def function_voices_create(context: Context,
name: str,
modifiers: Node = None,
inherit: Voice = None):
if inherit != None:
pass
voice = Voice(name, Instrument(name, 1))
forked = context.fork()
forked.voice = voice
if inherit != None:
voice.instrument = inherit.instrument
voice.time_signature = inherit.time_signature
voice.velocity = inherit.velocity
voice.octave = inherit.octave
voice.value = inherit.value
voice.tempo = inherit.tempo
if modifiers != None:
if isinstance(modifiers, MusicSequenceNode):
for modifier in modifiers:
if isinstance(modifier, ContextModifierNode):
modifier.apply(voice)
else:
modifier.eval(forked)
else:
if isinstance(modifiers, ContextModifierNode):
modifiers.apply(voice)
else:
modifiers.eval(forked)
return voice
def __init__(self,
width: int,
height: int,
scroll_vertical: int = 0,
scroll_horizontal: int = 0,
time_signature=(4, 4),
tempo: int = 200,
bar_width: int = 60,
events_height: float = 2.0):
self.width = width
self.height = height
self.time_signature = time_signature
self.tempo = tempo
self.bar_width = 200 # bar_width
self.events_height = events_height
self.scroll_vertical = scroll_vertical
self.scroll_horizontal = scroll_horizontal
## CACHE
# Caching these properties allows avoiding recalculating them every
# frame
# The cache key is used to know when to invalidate all the calculated values
self.cache_key = None
# The voice used to calculate timings inside the viewport
self.cache_voice: Voice = Voice("",
None,
time_signature=self.time_signature,
tempo=self.tempo)
# How many pixels in width does one second occupy
self.cache_second_width: int = 0
# What are the lower and upper pitches that should be visible
self.cache_fit_pitch_amount: int = 0
self.cache_lower_pitch: int = 0
self.cache_upper_pitch: int = 0
# If the viewport height and event«s height don't subdivide perfectly
# There can be paddings equally distributed in the top and bottom
self.cache_vertical_padding: float = 0