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# Copyright 2007 Mitchell N. Charity
#
# This file is part of Ruler.
#
# Ruler is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ruler is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ruler. If not, see <http://www.gnu.org/licenses/>
import gtk
import cairo
from util import mm, dimensions_mm, set_background_color, write
class ScreenGrid_mm():
def __init__(self, font, font_bold, w, h):
self.font = font
self.font_bold = font_bold
self.w = w
self.h = h
def draw(self, c, dpi):
set_background_color(c, self.w, self.h)
nw, nh = dimensions_mm(dpi, self.w, self.h)
draw_numbers(self, c, dpi, nw, nh, 10, "mm")
draw_grid(c, dpi, 1, 1, nw, nh)
draw_grid(c, dpi, 10, 2, nw, nh)
draw_grid(c, dpi, 100, 3.5, nw, nh)
class ScreenGrid_cm():
def __init__(self, font, font_bold, w, h):
self.font = font
self.font_bold = font_bold
self.w = w
self.h = h
def draw(self, c, dpi):
set_background_color(c, self.w, self.h)
nw, nh = dimensions_mm(dpi, self.w, self.h)
c.set_antialias(cairo.ANTIALIAS_GRAY)
draw_numbers(self, c, dpi, nw, nh)
draw_grid(c, dpi, 10, 2, nw, nh)
draw_grid(c, dpi, 100, 3.5, nw, nh)
def draw_numbers(p, c, dpi, nw, nh, m=1, unit="cm"):
c.save()
v = 0.7
c.set_source_rgb(v, v, v)
for n in range(1, 11):
c.move_to(mm(dpi, n * 10), mm(dpi, n * 10))
c.rel_move_to(mm(dpi, 0), mm(dpi, 3))
write(c, "%d" % (n * m), p.font, mm(dpi, 4), centered=True)
if n == 1:
c.rel_move_to(mm(dpi, -0.5), mm(dpi, -0.5))
write(c, " "+unit, p.font, mm(dpi, 3))
c.restore()
def draw_grid(c, dpi, step, stroke, nw, nh):
c.save()
c.set_line_width(stroke)
lay_mm_grid(c, dpi, width_mm=nw, height_mm=nh, step_mm=step)
c.stroke()
c.restore()
def lay_mm_grid(c, dpi, width_mm=152, height_mm=114, step_mm=1):
c.save()
z = mm(dpi, 1)
c.scale(z, z)
for x in range(0, width_mm, step_mm):
c.move_to(x, 0)
c.rel_line_to(0, height_mm)
for y in range(0, height_mm, step_mm):
c.move_to(0, y)
c.rel_line_to(width_mm, 0)
c.restore()
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