Python QGraphicsSimpleTextItem.setPos方法代码示例

# 需要导入模块: from PyQt4.QtGui import QGraphicsSimpleTextItem [as 别名]
# 或者: from PyQt4.QtGui.QGraphicsSimpleTextItem import setPos [as 别名]
 def showMoveHelper(self, visible=True):
     """show help text In empty HandBoards"""
     if visible:
         if not self.__moveHelper:
             splitter = QGraphicsRectItem(self)
             hbCenter = self.rect().center()
             splitter.setRect(hbCenter.x() * 0.5, hbCenter.y(), hbCenter.x() * 1, 1)
             helpItems = [splitter]
             for name, yFactor in [(m18n('Move Exposed Tiles Here'), 0.5),
                                     (m18n('Move Concealed Tiles Here'), 1.5)]:
                 helper = QGraphicsSimpleTextItem(name, self)
                 helper.setScale(3)
                 nameRect = QRectF()
                 nameRect.setSize(helper.mapToParent(helper.boundingRect()).boundingRect().size())
                 center = QPointF(hbCenter)
                 center.setY(center.y() * yFactor)
                 helper.setPos(center - nameRect.center())
                 if self.sceneRotation() == 180:
                     rotateCenter(helper, 180)
                 helpItems.append(helper)
             self.__moveHelper = self.scene().createItemGroup(helpItems)
         self.__moveHelper.setVisible(True)
     else:
         if self.__moveHelper:
             self.__moveHelper.setVisible(False)

# 需要导入模块: from PyQt4.QtGui import QGraphicsSimpleTextItem [as 别名]
# 或者: from PyQt4.QtGui.QGraphicsSimpleTextItem import setPos [as 别名]
 def update_items(self):
     #self.item = QGraphicsRectItem(0,0,self._total_w, self.row_h)
     seq_width = 0
     nopen = QPen(QtCore.Qt.NoPen)
     font = QFont("Courier", self.fsize)
     rect_cls = self.InteractiveLetterItem if self.interact else QGraphicsRectItem
     for i, letter in enumerate(self.seq):
         width = self.col_w
         for m in self.special_col:
             if m[0] < i <= m[1]:
                 width = self.alt_col_w
                 break
         #load interactive item if called correspondingly
         rectItem = rect_cls(0, 0, width, self.row_h, parent=self.item)
         rectItem.setX(seq_width) # to give correct X to children item
         rectItem.setBrush(self.bg_col[letter])
         rectItem.setPen(nopen)
         if self.interact:
             if self.codon:
                 rectItem.codon = '%s, %d: %s' % (self.seq[i], i,
                                                  self.codon[i*3:i*3+3])
             else:
                 rectItem.codon = '%s, %d' % (self.seq[i], i)
         # write letter if enough space
         if width >= self.fsize:
             text = QGraphicsSimpleTextItem(letter, parent=rectItem)
             text.setFont(font)
             text.setBrush(self.fg_col[letter])
             # Center text according to rectItem size
             tw = text.boundingRect().width()
             th = text.boundingRect().height()
             text.setPos((width - tw)/2, (self.row_h - th)/2)
         seq_width += width
     self.width = seq_width

# 需要导入模块: from PyQt4.QtGui import QGraphicsSimpleTextItem [as 别名]
# 或者: from PyQt4.QtGui.QGraphicsSimpleTextItem import setPos [as 别名]
def iLabel(node, *args, **kargs):

	#code for making specialized faces for intermediates mostly cribbed from the ete2 website example (though not interactive):
	# http://pythonhosted.org/ete2/tutorial/tutorial_drawing.html#creating-your-custom-interactive-item-faces

	my_label = node.name

	ellipse = QGraphicsEllipseItem(0,0,fontSize*2,fontSize*2) #I think the first two are coords of center; second pair is major/minor axis
	ellipse.setPen(QPen(QColor( 'black' )))
	ellipse.setBrush(QBrush(QColor( 'white' )))

	text = QGraphicsSimpleTextItem(my_label)
	text.setParentItem(ellipse)
	text.setBrush(QBrush(QColor("black")))
	font = QFont("Arial",fontSize*.9,weight=80)
	font.setLetterSpacing(1, 2) #add 2 pixels between letters for legibility
	text.setFont(font)

