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HowTo default the 1st entry as selected in a TreeView
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Topic: HowTo default the 1st entry as selected in a TreeView (Read 585 times)
roger T
New Member
Posts: 14
HowTo default the 1st entry as selected in a TreeView
«
on:
June 25, 2024, 08:15:28 am »
Subject says most of it. When I click on an empty area of a treeview I get a SIGSEGV but do not if an item is already selected.
How do I set an entry as selected when the treeview is created
Cheers
Roger
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TRon
Hero Member
Posts: 3141
Re: HowTo default the 1st entry as selected in a TreeView
«
Reply #1 on:
June 25, 2024, 08:23:37 am »
Depending on your use case you could use
selected
or
select
Logged
All software is open source (as long as you can read assembler)
cdbc
Hero Member
Posts: 1497
Re: HowTo default the 1st entry as selected in a TreeView
«
Reply #2 on:
June 25, 2024, 08:46:15 am »
Hi
First the easy one:
Code: Pascal
[Select]
[+]
[-]
TreeView1
.
Items
[
0
]
.
Selected
:
=
true
;
// root node selected
Second: Do you by any chance, have an 'OnClick' event-handler for the treeview? Then you need to test for nil in that handler, explicitly for when user clicks /outside/ of nodes, but generally it's good practice with treeviews.
Regards Benny
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If it ain't broke, don't fix it
PCLinuxOS(rolling release) 64bit -> KDE5 -> FPC 3.2.2 -> Lazarus 2.2.6 up until Jan 2024 from then on it's: KDE5/QT5 -> FPC 3.3.1 -> Lazarus 3.0
roger T
New Member
Posts: 14
Re: HowTo default the 1st entry as selected in a TreeView
«
Reply #3 on:
June 25, 2024, 08:48:06 am »
Brilliant. Thank you kindly
Cheers
Roger
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