Re: Named connection points

[Ron Wilson <wilsonronl gmail com>]

On Sun, Feb 19, 2012 at 7:00 AM,  <dia-list-request gnome org> wrote:
> Date: Sat, 18 Feb 2012 15:34:25 -0500
> From: Dan Katz <dpkatz bc gmail com>
> Yes of course.  I think it's a bit easier with names because you can introspect
> on them in the python REPL using 'dir' and 'help' and such, but looking up the
> text of the shape module isn't very hard either.  It's a bit harder with built-in
> shapes since you have to read the C code for those, but that's not my use
> case here.  I consider that the having a stable ordering of connection points
> is sufficient for my purposes.

I don't use Python, though I would think it would have a mechanism for
defining named constants in a file that can be included by reference
by your program.

In C/C++, something like the following could be done:

enum OpAmpCP {
    OpAmp_Pos,
    OpAmp_Neg,
    OpAmp_Out
};

Then in the program:

#include "shapeDefinitions.h"

/* other code */

ShapeType = parseShape(objectIndex, attributes, connections);
switch (ShapeType) {
    case OpAmp:
        makeConnection(objectIndex, OpAmp_Pos, connections[OpAmp_Pos]);
        /* more code */
    break;
    /* cases for other shapes */
}