jsk_teleop_joy: status_history.py Source File

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00001 # status_history.py
00002 
00003 class StatusHistory():
00004   def __init__(self, max_length=10):
00005     self.max_length = max_length
00006     self.buffer = []
00007   def add(self, status):
00008     self.buffer.append(status)
00009     if len(self.buffer) > self.max_length:
00010       self.buffer = self.buffer[1:self.max_length+1]
00011   def all(self, proc):
00012     for status in self.buffer:
00013       if not proc(status):
00014         return False
00015     return True
00016   def latest(self):
00017     if len(self.buffer) > 0:
00018       return self.buffer[-1]
00019     else:
00020       return None
00021   def length(self):
00022     return len(self.buffer)
00023   def new(self, status, attr):
00024     if len(self.buffer) == 0:
00025       return getattr(status, attr)
00026     else:
00027       return getattr(status, attr) and not getattr(self.latest(), attr)