def show_text(cr, x, y, width, size, text, center=False):
layout = PangoCairo.create_layout(cr)
layout.set_text(text, -1)
while True:
desc = Pango.FontDescription("{} {}".format(FONT_DESCRIPTION, size))
layout.set_font_description(desc)
ink_rect, logical_rect = layout.get_pixel_extents()
logical_width = logical_rect.x + logical_rect.width
if logical_width + STROKE_WIDTH < width:
break
size -= 1
if center:
x += (width - logical_width) / 2
cr.move_to(x, y)
line = layout.get_line(0)
PangoCairo.layout_line_path(cr, line)
cr.set_source_rgb(0, 0, 0)
cr.set_line_join(cairo.LINE_JOIN_ROUND)
cr.set_line_width(STROKE_WIDTH)
cr.stroke_preserve()
cr.set_source_rgb(1, 1, 1)
cr.fill()
def draw_page(self, _oPrintOp, oContext, iPageNum):
"""Page drawing callback.
"""
# pylint: disable=too-many-locals
# We use lots of variables for clarity
iStartPageLine, iEndPageLine = 0, 0
aPageBreaks = self._aPageBreaks
oLayout = self._oPangoLayout
if iPageNum > 0:
iStartPageLine = aPageBreaks[iPageNum - 1]
if iPageNum < len(aPageBreaks):
iEndPageLine = aPageBreaks[iPageNum]
else:
iEndPageLine = oLayout.get_line_count()
oCairoContext = oContext.get_cairo_context()
oCairoContext.set_source_rgb(0, 0, 0)
oCairoContext.set_line_width(0.1)
oIter = oLayout.get_iter()
fStartPos = 0.0
iLine = 0
while True:
if iLine >= iStartPageLine:
# oIter.get_line is a bit buggy with pyGtkcompat,
# so we side step it by querying the layout directly
oLine = oLayout.get_line(iLine)
_oInkRect, oLogicalRect = oLine.get_extents()
fBaseLine = float(oIter.get_baseline()) / Pango.SCALE
if iLine == iStartPageLine:
fStartPos = fBaseLine
# line x co-ordinate / SCALE
fXPos = float(oLogicalRect.x) / Pango.SCALE
# baseline - start pos - line y-co-ordinate / SCALE
fYPos = fBaseLine - fStartPos - (float(oLogicalRect.y) /
Pango.SCALE)
oCairoContext.move_to(fXPos, fYPos)
PangoCairo.layout_line_path(oCairoContext, oLine)
oCairoContext.stroke_preserve()
oCairoContext.fill()
iLine += 1
if not (iLine < iEndPageLine and oIter.next_line()):
break
def text_path(context, font, size, text, debug=False):
"""Create a Pango text layout and return it as a Cairo path"""
context.save()
pg_layout = PangoCairo.create_layout(context)
pg_context = pg_layout.get_context()
font_options = cairo.FontOptions()
font_options.set_antialias(cairo.ANTIALIAS_SUBPIXEL)
PangoCairo.context_set_font_options(pg_context, font_options)
font_descp = "{0} {1:d}".format(font, size)
pg_layout.set_font_description(Pango.FontDescription(font_descp))
pg_layout.set_text(text, -1) # force length calculation
PangoCairo.update_layout(context, pg_layout)
# TODO watch out for ink & logical, need check
extents = pg_layout.get_pixel_extents()[0]
# TODO debug necessary?
if debug:
context.set_source_rgb(0, 0, 0)
PangoCairo.show_layout(context, pg_layout)
print("text_path: ({0}, {1}, {2}, {3})".format(extents.x, extents.y,
extents.width,
extents.height))
context.rectangle(extents.x, extents.y, extents.width, extents.height)
context.set_line_width(1.0)
context.set_line_join(cairo.LINE_JOIN_MITER)
context.set_source_rgb(0, 0.8, 0)
context.stroke()
#PangoCairo.layout_path(context, pg_layout)
PangoCairo.layout_line_path(context, pg_layout.get_line(0))
path = context.copy_path()
# clear the path
context.new_path()
context.restore()
return (path, extents, xheight(pg_layout).height)
