Clock App

This sample application is reprinting of Think IT article relaesed on 3/11/2013.

This sample app is a clock app displaying current Date and time.

Tested Environment

  • Android 7.0
  • iOS 10.1.1

File Components

File Description
index.html The Startup page
js/app.js The JavaScript file handling implementation in the project
css/style.css The style Sheet for the project
images/*.png All image files needed to use this template

HTML Explanation

index.html

The following HTML body of index.html file is for displaying the current Date and time (see screenshot below):

<div id="wrapper">
    <div id="container">
        <img src="images/figure-0.png" class="figure" />
        <img src="images/figure-0.png" class="figure" />
        <img src="images/figure-colon.png" />
        <img src="images/figure-0.png" class="figure" />
        <img src="images/figure-0.png" class="figure" />
        <img src="images/figure-colon.png" />
        <img src="images/figure-0.png" class="figure" />
        <img src="images/figure-0.png" class="figure" />
        <div id="date"></div>
    </div>
    <img src="images/logo-monaca.png" style="position: absolute; left: 40px; top: 40px;" />
</div>

JavaScript Explanation

js/app.js

When the application is loaded, the clock() function is called every 1 seconds (1000 ms) by this statement:

setInterval(clock, 1000);

The clock() function is used to display the current date and time. First, it gets the current time (hour, minute and second) and then display the images (digit image) according to the time. Next, it gets the current date (day, month and year) and then display it in the format as defined in renderDay() and renderMonth() functions (see below screenshot). Here is content of the clock() function:

function clock() {
    // (3) Obtain "figure" class(image of the number)
    var figures = document.getElementsByClassName('figure');
    // (4) Obtain the "date" ID (Date display area)
    var date = document.getElementById('date');

    // (5) Obtain the current time
    var now = new Date();

    // (6) Set the digits for the hours
    figures[0].src = 'images/figure-' + tendigit(now.getHours()) + '.png';
    figures[1].src = 'images/figure-' + onedigit(now.getHours()) + '.png';

    // (7) Set the digits for the minutes
    figures[2].src = 'images/figure-' + tendigit(now.getMinutes()) + '.png';
    figures[3].src = 'images/figure-' + onedigit(now.getMinutes()) + '.png';

    // (7) Set the digits for the seconds
    figures[4].src = 'images/figure-' + tendigit(now.getSeconds()) + '.png';
    figures[5].src = 'images/figure-' + onedigit(now.getSeconds()) + '.png';

    // (8) Display the date
    date.textContent = renderDay(now.getDay()) + ", " + renderMonth(now.getMonth()) + " " + now.getDate() + ", " + now.getFullYear();
}