Book Image

Learn Qt 5

By : Nicholas Sherriff
Book Image

Learn Qt 5

By: Nicholas Sherriff

Overview of this book

Qt is a mature and powerful framework for delivering sophisticated applications across a multitude of platforms. It has a rich history in the Linux world, is widely used in embedded devices, and has made great strides in the Mobile arena over the past few years. However, in the Microsoft Windows and Apple Mac OS X worlds, the dominance of C#/.NET and Objective-C/Cocoa means that Qt is often overlooked. This book demonstrates the power and flexibility of the Qt framework for desktop application development and shows how you can write your application once and deploy it to multiple operating systems. Build a complete real-world line of business (LOB) solution from scratch, with distinct C++ library, QML user interface, and QtTest-driven unit-test projects. This is a suite of essential techniques that cover the core requirements for most LOB applications and will empower you to progress from a blank page to shipped application.
Table of Contents (11 chapters)

Object hierarchy

Most real-world applications represent data in a hierarchical or relational manner, with the data rationalized into discrete objects. There is often a central "root" object, which parents several other child objects, either as singular objects or as a collection. Each discrete object has its own set of data items that can be any number of types. The key principles we want to cover are as listed:

  • A range of data types (string, integer, datetime) and an enumerated value
  • Object hierarchy
  • Multiple single child entities of the same type
  • Collections of entities

Balancing these goals with simplicity, the data diagram we will work toward is as follows:

The purpose of each of these models is described in the following table:

Model Description

This is the root of our object hierarchy and represents an individual or party our company has a relationship...