	#Center text according to masterItem size
	tw = text.boundingRect().width()
	th = text.boundingRect().height()
	center = ellipse.boundingRect().center()
	text.setPos(center.x()+1-tw/2, center.y()-th/2) #since the last letter has an extra 2 pixels after it from the spacing command, adjust center to compensate
    
	return ellipse

# 需要导入模块: from PyQt4.QtGui import QGraphicsSimpleTextItem [as 别名]
# 或者: from PyQt4.QtGui.QGraphicsSimpleTextItem import setPos [as 别名]
 def draw_y_axis(self):
     lineItem = QGraphicsLineItem(0, self.coordY(self.ylim[0]),
                                  0, self.coordY(self.ylim[1]),
                                  parent=self.item)
     lineItem.setPen(QPen(QColor('black')))
     lineItem.setZValue(10)
     max_w = 0
     for y in set(self.hlines + list(self.ylim)):
         lineItem = QGraphicsLineItem(0, self.coordY(y),
                                            -5, self.coordY(y),
                                            parent=self.item)
         lineItem.setPen(QPen(QColor('black')))
         lineItem.setZValue(10)
         text = QGraphicsSimpleTextItem(str(y))
         text.setFont(QFont("Arial", self.fsize-2))
         text.setParentItem(self.item)
         tw = text.boundingRect().width()
         max_w = tw if tw > max_w else max_w
         th = text.boundingRect().height()
         # Center text according to masterItem size
         text.setPos(-tw - 5, self.coordY(y)-th/2)
     if self.ylabel:
         text = QGraphicsSimpleTextItem(self.ylabel)
         text.setFont(QFont("Arial", self.fsize-1))
         text.setParentItem(self.item)
         text.rotate(-90)
         tw = text.boundingRect().width()
         th = text.boundingRect().height()
         # Center text according to masterItem size
         text.setPos(-th -5-max_w, tw/2+self.coordY(sum(self.ylim)/2))

# 需要导入模块: from PyQt4.QtGui import QGraphicsSimpleTextItem [as 别名]
# 或者: from PyQt4.QtGui.QGraphicsSimpleTextItem import setPos [as 别名]
    def draw_x_axis(self):
        #lineItem = QGraphicsLineItem(self.col_w/2,
        #                                   self.coordY(self.ylim[0])+2,
        #                                   self.width-self.col_w/2,
        #                                   self.coordY(self.ylim[0])+2,
        #                                   parent=self.item)
        #lineItem.setPen(QPen(QColor('black')))
        #lineItem.setZValue(10)
        #all_vals = list(range(0, len(self.values), 5))
        #if (len(self.values)-1)%5:
        #    all_vals += [len(self.values)-1]
        for x, lab in enumerate(self.values):
#            lineItem = QGraphicsLineItem(0, self.coordY(self.ylim[0])+2,
#                                               0, self.coordY(self.ylim[0])+6,
#                                               parent=self.item)
#            lineItem.setX(x*self.col_w + self.col_w/2)
#            lineItem.setPen(QPen(QColor('black')))
#            lineItem.setZValue(10)
            text = QGraphicsSimpleTextItem(str(lab))
            text.rotate(-90)
            text.setFont(QFont("Arial", self.fsize-2))
            text.setParentItem(self.item)
            tw = text.boundingRect().height()
            # Center text according to masterItem size
            text.setPos(x*self.col_w-tw/2 + self.col_w/2,
                        self.coordY(self.ylim[0]))

# 需要导入模块: from PyQt4.QtGui import QGraphicsSimpleTextItem [as 别名]
# 或者: from PyQt4.QtGui.QGraphicsSimpleTextItem import setPos [as 别名]
    def update_items(self):
        rect_cls = QGraphicsRectItem
        self.item = rect_cls(0, 0, self.width, self.row_h)
        seq_width = 0
        nopen = QPen(Qt.NoPen)
        font = QFont("Courier", self.fsize)
        for i, letter in enumerate(self.seq):
            width = self.col_w
            for reg in self.special_col:
                if reg[0] < i <= reg[1]:
                    width = self.alt_col_w
                    break
            rectitem = rect_cls(0, 0, width, self.row_h, parent=self.item)
            rectitem.setX(seq_width)  # to give correct X to children item
            rectitem.setBrush(self.bg_col[letter])
            rectitem.setPen(nopen)

            # write letter if enough space
            if width >= self.fsize:
                text = QGraphicsSimpleTextItem(letter, parent=rectitem)
                text.setFont(font)
                text.setBrush(self.fg_col[letter])
                # Center text according to rectitem size
                txtw = text.boundingRect().width()
                txth = text.boundingRect().height()
                text.setPos((width - txtw) / 2, (self.row_h - txth) / 2)
            seq_width += width
        self.width = seq_width

