def setFlagQimage(self):
(nx,ny) = self._image_for_display.shape
image_for_display = self._image_for_display.copy()
if not self._flags_array is None:
if self.complex:
image_for_display[:nx//2,:] = numpy.where(self._flags_array,0,self._image_for_display[:nx//2,:])
image_for_display[nx//2:,:] = numpy.where(self._flags_array,0,self._image_for_display[nx//2:,:])
else:
image_for_display = numpy.where(self._flags_array,0,self._image_for_display)
if not self._nan_flags_array is None:
if self.complex:
image_for_display[:nx//2,:] = numpy.where(self._nan_flags_array,1,image_for_display[:nx//2,:])
image_for_display[nx//2:,:] = numpy.where(self._nan_flags_array,1,image_for_display[nx//2:,:])
else:
image_for_display = numpy.where(self._nan_flags_array,1,image_for_display)
self.flags_Qimage = convertToQImage(image_for_display,True).mirrored(0, 1)
# set color scale a la HippoDraw Scale
if self.display_type == "hippo":
self.toHippo(self.flags_Qimage)
# set color scale to Grayscale
if self.display_type == "grayscale":
self.toGrayScale(self.flags_Qimage)
# set zero to black to display flag image pixels in black
self.flags_Qimage.setColor(0, qRgb(self.flag_colour, self.flag_colour, self.flag_colour))
self.flags_Qimage.setColor(1, qRgb(self.nan_colour, self.nan_colour, self.nan_colour))
def toHippo(self, Qimage):
dv = 255.0
vmin = 1.0
for i in range(2, 256):
r = 1.0
g = 1.0
b = 1.0
v = 1.0 * i
if (v < (vmin + 0.25 * dv)):
r = 0;
if dv != 0:
g = 4 * (v - vmin) / dv;
elif (v < (vmin + 0.5 * dv)):
r = 0;
if dv != 0:
b = 1 + 4 * (vmin + 0.25 * dv - v) / dv;
elif (v < (vmin + 0.75 * dv)):
b = 0;
if dv != 0:
r = 4 * (v - vmin - 0.5 * dv) / dv;
else:
b = 0;
if dv != 0:
g = 1 + 4 * (vmin + 0.75 * dv - v) / dv;
else:
r = 0
red = int ( r * 255. )
green = int ( g * 255. )
blue = int ( b * 255. )
# the following call will use the previous computations to
# set up a hippo-like color display
Qimage.setColor(i, qRgb(red, green, blue))
def to_QImage(self, image):
# convert to 8 bit image
image_for_display = None
if image.dtype == numpy.complex64 or image.dtype == numpy.complex128:
self.complex = True
real_array = image.real
if self.log_scale:
temp_array = self.convert_to_log(real_array)
temp_array = self.convert_to_log(real_array)
if not self.r_cmin is None and not self.r_cmax is None:
limits = self.convert_limits([self.r_cmin,self.r_cmax])
else:
limits = [self.r_cmin, self.r_cmax]
byte_image = bytescale(temp_array,limits)
else:
limits = [self.r_cmin,self.r_cmax]
byte_image = bytescale(real_array,limits)
(nx,ny) = real_array.shape
image_for_display = numpy.empty(shape=(nx*2,ny),dtype=byte_image.dtype);
image_for_display[:nx,:] = byte_image
imag_array = image.imag
if self.log_scale:
temp_array = self.convert_to_log(imag_array)
if not self.i_cmin is None and not self.i_cmax is None:
limits = self.convert_limits([self.i_cmin,self.i_cmax])
else:
limits = [self.i_cmin, self.i_cmax]
byte_image = bytescale(temp_array,limits)
else:
limits = [self.i_cmin,self.i_cmax]
byte_image = bytescale(imag_array,limits)
image_for_display[nx:,:] = byte_image
else:
if self.log_scale:
temp_array = self.convert_to_log(image)
if not self.r_cmin is None and not self.r_cmax is None:
limits = self.convert_limits([self.r_cmin,self.r_cmax])
else:
limits = [self.r_cmin, self.r_cmax]
#print 'to_QImage log limits = ', limits
image_for_display = bytescale(temp_array,limits)
else:
limits = [self.r_cmin,self.r_cmax]
#print 'to_QImage real limits = ', limits
image_for_display = bytescale(image,limits)
# turn image into a QImage, and return result
if not self._nan_flags_array is None:
if self.complex:
image_for_display[:nx,:] = numpy.where(self._nan_flags_array,1,image_for_display[:nx,:])
image_for_display[nx:,:] = numpy.where(self._nan_flags_array,1,image_for_display[nx:,:])
else:
image_for_display = numpy.where(self._nan_flags_array,1,image_for_display)
self._image_for_display = image_for_display
result = convertToQImage(image_for_display,True).mirrored(0, 1)
# always suppress NaNs
if not self._nan_flags_array is None:
result.setColor(1, qRgb(self.nan_colour, self.nan_colour, self.nan_colour))
return result
def setData(self, xyzs, xRange=None, yRange=None):
