Identification of Scroll bar

Shwetha

Hi,
I have a requirement for identifying scroll bars in a web page. Can anyone please help me in identifying scroll bars through Sahi. The scroll bars are not identified when spyed. Is there any function or other method to do this?

narayan

Shwetha,

Can you tell why you want to identify the scrollbar? What is the end goal?
Javascript does not allow you to directly access the scrollbar, though you can scroll to a particular point on the page.

Regards,
Narayan

Shwetha

actually I just need to check if the scroll bar is present when more number of events are present. I dont need to use the scroll bar or scroll page. I just want to identify if scroll bar is present.

beesman

var $nHeight = _eval("document.body.scrollHeight");
var $nTop = _eval("document.body.scrollTop");
var $nCHeight = _eval("document.body.clientHeight");
_alert($nHeight + " " + $nTop + " " + $nCHeight);
if (_condition($nHeight > ($nTop + $nCHeight))) {
//bar present
}else{
//bar not present
}

narayan

Hi Beesman,

Thanks for the answer. I have a question though. Why is the scrollTop being added to the scrollHeight?
Would it not suffice to just check if scrollHeight is greater than clientHeight?
We will also need to check that the overflow property of style is not "hidden".

Some info: http://www.quirksmode.org/dom/w3c_cssom.html

I am adding the overflow property check to your solution, removing scrollTop and moving it into a browser function. Let me know if this works for you.

<browser>
function hasScrollBar(el){
   return (el.scrollHeight > el.clientHeight && _style(el, "overflow") != "hidden");
}
</browser>

_assert(hasScrollBar(document.body));

// or for a div
_assert(hasScrollBar(_div("myDiv")));

// or use an element's ownerDocument to get to its parent document object
// _link("myLink").ownerDocument.body) may be used to find the frame's body in which _link("myLink") is.
_assert(hasScrollBar(_link("myLink").ownerDocument.body));

Regards,
Narayan

beesman

>>Why is the scrollTop being added to the scrollHeight?

it's not necessary to add the scrollTop .
if u want to know whether the scrollbar scrolled to the bottom. scrollTop is necessary .

narayan

Got it. Thanks.

rajivpamidi

Hi Narayan,

In one of the above comments you mentioned
"Javascript does not allow you to directly access the scrollbar, though you can scroll to a particular point on the page."

I want to scroll down but sahi fails to identify that, could you please give a solution to that.

globalworming

@rajivpamidi

you could use _focus($element). The viewport will be moved so that this $element is visible.

Regards
Wormi

rajivpamidi

Hi Wormi,
Thanks for the reply... but the scroll bar is an infinite scroll bar, I was able to assert if the scroll bar is present or not using Narayan's code in the above comments but could not focus on that scroll bar since it does not have a unique div id .

b_nagapadmini

Hi,
Even i have similar issue,like objects get loaded only when we scroll like in FB .so if i want to find the object and click what i can do for it?