# 需要导入模块: from PyQt4.QtGui import QGraphicsSimpleTextItem [as 别名]
# 或者: from PyQt4.QtGui.QGraphicsSimpleTextItem import setPos [as 别名]
 def setPageHead(self, len):
     count = 0
     x = 95
     while count < len:
         item = QGraphicsSimpleTextItem()
         item.setFont(self.font)
         item.setText("%.2x" % count)
         item.setPos(x, 3)
         self.scene.addItem(item)
         x += self.pagew + 2
         count += 1

# 需要导入模块: from PyQt4.QtGui import QGraphicsSimpleTextItem [as 别名]
# 或者: from PyQt4.QtGui.QGraphicsSimpleTextItem import setPos [as 别名]
 def add_text(self):
     if (self.labels):
         center = self.item.boundingRect().center()
         text = QGraphicsSimpleTextItem(str(self.labels))
         text.setFont(QFont("Arial", self.label_size))
         text.setParentItem(self.item)
         text.setBrush(QBrush(QColor('#ddd')))
         tw = text.boundingRect().width() / 2.
         th = text.boundingRect().height() / 2.
         x = -tw + center.x()
         y = -th + center.y()
         # Center text according to masterItem size
         text.setPos(x, y)

# 需要导入模块: from PyQt4.QtGui import QGraphicsSimpleTextItem [as 别名]
# 或者: from PyQt4.QtGui.QGraphicsSimpleTextItem import setPos [as 别名]
def ugly_name_face(node, *args, **kargs):
    """ This is my item generator. It must receive a node object, and
    returns a Qt4 graphics item that can be used as a node face.
    """

    # receive an arbitrary number of arguments, in this case width and
    # height of the faces
    width = args[0][0]
    height = args[0][1]

    ## Creates a main master Item that will contain all other elements
    ## Items can be standard QGraphicsItem
    # masterItem = QGraphicsRectItem(0, 0, width, height)
    
    # Or your custom Items, in which you can re-implement interactive
    # functions, etc. Check QGraphicsItem doc for details.
    masterItem = InteractiveItem(0, 0, width, height)

    # Keep a link within the item to access node info 
    masterItem.node = node 

    # I dont want a border around the masterItem
    masterItem.setPen(QPen(QtCore.Qt.NoPen))

    # Add ellipse around text
    ellipse = QGraphicsEllipseItem(masterItem.rect())
    ellipse.setParentItem(masterItem)
    # Change ellipse color
    ellipse.setBrush(QBrush(QColor( random_color())))

    # Add node name within the ellipse
    text = QGraphicsSimpleTextItem(node.name)
    text.setParentItem(ellipse)
    text.setPen(QPen(QPen(QColor("white"))))

    # Center text according to masterItem size
    tw = text.boundingRect().width()
    th = text.boundingRect().height()
    center = masterItem.boundingRect().center()
    text.setPos(center.x()-tw/2, center.y()-th/2)
    
    return masterItem

# 需要导入模块: from PyQt4.QtGui import QGraphicsSimpleTextItem [as 别名]
# 或者: from PyQt4.QtGui.QGraphicsSimpleTextItem import setPos [as 别名]
def iLabel(node, *args, **kargs):

	#code for making specialized faces for intermediates mostly cribbed from the ete2 website example (though not interactive):
	# http://pythonhosted.org/ete2/tutorial/tutorial_drawing.html#creating-your-custom-interactive-item-faces

	my_label = args[0][0] #or maybe just node.name?

	ellipse = QGraphicsEllipseItem(0,0,fontSize*2,fontSize*2) #I think the first two are coords of center; second pair is major/minor axis
	ellipse.setBrush(QBrush(QColor( 'black' )))

	text = QGraphicsSimpleTextItem(my_label)
	text.setParentItem(ellipse)
	text.setBrush(QBrush(QColor("white")))
	text.setFont(QFont("Arial",fontSize*.75))

