VirtualStringTree (VST) - big problems

[Stano 143]

I have on form 10 VST as trees with two levels. I'm getting very strange behavior that I haven't encountered before. VST:

• have set basic properties - for sure
• they appear collapsed

I expand a node (of course on level 0). I won't expand another node. I have two options:

• I put Sender.Invalidate in OnExpanded, or
• click on another VST and go back

I select the node at level 1. If I want to select another one, I have to click 2x on the tree, the node
There are considerably more of these problems. Trees are simply not updating, not redrawing or something else
Plus my custom navigator, based on TAdvPanel, doesn't call the OnEnter event.
With that state, the form can't be worked with at all. It's driving me crazy already.
Is there a soothsayer who can direct me?

[Stano 143]

Make-up. It probably plays a role.
If I add or remove any unit in the dpr, it throws me a DataModule reference after the end of the dpr. Something is wrong with it and I can't seem to get rid of it.

[Stano 143]

Attached are separate units
Form and DataModule

• UPokusActionBar.pas
• dmBasic.pas

Auxiliary files

• DeclarationTypes.pas
• FDFunction.pas
• SQLTexts.pas
• VSTreeFunctions.pas

Basic files that form the skeleton in my programs

• CustomObject.pas
• CustomVst.pas
• VstAsTree.pas

"Superstructure" files. There is a problem somewhere

• CoachToTeam.pas
• RelationTree.pas

Everything can be downloaded here. Working example..
www.uschovna.cz/zasilka/MJ3XRK2MDRGJDWWJ-53U
Shipment code MJ3XRK2MDRGJDWWJ-53U

Pokusy Units.zip

[mytbo 5]

With this data structure for the VST, it would be easier to use a class as a record for the tree data. The VST should better not hold the data, but only display it. This article shows how easy it is to map a data structure in VST. Here is the translation into English with Google Translator. The result is not perfect (rather not so good), also some formatting is destroyed, but it is readable.

 

With best regards

Thomas

 

[Stano 143]

Thank you for your contribution. I will take a look at the article. For me there is no point in changing it. The problem is elsewhere.
I still add that it will never call OnChange !!! When using the RealitonTree class all VSTs as trees are broken.

 

For me it is very complicated. And unnecessary. I have to keep the data somewhere. So let them be in VST.

Edited September 2, 2023 by Stano

[Stano 143]

Repaired units. Cleaned uses.

Pokusy.zip

[Stano 143]

Hooray, I found it. I lost FVst.EndUpdate in CustomVst.FinallyFill;