(UTC)
  The MindFusion Forums › Flow Diagramming Components › WPF › Issues with virtualization.
(Moderator: Slavcho)
‹ No Topic | Next Topic ›
Page Index Toggle Pages: 1 Send TopicPrint
Normal Topic Issues with virtualization. (Read 71 times)
nullable
Junior Member
**
Offline


I Love MindFusion!

Posts: 92
Joined: Aug 25th, 2022
Issues with virtualization.
Oct 14th, 2024 at 12:05pm
Print Post  
Hello, Mindfusion team! I eventually try to update the project to the last version from 3 major version, and I am having some troubles with virtualization performance. Thing is, we utilize many items withing our application. I noticed that after updating the app to the latest version when using vertical/horizontal scroll there is some lagging related with virtualization logic. Could you please improve performance for my scenario, or, maybe, let me disable this virtualization. Now I cannot find an appropriate property/method to disable it. Please refer to the attached videos and projects.
  
Back to top
 
IP Logged
 
nullable
Junior Member
**
Offline


I Love MindFusion!

Posts: 92
Joined: Aug 25th, 2022
Re: Issues with virtualization.
Reply #1 - Oct 14th, 2024 at 12:10pm
Print Post  
Project/video before the update https://drive.google.com/drive/folders/1erK7gcm7_GkWQMFeS9-4wE0XWfMuIdLg?usp=dri
ve_link
  
Back to top
 
IP Logged
 
nullable
Junior Member
**
Offline


I Love MindFusion!

Posts: 92
Joined: Aug 25th, 2022
Re: Issues with virtualization.
Reply #2 - Oct 14th, 2024 at 12:11pm
Print Post  
Project/video after the update https://drive.google.com/drive/folders/10NPCZ3B__wRJc91kApJuVBORq-oEwYFT?usp=dri
ve_link
  
Back to top
 
IP Logged
 
Slavcho
YaBB Moderator
*****
Offline


tech.support

Posts: 3244
Joined: Oct 19th, 2005
Re: Issues with virtualization.
Reply #3 - Oct 15th, 2024 at 7:33am
Print Post  
Hi,

Having many items shouldn't be a problem on its own if you show only a few scores of them in current viewport, and possibly enable spatial indexing. However your test project displays some 600-700 nodes per viewport, and DiagramView creates presenters for them at each scroll, leading to lag indeed.

We'll have in mind a boolean property to disable virtualization for upcoming release. At this time you could probably disable it yourself by keeping the DiagramView as large as diagram.Bounds and using an external ScrollViewer; the view should create all item presenters just once then when displayed for the first time, similar to old version.

Regards,
Slavcho
Mindfusion
  
Back to top
 
IP Logged
 
Slavcho
YaBB Moderator
*****
Offline


tech.support

Posts: 3244
Joined: Oct 19th, 2005
Re: Issues with virtualization.
Reply #4 - yesterday at 2:00pm
Print Post  
This build lets you disable virtualization, creating all presenters along with their items -

https://www.nuget.org/packages/MindFusion.Diagramming.Wpf/4.1.4-rc

Code
Select All
DiagramView.EnableVirtualization = false;


We'll experiment with background loading of presenters for adjacent viewports / pages when we have time for a bigger release, hopefully should help keep virtualization enabled for crowded viewports like yours.

Regards,
Slavcho
Mindfusion
  
Back to top
 
IP Logged
 
Page Index Toggle Pages: 1
Send TopicPrint
‹ No Topic | Next Topic ›
 
  « Board Index ‹ Board Top  

The MindFusion Forums » Powered by YaBB 2.6.11!
YaBB Forum Software © 2000-2024. All Rights Reserved.

Valid RSS Valid XHTML Valid CSS Powered by Perl Source Forge