Recent

« previous next »
Pages: [1]

Author Topic: [CLOSED] Scrollbox detect vertical scroll  (Read 1274 times)

pcurtis

  • Hero Member
  • *****
  • Posts: 935
[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: 4582
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: 4582
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
Pages: [1]
« previous next »
 

TinyPortal © 2005-2018