TD 6.3.9 - Strange behavior with WheelMouseScroll cDesktopListBox

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pascmeul
Belgium
Posts: 21
Joined: 09 Oct 2017, 08:50
Location: Oostkamp, Belgium

TD 6.3.9 - Strange behavior with WheelMouseScroll cDesktopListBox

Post by pascmeul » 22 Nov 2021, 15:44

Hi,

we have a strange behavior when scrolling with wheelmouse (to bottom) on cDesktopListBox.
After releasing the wheel, the listbox is scrolling back to the selected listitem.
- cDesktopListBox (vtcomdlg.apl)
- Windows 10 20H2
- TD6.3.9 (virtual environment ThinApp 5.2.9)
See attachment.

We can not simulate this on our systems.
We have no SAM-/VT-message defined to set focus or on scrolling.

This issue is not occuring when scrolling with the navigation bar.
Any ideas?

Pascal
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Dave Rabelink
Founder/Site Admin
Founder/Site Admin
Netherlands
Posts: 3384
Joined: 24 Feb 2017, 09:12
Location: Gouda, The Netherlands

Re: TD 6.3.9 - Strange behavior with WheelMouseScroll cDesktopListBox

Post by Dave Rabelink » 22 Nov 2021, 20:49

I'm not sure it is related but all the Visual Toolchest (VT) listboxes have terrible visual scrolling (when using the wheel).

It is described here and a fix is available:

https://wiki.tdcommunity.net/index.php? ... ual_effect

(you can implement the same fix from the sample on the cDesktopListBox object)

Try this out and see if this solves your problem.
Regards,
Dave Rabelink

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pascmeul
Belgium
Posts: 21
Joined: 09 Oct 2017, 08:50
Location: Oostkamp, Belgium

Re: TD 6.3.9 - Strange behavior with WheelMouseScroll cDesktopListBox

Post by pascmeul » 23 Nov 2021, 07:46

Dave,

we will try this and keep you posted

thx

Pascal

pascmeul
Belgium
Posts: 21
Joined: 09 Oct 2017, 08:50
Location: Oostkamp, Belgium

Re: TD 6.3.9 - Strange behavior with WheelMouseScroll cDesktopListBox

Post by pascmeul » 20 Dec 2021, 12:16

Dave,

we tested this on serveral computers.
This issues is fixed. Thx!

Although, when expand 1 item, the listbox remains scrolling to the top and back to the selected listitem.
Can we fix this?

Pascal

Dave Rabelink
Founder/Site Admin
Founder/Site Admin
Netherlands
Posts: 3384
Joined: 24 Feb 2017, 09:12
Location: Gouda, The Netherlands

Re: TD 6.3.9 - Strange behavior with WheelMouseScroll cDesktopListBox

Post by Dave Rabelink » 21 Dec 2021, 14:13

pascmeul wrote:
20 Dec 2021, 12:16
Although, when expand 1 item, the listbox remains scrolling to the top and back to the selected listitem.
Can we fix this?
Do you have a small testcase to show this?
Regards,
Dave Rabelink

Image
Articles and information on Team Developer Tips & Tricks Wiki
Download samples, documents and resources from TD Sample Vault
Videos on TDWiki YouTube Channel

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