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Flash CS3 Professional Beyond the Basics
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Using functions


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Flash CS3 Professional Beyond the Basics

with Todd Perkins

Video: Using functions

Functions are another important building block of ActionScript 3.0. Let's talk about how to create a function and how to run a function. If you're following along, I'm working in 02_Functions.fla in the Chapter 02 folder in the Exercise Files folder. Again, just like the file in the last movie, this file is just a blank document with layer 1 renamed to actions. So let's select the first keyframe of the Actions layer and press Option+F9 on the Mac, or F9 on the PC, to open the Actions panel. Let's create a function called add numbers. To create a function, type the function keyword, all lowercase.
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  1. 3m 30s
    1. Welcome
      1m 20s
    2. Getting the most from this training
      1m 20s
    3. Using the exercise files
      50s
  2. 15m 28s
    1. Managing digital assets
      4m 9s
    2. Creating custom keyboard shortcuts
      5m 1s
    3. Creating custom color swatches
      3m 41s
    4. Creating a custom template
      2m 37s
  3. 14m 38s
    1. Working with variables
      3m 41s
    2. Using functions
      3m 30s
    3. Working with events
      2m 11s
    4. Using event listeners
      2m 42s
    5. Working with arrays
      2m 34s
  4. 29m 41s
    1. Understanding dynamic text fields
      2m 37s
    2. Loading text from an external file
      6m 42s
    3. Reading HTML from a text field
      5m 29s
    4. Applying CSS with ActionScript
      7m 0s
    5. Applying external CSS to a text field
      7m 53s
  5. 45m 27s
    1. Masking dynamic text
      4m 59s
    2. Dragging the Scroll Bar
      7m 3s
    3. Calculating a scroll percent
      5m 20s
    4. Setting scroll boundaries
      4m 9s
    5. Connecting the ScrollBar to the text field
      2m 55s
    6. Easing the text with the ScrollBar
      4m 12s
    7. Scrolling the text with buttons
      2m 38s
    8. Animating the scrolling text with the buttons
      4m 26s
    9. Setting boundaries for the scrolling text
      4m 26s
    10. Easing the text using the buttons
      1m 37s
    11. Connecting the ScrollBar to the Scroll buttons
      3m 42s
  6. 20m 46s
    1. Organizing a complex object into layers
      1m 51s
    2. Duplicating MovieClips
      1m 29s
    3. Undocking the timeline
      1m 20s
    4. Animating a complex MovieClip
      4m 36s
    5. Creating an animated Hinge effect
      5m 13s
    6. Creating complex animations
      6m 17s
  7. 28m 1s
    1. Controlling objects with buttons
      4m 6s
    2. Understanding frame labels
      3m 25s
    3. Using buttons to navigate labeled frames
      2m 30s
    4. Nesting code within MovieClips
      5m 8s
    5. Adding sound to the application
      2m 34s
    6. Adding drag interactivity to the robot
      6m 1s
    7. Animating the dragged robot
      4m 17s
  8. 20m 3s
    1. Understanding components
      2m 30s
    2. Using components to setup a form
      3m 45s
    3. Setting up the form to send an email
      3m 38s
    4. Working with form variables
      6m 11s
    5. Skinning components
      3m 59s
  9. 27m 40s
    1. Using transparency in a video
      4m 16s
    2. Working with embedded video
      3m 38s
    3. Animating a VideoClip
      2m 53s
    4. Creating an advanced animation with video
      2m 40s
    5. Working with the bitmap data class
      3m 37s
    6. Working with the bitmap class
      1m 40s
    7. Copying the video to create a reflection
      1m 35s
    8. Reflecting the video
      2m 42s
    9. Enhancing a video reflection with a mask
      4m 39s
  10. 1h 38m
    1. Viewing the finished MP3 player
      1m 45s
    2. Understanding the project flow
      2m 52s
    3. Preparing to build the MP3 player
      5m 11s
    4. Understanding classes and packages
      5m 32s
    5. Creating the MP3 player class
      9m 59s
    6. Loading sounds from external files
      9m 20s
    7. Accessing ID3 tag information
      6m 11s
    8. Controlling sound playback with Play and Pause buttons
      11m 3s
    9. Changing tracks
      12m 1s
    10. Displaying the current volume
      9m 33s
    11. Changing the volume
      6m 40s
    12. Wiring the progress bar
      8m 4s
    13. Building the progress bar slider
      10m 4s
  11. 5m 36s
    1. Making Flash movies accessible
      1m 49s
    2. Adding a name and description to your Flash movie
      52s
    3. Accessibility and text fields
      2m 55s
  12. 12m 2s
    1. Understanding Flash Mobile
      35s
    2. Exploring Device Central
      1m 45s
    3. Updating Device Profiles
      1m 7s
    4. Creating a Flash file from Device Central
      2m 7s
    5. Creating and testing Flash Lite applications
      2m 48s
    6. Downloading the Flash Lite player for Windows Mobile
      1m 44s
    7. Getting a Flash Lite application onto your phone
      1m 56s
  13. 27s
    1. Goodbye
      27s

