def __init__(self):
gtk.DrawingArea.__init__(self)
self.parser = MathtexParser()
self.bakoma = BakomaFonts()
self.stix = StixFonts()
# # self.parser.parse(r"$R_{\mu\nu\rho}{}^{\sigma} = \nabla_\mu F_{\nu\rho}^\sigma$",
self.box = \
self.parser.parse(r"$x_{1,2}=\frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$",
self.bakoma, 18, 99.0)
self.rects, self.glyphs, self.bbox = ship(0, 0, self.box)
def __init__(self,
expr,
fontset='bakoma',
fontsize=12,
dpi=100,
default_style='it',
cache=False):
# Hash the arguments
h = hash((expr, fontset, fontsize, dpi, default_style))
if is_string_like(fontset):
fontset = self.fontset_mapping[fontset](default_style)
# Check the cache first
if cache and h in self._cache:
self.boxmodel = self._cache[h]
# Parse the expression
else:
self.boxmodel = MathtexParser().parse(expr, fontset, fontsize, dpi)
if cache:
self._cache[h] = self.boxmodel
# Use ship to get a stream of glyphs and rectangles
bbox = ship(0, 0, self.boxmodel)[2]
self.rects, self.glyphs, bbox = ship(-bbox[0], 0, self.boxmodel)
# Calculate the exact width, height and depth
self.width = bbox[2] - bbox[0]
self.height = self.boxmodel.height
self.depth = self.boxmodel.depth
self.fontset = fontset
self.fontsize = fontsize
self.dpi = dpi
class MathCell(gtk.DrawingArea):
"""Cell for display of maths."""
__gsignals__ = { "expose-event": "override" }
def __init__(self):
gtk.DrawingArea.__init__(self)
self.parser = MathtexParser()
self.bakoma = BakomaFonts()
self.stix = StixFonts()
# # self.parser.parse(r"$R_{\mu\nu\rho}{}^{\sigma} = \nabla_\mu F_{\nu\rho}^\sigma$",
self.box = \
self.parser.parse(r"$x_{1,2}=\frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$",
self.bakoma, 18, 99.0)
self.rects, self.glyphs, self.bbox = ship(0, 0, self.box)
def do_expose_event(self, event):
cr = self.window.cairo_create()
cr.rectangle(event.area.x, event.area.y,
event.area.width, event.area.height)
cr.clip()
width = self.bbox[2] - self.bbox[0]
height = self.box.height
depth = self.box.depth
backend = MathtexBackendCairo()
backend.set_canvas_size(self.box.width, self.box.height,
self.box.depth, 100)
backend.render(self.glyphs, self.rects)
backend.render_to_context(cr)
# self.draw(cr, *self.window.get_size())
def draw(self, cr, width, height):
cr.set_source_rgb(0.5, 0.5, 0.7)
cr.rectangle(0.5, 0.5, .5*width, .5*height)
cr.fill()
