-
Notifications
You must be signed in to change notification settings - Fork 0
/
chorddiagram.py
422 lines (361 loc) · 15.9 KB
/
chorddiagram.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.scrollview import ScrollView
from kivy.uix.label import Label
from kivy.uix.bubble import Bubble
from kivy.uix.popup import Popup
from kivy.properties import ListProperty, NumericProperty, ReferenceListProperty, ObjectProperty, \
StringProperty, BooleanProperty
from kivy.metrics import dp
from music_constants import chrom_scale
ROW_HEIGHT = dp(95)
class ChordDiagramBubble(Bubble):
def __init__(self, voicing, chord_diagram, **kwargs):
super().__init__(**kwargs)
self.size_hint = [None, None]
self.pos_hint = {'center': [0.5, 0.5]}
self.size = [100, 50]
self.voicing = voicing
self.chord_diagram = chord_diagram
def select(self, *args):
print('selected!')
self.chord_diagram.popup.voicing = self.voicing
self.chord_diagram.remove_bubble()
def delete(self, *args):
print("ChordDiagramBubble.delete() not hooked up to anything")
print(f"Would be deleting voicing {voicing}")
self.chord_diagram.remove_bubble()
class ChordDiagram(FloatLayout):
chrom_scale = chrom_scale
voicing = ListProperty([None, None, None, None, None, None])
note_idx = NumericProperty(0)
root_note_idx = NumericProperty(0)
chord_name = StringProperty('')
chord_num = NumericProperty()
mode_filter = NumericProperty(0b101011010101)
display = ObjectProperty(None)
# chord_in_key = BooleanProperty(False)
diagram = ObjectProperty(None)
draw_x = NumericProperty(0)
draw_y = NumericProperty(0)
step_x = NumericProperty(0)
step_y = NumericProperty(0)
line_weight = NumericProperty(1)
nut_height = NumericProperty(0)
nut_opac = NumericProperty(1)
disable_opac = NumericProperty(0)
s6_open_mark_opac = NumericProperty(1)
s5_open_mark_opac = NumericProperty(1)
s4_open_mark_opac = NumericProperty(1)
s3_open_mark_opac = NumericProperty(1)
s2_open_mark_opac = NumericProperty(1)
s1_open_mark_opac = NumericProperty(1)
open_mark_opacs = ReferenceListProperty(s6_open_mark_opac, s5_open_mark_opac, s4_open_mark_opac,
s3_open_mark_opac, s2_open_mark_opac, s1_open_mark_opac)
s6_x_mark_opac = NumericProperty(1)
s5_x_mark_opac = NumericProperty(1)
s4_x_mark_opac = NumericProperty(1)
s3_x_mark_opac = NumericProperty(1)
s2_x_mark_opac = NumericProperty(1)
s1_x_mark_opac = NumericProperty(1)
x_mark_opacs = ReferenceListProperty(s6_x_mark_opac, s5_x_mark_opac, s4_x_mark_opac,
s3_x_mark_opac, s2_x_mark_opac, s1_x_mark_opac)
marker_radius = NumericProperty(0)
s6_marker_opac = NumericProperty(1)
s5_marker_opac = NumericProperty(1)
s4_marker_opac = NumericProperty(1)
s3_marker_opac = NumericProperty(1)
s2_marker_opac = NumericProperty(1)
s1_marker_opac = NumericProperty(1)
marker_opacs = ReferenceListProperty(s6_marker_opac, s5_marker_opac, s4_marker_opac,
s3_marker_opac, s2_marker_opac, s1_marker_opac)
s6_red = NumericProperty(1)
s5_red = NumericProperty(1)
s4_red = NumericProperty(1)
s3_red = NumericProperty(1)
s2_red = NumericProperty(1)
s1_red = NumericProperty(1)
marker_reds = ReferenceListProperty(s6_red, s5_red, s4_red, s3_red, s2_red, s1_red)
s6_fret_y = NumericProperty(0)
s5_fret_y = NumericProperty(0)
s4_fret_y = NumericProperty(0)
s3_fret_y = NumericProperty(0)
s2_fret_y = NumericProperty(0)
s1_fret_y = NumericProperty(0)
fret_ys = ReferenceListProperty(s6_fret_y, s5_fret_y, s4_fret_y, s3_fret_y, s2_fret_y, s1_fret_y)
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.chrom_scale = chrom_scale
self.is_popup = False
self.bubble = None
self.popup = None
self.selected = False
self.disabled = False
def on_chord_num(self, *args):
self.update_diagram()
def on_note_idx(self, *args):
self.update_diagram()
def on_root_note_idx(self, *args):
self.update_diagram()
def on_mode_filter(self, *args):
self.update_diagram()
def on_voicing(self, *args):
self.update_diagram()
def on_size(self, *args):
target_ratio = 27 / 28 # width / height
if self.width / self.height > target_ratio:
# available space is wider than desired width
self.diagram.height = self.height
self.diagram.width = target_ratio * self.height
else:
self.diagram.height = self.width / target_ratio
self.diagram.width = self.width
if any(self.voicing):
self.update_diagram()
#################################### DRAWING METHODS #########################################
def update_diagram(self, *args):
if self.is_chord_in_key():
self.draw_diagram()
else:
self.disable()
def is_chord_in_key(self):
def do_circular_bit_rotation(num_shifts, mode):
for _ in range(num_shifts):
rotate_bit = 0b100000000000 & mode
mode <<= 1
if rotate_bit:
rotate_bit = 1
else:
