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Rollover rules

From: Dreamweaver CS3 Essential Training

Video: Rollover rules

One of the key challenges in Web development, is to produce art work that clearly communicates how to navigate through your site. Rollover graphics, which change when the user's mouse moves over them are great for adding visual cues that insure your audience knows an image has special meaning, or that it's a link. Rollovers are also great if you have limited space because you can put extra information within the changing graphic. For example, you can make a button that says "services", and when a visitor places his, or her mouse over the word, it can then change to say list of services that you offer. We've already seen rollovers to some extent. We've seen what can create links that change colors when you hover over them.

Rollover rules

One of the key challenges in Web development, is to produce art work that clearly communicates how to navigate through your site. Rollover graphics, which change when the user's mouse moves over them are great for adding visual cues that insure your audience knows an image has special meaning, or that it's a link. Rollovers are also great if you have limited space because you can put extra information within the changing graphic. For example, you can make a button that says "services", and when a visitor places his, or her mouse over the word, it can then change to say list of services that you offer. We've already seen rollovers to some extent. We've seen what can create links that change colors when you hover over them.

In the chapter on Cascading Style Sheets, we created these types of rollovers with purely Cascading Style Sheets, where we see the background of the links change color as we roll-over them. Now, these were accomplished purely through Cascading Style Sheets, and those are great for those sort of things. But if you want true rollover diversity, and true freedom to make all kinds of graphics, you need to create graphic rollovers. Of courses, this will require you to have an image editing program like Adobe {italic}Photoshop,{plain} or {italic}Fireworks.{plain} But we're not going to get into creating the actual images in this {italic}Dreamweaver{plain} program. There are plenty of different training titles on {italic}Photoshop,{plain} and {italic}Fireworks{plain} for the Web that you can check out all the lynda.com training library.

What we're going to concentrate on here is what to do with those images once we have them in {italic}Dreamweaver.{plain} Image, or graphic rollovers are a combination of XHTML, and JavaScript. JavaScript allows you to manipulate the user's browser to perform actions that aren't possible with plain XHTML code. {italic}Dreamweaver {plain}automatically writes all the necessary JavaScript code without you ever having to write the scripts, or even understand how they're constructed. Even if you get more familiar with JavaScript, you'll most likely continue using the automatic rollover capabilities in {italic}Dreamweaver,{plain} because it can literally save you days of programming. In this chapter we're going to look at how to create simple rollovers, what are called "disjointed rollovers", navigation bars with multiple states, and we'll even look at how to create {italic}Flash{plain} buttons, but before we get into that, there are couple of rules that we need to establish. First of all, rollovers require a minimum of two graphics, because when you rollover a graphic, and it changes it's not actually the graphic that's changing.

You're just instantly swapping one graphic for another, and to the viewer's eye it looks like that that graphic changed into something else. So, this means that you need a minimum of two graphics, one as an off-state, which is what the button looks like before the user touches it, and an on-state, which is what the graphical will look like when the users mouse rolls onto it. You can have other states in addition to on, and off, which will be getting into a little bit later, but another important roll to keep in mind, especially to keep in your own rollover graphics, is that each state of the rollover has to be in the exact same dimensions. So, if you have a button that's 75 pixels wide, and 25 pixels tall. Each one of the images that are used in that rollover also have to be 75 pixels wide, and 25 pixels tall.

Otherwise, the JavaScript will scale both to the same width, and height, which will cause one of the buttons to distort. So, for this reason, all the original reporting of this chapter share the same dimensions. Alright that said, let's go ahead and define our site. I've copied the folder 11_rollovers to our desktop, which contains all the files will be using for this chapter. Let's go back to {italic}Dreamweaver,{plain} and we'll choose, Site > Managed Sites. We certainly have a lot of sites racked up here so far. We'll go ahead and add a new one. We'll call this tea cloud 11, and we'll browse for that folder. Find it right there. Again, if you're on a Mac, you select it once, and click choose. If you're on {italic}Windows,{plain} you'll double-click to open the folder, and then click select.

And then we'll click on OK, Done. And here are the new files we'll be working with, and we'll begin in the very next movie by showing you how to create a simple rollover.

