Lightning Launcher

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====== About the script ======
  * Purpose : This is a script that place an item (in the video a panel) always on top of the screen. Scroll down the desktop to show it. Scroll up to hide.
  * Author : [[https://plus.google.com/u/1/105066926163073195690|TrianguloY]]
  * Link: https://plus.google.com/u/1/105066926163073195690/posts/DPufvGD2SjF (With video)

====== How to use the script ======

Instructions:
  * Copy paste this script as a new one.
  * IMPORTANT: you need to label "always-bar" the item you want to move
  * Pin that item and detach it from the screen
  * Set the script in the position change event of the desktop

====== Script code ======
<code>
var desk = LL.getCurrentDesktop();


/* Label of the item to move.*/
var bar = desk.getItemByLabel("always-bar");


/* current position
// in case don't exist
//difference
//save
*/
var deskpos = desk.getPositionY();
if(!("prev" in self )) self.prev = deskpos;
var d = deskpos-self.prev;
self.prev = deskpos;


var barpos = bar.getPositionY();
var size=bar.getScaleY() * bar.getHeight();

/*hide the bar */
if(d>0 && barpos>-size){
	if(barpos-d<-size || barpos<-size){
		bar.setPosition(0,-size);
	}else{
		bar.setPosition(0,barpos-d);
	}
}

/*show the bar */
if(d<0 && barpos<0){
	if(barpos-d*2>0 || barpos>0){
		bar.setPosition(0,0);
	}else{
		bar.setPosition(0,barpos-d*2);
	}
}
</code>

Lightning Launcher

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