CPSC 594B: Software Engineering Project

1. CPSC 594B: Software Engineering Project Lecture 1: Introduction to HTML5 issaa@ucalgary.ca Lecturer: Ayman Issa Office: ICT 555

2. Agenda • Lesson Objectives • The need for new HTML version • Features • Enhancements • Coquille Improvement • Q&A • References

3. Objectives • By the end of this lesson, students should be able to: • Name three motivations for HTML5. • Explain the main features of HTML5. • Implement at least three HTML5 tags. • Identify two areas for improvement in Coquille’s implementation.

4. The need • Current World Wide Web is a mixture of features introduced by various specifications. • An attempt to define a single markup language that can be written in either HTML or XHTML syntax. • A potential candidate for cross-platform mobile applications.

5. Features • Backwards compatible with legacy Applications • Author familiarity • Lenient and forgiving syntax • Convenient shorthand syntax • Strict XML Syntax • Integrate directly with other XML vocabularies

6. Overview of Enhancements • Structure and Semantics • Embedded Content and Multimedia • Forms • Repetition Model • Others

7. Structure and Semantics

8. Structure <header> <divid="header"> <nav> <div id="nav"> <section> <divid="content"> <aside> <divid="right"> <article> <divclass="article"> <footer> <divid="footer">

9. Dates and Times • The time Element • <timedatetime="2007-08-02T23:30Z"> Fri, Aug 03 2007 at 09:30</time>

10. Meter • Representing scalar measurements or fractional values • Useful for: • User Ratings (e.g. YouTube Videos) • Seach Result Relevance • Disk Quota Usage

11. Using Meter • <meter>60%</meter> • <meter>3/5</meter> • <meter>6 blocks used (out of 10 total)</meter> • <metervalue="0.6">Medium</meter>

12. Progress • Show completion progress of a task • Progress bars are widely used in applications • Useful for: • Indicate loading progress of an AJAX application • Show user progress through a series of forms • Making impatient users wait

13. Using Progress • <progress>Step 3 of 6</progress> • <progress>50% Complete</progress> • <progressvalue="0.5"> Half way!</progress>

14. M • Marked or Highlighted text • Indicates point of interest or relevance • Useful for: • Highlighting relevant code in a code sample • Highlighting search keywords in a document (e.g. in Google Cache)

15. Using M • <p>The highlighted part below is where the error lies:</p><pre><code>var i: Integer;begin i := <m>1.1</m>;end.</code></pre>

16. Embedded Content and Multimedia

17. Canvas • Dynamic and interactive graphics • Draw images using 2D drawing API • Lines, curves, shapes, fills, etc. • Useful for: • Graphs • Applications • Games and Puzzles • And more…

18. Canvas Examples: Graphs • Draws graphs from any data source, such as a table

19. Canvas Examples: Applications • CanvasPaint • Clone of MS Paint built with Canvas • Could be used to build a Shared Whiteboard application

20. Video and Audio • Videos have become very popular • Currently difficult to embed videos in HTML • Flash has become the de facto standard • Adding native support to browsers

21. Using Video and Audio • <videosrc="movie.ogg"id="video">...</video> • <buttononclick="video.play();"> Play</button> • <audiosrc="/tunes/boom.mp3" controls="true"><a href="/tunes/boom.mp3">Listen</a> </audio>

22. Forms

23. Form Controls • HTML 4 controls are too limited • Several new types added

24. Form Controls: Dates and Times • <inputtype="datetime"> • <inputtype="date"> • <inputtype="time"> • And more…

25. Form Controls: Numbers • <inputtype="number"> • <inputtype="range">

26. Form Controls: Email and URIs • <inputtype="email"> • <inputtype="url">

27. Form Controls: Combo Boxes • <inputlist="title-list"><datalistid="title-list"> <optionvalue="..."></datalist>

28. Form Validation • New attributes to describe validity constraints for the expected input • required, pattern, min, max, etc. • New DOM APIs allow scripts to detect and deal with user input errors more easily

29. Repetition Model

30. Repetition Model • Allows client side processing to repeat sections based on templates • Traditionally required scripts or server side interaction to add additional sections • Useful for: • Adding multiple players to a game • Adding multiple, alternative contact details (e.g. home phone, work phone, mobile phone, etc.)

31. Colonel Jack O'Neill Remove Major Sam Carter Remove Civilian Daniel Jackson Remove Using the Repetition Model Team Members <trrepeat-template="member"repeat="0"> <td><inputtype="text"name="member0.rank"></td> <td><inputtype="text"name="member0.name"></td> <td><buttontype="remove">Remove</button></td> </tr> <trrepeat-template="member"repeat="1"> <td><inputtype="text"name="member1.rank"></td> <td><inputtype="text"name="member1.name"></td> <td><buttontype="remove">Remove</button></td> </tr> <trid="member"repeat="template"repeat-start="2"> <td><inputtype="text"name="member[member].rank"></td> <td><inputtype="text"name="member[member].name"></td> <td><buttontype="remove">Remove</button></td> </tr> <trid="member"repeat="template"repeat-start="2"> <td><inputtype="text"name="member[member].rank"></td> <td><inputtype="text"name="member[member].name"></td> <td><buttontype="remove">Remove</button></td> </tr> Rank Name Remove Alien Teal’c Add Team Member Add Team Member Continue Remove <buttontype="add"template="member">Add Team Member</button>

32. Other Enhancements • GeoLocation Support: FF, Opera, Chrome, Safari, IE8. • Storage: • Session and Local • Web Databases • Application Cache

33. Discussion • What improvements can HTML5 make to Coquille?

34. Questions?

35. References • Wikipedia - http://en.wikipedia.org/wiki/HTML5 • HTML5 Doctor - http://html5doctor.com/ • Dive Into HTML5 - http://diveintohtml5.org/ • Keith J., HTML5 For Web Designers, 2010.