Hot to get the current scroll position?

[Darko Romanov]

Hi all,

I have to make a sort of "lightbox popup" to show big images in a mobile app that uses iScroll. I thought to do something like:

- I append the big image to the dom with absolute position

- I read the current scroll position

- I set the css top "property" of the big image to make it centered in the page

I've seen that the scroller element is moved with the -webkit-transform proprerty (at least in Chrome), is there an API to get the value of the current scrolling position? Have I to read the css property?

Thanks

[Kevin Siml]

I had a similar problem and have solved it

in iscroll.js search

scrollTo: function (x, y, time, relative) {

var that = this,

step = x,

i, l;

that.stop();

if (!step.length) step = [{ x: x, y: y, time: time, relative: relative }];

for (i=0, l=step.length; i<l; i++) {

if (step[i].relative) { step[i].x = that.x - step[i].x; step[i].y = that.y - step[i].y; }

that.steps.push({ x: step[i].x, y: step[i].y, time: step[i].time || 0 });

}

that._startAni();

},

after that write

 getScrollY: function () {

 var that = this;

 return that.y;

 },  

 

 getScrollX: function () {

 var that = this;

 return that.x;

 },  

the position in your project you can read so:

myScroll.getScrollY()

myScroll.getScrollX()

Greets Kevin

sorry for the bad english

http://www.preis-finder.info

[Luis Montemayor]

Thanks Kevin!

And in order to know in which "page" I am, what I am doing is to divide getScrollX to the size of the "snaped" element.

[Keir Moff]

Is it worth creating a pull request for this addition, or is it/will it be part of IScroll 5 core already?

[Keir Moff]

Realised you can just poll for the coordinates with myScroll.x or myScroll.y - bind it to on scrollStart/scrollEnd or anything really.

[Matteo Spinelli]

myScroll.x and myScroll.y always store the current position. if you need to read those values when the scroller is moving refer to the probe demo.

Matt

[Keir Moffatt]

Thanks!

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