 (9)
By: Huang
Buy this Book

Overview of this book

If you are a programmer looking for a truly cross-platform GUI framework to help you save your time by side-stepping the incompatibility between different platforms and building applications using Qt 5 for multiple targets, then this book is most certainly intended for you. It is assumed that you have a basic programming experience of C++ and fundamental knowledge about Qt.
Table of Contents (12 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. Creating Your First Qt Application
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1. Creating Your First Qt Application
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Creating a new project
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Changing the layout of widgets
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Understanding the mechanism of signals and slots
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Connecting two signals
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Creating a Qt Quick application
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Connecting C++ slots to QML signals
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Summary
2
2. Building a Beautiful Cross-platform Clock
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2. Building a Beautiful Cross-platform Clock
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Creating a basic digital clock
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Tweaking the digital clock
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Saving and restoring settings
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Building on the Unix platforms
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Summary
3
3. Cooking an RSS Reader with Qt Quick
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3. Cooking an RSS Reader with Qt Quick
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Understanding model and view
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Parsing RSS Feeds by XmlListModel
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Tweaking the categories
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Utilizing ScrollView
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Adding BusyIndicator
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Making a frameless window
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Debugging QML
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Summary
4
4. Controlling Camera and Taking Photos
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4. Controlling Camera and Taking Photos
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Accessing the camera in Qt
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Controlling the camera
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Displaying errors on the status bar
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Permanent widgets in the status bar
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Utilizing the menu bar
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Using QFileDialog
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QML camera
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Summary
5
5. Extending Paint Applications with Plugins
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5. Extending Paint Applications with Plugins
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Drawing via QPainter
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Writing static plugins
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Writing dynamic plugins
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Merging plugins and main program projects
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Creating a C++ plugin for QML applications
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Summary
6
6. Getting Wired and Managing Downloads
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6. Getting Wired and Managing Downloads
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Introducing Qt network programming
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Utilizing QNetworkAccessManager
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Making use of the progress bar
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Writing multithreaded applications
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Managing a system network session
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Summary
7
7. Parsing JSON and XML Documents to Use Online APIs
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7. Parsing JSON and XML Documents to Use Online APIs
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Setting up Qt for Android
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Parsing JSON results
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Parsing XML results
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Building Qt applications for Android
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Parsing JSON in QML
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Summary
8
8. Enabling Your Qt Application to Support Other Languages
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8. Enabling Your Qt Application to Support Other Languages
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Internationalization of Qt applications
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Translating Qt Widgets applications
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Disambiguating identical texts
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Changing languages dynamically
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Translating Qt Quick applications
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Summary
9
9. Deploying Applications on Other Devices
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9. Deploying Applications on Other Devices
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Releasing Qt applications on Windows
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Creating an installer
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Packaging Qt applications on Linux
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Deploying Qt applications on Android
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Summary
10
10. Don't Panic When You Encounter These Issues
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10. Don't Panic When You Encounter These Issues
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Commonly encountered issues
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Debugging Qt applications
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Debugging Qt Quick applications
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Useful resources
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Summary
11
Index
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Index

Chapter 4. Controlling Camera and Taking Photos

Through this chapter, you'll find how easy it is to access and control a camera with Qt. The example in this chapter also demonstrates how to utilize the status bar and menu bar. In addition to the traditional Qt Widget applications, there is a QML camera example, which does the same thing as Qt/C++ but in a more elegant way. The following topics, which are covered in this chapter, will extend your application:

  • Accessing the camera in Qt
  • Controlling the camera
  • Displaying errors in the status bar
  • Displaying the permanent widgets in the status bar
  • Utilizing the menu bar
  • Using QFileDialog
  • Using the QML Camera
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Tech Concepts
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Programming languages
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