Mouse wheel scroll does not work in Win7

ScaleRichView support and discussion (TRichView add-on for WYSIWYG editing)
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wolf1860
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Mouse wheel scroll does not work in Win7

Post by wolf1860 »

I tested this on couple of PC, the mouse wheel worked perfect in Win10,but did not work in Win7,I changed 3 PC (win7).

Sergey Tkachenko
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Re: Mouse wheel scroll does not work in Win7

Post by Sergey Tkachenko »

What version of Delphi do you use to compile applications?

wolf1860
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Re: Mouse wheel scroll does not work in Win7

Post by wolf1860 »

Delphi 10.2

Sergey Tkachenko
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Re: Mouse wheel scroll does not work in Win7

Post by Sergey Tkachenko »

I confirm the problem: no mouse wheel scrolling in TSRichViewEdit in Windows versions prior to 10, for applications compiled in RAD Studio 10.1 and 10.2
It will be fixed in the next update (I'll try to upload it later today)

wolf1860
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Re: Mouse wheel scroll does not work in Win7

Post by wolf1860 »

Thanks a lot:) I'm waiting for the new version.

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Re: Mouse wheel scroll does not work in Win7

Post by Sergey Tkachenko »

Sorry for the delay, it is uploaded today (for registered users)

tsvetus
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Re: Mouse wheel scroll does not work in Win7

Post by tsvetus »

Downloaded latest version of TSRichViewEdit. Now modules compiled on Windows 10 machine with RAD Studio 10.2 work fine on Windows 7 or prior but on Windows 10 scrolling does not work!

Sergey Tkachenko
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Re: Mouse wheel scroll does not work in Win7

Post by Sergey Tkachenko »

Make sure that you completely recompiled your application (Project | Build All Project).

If the problem still persists, I ask you to do some tests.
The first of them. Please open SclRView.pas, find TSRichViewEdit.DoMouseWheel.
It must be:

Code: Select all

function TSRichViewEdit.DoMouseWheel(Shift: TShiftState; WheelDelta: Integer;
      MousePos: TPoint): Boolean;
begin
  Result := inherited DoMouseWheel(Shift, WheelDelta, MousePos);
  if RVWIN10 and not Result then
    HookMouseWheelEvent(Self, Shift, WheelDelta, MousePos, Result);
end;
Is it correct? Compile your application with debug info. Put a breakpoint at the beginning of this method. Is it called when you scroll with a mouse wheel?

PS: please pay attention: in older versions of Windows, mouse wheels scrolls the focused control. In Windows 10, mouse wheels scrolls the control below the mouse pointer.

tsvetus
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Re: Mouse wheel scroll does not work in Win7

Post by tsvetus »

Thank you for support. The problem is still persists. HookMouseWheelEvent in TSRichViewEdit.DoMouseWheel event is never called because variable RVWIN10 is false. In addition the vi.dwMajorVersion == 6 in RVUni.RVCheckNT but we have Windows 10 Pro x64.

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Re: Mouse wheel scroll does not work in Win7

Post by Sergey Tkachenko »

If dwMajorVersion = 6, this means that your application is not marked as Win10-compatible.
I thought that the difference in mouse wheel processing in applications compiled in 10.1 and 10.2 is because they are marked as Win10-compatible (in their manifest). Currently, I have no other ideas.

If you do not have special reasons for using a custom manifest, change in Project | Options, Application, Manifest file = Auto Generate.

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