def draw(self):
# canvas draw callback
drawing.save()
self._drawGrid()
drawing.restore()
font = CurrentFont()
if self.show_fixed and self.system is not None and self.system.fixed_units:
# display the fixed widths of the current unitization system
self.draw_histogram(font, self.system.upm, (0, 0, 1, 0.5), True, histogram=self.system.fixed_units)
# draw the histogram for the current font
print "__font:", font
print "__font.info:", font.info
self.draw_histogram(font, font.info.unitsPerEm, (1, 0, 0, 1), True)
def _drawGrid(self):
label_every = 1
if self.units > 24:
label_every = 2
drawing.save()
drawing.strokeWidth(0)
drawing.stroke(None)
drawing.fill(0.88, 0.92, 0.98)
if self.system is not None:
if self.system.min_units is not None:
drawing.rect(0, 0, 10 + self.system.min_units * self.histogram_width / (self.units * self.ems_horizontal), self.histogram_height)
if self.system.max_units is not None:
drawing.rect(10 + self.system.max_units * self.histogram_width / (self.units * self.ems_horizontal), 0, self.histogram_width, self.histogram_height)
drawing.strokeWidth(1.0)
drawing.stroke(0.8, 0.8, 0.8)
drawing.fill(0.6, 0.6, 0.6)
for u in range(0, int(ceil(self.units * self.ems_horizontal))):
x = 10 + u * self.histogram_width / (self.units * self.ems_horizontal)
if u == self.units:
# mark the full em
drawing.stroke(0, 0, 0)
drawing.line(x, 20, x, self.histogram_height-10)
drawing.strokeWidth(0)
drawing.text("1 em", x + 4, self.histogram_height - 21)
drawing.strokeWidth(1.0)
elif u % 10 == 0:
# make every 10th line darker
drawing.stroke(0.5, 0.5, 0.5)
drawing.line(x, 20, x, self.histogram_height - 20)
else:
drawing.stroke(0.8, 0.8, 0.8)
drawing.line(x, 20, x, self.histogram_height - 30)
if u % label_every == 0:
drawing.strokeWidth(0)
drawing.text("%s" % (u), x - 3 * len(str(u)), 5)
drawing.restore()
font = CurrentFont()
if self.show_fixed and self.system is not None and self.system.fixed_units:
# display the fixed widths of the current unitization system
self.draw_histogram(font, self.system.upm, (0, 0, 1, 0.5), True, histogram=self.system.fixed_units)
# draw the histogram for the current font
print "__font:", font
print "__font.info:", font.info
self.draw_histogram(font, font.info.unitsPerEm, (1, 0, 0, 1), True)
def draw_histogram(self, font, upm, color, show_glyphs=False, histogram=None):
if histogram is None:
try:
histogram = self.histogram
except Exception, err:
self.calculate_histogram
drawing.save()
if histogram is None:
try:
histogram = self.histogram
except:
pass
if histogram is None:
print "__no Histogram"
return
drawing.fill(1, 0.5, 0.2, 1.0)
drawing.stroke(color[0], color[1], color[2], color[3])
try:
for width in sorted(histogram.keys()):
num = len(histogram[width])
x = 10 + width * self.histogram_width / (upm * self.ems_horizontal)
drawing.save()
