How is a frame/view implemented?

From: [at]} <René>
Date: Sat, 01 Nov 2003 11:36:32 +0100

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Hi there.

As far as I have understood, a view doesn't open a child window, if
displayed in a window, but the mapping directly uses a part of the
window dc. Can anyone confirm this?

At least that's what is implied by the Ogl-Subsystem and ObxBitmap.

This results in BitBlitting from a predefined dc to a part of the
window's dc. This seems ok for most usages, but a bit slow for
3D-graphic games.

So, I tried to do open a child window with the size of the view, using
f.rider(HostPorts.Rider).port.wnd as the parent window.

And though the child window was opened, it always was below the view
that was opened by StdCmds.PasteView, and though I did not implement
GetBackground, the view seemed not to be transparent at all = I didn't
see my child window.

Views.InstallFrame seems also no good, snice a child window has no
frame.

So, how would I go about this? The Ogl example seems not to be usable
with StdCmds.PasteView and StdCmds.Open, but implements its own Open
procedure that opens a new window. It is therefor an imperfect example
of a view (not usable as a
nested view).

Should I redefine a Frame for my view? What would need to be done?

I think that the source code of OleViews.NewObjectView would probably
answer these questions.

Rene
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Received on Sat Nov 01 2003 - 11:36:32 UTC