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constantly scrolling onPress

Posted on 2007-11-27
3
Medium Priority
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219 Views
Last Modified: 2010-04-03
Hello, does anyone know how to create a scroll button that constantly scrolls when pressed as opposed to advancing one increment per click??

I'm only using this at the mo.

this.scroller.down_btn.onPress= function() {
    paraOne.scroll += 1;
};

this.scroller.up_btn.onPress = function() {
    paraOne.scroll -= 1;
};


Cheers, Paul.
0
Comment
Question by:Sideas
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3 Comments
 
LVL 37

Accepted Solution

by:
CyanBlue earned 2000 total points
ID: 20365689
What you define within the onPress handler executes only once...  So, you will need additional loop to execute the constant scrolling...

Try something like this...

CyanBlue
this.scroller.down_btn.onPress = function()
{
	delete this._parent.onEnterFrame;
	this._parent.onEnterFrame = function ()
	{
		paraOne.scroll += 1;
	}
}
this.scroller.up_btn.onPress = function()
{
	delete this._parent.onEnterFrame;
	this._parent.onEnterFrame = function ()
	{
		paraOne.scroll -= 1;
	}
}

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0
 
LVL 2

Author Comment

by:Sideas
ID: 20380530
Cheers CyanBlue that does work, but it jumps the scroll box down way too quick.

Do you know of a way of putting some, I dunno "weight" or "time" into a scroll?

Cheers, P.
0
 
LVL 37

Assisted Solution

by:CyanBlue
CyanBlue earned 2000 total points
ID: 20382508
You could use setInterval() function instead of the onEnterFrame handler...

CyanBlue
var scrollSpeed:Number = 250;
// 1000 is 1 second for scrollSpeed value...
//
this.scroller.down_btn.onPress = function()
{
	_global.scroll_iv = setInterval(scrollParagraph, scrollSpeed, 1);
}
this.scroller.down_btn.onRelease = function()
{
	clearInterval(_global.scroll_iv);
}
//
this.scroller.up_btn.onPress = function()
{
	_global.scroll_iv = setInterval(scrollParagraph, scrollSpeed, -1);
}
this.scroller.up_btn.onRelease = function()
{
	clearInterval(_global.scroll_iv);
}
//
function scrollParagraph(_val:Number)
{
	paraOne.scroll += _val;
}

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0

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