# HG changeset patch
# User Daniel O'Connor <darius@dons.net.au>
# Date 1462000034 -34200
# Node ID 71b78f06ff038ffba37ba545843d8bd172c35fc0
# Parent  63d13efa040f6bfc476a3b2ee06ccc6083973863
Highest notes are at the bottom not the top.
Rename margin to heel to match the builders nomenclature.

diff -r 63d13efa040f -r 71b78f06ff03 musiccutter.py
--- a/musiccutter.py	Fri Apr 29 17:36:46 2016 +0930
+++ b/musiccutter.py	Sat Apr 30 16:37:14 2016 +0930
@@ -18,20 +18,21 @@
         filename = 'test.midi'
     # Card layout from http://www.orgues-de-barbarie.com/wp-content/uploads/2014/09/format-cartons.pdf
     # Notes are read from right to left
-    m = Midi2PDF('notes', 120, 155, 5.5, 3.0, 6.0, 50, False, False, False, False, 12, 10, 'Helvetica', 12)
+    # Highest note is at the bottom (closest to the crank)
+    m = Midi2PDF('notes', 120, 155, 5.5, 3.3, 6.0, 50, False, False, False, False, 0, 10, 'Helvetica', 12)
     base, ext = os.path.splitext(filename)
     base = os.path.basename(base)
     m.processMidi(filename, base + '-%02d.pdf')
 
 class Midi2PDF(object):
-    def __init__(self, notefile, pagewidth, pageheight, pitch, slotsize, offset, leadin, timemarks, drawrect, notenames, notelines, noteoffset, timescale, fontname, fontsize):
+    def __init__(self, notefile, pagewidth, pageheight, pitch, slotsize, heel, leadin, timemarks, drawrect, notenames, notelines, noteoffset, timescale, fontname, fontsize):
         self.midi2note, self.note2midi = Midi2PDF.genmidi2note(noteoffset)
         self.note2slot, self.slot2note = Midi2PDF.loadnote2slot(notefile, self.note2midi)
         self.pagewidth = pagewidth # Dimensions are in millimetres
         self.pageheight = pageheight
         self.pitch = pitch # Distance between each slot
         self.slotsize = slotsize # Size of each slot cut out
-        self.offset = offset # Bottom margin
+        self.heel = heel # Bottom margin (from bottom of page to centre of slot)
         self.leadin = leadin # Extra at the start
         self.timemarks = timemarks # Draw vertical time lines
         self.drawrect = drawrect # Draw rectangle around each page
@@ -114,7 +115,7 @@
                     tend = tend + tsize * (pindx + 1)
                 for s in range(tstart, tend, 5):
                     x = self.pagewidth - (float(s * self.timescale + self.leadin) % self.pagewidth)
-                    pdf.line(x * mm, self.offset, x * mm, self.pageheight * mm)
+                    pdf.line(x * mm, self.heel, x * mm, self.pageheight * mm)
                     Midi2PDF.textHelper(pdf, x * mm, 1 * mm, ENGRAVE_COLOUR, False, self.fontname, self.fontsize, str(s) + 's')
 
             # Draw rectangle around page
@@ -123,7 +124,7 @@
 
             # Draw lines per note
             for slot in sorted(self.slot2note.keys()):
-                ofs = (self.offset + slot * self.pitch) * mm
+                ofs = (self.heel - self.slotsize / 2 + slot * self.pitch) * mm
                 if self.notelines:
                     pdf.line(0, ofs, self.pagewidth * mm, ofs)
                 # Note name
@@ -171,7 +172,7 @@
         pageidx = int(x / self.pagewidth) # Determine which page
         x = x % self.pagewidth # and where on that page
         h = self.slotsize
-        y = self.offset + slot * self.pitch + (self.pitch - h) / 2
+        y = self.pageheight - (self.heel + slot * self.pitch - self.slotsize / 2) - self.slotsize
         w = notelen * self.timescale # Convert note length in time to distance
 
         print 'page = %d x = %.3f y = %.3f w = %.3f h = %.3f' % (pageidx, x, y, w, h)