Dynamic parameters and properties

[gigbig]

Hi guys! My first topic here!

I have an array of pages, and I want to go to the previous/next one using tweens, with different types of transitions, horizontal sliding (x coordinate), vertical sliding (y coordinate), fading (alpha parameter) or rotation (rotationY parameter).

 

I want to convert classic tweens to tweenlite. The original code (for just one of the two pages moving) was

new Tween(pages[whatever], transitionType, Regular.easeOut, BStart, BEnd, transitionSpeed, true);

 

where transitionType can be "x", "y", "alpha" or "rotationY", corresponding to 4 MovieClip native properties.

 

The stupid way would be the following code:

switch (transitionType)
{

case "x" :
pages[whatever].x = BStart;
TweenLite.to(pages[whatever], transitionSpeed, {x : BEnd});
break;

case "y" :
pages[whatever].y = BStart;
TweenLite.to(pages[whatever], transitionSpeed, {y : BEnd});
break;

case "alpha" :
pages[whatever].alpha = BStart;
TweenLite.to(pages[whatever], transitionSpeed, {alpha : BEnd});
break;

case "rotationY" :
pages[whatever].rotationY = BStart;
TweenLite.to(pages[whatever], transitionSpeed, {rotationY : BEnd});
break;

}

 

I need a smarter coding like

 

pages[whatever].###transitionType### = BStart;
TweenLite.to(pages[whatever], transitionSpeed, {###transitionType### : BEnd});

 

in order to add n transitions corresponding to n MovieClip native properties without creating a giant switch, but just keeping 2 lines of code (classic tweens need just 1!).

 

The problem is that I don't know how to use a string as a tween parameter name or a Movieclip property name.

Can you help me, please?

[Carl]

Using the "normal" TweenLite vars object I'm not so sure that is possible.

 

The good news is that TweenLiteVars makes this really easy: http://www.greensock.com/tweenvars/

 

import com.greensock.*; 
import com.greensock.data.TweenLiteVars;

var dynamicProp:String = "x";
var dynamicPropValue:Number = 300;

TweenLite.to(mc, 1, new TweenLiteVars().prop(dynamicProp, dynamicPropValue));

[gigbig]

Great!

And if I wanted to add an onComplete event?

 

I will dig more inside Greensock...

[Carl]

please read the page I linked to previously http://www.greensock.com/tweenvars/

 

onComplete is addressed in the first code sample.

 

thanks and enjoy

 

Carl