self.xyzs = xyzs
shape = xyzs.shape
if not xRange:
xRange = (0, shape[0])
if not yRange:
yRange = (0, shape[1])
self.xMap = QwtScaleMap(0, xyzs.shape[0], *xRange)
self.plot().setAxisScale(QwtPlot.xBottom, *xRange)
self.yMap = QwtScaleMap(0, xyzs.shape[1], *yRange)
self.plot().setAxisScale(QwtPlot.yLeft, *yRange)
self.image = toQImage(bytescale(self.xyzs)).mirrored(False, True)
for i in range(0, 256):
self.image.setColor(i, qRgb(i, 0, 255 - i))
def setData(self, xyzs, xRange = None, yRange = None):
self.xyzs = xyzs
shape = xyzs.shape
if not xRange:
xRange = (0, shape[0])
if not yRange:
yRange = (0, shape[1])
self.xMap = QwtScaleMap(0, xyzs.shape[0], *xRange)
self.plot().setAxisScale(QwtPlot.xBottom, *xRange)
self.yMap = QwtScaleMap(0, xyzs.shape[1], *yRange)
self.plot().setAxisScale(QwtPlot.yLeft, *yRange)
self.image = toQImage(bytescale(self.xyzs)).mirrored(False, True)
for i in range(0, 256):
self.image.setColor(i, qRgb(i, 0, 255-i))
def rgb(self, mode, pos):
if pos <= 0.:
return self.__stops[0].rgb
if pos >= 1.0:
return self.__stops[-1].rgb
index = self.findUpper(pos)
if mode == QwtLinearColorMap.FixedColors:
return self.__stops[index-1].rgb
else:
s1 = self.__stops[index-1]
ratio = (pos-s1.pos)/s1.posStep
r = int(s1.r0 + ratio*s1.rStep)
g = int(s1.g0 + ratio*s1.gStep)
b = int(s1.b0 + ratio*s1.bStep)
if self.__doAlpha:
if s1.aStep:
a = int(s1.a0 + ratio*s1.aStep)
return qRgba(r, g, b, a)
else:
return qRgba(r, g, b, s1.a)
else:
return qRgb(r, g, b)
def rgb(self, mode, pos):
if pos <= 0.:
return self.__stops[0].rgb
if pos >= 1.0:
return self.__stops[-1].rgb
index = self.findUpper(pos)
if mode == QwtLinearColorMap.FixedColors:
return self.__stops[index - 1].rgb
else:
s1 = self.__stops[index - 1]
ratio = (pos - s1.pos) / s1.posStep
r = int(s1.r0 + ratio * s1.rStep)
g = int(s1.g0 + ratio * s1.gStep)
b = int(s1.b0 + ratio * s1.bStep)
if self.__doAlpha:
if s1.aStep:
a = int(s1.a0 + ratio * s1.aStep)
return qRgba(r, g, b, a)
else:
return qRgba(r, g, b, s1.a)
else:
return qRgb(r, g, b)
def oldToQImage(array):
"""Converts a numpy array to a QImage
A Python version of PyQt4.Qwt5.toQImage(array) in PyQwt < 5.2.
Function written by Gerard Vermeulen
"""
if array.ndim != 2:
raise RuntimeError('array must be 2-D')
nx, ny = array.shape # width, height
xstride, ystride = array.strides
if array.dtype == numpy.uint8:
image = QImage(nx, ny, QImage.Format_Indexed8)
f_array = numpy.reshape(array,(nx*ny,),order='F')
for j in range(ny):
pointer = image.scanLine(j)
pointer.setsize(nx*array.itemsize)
memory = numpy.frombuffer(pointer, numpy.uint8)
first_value = j*nx
last_value = (j+1)*nx
memory[:] = f_array[first_value:last_value]
image.setColorCount(256)
for i in range(256):
image.setColor(i, qRgb(i, i, i))
return image
elif array.dtype == numpy.uint32:
image = Qt.QImage(
array.tostring(), width, height, Qt.QImage.Format_ARGB32)
f_array = numpy.reshape(array,(nx*ny,),order='F')
for j in xrange(ny):
pointer = image.scanLine(j)
pointer.setsize(nx*array.itemsize)
memory = numpy.frombuffer(pointer, numpy.uint32)
first_value = j*nx
last_value = (j+1)*nx
memory[:] = f_array[first_value:last_value]
return image
else:
raise RuntimeError('array.dtype must be uint8 or uint32')
def newToQImage(array):
"""Converts a numpy array to a QImage
A Python version of PyQt4.Qwt5.toQImage(array) in PyQwt >= 5.2.
Function written by Gerard Vermeulen
"""
if array.ndim != 2:
raise RuntimeError('array must be 2-D')
height, width = array.shape
if array.dtype == numpy.uint8:
# image = QImage(array, width, height, QImage.Format_Indexed8)
# The next statement shows that QImage does not increase the
# reference count of the buffer object to keep the data valid.
image = Qt.QImage(
array.tostring(), width, height, Qt.QImage.Format_Indexed8)
image.setNumColors(256)
for i in range(256):
image.setColor(i, qRgb(i, i, i))
return image
elif array.dtype == numpy.uint32:
image = Qt.QImage(
array.tostring(), width, height, Qt.QImage.Format_ARGB32)
return image
else:
raise RuntimeError('array.dtype must be uint8 or uint32')
def toGrayScale(self, Qimage):
for i in range(0, 256):
Qimage.setColor(i, qRgb(i, i, i))