Codejock Developer Community : Smooth vertical scrolling http://forum.codejock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Thu, 14 May 2026 06:48:15 +0000 Thu, 30 Jun 2016 17:35:47 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 forum.codejock.com/RSS_post_feed.asp?TID=13423 <![CDATA[Codejock Developer Community]]> http://forum.codejock.com/forum_images/codejock-logo.gif http://forum.codejock.com/ <![CDATA[Smooth vertical scrolling : improvement of virtual mode performance...]]> http://forum.codejock.com/forum_posts.asp?TID=13423&PID=74850&title=smooth-vertical-scrolling#74850 Author: olebed
Subject: 13423
Posted: 30 June 2016 at 5:35pm

improvement of virtual mode performance]]> Thu, 30 Jun 2016 17:35:47 +0000 http://forum.codejock.com/forum_posts.asp?TID=13423&PID=74850&title=smooth-vertical-scrolling#74850 <![CDATA[Smooth vertical scrolling : &#034;Free Height Mode&#034; means...]]> http://forum.codejock.com/forum_posts.asp?TID=13423&PID=74072&title=smooth-vertical-scrolling#74072 Author: olebed
Subject: 13423
Posted: 29 October 2015 at 4:08pm

"Free Height Mode"  means that you can set height of rows to any value. And of course this will prevent to recalculation height of rows in redrawing.

Scrolling
 -> redraws Report
   -> recalcs height of rows
      ->calls GetRowHeightEx() 

CXTPReportPaintManager::GetRowHeightEx()  just  return  pRow->m_nFreeHeight  in free height mode. In other case method recalc height.

Yes, you need to properly calculate height of every record, but once. To do this you can use algorithm from CXTPReportControl::GetRowsHeight() method.
nRowsHeight += GetPaintManager()->GetRowHeight(&dc, pRows->GetAt(i), nTotalWidth);
change with
CXTPReportRow* pRow = pRows->GetAt(i);
		if (pRow && pRow->GetRecord())
			pRow->GetRecord()->m_nFreeHeight = GetPaintManager()->GetRowHeight(&dc, pRow, nTotalWidth);
to save properly height
  
]]> Thu, 29 Oct 2015 16:08:40 +0000 http://forum.codejock.com/forum_posts.asp?TID=13423&PID=74072&title=smooth-vertical-scrolling#74072 <![CDATA[Smooth vertical scrolling : Hello olebed,Thank you for looking...]]> http://forum.codejock.com/forum_posts.asp?TID=13423&PID=74071&title=smooth-vertical-scrolling#74071 Author: Algae
Subject: 13423
Posted: 29 October 2015 at 1:10pm

Hello olebed,

Thank you for looking at this.  I know you folks must be very busy working on new release.

Ordinarily I do not use  wndReport.m_bFreeHeightMode = TRUE. I use the default of FALSE.

I tested it briefly. It produced report control line items that did not adjust line height to the cell content properly. Word wrap failed to work. It proved unsuitable.

I'm not clear on what free height mode actually means though. CJ help says "Flag to set RC Free Height Mode" Wink

If the rows are fixed height, I can see how scroll performance would be improved since the bottleneck seems to be in refactoring row heights.

]]> Thu, 29 Oct 2015 13:10:07 +0000 http://forum.codejock.com/forum_posts.asp?TID=13423&PID=74071&title=smooth-vertical-scrolling#74071 <![CDATA[Smooth vertical scrolling : Hi Algae,Do you use wndReport.m_bFreeHeightMode...]]> http://forum.codejock.com/forum_posts.asp?TID=13423&PID=74069&title=smooth-vertical-scrolling#74069 Author: olebed
Subject: 13423
Posted: 29 October 2015 at 5:59am

Hi Algae,

Do you use   wndReport.m_bFreeHeightMode = TRUE ?

(Sorry, I'm not having enough time to explore performance of Report Control now. But I remember about it  and sometimes I can notice some things.)
]]> Thu, 29 Oct 2015 05:59:46 +0000 http://forum.codejock.com/forum_posts.asp?TID=13423&PID=74069&title=smooth-vertical-scrolling#74069 <![CDATA[Smooth vertical scrolling : Sorry, no. I have not tried FixedRowHeight.The...]]> http://forum.codejock.com/forum_posts.asp?TID=13423&PID=73673&title=smooth-vertical-scrolling#73673 Author: Algae
Subject: 13423
Posted: 21 July 2015 at 3:59pm

Sorry, no. I have not tried FixedRowHeight.