	#Center text according to masterItem size
	tw = text.boundingRect().width()
	th = text.boundingRect().height()
	center = ellipse.boundingRect().center()
	text.setPos(center.x()-tw/2, center.y()-th/2)
    
	return ellipse

# 需要导入模块: from PyQt4.QtGui import QGraphicsSimpleTextItem [as 别名]
# 或者: from PyQt4.QtGui.QGraphicsSimpleTextItem import setPos [as 别名]
class PathHelixHandle(QGraphicsItem):
    """docstring for PathHelixHandle"""
    radius = styles.PATHHELIXHANDLE_RADIUS
    rect = QRectF(0, 0, 2*radius, 2*radius)
    defBrush = QBrush(styles.grayfill)
    defPen = QPen(styles.graystroke, styles.PATHHELIXHANDLE_STROKE_WIDTH)
    hovBrush = QBrush(styles.bluefill)
    hovPen = QPen(styles.bluestroke, styles.PATHHELIXHANDLE_STROKE_WIDTH)
    useBrush = QBrush(styles.orangefill)
    usePen = QPen(styles.orangestroke, styles.PATHHELIXHANDLE_STROKE_WIDTH)

    def __init__(self, vhelix, parent):
        super(PathHelixHandle, self).__init__(parent)
        self.vhelix = vhelix
        
        self.parent = parent
        self.restoreParentItem = parent
        self.setParentItem(parent)
        
        self._number = self.vhelix.number()
        self.label = None
        self.focusRing = None
        self.beingHoveredOver = False
        self.setAcceptsHoverEvents(True)
        self.font = QFont("Times", 30, QFont.Bold)
        self.setNumber()
        #self.setFlag(QGraphicsItem.ItemIsMovable)
        self.setFlag(QGraphicsItem.ItemIsSelectable)
        self.setFlag(QGraphicsItem.ItemSendsScenePositionChanges)
    # end def

    def boundingRect(self):
        return self.rect

    def paint(self, painter, option, widget=None):
        if self._number >= 0:
            if self.isSelected():
                painter.setBrush(self.hovBrush)
                painter.setPen(self.hovPen)
            else:
                painter.setBrush(self.useBrush)
                painter.setPen(self.usePen)
        else:
            painter.setBrush(self.defBrush)
            painter.setPen(self.defPen)
        if self.beingHoveredOver:
            painter.setPen(self.hovPen)
        painter.drawEllipse(self.rect)

    def setNumber(self):
        """docstring for setNumber"""
        if self.label == None:
            self.label = QGraphicsSimpleTextItem("%d" % self._number)
            self.label.setFont(self.font)
            self.label.setParentItem(self)
        y_val = self.radius / 3
        if self._number < 10:
            self.label.setPos(self.radius / 1.5, y_val)
        elif self._number < 100:
            self.label.setPos(self.radius / 3, y_val)
        else: # _number >= 100
            self.label.setPos(0, y_val)

    def number(self):
        """docstring for number"""
        return self._number

    class FocusRingPainter(QGraphicsItem):
        """Draws a focus ring around helix in parent"""
        def __init__(self, helix, scene, parent=None):
            super(PathHelixHandle.FocusRingPainter, self).__init__(parent)
            self.parent = parent
            self.scene = scene
            self.helix = helix
            self.setPos(helix.pos())

        def paint(self, painter, option, widget=None):
            painter.setPen(PathHelixHandle.hovPen)
            painter.drawEllipse(self.helix.rect)

        def boundingRect(self):
            return self.helix.rect
    # end class

    def hoverEnterEvent(self, event):
        """
        hoverEnterEvent changes the PathHelixHandle brush and pen from default
        to the hover colors if necessary.
        """
        if self.focusRing == None:
            self.focusRing = PathHelixHandle.FocusRingPainter(self,\
                                                         self.scene(),\
                                                         self.parentItem())
        self.update(self.rect)
    # end def

    def hoverLeaveEvent(self, event):
        """
        hoverEnterEvent changes the PathHelixHanle brush and pen from hover
        to the default colors if necessary.
#.........这里部分代码省略.........

# 需要导入模块: from PyQt4.QtGui import QGraphicsSimpleTextItem [as 别名]
# 或者: from PyQt4.QtGui.QGraphicsSimpleTextItem import setPos [as 别名]
 def write_header(self):
     text = QGraphicsSimpleTextItem(self.header)
     text.setFont(QFont("Arial", self.fsize))
     text.setParentItem(self.item)
     text.setPos(0, 5)

