def _reset(self):
mainlog.debug("frame reset")
r = Frame._reset(self)
self.top_of_frame = True
return r
def _draw_front_frame(self, canvas, width, height):
front_frame = Frame(
self.border_front[Border.LEFT],
self.border_front[Border.BOTTOM],
width - self.border_front[Border.LEFT] -
self.border_front[Border.RIGHT],
height - self.border_front[Border.TOP] -
self.border_front[Border.BOTTOM],
leftPadding=self.TEXT_MARGIN,
bottomPadding=self.TEXT_MARGIN,
rightPadding=self.TEXT_MARGIN,
topPadding=self.TEXT_MARGIN,
)
# DEBUG
# front_frame.drawBoundary(canvas)
title_paragraph = self._get_title_paragraph()
# Nasty hack alert!
# There is no way to know how big the text will be and Frame only
# supports top to bottom layout. This means we have no way of
# knowing the maximum image size.
#
# As a hack to get around this, we have to:
# 1. mock out the paragraphs drawOn method
# 2. "draw" the paragraph
# 3. Calculate how tall it was
# 4. Reset the frame and restore the original drawOn
def mock(*args, **kwargs):
pass
original_drawOn = title_paragraph.drawOn
title_paragraph.drawOn = mock
result = front_frame.add(title_paragraph, canvas)
if not result:
raise Exception("Failed to draw title in front frame")
title_height = (front_frame.y1 + front_frame.height - front_frame._y +
self.TEXT_MARGIN)
title_paragraph.drawOn = original_drawOn
front_frame._reset()
available_height = front_frame.height - title_height - self.TEXT_MARGIN * 2
image_width, image_height = get_image_size(
self.front_image_path,
front_frame.width,
available_height,
)
elements = []
# Add spacer if image doesn't fully fill frame
space = front_frame.height - (image_height + title_height)
if space > 0:
elements.append(Spacer(front_frame.width, space / 2))
elements.append(Image(self.front_image_path, image_width,
image_height))
# Add second spacer
if space > 0:
elements.append(Spacer(front_frame.width, space / 2))
elements.append(title_paragraph)
front_frame.addFromList(elements, canvas)