def draw(self, canvas):
top = canvas.h()
if self.head:
top -= self.head.height()
head_canvas = box.canvas(canvas,
0, top,
canvas.w(), top,
border=False, clip=False)
canvas.append(head_canvas)
used_space, done = self.head.draw(head_canvas)
self.head.reset()
while self.rows:
req = self.rows[0].height()
if len(self.rows) == 2: req += self.rows[1].height()
if top < req:
return canvas.h() - top, False
top -= self.rows[0].height()
row_canvas = box.canvas(canvas,
0, top,
canvas.w(), top,
border=False, clip=False)
canvas.append(row_canvas)
self.rows[0].draw(row_canvas)
del self.rows[0]
return canvas.h() - top, True
def draw(self, canvas):
head = self.head_object()
if head is not None:
head_canvas = box.canvas(canvas,
canvas.x(), canvas.y(),
canvas.w(), canvas.h())
header_height, done = head.draw(head_canvas)
canvas.append(head_canvas)
head.reset()
if not done:
raise ValueError("Not enough space to draw the header.")
else:
header_height = 0
self.start = False
subcanvas = box.canvas(canvas,
0, 0,
canvas.w(), canvas.h() - header_height,
border=False, clip=False)
canvas.append(subcanvas)
space_used, done = self.body.draw(subcanvas)
return ( header_height + space_used, done, )
def canvas(self, margin=0, border=False, clip=False):
"""
Return a canvas object for the whole page except a predefined
set of margins.
The margin parameter may be either:
- an integer - all four margins the same
- a pair - ( horizontal, vertical, )
- a 4-tuple - ( left, top, right, bottom, )
"""
if type(margin) == TupleType:
if len(margin) == 2:
h, v = margin
margin = ( h, v, h, v, )
else:
m = float(margin)
margin = ( m, m, m, m, )
l, t, r, b = margin
from t4.psg.drawing.box import canvas
ret = canvas(self, l, b,
self.w() - r - l, self.h() - t - b,
border, clip)
return ret
def draw(self, canvas):
if self.start:
margin_top = self.style.margin_top
else:
margin_top = 0
inner = box.canvas(canvas,
self.style.margin_left,
0,
canvas.w()- self.style.h_margin(),
canvas.h()- margin_top,
border=False, clip=False)
used_space, done = self.subsection.draw(inner)
if self.start:
used_space += self.style.margin_top
self.start = False
if done:
used_space += self.style.margin_bottom
if used_space > canvas.h():
used_space = canvas.h()
canvas.append(inner)
return ( used_space, done, )
def column_factory(document):
while True:
page = document.page("a4", None)
canvas = box.canvas(page, mm(20), mm(20),
page.w() - mm(40), page.h() - mm(40))
page.append(canvas)
yield engine.rectangular_column(canvas)
def column_factory(document):
while True:
page = document.page("a4", None)
h = mm(242.99)
left = rectangular_column(
canvas(page, mm(40), mm(25), mm(75), h, border=True))
right = rectangular_column(
canvas(page, mm(124.75), mm(25), mm(75), h, border=True))
page.append(left.box())
yield left
page.append(right.box())
yield right
def draw(self, canvas):
if self.style.background_color:
ax, ay = 0, 0
bx, by = canvas.w(), self.height()
canvas._( "gsave",
"newpath",
ax, ay, "moveto",
bx, ay, "lineto",
bx, by, "lineto",
ax, by, "lineto",
"closepath",
self.style.background_color,
"fill grestore")
left = 0
for cell in self.cells:
cell_canvas = box.canvas(canvas,
left, 0,
cell.width(), self.height(),
border=False, clip=False)
cell.draw(cell_canvas)
canvas.append(cell_canvas)
left += cell.width()
return self.height(), True
def draw(self, canvas):
inner = box.canvas(canvas,
0, 0,
self.width() + self.style.h_fringe(), canvas.h(),
border=False, clip=False)
canvas.append(inner)
return self.subsection.draw(inner)
def draw(self, canvas):
if len(self.sections) == 0:
raise ValueError("Container is empty.")
space_used = 0
idx = 0
while self.sections:
inner = box.canvas(canvas,
0, 0,
canvas.w(), canvas.h() - space_used,
border=False, clip=False)
canvas.append(inner)
used, done = car(self.sections).draw(inner)
space_used += used
if done:
self.sections = cdr(self.sections)
