def generate_pdf(self):
buffer = self.buffer
doc = BaseDocTemplate(
buffer,
rightMargin=0.3 * inch,
leftMargin=0.3 * inch,
topMargin=0.3 * inch,
bottomMargin=inch / 4,
)
land_frame = Frame(0, 0, self.height, self.width, id='LFrame')
land_frame._topPadding = 22
land_frame._leftPadding = 11
land_frame._bottomPadding = 22
port_frame = Frame(0, 0, self.width, self.height, id='PFrame')
port_frame._topPadding = 22
port_frame._leftPadding = 11
port_frame._bottomPadding = 22
landscape_temp = PageTemplate(id='landscape_temp',
frames=[
land_frame,
],
pagesize=landscape(self.pagesize))
portrait_temp = PageTemplate(id='portrait_temp',
frames=[
port_frame,
],
pagesize=self.pagesize)
# Our container for 'Flowable' objects
elements = []
# A large collection of style sheets pre-made for us
styles = getSampleStyleSheet()
styles.add(ParagraphStyle(name='centered', alignment=TA_CENTER))
# Draw things on the PDF. Here's where the PDF generation happens.
# See the ReportLab documentation for the full list of functionality.
template_list = []
for result in self.results:
# image = 'http://127.0.0.1:8000' + result.image.url
image = self.path_relative_to_file(__file__,
'..' + result.image.url)
# image = result.image.url
im = self.scale_image(image)
im.hAlign = 'CENTER'
im.vAlign = 'MIDDLE'
img = utils.ImageReader(image)
width, height = img.getSize()
if width > height:
next_page = NextPageTemplate('landscape_temp')
next_page.hAlign = 'CENTER'
next_page.vAlign = 'MIDDLE'
next_page.height = self.width
next_page.width = self.height
template_list.append(landscape_temp)
elements.append(next_page)
else:
next_page = NextPageTemplate('portrait_temp')
next_page.hAlign = 'CENTER'
next_page.vAlign = 'MIDDLE'
next_page.height = self.height
next_page.width = self.width
template_list.append(portrait_temp)
elements.append(next_page)
elements.append(im)
#elements.append(PageBreak())
doc.addPageTemplates(template_list)
doc.build(elements)
# Get the value of the BytesIO buffer and write it to the response.
pdf = buffer.getvalue()
buffer.close()
return pdf
