VirtualGridMode: when using Showing := (Index mod 2) = 0; PageUp is not working anymore.
See source below and now it works. If this source is a better solution can you implement it?
function TNxListGridView6.GetFirstRowInPage: Integer;
function FindFirstRowInPage: Integer;
begin
Result := FFirstIndex;
while Result < RowCount do
begin
if Showing[Result] then
begin
Break;
end;
Inc(Result);
end;
end;
begin
if (VirtualMode) then Result := FindFirstRowInPage
else Result := FFirstIndex;
// Result := FFirstIndex;
{ TODO: Solve better FindFirstRowInPage for VirtualMode }
// if VirtualMode then Result := FindFirstRowInPage else Result := FFirstIndex;
end;
And the old one is not good because it's not looking at the first row in Page.
You can remove i think? Or rewrite it. That's better i think because i use something like this to calculate de Row center of the Page.
It's never been used in your sources.
///<summary></summary>
///<returns>Index of first row in Page</returns>
///<author>Eduard</author>
function TNxGridView6.FindFirstRowInPage: Integer;
var
Count: Integer;
begin
{ 8/28/16: Changed 0 to -1 }
Result := -1;
Count := 0;
while Result < RowCount do
begin
Inc(Result);
if Showing[Result] then
begin
Inc(Count);
if Count > VertScrollBar.Position then Break;
end;
end;
end;
Kind regards,
Eduard. 