# 需要导入模块: from PyQt4.QtGui import QGraphicsSimpleTextItem [as 别名]
# 或者: from PyQt4.QtGui.QGraphicsSimpleTextItem import setPos [as 别名]
class PreCrossoverHandle(QGraphicsItem):
    scafpen = QPen(styles.pch_scaf_stroke, styles.PATH_STRAND_STROKE_WIDTH)
    scafpen.setCapStyle(Qt.FlatCap)  # or Qt.RoundCap
    scafpen.setJoinStyle(Qt.RoundJoin)
    stappen = QPen(styles.pch_stap_stroke, styles.PATH_STRAND_STROKE_WIDTH)
    stappen.setCapStyle(Qt.FlatCap)  # or Qt.RoundCap
    stappen.setJoinStyle(Qt.RoundJoin)
    disabpen = QPen(styles.pch_disab_stroke, styles.PATH_STRAND_STROKE_WIDTH)
    disabpen.setCapStyle(Qt.FlatCap)
    disabpen.setJoinStyle(Qt.RoundJoin)
    disabbrush = QBrush(styles.pch_disab_stroke)  # For the helix number label
    enabbrush = QBrush(Qt.SolidPattern)  # Also for the helix number label
    baseWidth = styles.PATH_BASE_WIDTH
    rect = QRectF(0, 0, styles.PATH_BASE_WIDTH, styles.PATH_BASE_WIDTH)
    toHelixNumFont = QFont("Times", 10, QFont.Bold)
    
    def __init__(self, parentPH, fromStrand, fromIdx, toVH, toIdx, orientedLeft):
        super(PreCrossoverHandle, self).__init__(parentPH)
        self.fromVH = parentPH.vhelix()
        self.fromStrand = fromStrand
        self.fromIdx = fromIdx
        self.toVH = toVH
        self.toIdx = toIdx
        self.orientedLeft = orientedLeft
        
        self.fromVH.basesModified.connect(self.updateVisibilityAndEnabledness)
        self.toVH.basesModified.connect(self.updateVisibilityAndEnabledness)
        
        self.label = QGraphicsSimpleTextItem(str(toVH.number()), parent=self)
        self.label.setFont(self.toHelixNumFont)
        
        x = self.baseWidth * self.fromIdx
        y = (-1.25 if self.onTopStrand() else 2.25) * self.baseWidth
        self.setPos(x, y)
        halfLabelW = self.label.boundingRect().width() / 2
        labelX = self.baseWidth/2 - halfLabelW
        labelY = (-.10 if self.onTopStrand() else .48) * self.baseWidth
        self.label.setPos(labelX, labelY)
        self.updateVisibilityAndEnabledness()
    
    def onTopStrand(self):
        return self.fromVH.evenParity() and self.fromStrand==StrandType.Scaffold or\
               not self.fromVH.evenParity() and self.fromStrand==StrandType.Staple
            
    def couldFormNewCrossover(self):
        return self.fromVH.possibleNewCrossoverAt(self.fromStrand, self.fromIdx, self.toVH, self.toIdx)
    
    def crossoverExists(self):
        return self.fromVH.hasCrossoverAt(self.fromStrand, self.fromIdx)
    
    def is3pEndOfCrossover(self):
        return self.orientedLeft and self.onTopStrand() or\
               not self.orientedLeft and not self.onTopStrand
    
    def updateVisibilityAndEnabledness(self):
        shouldBeVisible = not self.crossoverExists()
        self.setVisible(shouldBeVisible)
        self.label.setVisible(shouldBeVisible)
        if self.couldFormNewCrossover():
            self.label.setBrush(self.enabbrush)
        else:
            self.label.setBrush(self.disabbrush)
        self.update()
    
    def paint(self, painter, option, widget=None):
        #Look Up Table
        pathLUT = (_ppathRD, _ppathRU, _ppathLD, _ppathLU)
        path = pathLUT[2*int(self.orientedLeft) + int(self.onTopStrand())]
        pen = self.disabpen
        if self.couldFormNewCrossover():
            if self.fromStrand == StrandType.Scaffold:
                pen = self.scafpen
            else:
                pen = self.stappen
        painter.setPen(pen)
        painter.drawPath(path)
    
    def boundingRect(self):
        return self.rect
    
    def mousePressEvent(self, event):
        if event.button() != Qt.LeftButton:
            return QGraphicsItem.mousePressEvent(self, event)
        if not self.couldFormNewCrossover():
            return
        # Determine upstream base
        fromHelix, toHelix = self.fromVH, self.toVH
        fromIdx, toIdx = self.fromIdx, self.toIdx
        if not self.is3pEndOfCrossover():
            fromHelix, toHelix = toHelix, fromHelix
            fromIdx, toIdx = toIdx, fromIdx
        # Create XoverHandlePair and store references
        # fromHelix.installXoverFrom3To5(StrandType.Scaffold, \
        #                                 fromIndex, toHelix, toIndex)
        fromHelix.installXoverFrom3To5(self.fromStrand, \
                                        fromIdx, toHelix, toIdx)