rotate_bit = 0
mode |= rotate_bit
mode &= 0b111111111111
return mode
# C Major Scale = 0b101011010101
# C D EF G A B
# Any Major Chord = 0b100010010000
# To test if D Major is in C Major scale, rotate C Major Scale 2 bits, so D is leftmost.
# C rooted at D = 0b101101010110
# D Major Chord = 0b100010010000
# D Major Chord has 1 bit set that is not in C rooted at D, therefore
# D Major Chord is not in the C Major scale.
if self.note_idx >= self.root_note_idx:
num_shifts = self.note_idx - self.root_note_idx
else:
num_shifts = 12 - (self.root_note_idx - self.note_idx)
rotated_mode = do_circular_bit_rotation(num_shifts, self.mode_filter)
chord_mask = int(self.chord_num)
# Are all the notes that make this chord also in this mode/key?
chord_in_key = rotated_mode & chord_mask == chord_mask
# print(chrom_scale[self.note_idx], " ", self.chord_name, chord_in_key)
return chord_in_key
def draw_diagram(self):
if not self.voicing or not any(fret_num for fret_num in self.voicing):
self.disable_opac = 0
self.disabled = False
return
slid_voicing = self.slide_voicing(self.voicing)
min_fret = min(fret_num for fret_num in slid_voicing if fret_num is not None)
has_fret_0 = any(fret_num == 0 for fret_num in slid_voicing)
if has_fret_0:
self.nut_opac = 1
self.ids.fret_label.text = ''
min_fret = 1
else:
self.nut_opac = 0
self.ids.fret_label.text = str(min_fret)
# fret markers closest to nut need to move the most step_y's.
for i, fret_num in enumerate(slid_voicing):
if fret_num is None:
self.draw_muted_string(i)
elif fret_num == 0:
self.draw_open_string(i)
else:
self.draw_fingered_string(i, fret_num, min_fret)
self.disable_opac = 0
self.disabled = False
def slide_voicing(self, voicing):
# ALL chord voicings are rooted at C. Slide appropriate number of frets.
slid_voicing = voicing[:] # Make a copy to avoid infinite loop.
for i, fret_num in enumerate(slid_voicing):
if fret_num is not None:
slid_voicing[i] = fret_num + self.note_idx
if all(fret_num is None or fret_num >= 12 for fret_num in slid_voicing):
slid_voicing[:] = [fret_num % 12 if fret_num is not None else None for fret_num in slid_voicing]
return slid_voicing
def draw_muted_string(self, string_idx):
self.open_mark_opacs[string_idx] = 0
self.x_mark_opacs[string_idx] = 1
self.marker_opacs[string_idx] = 0
self.marker_reds[string_idx] = 0
self.fret_ys[string_idx] = 0
def draw_open_string(self, string_idx):
self.open_mark_opacs[string_idx] = 1
self.marker_opacs[string_idx] = 0
self.marker_reds[string_idx] = 0
self.fret_ys[string_idx] = 0
self.x_mark_opacs[string_idx] = 0
def draw_fingered_string(self, string_idx, fret_num, min_fret):