# If the remaining space on this canvas is smaller
# than the next sections's minimum height,
# we're done here.
if len(self.sections) > 0 and canvas.h() - space_used < \
car(self.sections).minimum_height(null_canvas(canvas)):
return space_used, False
else:
return space_used, False
return space_used, True
def predraw(self, canvas):
if self.canvas is not None: return
inner_canvas = box.canvas(canvas,
0, 0,
self.table.width()-self.style.h_fringe(),
10000,
border=False, clip=False)
self.section.minimum_height(null_canvas(inner_canvas))
space_used, done = self.section.draw(inner_canvas)
self.canvas = box.canvas(canvas,
0, -(inner_canvas.h() - space_used),
self.table.width(), space_used,
border=False, clip=False)
self.canvas.append(inner_canvas)
def render(self, layout_box):
if self.splitable:
# Check if there is room in the layout box for at least one line
min_height = self.style.v_padding() + self.style.v_margin() + \
self.style.font_size * self.style.line_height
else:
min_height = self.height(layout_box.w())
if layout_box.y_cursor() < min_height:
return self
needed_height = self.height(layout_box.w())
if layout_box.y_cursor() < needed_height:
height = layout_box.y_cursor()
else:
height = needed_height
margin_box = canvas(
layout_box,
self.style.margin_left,
layout_box.y_cursor() - height + self.style.margin_bottom,
layout_box.w() - self.style.h_margin(),
height - self.style.v_margin(),
debug.verbose)
layout_box.append(margin_box)
self.border_and_background(margin_box)
if self.style.hv_padding() == 0:
x = 0
y = 0
w = margin_box.w()
h = margin_box.h()
else:
x = self.style.padding_left
y = self.style.padding_bottom
w = margin_box.w() - self.style.h_padding()
h = margin_box.h() - self.style.v_padding()
if self.style.font.metrics.descender is not None:
y -= float(self.style.font.metrics.descender) \
* self.style.font_size / 1000
# Create a textbox
rest = self.typeset(margin_box, x, y, w, h)
if rest != "":
rest = div(rest, self.style)
else:
rest = None
layout_box.y_advance(min(height, layout_box.y_cursor()))
return rest
def draw(self, canvas):
used_space = 0
if self.start:
height = canvas.h() - self.style.border_top
used_space = self.style.border_top
else:
height = canvas.h()
inner = box.canvas(canvas,
self.style.border_left,
0,
canvas.w() - self.style.h_border(),
height,
border=False, clip=False)
used, done = self.subsection.draw(inner)
used_space += used
if done:
used_space += self.style.border_bottom
if used_space > canvas.h():
used_space = canvas.h()
if self.style.border_color:
if self.start and self.style.border_top:
self.rect( canvas,
0, canvas.h(),
canvas.w(), canvas.h()-self.style.border_top )
if self.style.border_left:
self.rect( canvas,
0, canvas.h(),
self.style.border_left, canvas.h()-used_space )
if self.style.border_right:
self.rect( canvas,
canvas.w(), canvas.h(),
canvas.w() - self.style.border_right,
canvas.h()- used_space )
if done and self.style.border_bottom:
self.rect( canvas,
canvas.w() - self.style.border_right,
canvas.h() - used_space,
0,
canvas.h() - used_space + self.style.border_bottom)
canvas.append(inner)
self.start = False
return ( used_space, done, )
def thumb_box_factory(output_document, paper_size_name, margin_width,
thumbs_per_page, thumb_width, thumb_height,thumb_spacing,
verbose, **kw):
while True:
page = output_document.page(page_size=paper_size_name)
canvas = page.canvas(margin_width, border=False)
for a in range(thumbs_per_page-1, -1, -1):
thumb_box = box.canvas(canvas,
0, a * ( thumb_height + thumb_spacing ),
thumb_width, thumb_height,
border=verbose, clipping=True)
canvas.append(thumb_box)
yield thumb_box
def draw(self, canvas):
if self.style.vertical_align == "top":
padding_top = 0.0
elif self.style.vertical_align == "middle":
padding_top = ( canvas.h() - self.height() ) / 2
elif self.style.vertical_align == "bottom":
padding_top = ( canvas.h() - self.height() )
else:
ValueError(self.style.vertical_align)
new_canvas = box.canvas(canvas,
0,
canvas.h() - padding_top - self.cell.canvas.h(),
self.cell.width(),
self.cell.canvas.h(),
border=False, clip=False)
canvas.append(new_canvas)
new_canvas.append(self.cell.canvas)
return self.cell.canvas.h(), True
def draw(self, canvas):
if self.start:
height = canvas.h() - self.style.padding_top
used_space = self.style.padding_top
else:
height = canvas.h()
used_space = 0
inner = box.canvas(canvas,
self.style.padding_left,
0,
canvas.w() - self.style.h_padding(),
height,
border=False, clip=False)
used, done = self.subsection.draw(inner)
used_space += used
if done:
used_space += self.style.padding_bottom
if used_space > canvas.h():
used_space = canvas.h()
if self.style.background_color:
ax, ay = 0, canvas.h()
bx, by = canvas.w(), canvas.h() - used_space
canvas._( "gsave",
"newpath",
ax, ay, "moveto",
bx, ay, "lineto",
bx, by, "lineto",
ax, by, "lineto",
"closepath",
self.style.background_color,
"fill",
"grestore" )
canvas.append(inner)
self.start = False
return ( used_space, done, )
def add_section(self, section):
# The test_canvas will not be connected and any PS created will
# be discarded.
minimum = section.minimum_height(null_canvas(self._canvas))
if minimum > self.remainder():
if self.is_empty():
# It these columns are something else than whole
# page-sized columns, this may not be what we want to
# do.
raise ValueError("Section requested more vertical "
"space than available in an empty "
"column.")
# We're full by definition
self._is_full = True
# And return the section as only partially rendered.
return section
if self.remainder() == self.height():
canvas = self._canvas
else:
canvas = box.canvas(self._canvas,
0, 0,
self._canvas.w(), self.remainder(),
border=False, clip=False)
self._canvas.append(canvas)
self._is_empty = False
used_vertical_space, done = section.draw(canvas)
if used_vertical_space > self.remainder():
raise ValueError("Section used more vertical space than provided "
"by the column.")
self._remainder -= used_vertical_space
if not done:
return section
else:
return None
def null_canvas(canvas):
return box.canvas(canvas,
0, 0,
canvas.w(), canvas.h(),
False, False)