def force_move(self, from_value, to_value, interval):
"""Animate movement from one value to another in some interval.
This function will try to calculate the correct speed for the animation
to respect the interval.
"""
if from_value == to_value:
if self.state_change:
self.state_change(False)
return
# Note that we invert things here because other functions usually
# take the MOUSE GESTURE and move the other way around
dv = from_value - to_value
self.speed = dv / (interval * \
(1 - (0.5 * self.accel_constant * interval)))
self.accel = -(self.speed * self.accel_constant)
self.time = ecore.time_get()
self.cancel_click = True
self.forced_goal = abs(dv)
self.forced = True
if not self.animation:
if self.state_change:
self.state_change(True)
self.animation = ecore.animator_add(self._animation)
def pause_timer(self):
if self._timer is None:
return
self._stop_timer = int(ecore.time_get())
self._timer.stop()
self._timer_paused = True
def animate():
t = ecore.time_get()
progress = (t - self.time_start) / self.duration
if progress >= 1.0:
progress = 1.0
self.anim = None
self._exec(progress)
return progress < 1.0
def animate():
t = ecore.time_get()
progress = (t - self.time_start) / self.duration
if progress >= 1.0:
progress = 1.0
self.anim = None
self._exec(progress)
return progress < 1.0
def create_timer(self, time, func):
if self._timer is not None:
self._timer.delete()
self._start_timer = int(ecore.time_get())
self._total_time = time
self._timer_func = func
self._timer = ecore.timer_add(time, func)
return self._timer
def _animation(self):
"Calculates an offset to move and calls the move_offset."
t = ecore.time_get()
dt = t - self.time
ddv = (self.speed * dt) + (0.5 * self.accel * dt * dt)
dv = int(ddv)
if dt < ecore.animator_frametime_get() / 2.0:
return True
if self.forced:
if self.forced_goal == 0:
self.stop()
return False
if -1 < dv < 1:
dv = int(self.speed / abs(self.speed))
if self.forced_goal < abs(dv):
if dv < 0:
dv = -(self.forced_goal)
else:
dv = self.forced_goal
self.forced_goal = 0
else:
self.forced_goal -= abs(dv)
else: # not forced
if abs(ddv) < self.min_movement and \
abs(self.speed) < self.min_speed:
self.stop()
return False
self.speed = self.speed + (self.accel * dt)
self.time = t
moved = self.move_offset(dv)
# Stop animation if move_offset couldn't move anymore or if already
# crossed speed zero (stop) line.
if not moved or (self.speed * self.accel) > 0:
self.stop()
return False
return True
def mouse_down(self, value):
"""Feeds object with a mouse down event at value.
@return: False if the animation stopped, otherwise True.
"""
scrolling = True
self.cancel_kinetic = self.cancel_click = False
if self.animation:
self.animation.stop()
self.animation = None
scrolling = False
self.cancel_kinetic = self.cancel_click = True
self.first_value = self.base_value = value
self.time = ecore.time_get()
return scrolling
def __animate(self, start_time):
time = ecore.time_get() - start_time
if time > self.duration:
time = self.duration
last_run = True
else:
last_run = False
p_in = (time - self.t0_in) / self.duration_in
p_out = (time - self.t0_out) / self.duration_out
self.animate(time, p_in, p_out)
if time == self.duration or last_run:
self.tear_down()
if self.end_callback:
self.end_callback(self, self.container)
self.anim = None
return not last_run
def __animate(self, start_time):
time = ecore.time_get() - start_time
if time > self.duration:
time = self.duration
last_run = True
else:
last_run = False
p_in = (time - self.t0_in) / self.duration_in
p_out = (time - self.t0_out) / self.duration_out
self.animate(time, p_in, p_out)
if time == self.duration or last_run:
self.tear_down()
if self.end_callback:
self.end_callback(self, self.container)
self.anim = None
return not last_run
def mouse_up(self, value):
"""Feeds object with mouse up event at value.
