def drawLines(imp, points=None):
if points and (len(points) % 2 == 0):
# points is numeric list of even length
pRoi = PointRoi(points[0::2], points[1::2], len(points) / 2)
pRoi.setShowLabels(True)
pRoi.setSize(3)
imp.setRoi(pRoi)
roi = imp.getRoi()
pp = roi.getFloatPolygon()
# print "Added", pp.npoints
if pp.npoints <= 1:
# don't draw if only one point
return
xys = []
for i in xrange(pp.npoints):
xys.append([pp.xpoints[i], pp.ypoints[i]])
ol = Overlay()
x0 = xys[0][0]
y0 = xys[0][1]
cal = imp.getCalibration()
for i in xrange(1, pp.npoints):
xi = xys[i][0]
yi = xys[i][1]
# prepare text label
d = math.sqrt((xi - x0)**2 + (yi - y0)**2) * cal.pixelWidth
dText = String.format("%.2f ", d) + cal.getUnits()
textOffset = 30
xt = xi
yt = yi
# if xi > x0:
# xt += textOffset
if xi < x0:
xt -= textOffset
# if yi > y0:
# yt += textOffset
if yi < y0:
yt -= textOffset
dTextRoi = TextRoi(xt, yt, dText)
ol.add(dTextRoi)
lineRoi = Line(x0, y0, xi, yi)
lineRoi.setStrokeWidth(1)
lineRoi.setStrokeColor(Color(255, 255, 0))
ol.add(lineRoi)
imp.setOverlay(ol)
imp.updateAndDraw()
def drawLines(imp, points=None):
if points and (len(points)%2 == 0):
# points is numeric list of even length
pRoi = PointRoi(points[0::2], points[1::2], len(points)/2)
pRoi.setShowLabels(True)
pRoi.setSize(3)
imp.setRoi(pRoi)
roi = imp.getRoi()
pp = roi.getFloatPolygon()
# print "Added", pp.npoints
if pp.npoints <= 1:
# don't draw if only one point
return
xys = []
for i in xrange(pp.npoints):
xys.append([pp.xpoints[i], pp.ypoints[i]])
ol = Overlay()
x0 = xys[0][0]
y0 = xys[0][1]
cal = imp.getCalibration()
for i in xrange(1, pp.npoints):
xi = xys[i][0]
yi = xys[i][1]
# prepare text label
d = math.sqrt((xi - x0)**2 + (yi - y0)**2) * cal.pixelWidth
dText = String.format("%.2f ", d) + cal.getUnits()
textOffset = 30
xt = xi
yt = yi
# if xi > x0:
# xt += textOffset
if xi < x0:
xt -= textOffset
# if yi > y0:
# yt += textOffset
if yi < y0:
yt -= textOffset
dTextRoi = TextRoi(xt, yt, dText)
ol.add(dTextRoi)
lineRoi = Line(x0, y0, xi, yi)
lineRoi.setStrokeWidth(1)
lineRoi.setStrokeColor(Color(255,255,0))
ol.add(lineRoi)
imp.setOverlay(ol)
imp.updateAndDraw()
