def setGroovePixmapFromProfile(self, profile, colormap=None):
"""Set the pixmap displayed in the slider groove from histogram values.
:param Union[numpy.ndarray,None] profile:
1D array of values to display
:param Union[~silx.gui.colors.Colormap,str] colormap:
The colormap name or object to convert profile values to colors
"""
if profile is None:
self.setSliderPixmap(None)
return
profile = numpy.array(profile, copy=False)
if profile.size == 0:
self.setSliderPixmap(None)
return
if colormap is None:
colormap = colors.Colormap()
elif isinstance(colormap, str):
colormap = colors.Colormap(name=colormap)
assert isinstance(colormap, colors.Colormap)
rgbImage = colormap.applyToData(profile.reshape(1, -1))[:, :, :3]
qimage = convertArrayToQImage(rgbImage)
qpixmap = qt.QPixmap.fromImage(qimage)
self.setGroovePixmap(qpixmap)
def setGroovePixmapFromProfile(self, profile, colormap=None):
"""Set the pixmap displayed in the slider groove from histogram values.
:param Union[numpy.ndarray,None] profile:
1D array of values to display
:param Union[Colormap,str] colormap:
The colormap name or object to convert profile values to colors
"""
if profile is None:
self.setSliderPixmap(None)
return
profile = numpy.array(profile, copy=False)
if profile.size == 0:
self.setSliderPixmap(None)
return
if colormap is None:
colormap = colors.Colormap()
elif isinstance(colormap, str):
colormap = colors.Colormap(name=colormap)
assert isinstance(colormap, colors.Colormap)
rgbImage = colormap.applyToData(profile.reshape(1, -1))[:, :, :3]
qimage = convertArrayToQImage(rgbImage)
qpixmap = qt.QPixmap.fromImage(qimage)
self.setGroovePixmap(qpixmap)
def testConvertArrayToQImage(self):
"""Test conversion of numpy array to QImage"""
for format_, channels in [('Format_RGB888', 3), ('Format_ARGB32', 4)]:
with self.subTest(format_):
image = numpy.arange(3 * 3 * channels,
dtype=numpy.uint8).reshape(
3, 3, channels)
qimage = convertArrayToQImage(image)
self.assertEqual(qimage.height(), image.shape[0])
self.assertEqual(qimage.width(), image.shape[1])
self.assertEqual(qimage.format(), getattr(qt.QImage, format_))
for row in range(3):
for col in range(3):
# Qrgb has no alpha channel, not compared
# Qt uses x,y while array is row,col...
self.assertEqual(qt.QColor(qimage.pixel(col, row)),
qt.QColor(*image[row, col, :3]))
def testConvertArrayToQImage(self):
"""Test conversion of numpy array to QImage"""
for format_, channels in [('Format_RGB888', 3),
('Format_ARGB32', 4)]:
with self.subTest(format_):
image = numpy.arange(
3*3*channels, dtype=numpy.uint8).reshape(3, 3, channels)
qimage = convertArrayToQImage(image)
self.assertEqual(qimage.height(), image.shape[0])
self.assertEqual(qimage.width(), image.shape[1])
self.assertEqual(qimage.format(), getattr(qt.QImage, format_))
for row in range(3):
for col in range(3):
# Qrgb has no alpha channel, not compared
# Qt uses x,y while array is row,col...
self.assertEqual(qt.QColor(qimage.pixel(col, row)),
qt.QColor(*image[row, col, :3]))