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Flash CS3 Professional Beyond the Basics
5h 21m Intermediate Dec 06, 2007

Viewers: in countries Watching now:

Through several hands-on tutorials, instructor Todd Perkins shows how to best build dynamic, streamlined sites using Flash CS3 Professional. Learn how to create custom keyboard shortcuts, apply advanced text techniques such as animating scrolling text with custom easing controls, and using advanced animation techniques. Flash CS3 Professional Beyond the Basics covers many challenging features, including adding complex interactivity to a Flash CS3 project and getting Flash content on a phone. Exercise files accompany the tutorials.

Topics include:
  • Customizing Flash CS3 and managing assets Working with ActionScript variables Understanding dynamic text fields Adding interactivity to dynamic text Animating a complex MovieClip Using buttons to navigate labeled frames Working with components Exploring advanced audio and video techniques Creating accessible Flash content Understanding Flash Mobile
Subject:
Web
Software:
Flash Professional
Author:
Todd Perkins

Using functions

Functions are another important building block of ActionScript 3.0. Let's talk about how to create a function and how to run a function. If you're following along, I'm working in 02_Functions.fla in the Chapter 02 folder in the Exercise Files folder. Again, just like the file in the last movie, this file is just a blank document with layer 1 renamed to actions. So let's select the first keyframe of the Actions layer and press Option+F9 on the Mac, or F9 on the PC, to open the Actions panel. Let's create a function called add numbers. To create a function, type the function keyword, all lowercase.

Then type the name of the function. Remember function names, just like variable names should always begin with a lowercase letter. So let's type the name of the function now, and that's add numbers. So type add and then Numbers with a capital N. Notice that the N is capitalized and not to a in add. Just like when you're creating a variable, when you create a function always start with a lowercase letter. A common naming convention is after the first word to give each subsequent word a capital letter that's why add is all lowercase, and the N is capitalized in the word numbers.

That way it's a little bit easier to read the name of a function. Type () and the parentheses can receive values called parameters. I'm putting my cursor inside of the parentheses now and I'm going to create two parameters. I'll call the first one num1 and the data type for that, set with a colon, will be number with a capital N. Type a comma, space and we'll create another parameter for this function called num2, set the data type to Number using a colon. After the close parenthesis, type a colon to declare the data type that this function will return.

What this function will do is take two numbers that you pass in, add them together, and return the value. So the return data type will also be Number with a capital N. On the next two lines type an open { and a close } and then put a line of space in between the open { and close }. The code inside of the { } is the code that will run when this function runs. This is also known as the body of the function. And here I'm simply going to return the sum of num1 and num2, the values passed in the parameters when this function is run.

So type return, all lowercase and then a space, and then type num1, space, plus, space, num2, and then a semicolon to end this statement. So when this function runs, it'll be easy to receive two values, two numbers, and then it'll simply send out the sum of those two numbers as a number data type. A few lines below the close } of this function, run the add numbers function. So to run the function, type the name of the function, addNumbers with a capital N, then we'll pass in two numbers. I'm going to pass in 5 and 15.

Notice the values passed in are separated by a comma. After we run the add numbers function I'm going to type a semicolon. So now what will happen is the add numbers function will run with 5 passed in as num1, and 15 passed in as num2. Flash will then return the sum of num1 and num2 as a number. So in my code, lines one through four define the add numbers function and line six runs the add numbers function, which executes the block of code defined inside of the curly braces when we defined the add numbers function.

And again if this is new to you, you may want to watch the ActionScript 3.0 in Flash CS2 Professional Essential Training title. In that title you can learn a lot more details about what functions are and how to create and use them. So there's a look at how to work with functions.

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