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This video is part of

Image for Dreamweaver CS3 Essential Training
Dreamweaver CS3 Essential Training

129 video lessons · 86905 viewers

Garrick Chow
Author

 
Expand all | Collapse all
  1. 1m 12s
    1. Welcome
      1m 12s
  2. 21m 0s
    1. HTML vs. XHTML
      3m 4s
    2. What is CSS?
      3m 48s
    3. What is XML?
      2m 11s
    4. What is DHTML?
      1m 9s
    5. What is JavaScript?
      1m 23s
    6. File naming conventions
      3m 22s
    7. What is an index page?
      6m 3s
  3. 46m 18s
    1. Setting up your workspace
      2m 39s
    2. The Welcome screen
      4m 11s
    3. Windows and Mac differences
      3m 18s
    4. The Insert bar
      4m 38s
    5. The Property Inspector
      1m 50s
    6. The Document toolbar
      6m 6s
    7. The Document window
      9m 11s
    8. Panels and panel groups
      6m 58s
    9. Saving workspace layouts
      2m 22s
    10. Defining a default browser
      5m 5s
  4. 24m 59s
    1. Defining a site
      9m 5s
    2. File and folder management
      3m 11s
    3. Understanding path structure
      3m 17s
    4. Adding content to a site
      6m 6s
    5. Creating a site map
      3m 20s
  5. 38m 39s
    1. Creating a new blank site
      6m 0s
    2. Creating and saving a new document
      7m 54s
    3. About DOCTYPE
      3m 59s
    4. Inserting images
      9m 26s
    5. Inserting text
      3m 35s
    6. Aligning text and images
      4m 9s
    7. Inserting meta tags
      3m 36s
  6. 45m 58s
    1. Link basics
      6m 4s
    2. Linking with Point to File
      5m 18s
    3. External links
      4m 15s
    4. Creating email links
      5m 49s
    5. Named anchors
      7m 37s
    6. Linking to a file
      7m 35s
    7. Image maps
      9m 20s
  7. 1h 8m
    1. About CSS
      4m 52s
    2. Anatomy of a style sheet
      4m 10s
    3. CSS and page properties
      10m 11s
    4. Moving an internal style sheet to an external style sheet
      6m 46s
    5. The CSS Styles panel
      3m 48s
    6. CSS selectors
      2m 37s
    7. Type selectors
      12m 13s
    8. ID selectors
      10m 21s
    9. Class selectors
      5m 42s
    10. Creating rollovers with pseudo-class selectors
      7m 22s
  8. 42m 54s
    1. CSS vs. the Font tag
      2m 42s
    2. Formatting text with the Property Inspector
      8m 41s
    3. What measurement should I use?
      3m 15s
    4. Managing white space with margins, padding, and line height
      8m 34s
    5. Using font lists
      5m 45s
    6. Aligning text
      2m 47s
    7. Creating lists
      5m 8s
    8. Creating Flash text
      6m 2s
  9. 43m 19s
    1. About tables
      1m 28s
    2. Tables in Code view
      2m 36s
    3. Creating and adding content to tables
      7m 40s
    4. Changing table borders with XHTML
      5m 46s
    5. Coloring tables with XHTML and CSS
      6m 41s
    6. Aligning table content
      6m 39s
    7. Sorting tables
      3m 6s
    8. Setting table widths
      4m 48s
    9. Creating rounded-corner tables
      4m 35s
  10. 28m 22s
    1. Dreamweaver's layout tools
      3m 8s
    2. Tracing images
      4m 58s
    3. Adding AP div tags
      7m 29s
    4. Working with Layout Tables
      6m 55s
    5. Adjusting table widths and nesting tables
      5m 52s
  11. 16m 19s
    1. What is a device?
      3m 14s
    2. Attaching a printer-friendly style sheet
      3m 5s
    3. Styling for print
      7m 41s
    4. Adobe Device Central
      2m 19s
  12. 29m 54s
    1. Rollover rules
      3m 31s
    2. Creating simple rollovers
      5m 36s
    3. Creating disjointed rollovers
      7m 12s
    4. Creating navigation bars with multiple states
      9m 21s
    5. Creating Flash buttons
      4m 14s
  13. 26m 32s
    1. Viewing the code
      6m 9s
    2. Editing in Code view
      3m 0s
    3. The Code toolbar
      5m 11s
    4. Working with Code Collapse
      4m 27s
    5. The Quick Tag Editor
      2m 20s
    6. Working with snippets
      5m 25s
  14. 32m 45s
    1. About forms
      3m 23s
    2. Adding text fields
      9m 52s
    3. Adding checkboxes and radio buttons
      5m 37s
    4. Adding lists and menus
      6m 5s
    5. Submitting form results
      3m 23s
    6. Styling form elements with CSS
      4m 25s
  15. 23m 17s
    1. Opening a new browser window
      9m 38s
    2. Creating a popup message
      2m 50s
    3. Validating text fields
      2m 42s
    4. Getting more behaviors
      7m 2s
    5. Removing extensions
      1m 5s
  16. 14m 58s
    1. External image editor preferences
      3m 18s
    2. Built-in image editing tools
      3m 11s
    3. Roundtrip editing from Dreamweaver to Fireworks or Photoshop
      4m 39s
    4. Copying and pasting
      3m 50s
  17. 34m 16s
    1. Templates in action
      5m 12s
    2. Creating a new template
      6m 36s
    3. Applying templates
      3m 36s
    4. Modifying a template
      1m 40s
    5. Adding repeating regions
      3m 28s
    6. Working with repeating regions
      3m 13s
    7. Adding optional regions
      3m 34s
    8. Creating a library item
      3m 48s
    9. Modifying a library item
      3m 9s
  18. 13m 2s
    1. Using the History panel
      4m 24s
    2. Saving History steps as commands
      3m 25s
    3. Using Find and Replace
      5m 13s
  19. 14m 44s
    1. W3C accessibility guidelines
      4m 6s
    2. Accessibility preferences
      1m 29s
    3. Inserting accessible images
      3m 2s
    4. Inserting accessible tables
      2m 53s
    5. Inserting accessible form objects
      3m 14s
  20. 26m 17s
    1. About media objects
      2m 6s
    2. Linking to audio and video files
      5m 56s
    3. Embedding audio and video files
      7m 7s
    4. Setting parameters
      4m 27s
    5. Inserting Flash content
      2m 37s
    6. Inserting Flash video
      4m 4s
  21. 28m 47s
    1. Getting site reports
      3m 35s
    2. Checking links sitewide
      3m 30s
    3. Signing up with Tripod
      6m 36s
    4. Entering remote info
      4m 13s
    5. Publishing your site
      5m 41s
    6. Updating and publishing pages
      5m 12s
  22. 44s
    1. Goodbye
      44s

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