def _get_color (self, value, asQColor=False, alpha=0.5):
''' Get interpolated color from value '''
if not len(self.vcolors):
return (0.,0.,0.,self.alpha)
elif len(self.vcolors) == 1:
return self.vcolors[0][1]
elif value < 0.0:
return self.vcolors[0][1]
elif value > 1.0:
return self.vcolors[-1][1]
sup_color = self.vcolors[0]
inf_color = self.vcolors[-1]
for i in xrange (len(self.vcolors)-1):
if value < self.vcolors[i+1][0]:
inf_color = self.vcolors[i]
sup_color = self.vcolors[i+1]
break
r = (value-inf_color[0])/(sup_color[0]-inf_color[0])
if not asQColor:
return (sup_color[1][0]*r + inf_color[1][0]*(1-r),
sup_color[1][1]*r + inf_color[1][1]*(1-r),
sup_color[1][2]*r + inf_color[1][2]*(1-r))
from PyQt4.QtGui import QColor
q = QColor()
q.setRedF(sup_color[1][0]*r + inf_color[1][0]*(1-r))
q.setGreen(sup_color[1][1]*r + inf_color[1][1]*(1-r))
q.setBlueF(sup_color[1][2]*r + inf_color[1][2]*(1-r))
q.setAlphaF(alpha)
return q
def _get_color(self, value, asQColor=False, alpha=0.5):
''' Get interpolated color from value '''
if not len(self.vcolors):
return (0., 0., 0., self.alpha)
elif len(self.vcolors) == 1:
return self.vcolors[0][1]
elif value < 0.0:
return self.vcolors[0][1]
elif value > 1.0:
return self.vcolors[-1][1]
sup_color = self.vcolors[0]
inf_color = self.vcolors[-1]
for i in xrange(len(self.vcolors) - 1):
if value < self.vcolors[i + 1][0]:
inf_color = self.vcolors[i]
sup_color = self.vcolors[i + 1]
break
r = (value - inf_color[0]) / (sup_color[0] - inf_color[0])
if not asQColor:
return (sup_color[1][0] * r + inf_color[1][0] * (1 - r),
sup_color[1][1] * r + inf_color[1][1] * (1 - r),
sup_color[1][2] * r + inf_color[1][2] * (1 - r))
from PyQt4.QtGui import QColor
q = QColor()
q.setRedF(sup_color[1][0] * r + inf_color[1][0] * (1 - r))
q.setGreen(sup_color[1][1] * r + inf_color[1][1] * (1 - r))
q.setBlueF(sup_color[1][2] * r + inf_color[1][2] * (1 - r))
q.setAlphaF(alpha)
return q
