Re: [Lazarus] ScrollBox and Touchscreen interaction
On 07.04.2017 23:17, Sandro Cumerlato via Lazarus wrote:
> Current SVN trunk. Under Windows 10. Sorry for the missing info.
Mouse wheel messages are correctly passed through.
The problem is with touchpad double-finger scrolling because usually the
mouse driver takes care of it - it finds the TWinControl (control with
handle) under the mouse and scrolls it according to its scroll info. (At
least it is what I experienced with my Dell touchpad when I worked on
Currently I don't know how to solve it. Maybe there is a possibility to
get touchpad scrolling passing through windows as well - I haven't done
a thorough research yet. You can study the wheel message code in win32
and maybe you find a way to get touchpad scrolling work the same way.
The idea behind the process is easy - if you cannot scroll the window,
scroll recursively its parent (that can be scrolled).