Codejock Forums Homepage
Forum Home Forum Home > Codejock Products > ActiveX COM > Report Control
  New Posts New Posts RSS Feed - Vertical Smooth Scrolling Performance (again)
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Vertical Smooth Scrolling Performance (again)

 Post Reply Post Reply
Author
Message
fjosesen View Drop Down
Groupie
Groupie
Avatar

Joined: 30 June 2008
Status: Offline
Points: 49
Post Options Post Options   Thanks (0) Thanks(0)   Quote fjosesen Quote  Post ReplyReply Direct Link To This Post Topic: Vertical Smooth Scrolling Performance (again)
    Posted: 15 November 2017 at 4:38pm
Hi,

I discussed about this issue 6 years ago, but it still happens with the last release :-(

I need to use the report control (ActiveX) with variable height preview area (each row will have different height than others) with a lot of records (10,000 to 50,000) and with smooth vertical scrolling :-)

I'm testing with a sample application (written from scratch) but I cannot get a good performance in any way (even with lightning fast event handlers when measuring or drawing preview area). I'm testing using virtual and non virtual ways but the control always spend a lot of time when scrolling to the last elements. It works fine with the first ones. It seems than the logic developed to calculate the record for the scroll position has an exponential complexity. I know that you need to calculate the height of every previous rows in order to determine the row at the current scroll offset but you'd have to implement any kind of mechanism to enhance it (caching, using estimated and real row heights, delegate on user to calculate it, etc.)

I know it could be a hard work to solve it, but, please, think about many people are waiting for any solution for years (like me).

Thanks in advance
Products: Suite Pro (ActiveX) v18.0.1
          Toolkit Pro (MFC) v18.0.1
Platform: Windows 10 (64bit)
Language: VC++ 2013 (MFC)
Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.04
Copyright ©2001-2021 Web Wiz Ltd.

This page was generated in 0.141 seconds.