def _column1():
if role == Qt.DecorationRole:
continuous_palette = ContinuousPaletteGenerator(*var.colors)
line = continuous_palette.getRGB(np.arange(0, 1, 1 / 256))
data = np.arange(0, 256, dtype=np.int8).reshape(
(1, 256)).repeat(16, 0)
img = QImage(data, 256, 16, QImage.Format_Indexed8)
img.setColorCount(256)
img.setColorTable([qRgb(*x) for x in line])
img.data = data
return img
if role == Qt.ToolTipRole:
return "{} - {}".format(self._encode_color(var.colors[0]),
self._encode_color(var.colors[1]))
if role == ColorRole:
return var.colors
def _column1():
if role == Qt.DecorationRole:
continuous_palette = ContinuousPaletteGenerator(*var.colors)
line = continuous_palette.getRGB(np.arange(0, 1, 1 / 256))
data = np.arange(0, 256, dtype=np.int8). \
reshape((1, 256)). \
repeat(16, 0)
img = QImage(data, 256, 16, QImage.Format_Indexed8)
img.setColorCount(256)
img.setColorTable([qRgb(*x) for x in line])
img.data = data
return img
if role == Qt.ToolTipRole:
return "{} - {}".format(self._encode_color(var.colors[0]),
self._encode_color(var.colors[1]))
if role == ColorRole:
return var.colors
def _column1():
if role == Qt.DecorationRole:
continuous_palette = \
ContinuousPaletteGenerator(*desc.get_colors())
line = continuous_palette.getRGB(np.arange(0, 1, 1 / 256))
data = np.arange(0, 256, dtype=np.int8). \
reshape((1, 256)). \
repeat(16, 0)
img = QImage(data, 256, 16, QImage.Format_Indexed8)
img.setColorCount(256)
img.setColorTable([qRgb(*x) for x in line])
img.data = data
return img
if role == Qt.ToolTipRole:
colors = desc.get_colors()
return f"{self._encode_color(colors[0])} " \
f"- {self._encode_color(colors[1])}"
if role == ColorRole:
return desc.get_colors()
return None
def qimage_indexed_from_array(arr: np.ndarray,
colortable: Sequence[Sequence[int]]) -> QImage:
arr = np.asarray(arr, dtype=np.uint8)
h, w = arr.shape
colortable = np.asarray(colortable, dtype=np.uint8)
ncolors, nchannels = colortable.shape
img = QImage(w, h, QImage.Format_Indexed8)
img.setColorCount(ncolors)
if nchannels == 4:
qrgb_ = qrgba
elif nchannels == 3:
qrgb_ = qrgb
else:
raise ValueError
for i, c in enumerate(colortable):
img.setColor(i, qrgb_(*c))
buffer = img.bits().asarray(w * h)
view = np.frombuffer(buffer, np.uint8).reshape((h, w))
view[:, :] = arr
return img