The row heights have to be variable for my purpose since record item content may vary widely from one record to another. For instance a "Note" item might consist of 1 line of text or > 20.
]]> Tue, 21 Jul 2015 15:59:19 +0000 http://forum.codejock.com/forum_posts.asp?TID=13423&PID=73673&title=smooth-vertical-scrolling#73673 <![CDATA[Smooth vertical scrolling : Algae, have you tried wndRepor...]]> http://forum.codejock.com/forum_posts.asp?TID=13423&PID=73672&title=smooth-vertical-scrolling#73672 Author: olebed
Subject: 13423
Posted: 21 July 2015 at 3:46pm

Algae, have you tried wndReport.GetPaintManager()->SetFixedRowHeight(TRUE) ? ]]> Tue, 21 Jul 2015 15:46:50 +0000 http://forum.codejock.com/forum_posts.asp?TID=13423&PID=73672&title=smooth-vertical-scrolling#73672 <![CDATA[Smooth vertical scrolling : Hi Oleksandr,Using:Version 16.26...]]> http://forum.codejock.com/forum_posts.asp?TID=13423&PID=73671&title=smooth-vertical-scrolling#73671 Author: Algae
Subject: 13423
Posted: 21 July 2015 at 3:36pm

Hi Oleksandr,

Using:

Version 16.26 with the exception of XTPTreebase.cpp from 15.3.1 since there were too many problems with later revisions.

I've also tried versions 16.3.1 and 16.4.

Static build. C++.  Visual Studio 2010.

Honestly, I can see why it's slow. The source appears to do lots and lots of required rect computations. The more records there are the slower it gets. I did not try virtual mode since it doesn't support the "grouping" feature which I require.
]]> Tue, 21 Jul 2015 15:36:59 +0000 http://forum.codejock.com/forum_posts.asp?TID=13423&PID=73671&title=smooth-vertical-scrolling#73671 <![CDATA[Smooth vertical scrolling : Hello Algae,What version of ToolkitPro...]]> http://forum.codejock.com/forum_posts.asp?TID=13423&PID=73670&title=smooth-vertical-scrolling#73670 Author: olebed
Subject: 13423
Posted: 21 July 2015 at 3:06pm

Hello Algae,

What version of ToolkitPro do you use?  Also write ActiveX or C++ version ?

Regards,
 Oleksandr Lebed
]]> Tue, 21 Jul 2015 15:06:13 +0000 http://forum.codejock.com/forum_posts.asp?TID=13423&PID=73670&title=smooth-vertical-scrolling#73670 <![CDATA[Smooth vertical scrolling : Any hope of improving the performance...]]> http://forum.codejock.com/forum_posts.asp?TID=13423&PID=73337&title=smooth-vertical-scrolling#73337 Author: Algae
Subject: 13423
Posted: 27 April 2015 at 8:10pm

Any hope of improving the performance of Report Control "Vertical Smooth Scrolling"?

I set:

wndReport.SetScrollMode(xtpReportOrientationAll,xtpReportScrollModeSmooth);

My program became unstable/unusable (time out crash on populate) with a large dataset. I believe the problem has existed for a decade or so. Shocked

It would be nice to have a smooth vertical scroll since a column that exceeds the view area becomes inaccessible to the end user. This can be a pretty dramatic failure when the program runs in a dialog frame window or on a tiny tablet type computer.

Thanks for listening. I hope that the feature can be made usable.
]]> Mon, 27 Apr 2015 20:10:36 +0000 http://forum.codejock.com/forum_posts.asp?TID=13423&PID=73337&title=smooth-vertical-scrolling#73337 <![CDATA[Smooth vertical scrolling : I asked about this feature...]]> http://forum.codejock.com/forum_posts.asp?TID=13423&PID=45997&title=smooth-vertical-scrolling#45997 Author: zitz
Subject: 13423
Posted: 28 February 2009 at 2:44am

I asked about this feature too... :(
Quote Main reason why it won't be changed is perfomance.


]]> Sat, 28 Feb 2009 02:44:25 +0000 http://forum.codejock.com/forum_posts.asp?TID=13423&PID=45997&title=smooth-vertical-scrolling#45997