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PreciseButtonSliderElement.py
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PreciseButtonSliderElement.py
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#! /usr/bin/env python
# emacs-mode: -*- python-*-
from consts import *
from _Framework.ButtonSliderElement import ButtonSliderElement
from _Framework.InputControlElement import *
from ConfigurableButtonElement import ConfigurableButtonElement
SLIDER_MODE_SINGLE = 0
SLIDER_MODE_VOLUME = 1
SLIDER_MODE_PAN = 2
SLIDER_MODE_PARAMETER = 3
class PreciseButtonSliderElement(ButtonSliderElement):
" Class representing a set of buttons used as a slider "
def __init__(self, buttons):
ButtonSliderElement.__init__(self, buttons)
num_buttons = len(buttons)
self._disabled = False
self._mode = SLIDER_MODE_VOLUME
self._value_map = tuple([ float((index / num_buttons)) for index in range(num_buttons) ])
self._parent = None
self._precision_mode = False
def set_parent(self,parent):
self._parent=parent
def set_disabled(self, disabled):
assert isinstance(disabled, type(False))
self._disabled = disabled
def set_precision_mode(self,precision_mode):
self._precision_mode=precision_mode
def set_mode(self, mode):
assert (mode in (SLIDER_MODE_SINGLE,
SLIDER_MODE_VOLUME,
SLIDER_MODE_PAN,
SLIDER_MODE_PARAMETER))
if (mode != self._mode):
self._mode = mode
def set_value_map(self, map):
assert isinstance(map, (tuple,
type(None)))
assert (len(map) == len(self._buttons))
self._value_map = map
def send_value(self, value):
if (not self._disabled):
assert (value != None)
assert isinstance(value, int)
assert (value in range(128))
if (value != self._last_sent_value):
if (self._mode == SLIDER_MODE_SINGLE):
ButtonSliderElement.send_value(self, value)
elif (self._mode == SLIDER_MODE_VOLUME):
self._send_value_volume(value)
elif (self._mode == SLIDER_MODE_PAN):
self._send_value_pan(value)
elif (self._mode == SLIDER_MODE_PARAMETER):
self._send_value_parameter(value)
else:
assert False
self._last_sent_value = value
def connect_to(self, parameter):
ButtonSliderElement.connect_to(self, parameter)
if (self._parameter_to_map_to != None):
self._last_sent_value = -1
self._on_parameter_changed()
def release_parameter(self):
old_param = self._parameter_to_map_to
ButtonSliderElement.release_parameter(self)
if ((not self._disabled) and (old_param != None)):
for button in self._buttons:
button.reset()
def reset(self):
if ((not self._disabled) and (self._buttons != None)):
for button in self._buttons:
if (button != None):
button.reset()
def _send_value_volume(self, value):
index_to_light = -1
normalised_value = (float(value) / 127.0)
if (normalised_value > 0.0):
for index in range(len(self._value_map)):
if (normalised_value <= self._value_map[index]):
index_to_light = index
break
self._send_mask(tuple([ (index <= index_to_light) for index in range(len(self._buttons)) ]))
def _send_value_parameter(self, value):
index_to_light = -1
normalised_value = (float(value)*float((len(self._value_map)-1)) / 127.0)
if (value >0):
for index in range(len(self._value_map)):
if (normalised_value <= index):
index_to_light = index
break
self._send_mask(tuple([ (index <= index_to_light) for index in range(len(self._buttons)) ]))
def _send_value_pan(self, value):
num_buttons = len(self._buttons)
button_bits = [ False for index in range(num_buttons) ]
normalised_value = (float(((2 * value) / 127.0)) - 1.0)
if (value in (63, 64)):
normalised_value = 0.0
if (normalised_value < 0.0):
for index in range(len(self._buttons)):
button_bits[index] = (self._value_map[index] >= normalised_value)
if (self._value_map[index] >= 0):
break
elif (normalised_value > 0.0):
for index in range(len(self._buttons)):
r_index = ((len(self._buttons) - 1) - index)
button_bits[r_index] = (self._value_map[r_index] <= normalised_value)
if (self._value_map[r_index] <= 0):
break
else:
for index in range(len(self._buttons)):
button_bits[index] = (self._value_map[index] == normalised_value)
self._send_mask(tuple(button_bits))
def _send_mask(self, mask):
assert isinstance(mask, tuple)
assert (len(mask) == len(self._buttons))
for index in range(len(self._buttons)):
if mask[index]:
self._buttons[index].turn_on()
else:
self._buttons[index].turn_off()
def _button_value(self, value, sender):
assert isinstance(value, int)
assert (sender in self._buttons)
self._last_sent_value = -1
if ((not self._disabled) and ((value != 0) or (not sender.is_momentary()))):
index_of_sender = list(self._buttons).index(sender)
## handle precision mode
if(self._precision_mode):
#if self._parameter_to_map_to.max==126 and self._parameter_to_map_to.min==0:
#if 0 to 126 increment by one
# inc = 1
#elif self._parameter_to_map_to.max==127 and self._parameter_to_map_to.min==0:
#if 0 to 126 increment by one
# inc = 1
#else:
#double precision by default
inc = float(self._parameter_to_map_to.max-self._parameter_to_map_to.min)/64
inc = int(inc)
#self._parent._parent._parent.log_message(str(self._parameter_to_map_to.min))
if index_of_sender>=4:
if self._parameter_to_map_to.value+inc*(index_of_sender-3)<=self._parameter_to_map_to.max:
self._parameter_to_map_to.value = self._parameter_to_map_to.value+inc*(index_of_sender-3)
else:
self._parameter_to_map_to.value = self._parameter_to_map_to.max
else:
if self._parameter_to_map_to.value-inc*(4-index_of_sender) >= self._parameter_to_map_to.min:
self._parameter_to_map_to.value = self._parameter_to_map_to.value-inc*(4-index_of_sender)
else:
self._parameter_to_map_to.value = self._parameter_to_map_to.min
else:
if (self._parameter_to_map_to != None):
self._parameter_to_map_to.value = self._value_map[index_of_sender]
for notification in self._value_notifications:
callback = notification["Callback"]
if notification["Identify"]:
callback(midi_value, self)
else:
callback(midi_value)
def _on_parameter_changed(self):
assert (self._parameter_to_map_to != None)
param_range = abs((self._parameter_to_map_to.max - self._parameter_to_map_to.min))
param_value = self._parameter_to_map_to.value
param_min = self._parameter_to_map_to.min
param_mid = ((param_range / 2) + param_min)
if(self._mode==SLIDER_MODE_PARAMETER):
self._value_map=tuple([ float((self._parameter_to_map_to.max-self._parameter_to_map_to.min) * index/(len(self._buttons)-1)+self._parameter_to_map_to.min) for index in range(len(self._buttons)) ])
midi_value = 0
if (self._mode == SLIDER_MODE_PAN):
if (param_value == param_mid):
midi_value = 64
else:
diff = ((abs((param_value - param_mid)) / param_range) * 127)
if (param_value > param_mid):
midi_value = (64 + int(diff))
else:
midi_value = (63 - int(diff))
else:
midi_value = int(((127 * abs((param_value - self._parameter_to_map_to.min))) / param_range))
self.send_value(midi_value)
# local variables:
# tab-width: 4