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Tutorials » Interactivity

Creating a Text that uses Scrollbuttons and a Scrollbar
Author: Patrick Jansen | Website: http://orbita.starmedia.com/~pjv |

Adding the Scrollbuttons and Necessary Triggers (cont.)

Step 2 (cont.) :

At frame 2 insert the actions

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

Let's look at what this does. First the variable currentScroll is set to the current scollvalue of scrolltext. It will return the number of the current topmost textline. Next, the variable max is set to the maximum textline which can show up as line 1 in the textfield scrolltext. For example, if your text is 40 lines and your textfield shows 7 lines, then max will result in a value of 33 (40 - 7) since when line 33 is shown as line 1 in the textfield, it will show the rest of the text till line 40. Next comes an If statement. We just want to scroll untill it reaches the maximum scroll, so we check if the current textline is less then the maximum scrollable textline. If it is less, the continuously executed action in frame 2 of the loop frame 2 - frame 3 will create a scrolling effect by getting the current scroll line and adding up 1 line, and we close the If statement.

To create a loop between frame 2 and 3, add the following action to frame 3

Go to and Play (2)

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