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from __future__ import annotations
import displayio
from micropython import const
from adafruit_ticks import ticks_ms, ticks_diff
from adafruit_midi.note_on import NoteOn
from adafruit_midi.note_off import NoteOff
from .util import hsv_to_rgb
try:
import synthio
except:
synthio = None
def clamp_norm(v):
return max(0, min(v, 1))
class Note:
keyboard: Keyboard
base: BaseMode
pitch: int
end_tick: None | int
expiry: float
def __init__(self, keyboard: Keyboard, pitch: int):
self.keyboard = keyboard
self.base = keyboard.modes["base"]
self.pitch = pitch
self.end_tick = None
self.expiry = 1.0
if self.keyboard.synth:
self.note = synthio.Note(
synthio.midi_to_hz(self.pitch), filter=self.keyboard.filter
)
def on(self, local=True):
self.base.notes[self.pitch] = self
self.base.notes_dirty = True
if self.keyboard.synth:
self.keyboard.synth.press(self.note)
msg = NoteOn(self.pitch, self.keyboard.velocity)
self.keyboard.broadcast(msg)
if local and self.keyboard.i2c:
self.keyboard.i2c.send(self, True)
if self.pitch in self.base.notes_expiring:
del self.base.notes_expiring[self.pitch]
def off(self, local=True):
if self.base.notes.get(self.pitch) is self:
self.base.notes_expiring[self.pitch] = self
del self.base.notes[self.pitch]
self.base.notes_dirty = True
if self.keyboard.synth:
self.keyboard.synth.release(self.note)
msg = NoteOff(self.pitch, self.keyboard.velocity)
self.keyboard.broadcast(msg)
if local and self.keyboard.i2c:
self.keyboard.i2c.send(self, False)
self.end_tick = ticks_ms()
def update_expiry(self, ticks_ms_now):
delta = ticks_diff(ticks_ms_now, self.end_tick)
if delta > self.keyboard.jam_timeout:
del self.base.notes_expiring[self.pitch]
self.expiry = 0
return
self.expiry = clamp_norm(1 - delta / self.keyboard.jam_timeout)
class Key:
MENU_I = const(48 + 0)
PREV_I = const(48 + 4)
NEXT_I = const(48 + 5)
keyboard: Keyboard
i: int
"""matrix index for this key."""
pos: tuple[float, int]
"""logical coordinates for this key."""
note: None | Note
pitch: int
def __init__(self, keyboard: Keyboard, i: int):
self.keyboard = keyboard
self.i = i
self.note = None
self.update_pos()
def update_pos(self):
x = self.i % 12
y = self.i // 12
if y % 2 == 0:
x += 0.5
if self.keyboard.flip:
x = 11.5 - x
else:
y = 3 - y
x += self.keyboard.offset[0]
y += self.keyboard.offset[1]
self.pos = (x, y)
def update_scale(self):
self.pitch = self.keyboard.layout.get_pitch(self)
def on_press(self):
if self.note:
self.note.off()
if self.pitch < 0 or self.pitch > 127:
return
self.note = Note(self.keyboard, self.pitch)
self.note.on()
def on_release(self):
if not self.note:
return
self.note.off()
self.note = None
class Mode:
keyboard: Keyboard
group: displayio.Group
color: tuple[float, float, float] = (0.5, 1.0, 0.5)
def __init__(self, keyboard: Keyboard):
self.keyboard = keyboard
self.group = displayio.Group()
def enter(self):
"""
Called when this mode becomes active.
"""
self.keyboard.display.root_group = self.group
def exit(self):
"""
Called when this mode becomes inactive.
"""
pass
def tick(self, ticks_ms: int):
"""
Called every 'tick' while this mode is active.
"""
pass
def key_event(self, i: int, pressed: bool) -> bool:
"""
Process a key event.
Return whether the next key event with this `i` should be delivered
to this mode, even if this mode is not active then (make it "sticky").
"""
return False
def update_pixels(self, pixels: NeoPixel):
"""
Callback to update RGB LEDs.
"""
pixels[0] = hsv_to_rgb(*self.color)
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