def onAnnotationSuggested(self, anno_type, strokelist):
"""Called when the a list of strokes are suggested to yield an annotation of type anno_type."""
#First pass, assume we were just too strict with the distance/size thresholds
knownHeads = []
knownTails = []
for tip, stk in self._arrowHeads:
if stk in strokelist:
knownHeads.append( (tip, stk) )
for ep, tail_stk in self._endpoints:
if tail_stk in strokelist:
for tip, head_stk in knownHeads:
if head_stk == tail_stk:
continue
headEnds = ( head_stk.Points[0], head_stk.Points[-1] )
if GeomUtils.pointInAngleCone(ep, headEnds[0], tip, headEnds[1]):
anno = ArrowAnnotation( tip, ep, headstroke= head_stk, tailstroke = tail_stk )
self.getBoard().AnnotateStrokes([head_stk, tail_stk],anno)
logger.debug("Suggestion Response: Matched arrow with looser constraints")
return
#Second pass, we missed the arrowhead to begin with
logger.warn("Not able to generate Arrow!")
return
def _isPointWithHead(point, head, tip):
"Returns true if point is close enough and within the cone of the head stroke"
distanceThresh = 1
distanceThresh *= distanceThresh #Keep up with squared distances
ep1 = head.Points[0]
ep2 = head.Points[-1]
# * tip
# o o
# o o
# o o
# o (x) o
# midpoint
#
# * endpoint
# o
# o
# o
# (etc)
midpoint = Point((ep1.X + ep2.X)/2, (ep1.Y + ep2.Y)/2) #Mid-way between the two endpoints of the arrowhead
tip_to_endpoint = GeomUtils.pointDistanceSquared(point.X, point.Y, tip.X, tip.Y)
tip_to_backofarrowhead = GeomUtils.pointDistanceSquared(tip.X, tip.Y, midpoint.X, midpoint.Y)
endpoint_to_backofarrowhead = GeomUtils.pointDistanceSquared(point.X, point.Y, midpoint.X, midpoint.Y)
#logger.debug("tip_to_endpoint: %s\n, tip_to_backofarrowhead: %s,\n endpoint_to_backofarrowhead: %s" % (tip_to_endpoint, tip_to_backofarrowhead, endpoint_to_backofarrowhead))
#Tail's endpoint is close to the end of the arrowhead, or even closer to the tip of the arrowhead
if tip_to_backofarrowhead >= endpoint_to_backofarrowhead or tip_to_backofarrowhead >= tip_to_endpoint:
if GeomUtils.pointInAngleCone(point, ep1, tip, ep2):
return True
return False
def _isPointWithHead(point, head, tip):
"Returns true if point is close enough and within the cone of the head stroke"
ep1 = head.Points[0]
ep2 = head.Points[-1]
midpoint = Point((ep1.X + ep2.X)/2, (ep1.Y + ep2.Y)/2)
tip_to_endpoint = GeomUtils.pointDistanceSquared(point.X, point.Y, tip.X, tip.Y)
tip_to_backofarrowhead = GeomUtils.pointDistanceSquared(tip.X, tip.Y, midpoint.X, midpoint.Y)
if tip_to_endpoint < tip_to_backofarrowhead:
if GeomUtils.pointInAngleCone(point, ep1, tip, ep2):
return True
return False
def _isPointWithHead(tailpoints, head, tip):
"Returns true if point is close enough and within the cone of the head stroke"
distanceThresh = 1
distanceThresh *= distanceThresh #Keep up with squared distances
point = tailpoints[0]
ep1 = head.Points[0]
ep2 = head.Points[-1]
# * tip
# o o
# o o
# o o
# o (x) o
# midpoint
#
# * endpoint
# o
# o
# o
# (etc)
midpoint = Point((ep1.X + ep2.X)/2, (ep1.Y + ep2.Y)/2) #Mid-way between the two endpoints of the arrowhead
tip_to_endpoint = GeomUtils.pointDistanceSquared(point.X, point.Y, tip.X, tip.Y)
tip_to_backofarrowhead = GeomUtils.pointDistanceSquared(tip.X, tip.Y, midpoint.X, midpoint.Y)
endpoint_to_backofarrowhead = GeomUtils.pointDistanceSquared(point.X, point.Y, midpoint.X, midpoint.Y)
#fuzz = math.sqrt(tip_to_backofarrowhead) #Number of pixels to fuzz the "in-angle-cone" test
#logger.debug("tip_to_endpoint: %s\n, tip_to_backofarrowhead: %s,\n endpoint_to_backofarrowhead: %s" % (tip_to_endpoint, tip_to_backofarrowhead, endpoint_to_backofarrowhead))
#Tail's endpoint is close to the end of the arrowhead, or even closer to the tip of the arrowhead
if tip_to_backofarrowhead >= endpoint_to_backofarrowhead or tip_to_backofarrowhead >= tip_to_endpoint:
logger.debug("Distance from head-tip to tail-endpoint is good!")
#Check the in-angle cone progressively down the tail
epList = tailpoints[: len(tailpoints) / 3]
for pt in epList:
if GeomUtils.pointInAngleCone(pt, ep1, tip, ep2):
logger.debug("Endpoint inside angle cone")
return True
return False