def drawMedialAxes(self, layer):
'''Draw the medial axes (水平垂直轴线).'''
# TODO: set vertical and horizontal in dialog
vertical = 0.5
horizontal = 0.5
scale = self.getScale()
view = Glyphs.font.currentTab.graphicView()
visibleRect = view.visibleRect()
activePosition = view.activePosition()
viewOriginX = (visibleRect.origin.x - activePosition.x) / scale
viewOriginY = (visibleRect.origin.y - activePosition.y) / scale
viewWidth = visibleRect.size.width / scale
viewHeight = visibleRect.size.height / scale
height = layer.ascender - layer.descender
width = layer.width
x = horizontal * width
y = layer.descender + vertical * height
# TODO: color
color = NSColor.systemGreenColor()
color.set()
path = NSBezierPath.bezierPath()
path.moveToPoint_((viewOriginX, y))
path.lineToPoint_((viewOriginX + viewWidth, y))
path.moveToPoint_((x, viewOriginY))
path.lineToPoint_((x, viewOriginY + viewHeight))
path.setLineWidth_(1 / scale)
path.stroke()
