Mastering Qt 5 by Guillaume Lazar

By Guillaume Lazar

Master program improvement by means of writing succinct, powerful, and reusable code with Qt 5

About This Book

  • Unleash the facility of Qt five with C++14
  • Integrate valuable third-party libraries equivalent to OpenCV
  • Package and set up your program on a number of platforms

Who This publication Is For

This e-book will attract builders and programmers who wish to construct GUI-based purposes. wisdom of C++ is critical and the fundamentals of Qt will be helpful.

What you'll Learn

  • Create lovely UIs with Qt Widget and Qt Quick
  • Develop strong, cross-platform purposes with the Qt framework
  • Design GUIs with the Qt dressmaker and construct a library in it for UI preview
  • Handle person interplay with the Qt signal/slot mechanism in C++
  • Prepare a cross-platform undertaking to host a third-party library
  • Build a Qt software utilizing the OpenCV API
  • Use the Qt Animation framework to demonstrate beautiful effects
  • Deploy cellular apps with Qt and embedded platforms

In Detail

Qt 5.7 is an software improvement framework that offers an excellent person event and develops full-capability functions with Qt Widgets, QML, or even Qt 3D.

This e-book will deal with demanding situations in effectively constructing cross-platform functions with the Qt framework. Cross-platform improvement wishes a well-organized venture. utilizing this ebook, you have got a greater realizing of the Qt framework and the instruments to unravel severe concerns equivalent to linking, debugging, and multithreading. Your trip will commence with the hot Qt five positive aspects. then you definitely will discover diversified structures and discover ways to tame them. each bankruptcy alongside the best way is a logical step you must take to grasp Qt. the adventure will lead to an program that has been confirmed and is able to be shipped.

Style and approach

This is an easy-to-follow but entire consultant to development functions in Qt. every one bankruptcy covers more and more complicated themes, with topics grouped in line with their complexity in addition to their usefulness. choked with useful examples and causes, gaining knowledge of Qt includes every little thing you must take your purposes to the following level.

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Extra info for Mastering Qt 5

Sample text

Connect(ui->checkbox, &QCheckBox::toggled, this, &Task::checked); } ... setStrikeOut(checked); ui->checkbox->setFont(font); emit statusChanged(this); } We define a slot checked(bool checked) that will be connected to the checkbox::toggled signal. In our slot checked(), we strike out the checkbox text according to the bool checked value. This is done using the QFont class. We create a copy font from the checkbox->font(), modify it, and assign it back to ui->checkbox. If the original font was in bold, with a special size, its appearance would be guaranteed to stay the same.

A QWidget is a UI component. It can be a label, a textbox, a button, and so on. If you define a parent-child relationship between your window, layout, and other UI widgets, memory management of your application will be easier. Indeed, in this case, deleting the parent is enough because its destructor will take care of also deleting its child, which in turn will delete its children and so on. Our MainWindow class extends QMainWindow from the Qt framework. We have a ui member variable in the private fields.

QString: The returned QString is what the user has typed. There are a few more optional parameters we can safely ignore for our example. Distributing code responsibility Great, the user can now specify the task name when it's created. What if he makes an error when typing the name? The next logical step is to rename the task after we created it. We'll take a slightly different approach. We want our Task to be as autonomous as possible. If we attach it to another component (rather than MainWindow), this renaming feature has to keep working.

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