def __init__(self, model_strand, virtual_helix_item, viewroot):
"""The parent should be a VirtualHelixItem."""
super(StrandItem, self).__init__(virtual_helix_item)
self._model_strand = model_strand
self._virtual_helix_item = virtual_helix_item
self._viewroot = viewroot
self._getActiveTool = virtual_helix_item._getActiveTool
self._controller = StrandItemController(self, model_strand)
is_drawn_5to3 = model_strand.strandSet().isDrawn5to3()
self._strand_filter = model_strand.strandFilter()
self._insertion_items = {}
# caps
self._low_cap = EndpointItem(self, 'low', is_drawn_5to3)
self._high_cap = EndpointItem(self, 'high', is_drawn_5to3)
# self._high_cap = None
self._dual_cap = EndpointItem(self, 'dual', is_drawn_5to3)
# orientation
self._is_drawn_5to3 = is_drawn_5to3
# self._isOnTop = virtual_helix_item.isStrandOnTop(model_strand)
# label
self._seq_label = QGraphicsSimpleTextItem(self)
self.refreshInsertionItems(model_strand)
if not getBatch():
self._updateSequenceText()
# create a larger click area rect to capture mouse events
self._click_area = c_a = QGraphicsRectItem(_DEFAULT_RECT, self)
c_a.mousePressEvent = self.mousePressEvent
c_a.setPen(_NO_PEN)
self.setAcceptHoverEvents(True)
c_a.setAcceptHoverEvents(True)
c_a.hoverMoveEvent = self.hoverMoveEvent
self.setZValue(styles.ZSTRANDITEM)
# xover comming from the 3p end
self._xover3pEnd = XoverItem(self, virtual_helix_item)
if not getBatch():
# initial refresh
self._updateColor(model_strand)
self._updateAppearance(model_strand)
self.setZValue(styles.ZSTRANDITEM)
self.setFlag(QGraphicsItem.ItemIsSelectable)
