Gantt smart rendering problem

Gantt
#1

Hello!

I have a strange issue when smart rendering is on. Here is what happens:

  • load a large dataset, so that it doesn’t fit on the screen (vertical scroller appears)
  • scroll down to the bottom so that new rows appear
  • try to load only a task, that was primarily not rendered, using client filter, AJAX, … so that the page does not reload
  • the task WON’T show even if data is properly passed to parse()
  • if I disable smart rendering, all’s good

Using dhtmlxGantt v.4.0.0 Professional

I’ve tried to reproduce the problem on a fiddle, but without success. Is this bug version related? It seems that newer plugins are totally rewritten.

Thank!

#2

It seems like the problem comes from:

getRange: function(buffer){}

I detected calculations where

gantt._order.slice(firstTask, lastTask);

was trying to find records that doesn’t existst!
Smart_rendering doesn’t take into account, that data (tasks) might change between the last and next rendering…
Does it make sense? Can you provide a patch?
Thank you.

#3

Hi,

So far we can’t reconstruct the issue locally, still there really can be an issue with dataset size changes while in the smart rendering mode.
We will double-check our codebase.

If you can share any sample, where the issue can be reconstructed, it will help a lot ( you can send a demo link directly to the support@dhtmlx.com )

#4

Hi Stanislav

Thank you for your effort.

I’ve just send a mail to support@dhtmlx.com with a test case.

#5

Unfortunately, I’ve found no way to fix this, with or without support. Turned smart rendering OFF, version 4.0 is of no use to me. What a disappointment. :angry: