Generic View operations

From: Wijck, Bart van <"Wijck,>
Date: Fri, 4 Jun 2004 14:38:48 +0200

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All,

Can anyone enlighten me. When I first came accross Views I thought there
would be a series of generic operations for copying, displaying, printing
etc. any view type.

However Text Views are for example displayed as follows:
                v := TextViews.dir.New(t); (* create a text view for
the text generated above *)
                Views.OpenView(v) (* open the text
view in its own window *)

Whereas the more generic Views from the chapter View Construction follow a
more convoluted path in order to display:
        PROCEDURE Deposit*;
                VAR v: View;
        BEGIN
                NEW(v); Views.Deposit(v)
        END Deposit;

        To execute this program, invoke the following command:

        <commander>"ObxViews0.Deposit; StdCmds.Open"

Why is this different per view type instead of generic for all views types.

Second the "generic" Views of the chapter View Construction appear more
primitive (you need to have compulsary Up calls like Deposit etc.).
Apparently the Text and Form Views are at a higher level and this more
primitive level is hidden. Correct?

Regards, Bart

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Received on Fri Jun 04 2004 - 14:38:48 UTC