self.open_mark_opacs[string_idx] = 0
self.marker_opacs[string_idx] = 1
self.marker_reds[string_idx] = 0
self.fret_ys[string_idx] = 0
self.x_mark_opacs[string_idx] = 0
# fret_y moves marker up the fretboard vertically, to lower notes.
fret_y = self.step_y * 3
steps_down = fret_num - min_fret
self.fret_ys[string_idx] = fret_y - steps_down * self.step_y
def disable(self):
for string_idx in range(6):
self.open_mark_opacs[string_idx] = 0
self.marker_opacs[string_idx] = 0
self.marker_reds[string_idx] = 0
self.fret_ys[string_idx] = 0
self.x_mark_opacs[string_idx] = 0
self.disable_opac = 1
self.disabled = True
#################################### POPUP METHODS ###########################################
def on_touch_up(self, touch):
if self.collide_point(touch.x, touch.y) and self.is_popup:
if self.selected:
self.center = self.ox, self.oy
self.selected = False
elif not self.bubble:
self.bubble = bubble = ChordDiagramBubble(self.voicing, self)
self.bind(pos=bubble.setter('pos'))
self.add_widget(bubble)
print('bubble added')
else:
super().on_touch_down(touch)
if self.bubble:
self.remove_bubble()
if self.selected:
self.center = self.ox, self.oy
self.selected = False
return True
def remove_bubble(self, *args):
self.remove_widget(self.bubble)
self.bubble = None
def on_touch_down(self, touch):
if self.collide_point(touch.x, touch.y) and self.is_popup:
self.selected = True
self.ox, self.oy = self.cur_x, self.cur_y = self.center
return True
def on_touch_move(self, touch):
if self.collide_point(touch.x, touch.y) and self.is_popup and self.selected:
dx, dy = touch.x - self.cur_x, touch.y - self.cur_y
self.translate(dx, dy)
return True
def translate(self, dx, dy):
self.center_x = self.cur_x = self.cur_x + dx
self.center_y = self.cur_y = self.cur_y + dy
class ChordDiagramMain(FloatLayout):
note_idx = NumericProperty(0)
root_note_idx = NumericProperty(0)
chord_num = NumericProperty(0)
mode_filter = NumericProperty(0b101011010101)
chord_diagram = ObjectProperty(None)
display = ObjectProperty(None)
voicings = ListProperty([])
chord_name = StringProperty('')
voicing = ListProperty([None, None, None, None, None, None])
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.popup = None
def on_touch_down(self, touch):
if self.collide_point(touch.x, touch.y):
if self.popup:
self.popup.dismiss()
self.popup = None
elif not self.chord_diagram.disabled:
full_chord_name = chrom_scale[self.note_idx] + " " + self.chord_name
title = full_chord_name + " Alternative Voicings"
content = ChordDiagramPopupContent(note_idx=self.note_idx,
root_note_idx=self.root_note_idx,
chord_num=self.chord_num,
mode_filter=self.mode_filter,
chord_name=self.chord_name,
voicings=self.voicings)
self.popup = ChordDiagramPopup(title=title,
content=content,
width=content.width * 1.2)
content.bind(voicing=self.popup.setter('voicing'))
self.popup.bind(voicing=self.setter('voicing'))
self.popup.open()
return True
return super().on_touch_down(touch)
def on_voicings(self, *args):
if self.voicings:
self.chord_diagram.voicing = self.voicings[0]
def on_voicing(self, *args):
self.chord_diagram.voicing = self.voicing
class ChordDiagramPopup(Popup):
voicing = ListProperty()
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.size_hint = [None, None]
self.height = ROW_HEIGHT * 7
class ChordDiagramPopupContent(ScrollView):
voicing = ListProperty()
def __init__(self, note_idx, root_note_idx, chord_num,
mode_filter, chord_name, voicings, **kwargs):
super().__init__(**kwargs)
self.pos_hint = {'center_x': 0.5}
self.size_hint = [None, None]
self.height = ROW_HEIGHT * 6
self.scroll_grid = BoxLayout(orientation='horizontal',
size_hint=[None, None],
pos_hint={'center_x': 0.5})
self.add_columns()
self.build_title_bar()
self.build_columns(note_idx, root_note_idx, chord_num, mode_filter, chord_name, voicings)
# Child widgets are displayed right to left in horizontal BoxLayout; reverse this.
self.scroll_grid.children = self.scroll_grid.children[::-1]
self.width = self.scroll_grid.width
self.add_widget(self.scroll_grid)
def add_columns(self):
for i in range(4):
column = BoxLayout(orientation='vertical',
size_hint=[None, None],
pos_hint={'top': 1},
spacing=1)
self.scroll_grid.add_widget(column)
def build_title_bar(self):
# Add labels for chords rooted at string 6, 5, 4, 3.
# String 6 is children[0], 5 is children[1], 4 is children[2], 3 is children[3].
for i in range(6, 2, -1):
label = Label(text='Root ' + str(i) + ' string', size_hint_y=None, height=ROW_HEIGHT/2)
column = self.scroll_grid.children[6 - i]
column.add_widget(label)
def build_columns(self, note_idx, root_note_idx, chord_num, mode_filter, chord_name, voicings):
def get_col_idx(voicing):
for i, fret_num in enumerate(voicing):
if fret_num is not None:
return i
for voicing in voicings:
column_idx = get_col_idx(voicing)
column = self.scroll_grid.children[column_idx]
cd = ChordDiagram()
cd.is_popup = True
cd.popup = self
cd.note_idx = note_idx
cd.root_note_idx = root_note_idx
cd.chord_num = chord_num
cd.mode_filter = mode_filter
cd.chord_name = chord_name
cd.voicing = voicing
column.add_widget(cd)
# Set scroll_grid width. Error is voicings is empty.
if voicings:
self.scroll_grid.width = column.width * 4
# Set the column and scroll_grid heights.
for column_idx in range(4):
column = self.scroll_grid.children[column_idx]
height = ROW_HEIGHT * len(column.children) - (ROW_HEIGHT / 2)
column.height = height
self.scroll_grid.height = max(self.scroll_grid.height, height)
class ChordDiagramApp(App):
def build(self):
return ChordDiagram()
if __name__ == "__main__":
ChordDiagramApp().run()