ATFileNotif
About
ATFileNotif is simple component which detects file change. It uses timer, timer checks are file props (file exists; file size; file age) changed or not. It calls OnChanged.

Example
Example of function which starts file watch:
procedure TfmMain.NotifyFile;
begin
with ATFileNotif1 do
begin
Timer.Enabled:= False;
Timer.Interval:= 1000;
FileName:= edFileName.Text;
Timer.Enabled:= True;
end;
end;Download
Github: https://github.com/Alexey-T/ATFileNotif-Lazarus
License
MPL 2.0 or LGPL.
From the Free Pascal wiki, page "ATFileNotif", as it stood on 2020-02-09 after a change by Trev, out of the wiki's dump of 2024-05-26. Copyright stays with the author who wrote it, according to the old wiki's Licensing page. If you have concerns about this material, message the admin.