Handle segments with null feed rate

CURA-12213

plugins/SimulationView/SimulationView.py

@@ -256,9 +256,19 @@ def cumulativeLineDuration(self) -> List[float]:
  polylines = self.getLayerData()
  if polylines is not None:
  for polyline in polylines.polygons:
- for line_duration in list((polyline.lineLengths / polyline.lineFeedrates)[0]):
+ for line_index in range(len(polyline.lineLengths)):
+ line_length = polyline.lineLengths[line_index]
+ line_feedrate = polyline.lineFeedrates[line_index][0]
+
+ if line_feedrate > 0.0:
+ line_duration = line_length / line_feedrate
+ else:
+ # Something is wrong with this line, set an arbitrary non-null duration
+ line_duration = 0.1
+
  total_duration += line_duration / SimulationView.SIMULATION_FACTOR
  self._cumulative_line_duration.append(total_duration)
+
  # for tool change we add an extra tool path
  self._cumulative_line_duration.append(total_duration)
  # set current cached layer
@@ -583,7 +593,7 @@ def calculateColorSchemeLimits(self) -> None:
  self._max_thickness = sys.float_info.min
  self._min_flow_rate = sys.float_info.max
  self._max_flow_rate = sys.float_info.min
- self._cumulative_line_duration = {}
+ self._cumulative_line_duration = []
 
  # The colour scheme is only influenced by the visible lines, so filter the lines by if they should be visible.
  visible_line_types = []