def _paint_inner_grid(self, painter: QPainter, rect: QRect,
colors) -> None:
margin = 10
job_nr = len(colors)
grid_dim = math.ceil(math.sqrt(job_nr))
k = 0
colors_hash = hash(tuple([color.name() for color in colors]))
if colors_hash not in self._image_cache:
foreground_image = QImage(grid_dim, grid_dim, QImage.Format_ARGB32)
foreground_image.fill(QColorConstants.Gray)
for y in range(grid_dim):
for x in range(grid_dim):
if k >= job_nr:
color = QColorConstants.Gray
else:
color = colors[k]
foreground_image.setPixel(x, y, color.rgb())
k += 1
self._image_cache[colors_hash] = foreground_image
else:
foreground_image = self._image_cache[colors_hash]
painter.drawImage(rect, foreground_image)
def cmap2pixmap(cmap, steps=50):
"""Convert a Ginga colormap into a QPixmap
"""
inds = numpy.linspace(0, 1, steps)
n = len(cmap.clst) - 1
tups = [ cmap.clst[int(x*n)] for x in inds ]
rgbas = [QColor(int(r * 255), int(g * 255),
int(b * 255), 255).rgba() for r, g, b in tups]
im = QImage(steps, 1, QImage.Format_Indexed8)
im.setColorTable(rgbas)
for i in range(steps):
im.setPixel(i, 0, i)
im = im.scaled(128, 32)
pm = QPixmap.fromImage(im)
return pm
def cmap2pixmap(cmap, steps=50):
"""Convert a Ginga colormap into a QPixmap
"""
inds = numpy.linspace(0, 1, steps)
n = len(cmap.clst) - 1
tups = [ cmap.clst[int(x*n)] for x in inds ]
rgbas = [QColor(int(r * 255), int(g * 255),
int(b * 255), 255).rgba() for r, g, b in tups]
im = QImage(steps, 1, QImage.Format_Indexed8)
im.setColorTable(rgbas)
for i in range(steps):
im.setPixel(i, 0, i)
im = im.scaled(128, 32)
pm = QPixmap.fromImage(im)
return pm
