本文整理汇总了Python中calibre.ebooks.pdf.render.engine.PdfDevice.to_px方法的典型用法代码示例。如果您正苦于以下问题：Python PdfDevice.to_px方法的具体用法？Python PdfDevice.to_px怎么用？Python PdfDevice.to_px使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类calibre.ebooks.pdf.render.engine.PdfDevice的用法示例。
在下文中一共展示了PdfDevice.to_px方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: PDFWriter
# 需要导入模块: from calibre.ebooks.pdf.render.engine import PdfDevice [as 别名]
# 或者: from calibre.ebooks.pdf.render.engine.PdfDevice import to_px [as 别名]
class PDFWriter(QObject):
def _pass_json_value_getter(self):
val = json.dumps(self.bridge_value)
return QString(val)
def _pass_json_value_setter(self, value):
self.bridge_value = json.loads(unicode(value))
_pass_json_value = pyqtProperty(QString, fget=_pass_json_value_getter,
fset=_pass_json_value_setter)
def __init__(self, opts, log, cover_data=None, toc=None):
from calibre.gui2 import is_ok_to_use_qt
if not is_ok_to_use_qt():
raise Exception('Not OK to use Qt')
QObject.__init__(self)
self.logger = self.log = log
self.opts = opts
self.cover_data = cover_data
self.paged_js = None
self.toc = toc
self.loop = QEventLoop()
self.view = QWebView()
self.page = Page(opts, self.log)
self.view.setPage(self.page)
self.view.setRenderHints(QPainter.Antialiasing|
QPainter.TextAntialiasing|QPainter.SmoothPixmapTransform)
self.view.loadFinished.connect(self.render_html,
type=Qt.QueuedConnection)
for x in (Qt.Horizontal, Qt.Vertical):
self.view.page().mainFrame().setScrollBarPolicy(x,
Qt.ScrollBarAlwaysOff)
self.report_progress = lambda x, y: x
def dump(self, items, out_stream, pdf_metadata):
opts = self.opts
self.outline = Outline(self.toc, items)
page_size = get_page_size(self.opts)
xdpi, ydpi = self.view.logicalDpiX(), self.view.logicalDpiY()
ml, mr = opts.margin_left, opts.margin_right
margin_side = min(ml, mr)
ml, mr = ml - margin_side, mr - margin_side
self.doc = PdfDevice(out_stream, page_size=page_size, left_margin=ml,
top_margin=0, right_margin=mr, bottom_margin=0,
xdpi=xdpi, ydpi=ydpi, errors=self.log.error,
debug=self.log.debug, compress=not
opts.uncompressed_pdf)
self.page.setViewportSize(QSize(self.doc.width(), self.doc.height()))
self.render_queue = items
self.total_items = len(items)
# TODO: Test margins
mt, mb = map(self.doc.to_px, (opts.margin_top, opts.margin_bottom))
ms = self.doc.to_px(margin_side, vertical=False)
self.margin_top, self.margin_size, self.margin_bottom = map(
lambda x:int(floor(x)), (mt, ms, mb))
self.painter = QPainter(self.doc)
self.doc.set_metadata(title=pdf_metadata.title,
author=pdf_metadata.author,
tags=pdf_metadata.tags)
self.painter.save()
try:
if self.cover_data is not None:
p = QPixmap()
p.loadFromData(self.cover_data)
if not p.isNull():
draw_image_page(QRect(0, 0, self.doc.width(), self.doc.height()),
self.painter, p,
preserve_aspect_ratio=self.opts.preserve_cover_aspect_ratio)
self.doc.end_page()
finally:
self.painter.restore()
QTimer.singleShot(0, self.render_book)
self.loop.exec_()
# TODO: Outline and links
self.painter.end()
if self.doc.errors_occurred:
raise Exception('PDF Output failed, see log for details')
def render_book(self):
if self.doc.errors_occurred:
return self.loop.exit(1)
try:
if not self.render_queue:
self.loop.exit()
else:
self.render_next()
except:
self.logger.exception('Rendering failed')
self.loop.exit(1)
def render_next(self):
#.........这里部分代码省略.........