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Scrolling the text with buttons

From: Flash CS3 Professional Beyond the Basics

Video: Scrolling the text with buttons

Now we'll take a look scrolling our text field by clicking the button's layer. If you select the top arrow button you'll see in the Property inspector that the button's Instance Name is up_btn. And if you select the bottom button, what you'll see in the Property inspector is that the buttons Instance Name is down_btn. Let's select the first keyframe of actions layer and open the Actions panel by pressing Option+F9 on the Mac or F9 on the PC. Below the easing variable we created in the last movie, let's create a new variable called scrollAmt, with capital A. We'll set the data type to a number and the value to 15.

Scrolling the text with buttons

Now we'll take a look scrolling our text field by clicking the button's layer. If you select the top arrow button you'll see in the Property inspector that the button's Instance Name is up_btn. And if you select the bottom button, what you'll see in the Property inspector is that the buttons Instance Name is down_btn. Let's select the first keyframe of actions layer and open the Actions panel by pressing Option+F9 on the Mac or F9 on the PC. Below the easing variable we created in the last movie, let's create a new variable called scrollAmt, with capital A. We'll set the data type to a number and the value to 15.

This will refer to how many pixels will scroll each time we click a button. Scroll down in your code to find the scrollUp and scrollDown functions. In the scrollUp function run a function called setDirection with capital D. And in parentheses pass in the scroll amount. We'll define the setDirection function later in this exercise. In the scrollDown function, run the setDirection function and pass in negative scroll amount, just scroll amount with a minus sign before. So -scrollAmt.

And now we'll define the setDirection function. Let's do this right below the scrollDown function. Type function setDirection, with a capital D. It'll need to receive one value and we'll call that dir, short for direction, and the data type will be a number. The function will not return a value, so it will be void. And in the curly braces we'll type text_mc.y += dir What we're also going to do inside of this function, is we'll stop animating the text field with the scrollbar once the user clicks a button.

So let's scroll up and find the code that we commented out in the last exercise. That should be in the stop dragging function. Mine is on line 31 through 35. We're going to select all of line 34, the stage.removeEventListener line of code, and I'm going to press Command+X on my keyboard to cut that code. You can press Ctrl+X on the PC to do the same thing. Scroll down in your code. Find the set direction function. At the bottom of the function, paste the code that you cut by pressing Command+V on the mac, or Ctrl+V on the PC. I'm going to delete the // at the beginning of this line to disable the comment and to enable the code.

Now let's test the movie using Command+Return on the Mac or Ctrl+Enter on the PC. Click the down button to scroll down and click the up button to scroll up. Notice if you hold down your mouse on the buttons, the text field doesn't move. We'll add that functionality in the next exercise. So there's a look at controlling the scrolling of a text field using buttons.

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This video is part of

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Flash CS3 Professional Beyond the Basics

79 video lessons · 25601 viewers

Todd Perkins
Author

 
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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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