# 需要导入模块: from PyQt4.QtGui import QGraphicsSimpleTextItem [as 别名]
# 或者: from PyQt4.QtGui.QGraphicsSimpleTextItem import setPos [as 别名]
class ActiveSliceHandle(QGraphicsItem):
    """docstring for ActiveSliceHandle"""
    _baseWidth = styles.PATH_BASE_WIDTH
    _brush = QBrush(styles.orangefill)
    _labelbrush = QBrush(styles.orangestroke)
    _pen = QPen(styles.orangestroke, styles.SLICE_HANDLE_STROKE_WIDTH)
    _myfont = QFont("Times", 12, QFont.Bold)

    def __init__(self, pathHelixGroup):
        super(ActiveSliceHandle, self).__init__(pathHelixGroup)
        self._pathHelixGroup = None
        self._activeSlice = 0
        self._dragMode = False
        self._label = QGraphicsSimpleTextItem("", parent=self)
        self._label.setPos(0, -18)
        self._label.setFont(self._myfont)
        self._label.setBrush(self._labelbrush)
        self._label.hide()
        self.setPathHelixGroup(pathHelixGroup)
        self.setFlag(QGraphicsItem.ItemIsMovable)
        self.setAcceptHoverEvents(True)
        self.setZValue(styles.ZACTIVESLICEHANDLE)

    def controller(self):
        return self._pathHelixGroup.controller()

    def part(self):
        return self._pathHelixGroup.part()

    def pathHelixGroup(self):
        return self._pathHelixGroup

    def setPathHelixGroup(self, newPHG):
        if self._pathHelixGroup:
            self._pathHelixGroup.geometryChanged.disconnect(\
                                                   self.prepareGeometryChange)
            self._pathHelixGroup.displayedVHsChanged.disconnect(self._hideIfEmptySelection)
        if self._pathHelixGroup and self._pathHelixGroup.part():
            self._pathHelixGroup.part().activeSliceWillChange.disconnect(\
                                                      self._updateActiveSlice)
        self._pathHelixGroup = newPHG
        newPHG.geometryChanged.connect(self.prepareGeometryChange)
        newPHG.part().activeSliceWillChange.connect(self._updateActiveSlice)
        newPHG.displayedVHsChanged.connect(self._hideIfEmptySelection)
        self._hideIfEmptySelection()
        self._updateActiveSlice(newPHG.part().activeSlice())

    def activeSlice(self):
        return self.part().activeSlice()

    def setActiveSlice(self, baseIndex):
        self.part().setActiveSlice(baseIndex)
    
    def _hideIfEmptySelection(self):
        self.setVisible(len(self.pathHelixGroup().displayedVHs())>0)
    
    def _updateActiveSlice(self, baseIndex):
        """The slot that receives active slice changed notifications from
        the part and changes the receiver to reflect the part"""
        bi = int(baseIndex)
        if bi < 0 or bi >= self.part().dimensions()[2]:
            raise IndexError
        self.setPos(bi * self._baseWidth, -styles.PATH_HELIX_PADDING)
        self._activeSlice = bi
        if self._label:
            self._label.setText("%d" % bi)
            self._label.setX((self._baseWidth -\
                              self._label.boundingRect().width()) / 2)

    def boundingRect(self):
        return QRectF(0, 0, self._baseWidth,\
                      self.pathHelixGroup().boundingRect().height())

    def paint(self, painter, option, widget=None):
        if self.boundingRect().height() > 0:
            painter.setBrush(self._brush)
            painter.setPen(self._pen)
            painter.drawRect(self.boundingRect())
            self._label.show()
        else:
            self._label.hide()

    def resetBounds(self, maxBase):
        """Call after resizing virtualhelix canvas."""
        self.maxBase = maxBase
        self.maxX = (maxBase - 1) * self._baseWidth

    def hoverEnterEvent(self, event):
        if self.controller().isSelectToolActive():
            self.setCursor(Qt.OpenHandCursor)
        QGraphicsItem.hoverEnterEvent(self, event)
    # end def

    # def hoverMoveEvent(self, event):
    #     if not self.controller().isSelectToolActive():
    #         # pass None, but if needed pass self for having a special
    #         # behavior for the slice helix
    #         self.controller().toolHoverMove(None, event, flag=True)
    #     QGraphicsItem.hoverMoveEvent(self, event)
    # end def
#.........这里部分代码省略.........