本文整理汇总了Python中calibre.gui2.library.caches.ThumbnailCache.insert方法的典型用法代码示例。如果您正苦于以下问题：Python ThumbnailCache.insert方法的具体用法？Python ThumbnailCache.insert怎么用？Python ThumbnailCache.insert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.gui2.library.caches.ThumbnailCache的用法示例。
在下文中一共展示了ThumbnailCache.insert方法的2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: GridView
# 需要导入模块: from calibre.gui2.library.caches import ThumbnailCache [as 别名]
# 或者: from calibre.gui2.library.caches.ThumbnailCache import insert [as 别名]
#.........这里部分代码省略.........
else:
has_cover, cdata, timestamp = self.model().db.new_api.cover_or_cache(book_id, timestamp)
if has_cover and cdata is None:
# The cached cover is fresh
cdata = tcdata
use_cache = True
if has_cover:
p = QImage()
p.loadFromData(cdata, CACHE_FORMAT if cdata is tcdata else 'JPEG')
p.setDevicePixelRatio(dpr)
if p.isNull() and cdata is tcdata:
# Invalid image in cache
self.thumbnail_cache.invalidate((book_id,))
self.update_item.emit(book_id)
return
cdata = None if p.isNull() else p
if not use_cache: # cache is stale
if cdata is not None:
width, height = p.width(), p.height()
scaled, nwidth, nheight = fit_image(
width, height, page_width, page_height)
if scaled:
if self.ignore_render_requests.is_set():
return
p = p.scaled(nwidth, nheight, Qt.IgnoreAspectRatio, Qt.SmoothTransformation)
p.setDevicePixelRatio(dpr)
cdata = p
# update cache
if cdata is None:
self.thumbnail_cache.invalidate((book_id,))
else:
try:
self.thumbnail_cache.insert(book_id, timestamp, image_to_data(cdata))
except EncodeError as err:
self.thumbnail_cache.invalidate((book_id,))
prints(err)
except Exception:
import traceback
traceback.print_exc()
elif tcdata is not None:
# Cover was removed, but it exists in cache, remove from cache
self.thumbnail_cache.invalidate((book_id,))
self.delegate.cover_cache.set(book_id, cdata)
self.update_item.emit(book_id)
def re_render(self, book_id):
self.delegate.cover_cache.clear_staging()
m = self.model()
try:
index = m.db.row(book_id)
except (IndexError, ValueError, KeyError):
return
self.update(m.index(index, 0))
def shutdown(self):
self.ignore_render_requests.set()
self.delegate.render_queue.put(None)
self.thumbnail_cache.shutdown()
def set_database(self, newdb, stage=0):
if stage == 0:
self.ignore_render_requests.set()
try:
for x in (self.delegate.cover_cache, self.thumbnail_cache):
self.model().db.new_api.remove_cover_cache(x)示例2: GridView
# 需要导入模块: from calibre.gui2.library.caches import ThumbnailCache [as 别名]
# 或者: from calibre.gui2.library.caches.ThumbnailCache import insert [as 别名]
#.........这里部分代码省略.........
return
tcdata, timestamp = self.thumbnail_cache[book_id]
use_cache = False
if timestamp is None:
# Not in cache
has_cover, cdata, timestamp = self.model().db.new_api.cover_or_cache(book_id, 0)
else:
has_cover, cdata, timestamp = self.model().db.new_api.cover_or_cache(book_id, timestamp)
if has_cover and cdata is None:
# The cached cover is fresh
cdata = tcdata
use_cache = True
if has_cover:
p = QImage()
p.loadFromData(cdata, CACHE_FORMAT if cdata is tcdata else 'JPEG')
dpr = self.device_pixel_ratio
p.setDevicePixelRatio(dpr)
if p.isNull() and cdata is tcdata:
# Invalid image in cache
self.thumbnail_cache.invalidate((book_id,))
self.update_item.emit(book_id)
return
cdata = None if p.isNull() else p
if not use_cache: # cache is stale
if cdata is not None:
width, height = p.width(), p.height()
scaled, nwidth, nheight = fit_image(
width, height, int(dpr * self.delegate.cover_size.width()), int(dpr * self.delegate.cover_size.height()))
if scaled:
if self.ignore_render_requests.is_set():
return
p = p.scaled(nwidth, nheight, Qt.IgnoreAspectRatio, Qt.SmoothTransformation)
p.setDevicePixelRatio(dpr)
cdata = p
# update cache
if cdata is None:
self.thumbnail_cache.invalidate((book_id,))
else:
try:
self.thumbnail_cache.insert(book_id, timestamp, image_to_data(cdata))
except EncodeError as err:
self.thumbnail_cache.invalidate((book_id,))
prints(err)
except Exception:
import traceback
traceback.print_exc()
elif tcdata is not None:
# Cover was removed, but it exists in cache, remove from cache
self.thumbnail_cache.invalidate((book_id,))
self.delegate.cover_cache.set(book_id, cdata)
self.update_item.emit(book_id)
def re_render(self, book_id):
self.delegate.cover_cache.clear_staging()
m = self.model()
try:
index = m.db.row(book_id)
except (IndexError, ValueError, KeyError):
return
self.update(m.index(index, 0))
def shutdown(self):
self.ignore_render_requests.set()
self.delegate.render_queue.put(None)
self.thumbnail_cache.shutdown()
def set_database(self, newdb, stage=0):
if stage == 0:
self.ignore_render_requests.set()
try:
for x in (self.delegate.cover_cache, self.thumbnail_cache):
self.model().db.new_api.remove_cover_cache(x)
except AttributeError:
pass # db is None
for x in (self.delegate.cover_cache, self.thumbnail_cache):
newdb.new_api.add_cover_cache(x)
try:
# Use a timeout so that if, for some reason, the render thread
# gets stuck, we dont deadlock, future covers wont get
# rendered, but this is better than a deadlock
join_with_timeout(self.delegate.render_queue)
except RuntimeError:
print ('Cover rendering thread is stuck!')
finally:
self.ignore_render_requests.clear()
else:
self.delegate.cover_cache.clear()
def select_rows(self, rows):
sel = QItemSelection()
sm = self.selectionModel()
m = self.model()
# Create a range based selector for each set of contiguous rows
# as supplying selectors for each individual row causes very poor
# performance if a large number of rows has to be selected.
for k, g in itertools.groupby(enumerate(rows), lambda (i,x):i-x):
group = list(map(operator.itemgetter(1), g))
sel.merge(QItemSelection(m.index(min(group), 0), m.index(max(group), 0)), sm.Select)
sm.select(sel, sm.ClearAndSelect)