offset of a FlexScrollView element about famous-flex

[Qvatra]

I did figure out that I can do it by asking it in matrices:

    var offset_x = flexScrollView._dataSource[id]._matrix[12];
    var offset_y = flexScrollView._dataSource[id]._matrix[13];

which works but I also need to know the flexScrollView absolute offset.
For some reason flexScrollView.getOffset() doesn't show absolute offset of a view. I don't know what it shows.. seems like it resets after whole page was scrolled and strarts over..

How to get absolute offset?

Also I would like to know is there a way to disable scrolling dynamically?

[IjzerenHein]

Yikes!

If you want to offset a renderable, I suggest you wrap it inside Modifier, and give the Modifier a translation offset:

var RenderNode = require('famous/core/RenderNode');
var Surface = require('famous/core/Surface');
var Modifier = require('famous/core/Modifier');
var Transform = require('famous/core/Transform');

// Create a surface that is offsetted 10px down
var mod = new Modifier({
  transform: Transform.translate(0, 10, 0)
});
var sur = new Surface({..});
var node = new RenderNode(mod);
node.add(sur);

// Add surface to scrollview
scrollView.push(node);

To answer your other question. You can use the getSpec function to get the absolute position of a renderable. This only works though if the renderable is in the DOM.

[IjzerenHein]

Btw, this method:

var offset_x = flexScrollView._dataSource[id]._matrix[12];
var offset_y = flexScrollView._dataSource[id]._matrix[13];

Don't use it. You are accessing private members of the FlexScrollView and Surface. These will possibly change in a future update causing your code to break.

[Qvatra]

Goedendag,
here is example of what I want to build: https://dl.dropboxusercontent.com/u/49691996/FamousDemo/kit/examples/views/flexScrollCenter/example.html

onclick event should move red surface to the upper left corner independently of the position of the scroll.
I'm use here private members:
var offset_x = flexScrollView._dataSource[3]._matrix[12];
var offset_y = flexScrollView._dataSource[3]._matrix[13];
var absoluteScrollPosition = flexScrollView._scroll.groupStart + flexScrollView.getOffset();

I really don't know how to get these values in a right way.... Can you help me?

1. I can't use getSpec because my red surface doesn't have it.
2. In documentation is said that flexScrollView.getOffset() is the scroll position of the flexscrollview but I've found out that its not absolute - if you have a lot of elements offset resets continuously while scrolling (after each reset scroll.groupStart collects that value so I've found a way to get absolute position)
3. Is it possible to disable scrolling after onclick event?

[Qvatra]

1. OK I was stupid to search getSpec in surface. it's a function of a flexScrollView.
2. also solves this problem because getSpec() returns absolute values.
3. also found options.enabled: bool