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Game Programming Using Qt Beginner's Guide

You're reading from   Game Programming Using Qt Beginner's Guide A complete guide to designing and building fun games with Qt and Qt Quick 2 using associated toolsets

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Product type Paperback
Published in Jan 2016
Last Updated in Feb 2025
Publisher
ISBN-13 9781782168874
Length 512 pages
Edition 1st Edition
Tools
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Authors (2):
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Witold Wysota Witold Wysota
Author Profile Icon Witold Wysota
Witold Wysota
Lorenz Haas Lorenz Haas
Author Profile Icon Lorenz Haas
Lorenz Haas
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Toc

Table of Contents (13) Chapters Close

Preface 1. Introduction to Qt FREE CHAPTER 2. Installation 3. Qt GUI Programming 4. Qt Core Essentials 5. Graphics with Qt 6. Graphics View 7. Networking 8. Scripting 9. Qt Quick Basics 10. Qt Quick A. Pop Quiz Answers Index

Time for action – making the clock functional

The final step in creating a clock is to make it actually show the current time. In JavaScript, we can query the current time using the Date object:

var currentDate = new Date()
var hours   = currentDate.getHours()
var minutes = currentDate.getMinutes()
var seconds = currentDate.getSeconds()

Therefore, the first thing that comes to mind is to use the preceding code to show the current time on the clock:

Item {
  id: clock
  property int hours:   currentDate.getHours()
  property int minutes: currentDate.getMinutes()
  property int seconds: currentDate.getSeconds()
  property var currentDate: new Date()
  // ...
}

This will indeed show the current time once you start the application, but the clock will not be updating itself as the time passes. This is because new Date() returns an object representing one particular moment in time (the date and time at the moment when the object was instantiated). What we need instead is to have the currentDate...

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