jQuery Grid Plugin - jqGrid - Topic: True scrolling Rows loads data too often http://www.trirand.com/blog/?page_id=393/bugs/true-scrolling-rows-loads-data-too-often Simple:Press Version 5.7.5.3 Klaus on True scrolling Rows loads data too often http://www.trirand.com/blog/?page_id=393/bugs/true-scrolling-rows-loads-data-too-often#p16536 Bugs http://www.trirand.com/blog/?page_id=393/bugs/true-scrolling-rows-loads-data-too-often#p16536 Hello,

look at this post: http://www.trirand.com/blog/?p.....-problems/

... using a very little scrollTimeout should solve the problem.

Kind regards,
Klaus.

]]> Mon, 19 Apr 2010 15:16:06 +0300 tony on True scrolling Rows loads data too often http://www.trirand.com/blog/?page_id=393/bugs/true-scrolling-rows-loads-data-too-often#p16452 Bugs http://www.trirand.com/blog/?page_id=393/bugs/true-scrolling-rows-loads-data-too-often#p16452 Hello,

Could you please provide a link to the problem. If you do this please include the nonminified (i.e development) version from GitHub.

Thank you.

Best Regards

Tony

]]> Fri, 16 Apr 2010 16:24:27 +0300 frodeo on True scrolling Rows loads data too often http://www.trirand.com/blog/?page_id=393/bugs/true-scrolling-rows-loads-data-too-often#p16425 Bugs http://www.trirand.com/blog/?page_id=393/bugs/true-scrolling-rows-loads-data-too-often#p16425 I still have the same problem after applying the patch.

Regards
Frode Oldervoll

]]> Thu, 15 Apr 2010 10:31:45 +0300 tony on True scrolling Rows loads data too often http://www.trirand.com/blog/?page_id=393/bugs/true-scrolling-rows-loads-data-too-often#p16343 Bugs http://www.trirand.com/blog/?page_id=393/bugs/true-scrolling-rows-loads-data-too-often#p16343 Hello Frode,

Thanks for this. I just fix some things when we are with scroll:1. The fix is in GitHub.

If you want you can test it. Hope that at end the problem is fixed. You can test it.

Best Regards

Tony

]]> Sat, 10 Apr 2010 14:59:17 +0300 frodeo on True scrolling Rows loads data too often http://www.trirand.com/blog/?page_id=393/bugs/true-scrolling-rows-loads-data-too-often#p16335 Bugs http://www.trirand.com/blog/?page_id=393/bugs/true-scrolling-rows-loads-data-too-often#p16335 I still have problems with scroll:1  – the first 9 times I click the down-arrow in the scrollbar the grid loads data from the server. I use the exact same script as in the "True scrolling Grid" example, and the data returned from the server is almost equal to the data returned from bigset.php.

I see the following when I debug the code (from grid.base.js):

populateVisible: function() {

256 if (grid.timer) clearTimeout(grid.timer);
257 grid.timer = null;
258
259 var dh = $(grid.bDiv).height();
260 if (!dh) return;
261 var table = $("table:first", grid.bDiv);
262 var rows = $("> tbody > tr:visible:first", table);
263 var rh = rows.outerHeight() || grid.prevRowHeight;
264 if (!rh) return;
265 grid.prevRowHeight = rh;
266 var rn = p.rowNum;
267 var scrollTop = grid.scrollTop = grid.bDiv.scrollTop;
268 var ttop = Math.round(table.position().top) – scrollTop;
269 var tbot = ttop + table.height();
270 var div = rh * rn;
271 var page, npage, empty;
272 if (ttop <= 0 && tbot < dh &&
273 (p.lastpage==null||parseInt((tbot + scrollTop + div – 1) / div,10) < p.lastpage))
275 npage = parseInt((dh – tbot + div – 1) / div,10);
276 if (tbot >= 0 || npage < 2 || p.scroll === true) {
277 page = Math.round((tbot + scrollTop) / div) + 1;
278 ttop = -1;
279 } else {
280 ttop = 1;
281 }
282 }
283 if (ttop > 0) {
284 page = parseInt(scrollTop / div,10) + 1;
285 npage = parseInt((scrollTop + dh) / div,10) + 2 – page;
286 empty = true;
289 if (npage) {
The first 9 times scrollTop has the following values: 14, 28, 42, 56, 70, 84, 98, 112, 126.
while table.position().top() is 129, tbot is approx 1700 and dh is 255. This results in a positive value for ttop (line 268).
The 10th time scrollTop is 140, which results in ttop = -10. Then the if-test in line 283 is false, npage is undefined and the if-test in line 289 is false. Which again results in the server call not beeing performed.
I don't know the exact logic behind this, but it explains why I get a server call the first 9 times the scrollbar is clicked. What is wrong here?
Regards
Frode Oldervoll
]]> Fri, 09 Apr 2010 20:30:56 +0300 wolis on True scrolling Rows loads data too often http://www.trirand.com/blog/?page_id=393/bugs/true-scrolling-rows-loads-data-too-often#p15032 Bugs http://www.trirand.com/blog/?page_id=393/bugs/true-scrolling-rows-loads-data-too-often#p15032 Hi Frode,

I have not seen this behaviour when experimenting with scroll: 1.

I use a default definition like this:

  jQuery.extend(
   jQuery.jgrid.defaults, {
    altRows:true,
    rowNum:40,
    rowList:[],
    sortorder: 'asc',
    datatype: 'json',
    viewrecords: true,
    autowidth: true,
    hoverrows: true,
    shrinkToFit: false,
    gridview: false,
    loadui: 'enable',
    multiselect: false,
    sortable: true,
    scroll: 1
   }
  );

The jqGrid is resizable but generally only 10 rows show. Each time I scroll down so that the first blank row is visible, it does one request for more data.

]]> Mon, 22 Feb 2010 02:54:59 +0200 frodeo on True scrolling Rows loads data too often http://www.trirand.com/blog/?page_id=393/bugs/true-scrolling-rows-loads-data-too-often#p15022 Bugs http://www.trirand.com/blog/?page_id=393/bugs/true-scrolling-rows-loads-data-too-often#p15022 I have a grid based on the True scrolling Rows demo, ie "Scroll:1". I set the buffer to for instance 50 (rowNum:50) and have 20 visible rows (height:xxx). The problem is that the first 10 times I click the down-button on the scrollbar the grid asks the server for an update (and I get the "Loading ..." message). After the 10 initial loads the buffer is used correctly.

Anybody else seeing this bug? Is there a plan for it to be fixed?

Frode Oldervoll

]]> Sun, 21 Feb 2010 01:53:43 +0200