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Author: Patrick Jansen | Website: http://orbita.starmedia.com/~pjv

Adding the Scrollbuttons and Necessary Triggers (cont.)

Step 2 (cont.) :

Now we'll repeat this for the Movie Clip scrollUp but with a little difference in the scrollaction. Frame 1, insert action:


At frame 2 insert the actions

Set Variable: "currentScroll" = ../:scrolltext.scroll
Set Variable: "max" = ../:scrolltext.maxscroll
If (currentScroll > 1)
    Set Variable: "../:scrolltext.scroll" = currentScroll - 1
End If

And in frame 3 the action

Go to and Play (2) 

The difference with scrollDown is in the If-statent of scrollUp. Because the initial scrollvalue of a textfield is always 1, the first line of the textfield, we check that currentScroll (the current scroll value - read 'current visable first line number') is greater then 1. This way the text will scroll up only until it reaches the first line. This is done by the action between the If -statement, where we get the current scrollvalue of scrolltext and counting down 1 line.

Noticed the use of ../ ? If you are a little bit familiar with Action Script you probably get this right away. If you got confused, the ../ indicates one level lower in the hierarchy of flash movieclips and/or loaded movies. currentScroll and max are local variables within the trigger Movie Clips scrollUp and scrollDown. These 2 Movie Clips are placed in the Movie Clip window. scrolltext.scroll and scrolltext.maxscroll are properties of the textfield scrolltext which is directly situated in Movie Clip window. To addres properties from a Movie Clip with actions which reside within a nested Movie Clip, you need to use ../ before the variable.

» Level Advanced

Added: 2000-12-27
Rating: 8 Votes: 189
(10 being the highest)
» Author
Patrick Jansen is a freelance flash-, graphic- and webdesigner. Born in Holland, currently residential in Brazil. Worked for the compagnies Lectric b.v. (www.lectric.nl) and NIC b.v. (www.notenbomer.nl).
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