April 2018
Beginner
714 pages
18h 21m
English
book
Game Programming using Qt 5 Beginner's Guide - Second Edition
by Pavel Strakhov, Witold Wysota, Lorenz Haas
Content preview from Game Programming using Qt 5 Beginner's Guide - Second Edition
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Signals and slots
To trigger functionality as a response to something that happens in an application, Qt uses a mechanism of signals and slots. This is another important feature of the QObject class. It's based on connecting a notification (which Qt calls a signal) about a change of state in some object with a function or method (called a slot) that is executed when such a notification arises. For example, if a button is pressed, it emits (sends) a clicked() signal. If some method is connected to this signal, the method will be called whenever the button is pressed.
Signals can have arguments that serve as a payload. For example, an input box widget (QLineEdit) has a textEdited(const QString &text) signal that's emitted when the user edits ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.