CODEWITHSUNDEEP
delphi
IceCold
IceCold

Reputation: 21194

Why Show is not restoring the form?

This is more like a theoretic question: I am curious why the Show method will not also restore the form (like wsNormal).

I know that Show does not set WindowState:

procedure TCustomForm.Show;
begin
  Visible := True;
  BringToFront;
end;

but why? I mean, I expect the form to actually show up on screen, when I call Show. Obviously, this will not ALWAYS happen. More exactly, it will not happen when the window is minimized.

So, what is the logic behind Show? Why they left out WindowsState?

Upvotes: 1

Views: 121

Answers (1)

David Heffernan
David Heffernan

Reputation: 613332

Visibility and window state are simply independent properties. It is perfectly reasonably that you may wish to change one but not the other.

The design choice made by the VCL designers was to map the underlying Win32 library to the VCL in as fairly direct manner. This means that VCL designers can have flexibility to make their own choices. Were the VCL designed the way that you suggest it would make it much more difficult to change visibility without also changing window state, for example.

Upvotes: 2

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