def _draw_position(self, position):
# Draw the position of the slider.
# The position parameter is a float between 0 and 1 (0= off, 1= on).
# apply the "easing" function to the requested position to adjust motion
position = easing(position)
# Get the position offset from the motion function
x_offset, y_offset, _ = self._get_offset_position(
position) # ignore angle_offset
# Update the switch and text x- and y-positions
self._switch_circle.x = self._switch_initial_x + x_offset
self._switch_circle.y = self._switch_initial_y + y_offset
self._text_0.x = self._text_0_initial_x + x_offset
self._text_0.y = self._text_0_initial_y + y_offset
self._text_1.x = self._text_1_initial_x + x_offset
self._text_1.y = self._text_1_initial_y + y_offset
# Set the color to the correct fade
self._switch_circle.fill = _color_fade(self._fill_color_off,
self._fill_color_on, position)
self._switch_circle.outline = _color_fade(self._outline_color_off,
self._outline_color_on,
position)
self._switch_roundrect.fill = _color_fade(self._background_color_off,
self._background_color_on,
position)
self._switch_roundrect.outline = _color_fade(
self._background_outline_color_off,
self._background_outline_color_on,
position,
)
self._text_0.fill = self._switch_circle.fill
self._text_1.fill = self._switch_circle.fill
self._text_0.outline = self._switch_circle.outline
self._text_1.outline = self._switch_circle.outline
if self._display_button_text and position >= 0.5:
self._text_0.hidden = True
self._text_1.hidden = False
elif self._display_button_text and position < 0.5:
self._text_0.hidden = False
self._text_1.hidden = True
def _animate_switch(self):
# The animation function for the switch.
# 1. Move the switch
# 2. Update the self._value to the opposite of its current value.
#
# Depending upon your widget's animation requirements,
# you can change this function to control the acceleration
# and motion of your element.
#
# Key animation feature:
# - Uses the timer to control the speed of the motion. This ensure
# that the movement speed will be the same on different boards.
#
start_time = time.monotonic() # set the starting time for animation
while True:
# Determines the direction of movement, depending upon if the
# switch is going from on->off or off->on
# constrain the elapsed time
elapsed_time = time.monotonic() - start_time
if elapsed_time > self._animation_time:
elapsed_time = self._animation_time
if self._value:
position = (1 - (elapsed_time) / self._animation_time
) # fraction from 0 to 1
else:
position = (elapsed_time
) / self._animation_time # fraction from 0 to 1
# Update the moving elements based on the current position
# apply the "easing" function to the requested position to adjust motion
self._draw_position(easing(position)) # update the switch position
# update the switch value once the motion is complete
if (position >= 1) and not self._value:
self._value = True
break
if (position <= 0
) and self._value: # ensures that the final position is drawn
self._value = False
break