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keys.py
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from evdev import ecodes as e
import time
class Key:
def __init__(self, name, device, type, code, scan=None):
self.device = device
self.scan = scan
self.name = name
self.type = type
self.code = code
self.value = 0
def update(self, value):
if value == self.value:
return
self.value = value
if self.scan is not None:
self.device.write(e.EV_MSC, e.MSC_SCAN, self.scan)
self.device.write(self.type, self.code, self.value)
self.device.write(e.EV_SYN, e.SYN_REPORT, 0)
def press(self):
self.update(1)
def release(self):
self.update(0)
class DirectKey:
def __init__(self, name, device, type, code, scan=None):
self.device = device
self.scan = scan
self.name = name
self.type = type
self.code = code
def update(self, value):
if self.scan is not None:
if isinstance(self.scan, tuple):
self.device.write(*self.scan)
else:
self.device.write(e.EV_MSC, e.MSC_SCAN, self.scan)
self.device.write(self.type, self.code, value)
self.device.write(e.EV_SYN, e.SYN_REPORT, 0)
def press(self):
self.update(1)
def release(self):
self.update(0)
class WheelKey:
def __init__(self, name, device, type, code, code_high, size):
self.code_high = code_high
self.device = device
self.cumulative = 0
self.size = size
self.name = name
self.type = type
self.code = code
def update(self, value):
self.cumulative += value
if self.code_high is not None:
self.device.write(self.type, self.code_high, value)
while self.cumulative >= self.size:
if self.code is not None:
self.device.write(self.type, self.code, 1)
self.cumulative -= self.size
while self.cumulative <= 0:
if self.code is not None:
self.device.write(self.type, self.code, -1)
self.cumulative += self.size
self.device.write(e.EV_SYN, e.SYN_REPORT, 0)
class DelayedKey:
def __init__(self, name, callback, size):
self.upper_size = size / 2
self.lower_size = -size / 2
self.callback = callback
self.cumulative = 0
self.last_event = 0
self.max_delay = 1
self.size = size
self.name = name
def update(self, value):
current = time.time()
if current - self.last_event > self.max_delay:
self.cumulative = 0
self.cumulative += value
self.last_event = current
while self.cumulative >= self.upper_size:
self.cumulative -= self.upper_size
self.callback(True)
while self.cumulative <= self.lower_size:
self.cumulative -= self.lower_size
self.callback(False)
class LockableDelayedKey:
def __init__(self, name, callback_h, callback_v, size):
self.callback_h = callback_h
self.callback_v = callback_v
self.size = size
self.name = name
self.lock = None
self.cumulative_h = 0
self.cumulative_v = 0
def update_h(self, value):
if self.lock is not None and self.lock != "h":
return
energy = abs(value)
demand = abs(self.cumulative_v)
demand_left = max(0, demand - energy)
energy_left = energy - (demand - demand_left)
self.cumulative_v = demand_left if self.cumulative_v > 0 else -demand_left
value = energy_left if value > 0 else -energy_left
self.cumulative_h += value
upper_threshold = self.size / 4 if self.lock is None else self.size / 2
lower_threshold = -upper_threshold
while self.cumulative_h >= upper_threshold:
self.cumulative_h -= upper_threshold
self.callback_h(True)
self.lock = "h"
while self.cumulative_h <= lower_threshold:
self.cumulative_h -= lower_threshold
self.callback_h(False)
self.lock = "h"
def update_v(self, value):
if self.lock is not None and self.lock != "v":
return
energy = abs(value)
demand = abs(self.cumulative_h)
demand_left = max(0, demand - energy)
energy_left = energy - (demand - demand_left)
self.cumulative_h = demand_left if self.cumulative_h > 0 else -demand_left
value = energy_left if value > 0 else -energy_left
self.cumulative_v += value
upper_threshold = self.size / 4 if self.lock is None else self.size / 2
lower_threshold = -upper_threshold
while self.cumulative_v >= upper_threshold:
self.cumulative_v -= upper_threshold
self.callback_v(True)
self.lock = "v"
while self.cumulative_v <= lower_threshold:
self.cumulative_v -= lower_threshold
self.callback_v(False)
self.lock = "v"
def unlock(self):
self.cumulative_v = 0
self.cumulative_h = 0
self.lock = None