/usr/lib/python2.7/dist-packages/pyqtgraph/graphicsItems/IsocurveItem.py is in python-pyqtgraph 0.9.10-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 | from .GraphicsObject import *
from .. import functions as fn
from ..Qt import QtGui, QtCore
class IsocurveItem(GraphicsObject):
"""
**Bases:** :class:`GraphicsObject <pyqtgraph.GraphicsObject>`
Item displaying an isocurve of a 2D array.To align this item correctly with an
ImageItem,call isocurve.setParentItem(image)
"""
def __init__(self, data=None, level=0, pen='w'):
"""
Create a new isocurve item.
============== ===============================================================
**Arguments:**
data A 2-dimensional ndarray. Can be initialized as None, and set
later using :func:`setData <pyqtgraph.IsocurveItem.setData>`
level The cutoff value at which to draw the isocurve.
pen The color of the curve item. Can be anything valid for
:func:`mkPen <pyqtgraph.mkPen>`
============== ===============================================================
"""
GraphicsObject.__init__(self)
self.level = level
self.data = None
self.path = None
self.setPen(pen)
self.setData(data, level)
def setData(self, data, level=None):
"""
Set the data/image to draw isocurves for.
============== ========================================================================
**Arguments:**
data A 2-dimensional ndarray.
level The cutoff value at which to draw the curve. If level is not specified,
the previously set level is used.
============== ========================================================================
"""
if level is None:
level = self.level
self.level = level
self.data = data
self.path = None
self.prepareGeometryChange()
self.update()
def setLevel(self, level):
"""Set the level at which the isocurve is drawn."""
self.level = level
self.path = None
self.prepareGeometryChange()
self.update()
def setPen(self, *args, **kwargs):
"""Set the pen used to draw the isocurve. Arguments can be any that are valid
for :func:`mkPen <pyqtgraph.mkPen>`"""
self.pen = fn.mkPen(*args, **kwargs)
self.update()
def setBrush(self, *args, **kwargs):
"""Set the brush used to draw the isocurve. Arguments can be any that are valid
for :func:`mkBrush <pyqtgraph.mkBrush>`"""
self.brush = fn.mkBrush(*args, **kwargs)
self.update()
def updateLines(self, data, level):
##print "data:", data
##print "level", level
#lines = fn.isocurve(data, level)
##print len(lines)
#self.path = QtGui.QPainterPath()
#for line in lines:
#self.path.moveTo(*line[0])
#self.path.lineTo(*line[1])
#self.update()
self.setData(data, level)
def boundingRect(self):
if self.data is None:
return QtCore.QRectF()
if self.path is None:
self.generatePath()
return self.path.boundingRect()
def generatePath(self):
if self.data is None:
self.path = None
return
lines = fn.isocurve(self.data, self.level, connected=True, extendToEdge=True)
self.path = QtGui.QPainterPath()
for line in lines:
self.path.moveTo(*line[0])
for p in line[1:]:
self.path.lineTo(*p)
def paint(self, p, *args):
if self.data is None:
return
if self.path is None:
self.generatePath()
p.setPen(self.pen)
p.drawPath(self.path)
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