rqt_bag: topic_message_view.py Source File

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00032 from .message_view import MessageView
00033 
00034 from python_qt_binding.QtGui import QAction, QIcon, QToolBar
00035 
00036 
00037 class TopicMessageView(MessageView):
00038     """
00039     A message view with a toolbar for navigating messages in a single topic.
00040     """
00041     def __init__(self, timeline, parent, topic):
00042         MessageView.__init__(self, timeline, topic)
00043 
00044         self._parent = parent
00045         self._stamp = None
00046         self._name = parent.objectName()
00047 
00048         self.toolbar = QToolBar()
00049         self._first_action = QAction(QIcon.fromTheme('go-first'), '', self.toolbar)
00050         self._first_action.triggered.connect(self.navigate_first)
00051         self.toolbar.addAction(self._first_action)
00052         self._prev_action = QAction(QIcon.fromTheme('go-previous'), '', self.toolbar)
00053         self._prev_action.triggered.connect(self.navigate_previous)
00054         self.toolbar.addAction(self._prev_action)
00055         self._next_action = QAction(QIcon.fromTheme('go-next'), '', self.toolbar)
00056         self._next_action.triggered.connect(self.navigate_next)
00057         self.toolbar.addAction(self._next_action)
00058         self._last_action = QAction(QIcon.fromTheme('go-last'), '', self.toolbar)
00059         self._last_action.triggered.connect(self.navigate_last)
00060         self.toolbar.addAction(self._last_action)
00061         parent.layout().addWidget(self.toolbar)
00062 
00063     @property
00064     def parent(self):
00065         return self._parent
00066 
00067     @property
00068     def stamp(self):
00069         return self._stamp
00070 
00071     # MessageView implementation
00072 
00073     def message_viewed(self, bag, msg_details):
00074         _, _, self._stamp = msg_details[:3]
00075 
00076     # Events
00077     def navigate_first(self):
00078         for entry in self.timeline.get_entries([self.topic], *self.timeline._timeline_frame.play_region):
00079             self.timeline._timeline_frame.playhead = entry.time
00080             break
00081 
00082     def navigate_previous(self):
00083         last_entry = None
00084         for entry in self.timeline.get_entries([self.topic], self.timeline._timeline_frame.start_stamp, self.timeline._timeline_frame.playhead):
00085             if entry.time < self.timeline._timeline_frame.playhead:
00086                 last_entry = entry
00087 
00088         if last_entry:
00089             self.timeline._timeline_frame.playhead = last_entry.time
00090 
00091     def navigate_next(self):
00092         for entry in self.timeline.get_entries([self.topic], self.timeline._timeline_frame.playhead, self.timeline._timeline_frame.end_stamp):
00093             if entry.time > self.timeline._timeline_frame.playhead:
00094                 self.timeline._timeline_frame.playhead = entry.time
00095                 break
00096 
00097     def navigate_last(self):
00098         last_entry = None
00099         for entry in self.timeline.get_entries([self.topic], *self.timeline._timeline_frame.play_region):
00100             last_entry = entry
00101 
00102         if last_entry:
00103             self.timeline._timeline_frame.playhead = last_entry.time