Lightning Launcher

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====== About the script ======
  * Purpose : This script will make your container loop through pages on scrolling in both horizontal and vertical direction. 
  * Author : [[https://plus.google.com/+Lukas Morawietz|LM13]]
  * Current Version : 1.5
  * Link : https://plus.google.com/115366157037831519359/posts/6fongJozQHs

**Note: This script is useless since LLX Version 10.6b1, because this is now a native feature (called seamless)**


====== Changelog ======
  * Version 1.5 (5/4/2014): bugfix
  * Version 1.4 (1/4/2014): added configuration and bugfix 
  * Version 1.3 (31/3/2014): initial release in wiki

====== How to use the script ======
  * set the script in the Positionchanged-event of your container
  * enable infinite scroll
  * disable fit desktop to items
  * set up your configuration at the beginning of the script
  * recommended: enable snap to pages

====== Issues and hints ======
  * don't use with any other script using containers' tag! 
  * on one scrolling point it may flicker. Workaround: detach all items on most right/bottom pages from Grid.
  * using dual position and switching layout may break it. I recommend to use it with only one orientation. 
  * use with caution! There are only seldom bugs, but they may fully break your layout.

//please report all bugs in the g+ community//

====== Script code ======
<sxh javascript;>//config
var horizontalScrolling=true;
var verticalScrolling=true;
//endconfig

var d=LL.getEvent().getContainer();
if(d.getId()==-1)d=LL.getCurrentDesktop();
if(d.getPositionScale()!=1)return;
var data=JSON.parse(d.getTag()||"null");
if (data==null)
{
data=new Object();
data.stateX=0;
data.stateY=0;
data.running=false;
}
if(data.running==true)return;
data.running=true;
d.setTag(JSON.stringify(data));
var dwidth=d.getWidth();
var dheight=d.getHeight();
var cwidth=d.getCellWidth();
var cheight=d.getCellHeight();
var posX=d.getPositionX();
var posY=d.getPositionY();
var box=d.getBoundingBox();
var minX=box.getLeft();
var maxX=box.getRight();
var minY=box.getTop();
var maxY=box.getBottom();
var fullwidth=maxX-minX;
var fullheight=maxY-minY;
var items=d.getItems();

var setLeft=function()
{
data.stateX=1;
for(x=0;x<items.getLength();x++)
{
var item=items.getAt(x);
if(item.getPositionX()>=maxX-dwidth)
{
if(item.getProperties().getBoolean("i.onGrid"))
{
var cell=item.getCell();
item.setCell(Math.round(cell.getLeft()-fullwidth/cwidth), Math.round(cell.getTop()), Math.round(cell.getRight() -fullwidth/cwidth), Math.round(cell.getBottom()));
}
else
{
item.setPosition(item.getPositionX()-fullwidth,item.getPositionY());
}
}
}
}

var setRight=function()
{
data.stateX=0;
for(x=0;x<items.getLength();x++)
{
var item=items.getAt(x);
if(item.getPositionX()<minX+dwidth)
{
if(item.getProperties().getBoolean("i.onGrid"))
{
var cell=item.getCell();
item.setCell( Math.round(cell.getLeft()+fullwidth/cwidth), Math.round(cell.getTop()), Math.round(cell.getRight() +fullwidth/cwidth), Math.round(cell.getBottom()));
}
else
{
item.setPosition(item.getPositionX()+fullwidth,item.getPositionY());
}
}
}
}

var setTop=function()
{
data.stateY=1;
for(x=0;x<items.getLength();x++)
{
var item=items.getAt(x);
if(item.getPositionY()>=maxY-dheight)
{
if(item.getProperties().getBoolean("i.onGrid"))
{
var cell=item.getCell();
item.setCell(Math.round(cell.getLeft()), Math.round(cell.getTop()-fullheight/cheight), Math.round(cell.getRight()), Math.round(cell.getBottom()-fullheight/cheight));
}
else
{
item.setPosition(item.getPositionX(),item.getPositionY()-fullheight);
}
}
}
}

var setBottom=function()
{
data.stateY=0;
for(x=0;x<items.getLength();x++)
{
var item=items.getAt(x);
if(item.getPositionY()<minY+dheight)
{
if(item.getProperties().getBoolean("i.onGrid"))
{
var cell=item.getCell();
item.setCell( Math.round(cell.getLeft()), Math.round(cell.getTop()+fullheight/cheight), Math.round(cell.getRight()), Math.round(cell.getBottom()+fullheight/cheight));
}
else
{
item.setPosition(item.getPositionX(),item.getPositionY()+fullheight);
}
}
}
}


if(fullwidth>dwidth && horizontalScrolling)
{
if(data.stateX==1)
{
if(posX<=minX || posX>=minX+dwidth)
{
if(posX<=minX)
d.setPosition(maxX,posY,1,false);
setRight();
}
}
else
{
if(posX<minX)
setLeft();
if(posX>maxX-dwidth)
{
d.setPosition(minX-dwidth,posY,1,false);
setLeft();
}
}
}
else
{
if(posX<minX)
d.setPosition(minX,posY,1,false);
if(posX>maxX-dwidth)
d.setPosition(maxX-dwidth,posY,1,false);
}

posX=d.getPositionX();
if(fullheight>dheight && verticalScrolling)
{
if(data.stateY==1)
{
if(posY<=minY || posY>=minY+dheight)
{
if(posY<=minY)
d.setPosition(posX,maxY,1,false);
setBottom();
}
}
else
{
if(posY<minY)
setTop();
if(posY>maxY-dheight)
{
d.setPosition(posX,minY-dheight,1,false);
setTop();
}
}
}
else
{
if(posY<minY)
d.setPosition(posX,minY,1,false);
if(posY>maxY-dheight)
d.setPosition(posX,maxY-dheight,1,false);
}


var done=function()
{
data.running=false;
d.setTag(JSON.stringify(data));
}
setTimeout(done,0);
</sxh>
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