
# tweaks.py

"""
This module is an integeral part of the program
MMA - Musical Midi Accompaniment.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

Bob van der Poel <bob@mellowood.ca>

This module has support for some simple default tweaks.

"""

from MMA.common import *
import MMA.pat
import MMA.midiC

import copy

def setTweak(ln):
    """ Option tweaks. """

    notopt, ln = opt2pair(ln)

    if notopt:
        error("Tweaks: expecting cmd=opt pairs, not '%s'." % ' '.join(notopt) )
        
    for cmd, opt in ln:
        cmd=cmd.upper()

        if cmd == 'DEFAULTDRUM':
            MMA.pat.defaultDrum = MMA.midiC.decodeVoice(opt)

        elif cmd == 'DEFAULTVOICE':
            MMA.pat.defaultVoice = MMA.midiC.decodeVoice(opt)

        elif cmd == 'DIM':
            from MMA.chordtable import chordlist

            if opt == '3':
                # this is so we can change the desc. (no non-standard)
                chordlist['dim'] = (chordlist['dim3'][0], chordlist['dim3'][1], "Diminished triad")
            elif opt == '7':
                chordlist['dim'] = copy.deepcopy(chordlist['dim7'])
            else:
                error("Tweaks: DIM requires '3' or '7' arg, not '%s'." % opt)

        else:
            error("Tweaks: '%s' unknown command." % cmd)
