Lazarus
Home
Help
TinyPortal
Search
Login
Register
Lazarus
»
Forum
»
Programming
»
LCL
»
[CLOSED] Scrollbox detect vertical scroll
Free Pascal
Website
Downloads
Wiki
Documentation
Bugtracker
Mailing List
Lazarus
Website
Downloads (Laz+FPC)
Packages (OPM)
FAQ
Wiki
Documentation (RTL/FCL/LCL)
Bugtracker
CCR Bugs
IRC channel
GIT
Mailing List
Other languages
Foundation
Website
Useful Wiki Links
Project Roadmap
Getting the Source
Screenshots
How to use the forum
About donations (wiki)
Bookstore
Computer Math and Games in Pascal
(preview)
Lazarus Handbook
Search
Advanced search
Recent
TIndexedAVLTree in Trunk
by
lainz
[
Today
at 10:49:03 pm]
Parameter passing odditie...
by
Nitorami
[
Today
at 10:48:22 pm]
Demo Scene Picture sinwav...
by
KodeZwerg
[
Today
at 10:26:21 pm]
fkInternalCalc
by
zraja
[
Today
at 09:31:07 pm]
A fairly simple sound sol...
by
KodeZwerg
[
Today
at 09:23:37 pm]
add new targets to make
by
marcov
[
Today
at 08:38:42 pm]
how to tweek fpmake to co...
by
marcov
[
Today
at 08:29:16 pm]
Quirky windows
by
ASerge
[
Today
at 07:07:16 pm]
[Request] Demo Scene Sub ...
by
Gigatron
[
Today
at 06:29:39 pm]
Unlocking Files
by
KodeZwerg
[
Today
at 06:03:08 pm]
[SOLVED] trunk bug for mi...
by
Key-Real
[
Today
at 05:56:32 pm]
Demo Scene Bitmap Font Sc...
by
Gigatron
[
Today
at 05:56:27 pm]
Compile/Convert Delphi pr...
by
Martin_fr
[
Today
at 05:43:11 pm]
Generics - correct syntax
by
Thaddy
[
Today
at 05:40:59 pm]
Lazarus for Windows on aa...
by
msintle
[
Today
at 05:32:42 pm]
InstallAware Using Lazaru...
by
msintle
[
Today
at 05:26:36 pm]
Xcode Command Line Tools ...
by
Joseph
[
Today
at 05:16:39 pm]
Offical launch of the 1 B...
by
Hartmut
[
Today
at 04:49:29 pm]
what to do if my target M...
by
nickysn
[
Today
at 04:16:02 pm]
compiler error in unit
by
paule32
[
Today
at 03:49:50 pm]
Can function be used for ...
by
VisualLab
[
Today
at 02:15:30 pm]
Multithreading - synchron...
by
mika
[
Today
at 01:48:51 pm]
May be useful to somebody
by
KodeZwerg
[
Today
at 12:38:22 pm]
match automatic highlight...
by
Чебурашка
[
Today
at 11:35:14 am]
Tchart with dual numbers ...
by
wp
[
Today
at 10:48:18 am]
« previous
next »
Print
Pages: [
1
]
Author
Topic: [CLOSED] Scrollbox detect vertical scroll (Read 1577 times)
pcurtis
Hero Member
Posts: 951
[CLOSED] Scrollbox detect vertical scroll
«
on:
January 28, 2022, 11:18:48 pm »
How can I detect when a scrollbox is vertically scrolled and when it can't scroll anymore?
NOT NEEDED ANYMORE
«
Last Edit: January 29, 2022, 12:23:05 pm by pcurtis
»
Logged
Windows 10 20H2
Laz 2.2.0
FPC 3.2.2
jamie
Hero Member
Posts: 6130
Re: Scrollbox detect vertical scroll
«
Reply #1 on:
January 29, 2022, 12:43:32 am »
https://docs.microsoft.com/en-us/windows/win32/controls/wm-vscroll
That may help you. With laz you use the LMessages and LM_VSCROLL I think..
otherwise you can use the windows unit and WM_VSCROLL to override the message
Logged
The only true wisdom is knowing you know nothing
jamie
Hero Member
Posts: 6130
Re: Scrollbox detect vertical scroll
«
Reply #2 on:
January 29, 2022, 12:48:50 am »
Quote from: pcurtis on January 28, 2022, 11:18:48 pm
How can I detect when a scrollbox is vertically scrolled and when it can't scroll anymore?
Hmm, maybe you are talking about the Position of the scrollbar and size of the client height.?
Logged
The only true wisdom is knowing you know nothing
Print
Pages: [
1
]
« previous
next »
Lazarus
»
Forum
»
Programming
»
LCL
»
[CLOSED] Scrollbox detect vertical scroll
TinyPortal
© 2005-2018