From: jsa@alexandria (Jon S Anthony)
Subject: Re: Help ! - Problems with Ada/X (using Apex & Axi-Serc X-Bindings)
Date: 1996/08/13
Date: 1996-08-13T00:00:00+00:00 [thread overview]
Message-ID: <JSA.96Aug13130556@alexandria> (raw)
In-Reply-To: 01bb87e1.6df84880$277c02cb@default
In article <01bb87e1.6df84880$277c02cb@default> "Bernie Rossi" <bernie@adam.com.au> writes:
> to convert some working X code in 'C' (my language of choice) to Ada.
Use the Intermetrics X/Motif bindings:
-- X11/Motif
--
http://www.inmet.com/~mg/x11ada/x11ada.html
> I would appreciate any source or help that anyone can provide.
These bindings allow you to pretty much directly copy your C stuff into
Ada.
> WidgetList children; /* Defining a pointer to a WidgetList
> */
>
> XtVaGetValues(Form, XmNchildren, &children, NULL); /* Get Ptr */
In Ada:
function "&" is new Stdarg.Concat(Xt.Intrinsic.Widget);
Children : aliased array(1..whatever) of aliased Xt.Intrinsic.Widget;
Xt.Intrinsic.XtVaGetValues(
Form, Stdarg.Empty &
Motif.Xmstrdefs.XmNchildren & Children(1)'Access & Nulst );
You can, of course, use "use" if you don't like the qualified notation.
> Now I can get/set attributes eg;
Piece o'cake:
Width : aliased Integer;
Xt.Intrinsic.XtVaGetValues(
Children(1), Stdarg.Empty &
Motif.Xmstrdefs.XmNwidth & Width'Access &
Nulst);
Xt.Intrinsic.XtVaSetValues(
Children(2), Stdarg.Empty &
Motif.Xmstrdefs.XmNwidth & Width*2 &
Nulst);
>
> XtVaGetValues(children[0], XmNwidth, &width, NULL); /* Get Value */
> XtVaSetValues(children[1], XmNwidth, width*2, NULL); /* Set Value */
>
> When I re-write this in Ada the results are un-predicatble & wrong
> causing core dumps etc. Note the problem is getting the WidgetList
> only, I can successfully Get/Set values once I have a Widget.
I do this all the time: No problemo.
> 2. Trying to Override the Resize of a Widget.
Same sort of thing.
/Jon
--
Jon Anthony
Organon Motives, Inc.
1 Williston Road, Suite 4
Belmont, MA 02178
617.484.3383
jsa@organon.com
next prev parent reply other threads:[~1996-08-13 0:00 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
1996-08-12 0:00 Help ! - Problems with Ada/X (using Apex & Axi-Serc X-Bindings) Bernie Rossi
1996-08-13 0:00 ` Jon S Anthony [this message]
1996-08-13 0:00 ` Ted Dennison
1996-08-14 0:00 ` Paul Hussein
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