TVirtualTreeColumns: Show column header text as hint in case column is to narrow

[Ajoschi]

Hi.

It would be great if the Text property of a header column (TVirtualTreeColumn.Text) would be shown as "mouse over" hint, in case the text does not fit completely into the header.

Consider:

• Do this only in case TVTHeaderOption.hoShowHint included in TVirtualStringTree.Header.Options.
• Do this only if Hint property of the related TVirtualTreeColumn is blank.

Thank you and regards,
Ajoschi

[joachimmarder]

TApplication.HintMouseMessage() is not called for the header, most likely because the header is in the non-client area. It works to intercept the WM_NCMOUSEMOVE message, but it does not work passing it on to TApplication.HintMouseMessage(): GetHintControl() returns nil, most likely again because the position is in the non-client area.

So it seems that all hint handling needs to be done manually to achieve the desired behavior, which is quite a lot of work and duplicate code.