message_view.py
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00001 # Software License Agreement (BSD License)
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00003 # Copyright (c) 2012, Willow Garage, Inc.
00004 # All rights reserved.
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00006 # Redistribution and use in source and binary forms, with or without
00007 # modification, are permitted provided that the following conditions
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00010 #  * Redistributions of source code must retain the above copyright
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00013 #    copyright notice, this list of conditions and the following
00014 #    disclaimer in the documentation and/or other materials provided
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00031 # POSSIBILITY OF SUCH DAMAGE.
00032 
00033 
00034 from python_qt_binding.QtCore import QObject
00035 
00036 
00037 class MessageView(QObject):
00038     """
00039     A message details renderer. When registered with rqt_bag, a MessageView is called
00040     whenever the timeline playhead moves.
00041     """
00042     name = 'Untitled'
00043 
00044     def __init__(self, timeline, topic):
00045         super(MessageView, self).__init__()
00046         self.timeline = timeline
00047         self.topic = topic
00048 
00049     def message_viewed(self, bag, msg_details):
00050         """
00051         View the message.
00052 
00053         @param bag: the bag file the message is contained in
00054         @type  bag: rosbag.Bag
00055         @param msg_details: the details of the message to be viewed
00056         @type msg_details: tuple (topic, msg, time)
00057             @param topic: the message topic
00058             @type  topic: str
00059             @param msg: the message
00060             @param t: the message timestamp
00061             @type  t: rospy.Time
00062         """
00063         pass
00064 
00065     def message_cleared(self):
00066         """
00067         Clear the currently viewed message (if any).
00068         """
00069         pass
00070 
00071     def timeline_changed(self):
00072         """
00073         Called when the messages in a timeline change, e.g. if a new message is recorded, or
00074         a bag file is added
00075         """
00076         pass
00077 
00078     def close(self):
00079         """
00080         Close the message view, releasing any resources.
00081         """
00082         pass
00083 
00084 # NOTE: event function should not be changed in subclasses
00085     def event(self, event):
00086         """
00087         This function will be called to process events posted by post_event
00088         it will call message_cleared or message_viewed with the relevant data
00089         """
00090         bag, msg_data = event.data
00091         if msg_data:
00092             self.message_viewed(bag, msg_data)
00093         else:
00094             self.message_cleared()
00095         return True


rqt_bag
Author(s): Aaron Blasdel, Tim Field
autogenerated on Thu Aug 17 2017 02:19:27