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
a Unit problem?
by
Handoko
[
Today
at 12:15:34 pm]
JEDI error but unit compi...
by
Roland57
[
Today
at 11:50:11 am]
Using KeyPress event, how...
by
Bart
[
Today
at 11:32:53 am]
Configure JCF messages
by
DomingoGP
[
Today
at 11:26:55 am]
IDE instability on Raspbe...
by
rvk
[
Today
at 10:37:14 am]
Boleeman's projects are p...
by
AlexTP
[
Today
at 10:18:04 am]
Understanding and adjusti...
by
circular
[
Today
at 09:55:30 am]
Your best UI design - con...
by
circular
[
Today
at 09:36:11 am]
ZeosDBO and querys using ...
by
Zvoni
[
Today
at 09:27:17 am]
STARS with line border st...
by
Boleeman
[
Today
at 09:13:29 am]
Any upgrades to fpWeb pag...
by
AlexTP
[
Today
at 08:10:55 am]
Zeos components. Had to c...
by
dbannon
[
Today
at 07:26:11 am]
A button require administ...
by
Fibonacci
[
Today
at 05:57:21 am]
How to detect one externa...
by
d2010
[
Today
at 12:24:32 am]
Center Lost Window featur...
by
Tony Stone
[
Today
at 12:06:16 am]
Complex package installat...
by
wp
[March 27, 2024, 10:47:45 pm]
Controlling the behavior ...
by
wp
[March 27, 2024, 10:43:40 pm]
A "leisure" question on W...
by
EventHorizon
[March 27, 2024, 10:18:38 pm]
need advice about the fol...
by
jamie
[March 27, 2024, 09:56:39 pm]
[SOLVED] Completion box s...
by
Martin_fr
[March 27, 2024, 08:44:09 pm]
Dialog ShowModal and an i...
by
d7_2_laz
[March 27, 2024, 08:25:18 pm]
Offical launch of the 1 B...
by
Gustavo 'Gus' Carreno
[March 27, 2024, 07:41:48 pm]
Problem setting length of...
by
Remy Lebeau
[March 27, 2024, 05:41:10 pm]
TDBLookupcombobox seems u...
by
Fantablup
[March 27, 2024, 05:18:04 pm]
Poll: Watches and Display...
by
Martin_fr
[March 27, 2024, 03:58:57 pm]
« previous
next »
Print
Pages: [
1
]
Author
Topic: [CLOSED] Scrollbox detect vertical scroll (Read 1545 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: 6090
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: 6090
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