def createPalette(self, color1, color2, passThroughBlack, colorNumber=250):
if passThroughBlack:
palette = [
qRgb(color1.red() - color1.red() * i * 2. / colorNumber,
color1.green() - color1.green() * i * 2. / colorNumber,
color1.blue() - color1.blue() * i * 2. / colorNumber)
for i in range(colorNumber / 2)
]
palette += [
qRgb(color2.red() * i * 2. / colorNumber,
color2.green() * i * 2. / colorNumber,
color2.blue() * i * 2. / colorNumber)
for i in range(colorNumber - (colorNumber / 2))
]
else:
palette = [
qRgb(
color1.red() +
(color2.red() - color1.red()) * i / colorNumber,
color1.green() +
(color2.green() - color1.green()) * i / colorNumber,
color1.blue() +
(color2.blue() - color1.blue()) * i / colorNumber)
for i in range(colorNumber)
]
return palette
def createPalette(self, color1, color2, passThroughBlack, colorNumber=250):
if passThroughBlack:
palette = [qRgb(color1.red() - color1.red() * i * 2. / colorNumber,
color1.green() - color1.green() * i * 2. / colorNumber,
color1.blue() - color1.blue() * i * 2. / colorNumber) for i in range(colorNumber / 2)]
palette += [qRgb(color2.red() * i * 2. / colorNumber, color2.green() * i * 2. / colorNumber,
color2.blue() * i * 2. / colorNumber) for i in range(colorNumber - (colorNumber / 2))]
else:
palette = [qRgb(color1.red() + (color2.red() - color1.red()) * i / colorNumber,
color1.green() + (color2.green() - color1.green()) * i / colorNumber,
color1.blue() + (color2.blue() - color1.blue()) * i / colorNumber) for i in
range(colorNumber)]
return palette
def update_properties(self):
## Mostly copied from OWScatterPlotGraph
if not self.plot():
return
if not self.rect:
x,y = self.axes()
self.rect = self.plot().data_rect_for_axes(x,y)
s = self.graph_transform().mapRect(self.rect).size().toSize()
if not s.isValid():
return
rx = s.width()
ry = s.height()
rx -= rx % self.granularity
ry -= ry % self.granularity
p = self.graph_transform().map(QPointF(0, 0)) - self.graph_transform().map(self.rect.topLeft())
p = p.toPoint()
ox = p.x()
oy = -p.y()
if self.classifier.classVar.is_continuous:
imagebmp = orangeom.potentialsBitmap(self.classifier, rx, ry, ox, oy, self.granularity, self.scale)
palette = [qRgb(255.*i/255., 255.*i/255., 255-(255.*i/255.)) for i in range(255)] + [qRgb(255, 255, 255)]
else:
imagebmp, nShades = orangeom.potentialsBitmap(self.classifier, rx, ry, ox, oy, self.granularity, self.scale, self.spacing)
palette = []
sortedClasses = get_variable_values_sorted(self.classifier.domain.classVar)
for cls in self.classifier.classVar.values:
color = self.plot().discPalette.getRGB(sortedClasses.index(cls))
towhite = [255-c for c in color]
for s in range(nShades):
si = 1-float(s)/nShades
palette.append(qRgb(*tuple([color[i]+towhite[i]*si for i in (0, 1, 2)])))
palette.extend([qRgb(255, 255, 255) for i in range(256-len(palette))])
self.potentialsImage = QImage(imagebmp, rx, ry, QImage.Format_Indexed8)
self.potentialsImage.setColorTable(palette)
self.potentialsImage.setNumColors(256)
self.pixmap_item.setPixmap(QPixmap.fromImage(self.potentialsImage))
self.pixmap_item.setPos(self.graph_transform().map(self.rect.bottomLeft()))
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