def create_prod_labels(self):
"""
These values should be measured from the printed page.
In all the following calculations, the bottom left corner of
the page is considered to be at the origin of the x-y plane.
All the coordinates should be provided w.r.t. the this origin.
"""
# page size
page_H = 297*mm # A4
page_W = 210*mm # A4
# coordinates of lower left corner of single label w.r.t. origin
box_X = 16.5*mm
box_Y = 9.6*mm
# distance between rows and columns of labels
box_X_shift = 46.2*mm
box_Y_shift = 36.0*mm
pdfmetrics.registerFont(TTFont('Arial', 'ARIALN.TTF'))
c = Canvas(self.outFile)
c.setLineWidth(0.1)
# horizontal lines
for i in range(7):
c.line(42*mm + i*box_Y_shift, 10*mm,
42*mm + i*box_Y_shift, page_W-10*mm)
# vertical lines
for i in range(3):
c.line(2*mm, 58*mm + i*box_X_shift,
page_H-2*mm, 58*mm + i*box_X_shift)
for i in range(4):
dx = box_X + i*box_X_shift
for j in range(8):
dy = box_Y + j*box_Y_shift
self.draw_single_label(dy, dx, c)
c.setPageRotation(90)
c.setPageSize((page_W, page_H))
c.save()
self.message.setText(
"Creating " + self.outFile.replace(self.cdir, "Documents/"))
