def __init__(self, **kwargs):
super(CustomWheel, self).__init__(**kwargs)
self.newColor = (0, 0, 0, 0)
self.__color_step_size = [0.0, 0.0, 0.0]
self.__updatesPerBeat = 10
self.__playBackHandler = PlayBackHandler(bpm=60.0, updatesPerBeat=self.__updatesPerBeat)
self.__playBackHandler.addIntervalUpdateCallback(self.fade_step_callback)
class CustomWheel(Widget):
IDX_RED = 0
IDX_GREEN = 1
IDX_BLUE = 2
color = ListProperty((1, 1, 1, 1))
screen_color = ListProperty((1, 1, 1, 1))
bpm = NumericProperty(60.0)
fade_time_in_beats = NumericProperty(0.0)
def __init__(self, **kwargs):
super(CustomWheel, self).__init__(**kwargs)
self.newColor = (0, 0, 0, 0)
self.__color_step_size = [0.0, 0.0, 0.0]
self.__updatesPerBeat = 10
self.__playBackHandler = PlayBackHandler(bpm=60.0, updatesPerBeat=self.__updatesPerBeat)
self.__playBackHandler.addIntervalUpdateCallback(self.fade_step_callback)
def on_bpm(self, obj, newBpm):
self.__playBackHandler.setBpm(newBpm)
def on_color(self, obj, newColor):
self.set_new_color(newColor)
def set_new_color(self, newColor):
self.newColor = newColor
if self.fade_time_in_beats > 0.0:
self.__set_color_step_sizes()
self.__playBackHandler.start()
else:
self.screen_color = newColor
def fade_step_callback(self, time):
if self.fade_time_in_beats < time:
self.screen_color = self.newColor
self.__playBackHandler.stopAndReset()
else:
self.__update_color_one_fade_step()
def set_value_from_slider(self, idx, new_color_value):
color_value = new_color_value / 255.0
if color_value > 1.0:
color_value = 1.0
self.color[idx] = color_value
def __calc_number_of_steps(self):
numberOfSteps = float(self.fade_time_in_beats) * self.__updatesPerBeat
return numberOfSteps
def __get_color_step_size(self, idx):
try:
color_diff = (self.newColor[idx] - self.screen_color[idx])
return float(color_diff) / float(self.__calc_number_of_steps())
except ZeroDivisionError:
return 0.0
def __set_color_step_sizes(self):
self.__color_step_size[self.IDX_RED] = self.__get_color_step_size(self.IDX_RED)
self.__color_step_size[self.IDX_GREEN] = self.__get_color_step_size(self.IDX_GREEN)
self.__color_step_size[self.IDX_BLUE] = self.__get_color_step_size(self.IDX_BLUE)
def __update_color_one_fade_step(self):
self.__update_color_step_helper(self.IDX_RED)
self.__update_color_step_helper(self.IDX_GREEN)
self.__update_color_step_helper(self.IDX_BLUE)
def __update_color_step_helper(self, idx):
self.screen_color[idx] += self.__color_step_size[idx]