@return: True if a click happened, False otherwise.
"""
# If it's just a small movement and click was not cancelled yet,
# this is a click.
delta_first = value - self.first_value
if abs(delta_first) < self.threshold and not self.cancel_click:
if self.state_change:
self.state_change(False)
self.cancel_click = False
return True
# A very slow drag cause the kinetic scroll to stop.
if self.cancel_kinetic:
if self.animation:
self.animation.stop()
self.animation = None
if self.state_change:
self.state_change(False)
return False
# Set the values and create the animation
t = ecore.time_get()
dt = t - self.time
dv = value - self.base_value
self.time = t
self.speed = dv / dt
self.accel = -(self.speed * self.accel_constant)
self.forced = False
if not self.animation:
if self.state_change:
self.state_change(True)
self.animation = ecore.animator_add(self._animation)
return False
def mouse_move(self, prev_value, value):
"Feeds object with mouse move event from prev_value to value."
# A very slow drag (identified by a small mouse_move event) will
# cause the kinetic scroll to be cancelled when the mouse goes up.
dv = value - prev_value
self.cancel_kinetic = (abs(dv) < self.drag_only_threshold)
self.move_offset(dv)
# If you drag over the threshold, it's a way to cancel a click
# before mouse goes up.
delta_first = value - self.first_value
if not self.cancel_click and abs(delta_first) > self.threshold:
if self.state_change:
self.state_change(True)
self.cancel_click = True
# If movement changed orientation, reset kinetic information.
delta_base = value - self.base_value
if dv * delta_base < 0:
self.base_value = prev_value
self.time = ecore.time_get()
def __init__(self, start, end, duration, callback, *args, **kargs):
"""Constructor.
@param start: initial value (or list/tuple of values).
@param end: final value (or list/tuple of values).
@param duration: in seconds.
@param callback: function to use at every animation tick.
Signature: C{function(value, *args, **kargs)}, value will be a tuple
if tuple were given as B{start} and B{end}.
"""
self.duration = duration
self.time_start = ecore.time_get()
if isinstance(start, (tuple, list)) and \
isinstance(end, (tuple, list)):
self.value_start = tuple(start)
self.value_range = tuple((e - s) for s, e in zip(start, end))
else:
self.value_start = start
self.value_range = end - start
self.func = callback
self.args = args
self.kargs = kargs
self.anim = None
self._run()
def __init__(self, start, end, duration, callback, *args, **kargs):
"""Constructor.
@param start: initial value (or list/tuple of values).
@param end: final value (or list/tuple of values).
@param duration: in seconds.
@param callback: function to use at every animation tick.
Signature: C{function(value, *args, **kargs)}, value will be a tuple
if tuple were given as B{start} and B{end}.
"""
self.duration = duration
self.time_start = ecore.time_get()
if isinstance(start, (tuple, list)) and \
isinstance(end, (tuple, list)):
self.value_start = tuple(start)
self.value_range = tuple((e - s) for s, e in zip(start, end))
else:
self.value_start = start
self.value_range = end - start
self.func = callback
self.args = args
self.kargs = kargs
self.anim = None
self._run()
def get_pos(center_x, center_y, w, h):
t = ecore.time_get()
t = (t % pi2) - math.pi # keep time between -pi and pi
x = center_x + w * math.cos(t)
y = center_y + h * math.sin(t)
return x, y
def get_pos(center_x, center_y, w, h):
t = ecore.time_get()
t = (t % pi2) - math.pi # keep time between -pi and pi
x = center_x + w * math.cos(t)
y = center_y + h * math.sin(t)
return x, y
def run(self, container, end_callback=None):
ContainerEffect.run(self, container, end_callback)
self.setup()
self.anim = ecore.animator_add(self.__animate, ecore.time_get())
def run(self, container, end_callback=None):
ContainerEffect.run(self, container, end_callback)
self.setup()
self.anim = ecore.animator_add(self.__animate, ecore.time_get())
