timeline_renderer.py
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00032 
00033 from python_qt_binding.QtCore import QObject
00034 
00035 
00036 class TimelineRenderer(QObject):
00037     """
00038     A custom renderer for interval of time of a topic on the timeline.
00039 
00040     @param msg_combine_px: don't draw discrete messages if they're less than this many pixels separated [default: 1.5]
00041     @type  msg_combine_px: float
00042     """
00043     def __init__(self, timeline, msg_combine_px=1.5):
00044         super(TimelineRenderer, self).__init__()
00045         self.timeline = timeline
00046         self.msg_combine_px = msg_combine_px
00047 
00048     def get_segment_height(self, topic):
00049         """
00050         Get the height of the topic segment on the timeline.
00051 
00052         @param topic: topic name to draw
00053         @type  topic: str
00054         @return: height in pixels of the topic segment. If none, the timeline default is used.
00055         @rtype:  int or None
00056         """
00057         return None
00058 
00059     def draw_timeline_segment(self, painter, topic, stamp_start, stamp_end, x, y, width, height):
00060         """
00061         Draw the timeline segment.
00062 
00063         @param painter: QPainter context to render into
00064         @param topic: topic name
00065         @param stamp_start: start of the interval on the timeline
00066         @param stamp_end: start of the interval on the timeline
00067         @param x: x coordinate of the timeline interval
00068         @param y: y coordinate of the timeline interval
00069         @param width: width in pixels of the timeline interval
00070         @param height: height in pixels of the timeline interval
00071         @return: whether the interval was renderered
00072         @rtype:  bool
00073         """
00074         return False
00075 
00076     def close(self):
00077         """
00078         Close the renderer, releasing any resources.
00079         """
00080         pass


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