def failed_img(self):
if self._failed_img is None:
try:
dpr = self.devicePixelRatioF()
except AttributeError:
dpr = self.devicePixelRatio()
i = QImage(200, 150, QImage.Format_ARGB32)
i.setDevicePixelRatio(dpr)
i.fill(Qt.white)
p = QPainter(i)
r = i.rect().adjusted(10, 10, -10, -10)
n = QPen(Qt.DashLine)
n.setColor(Qt.black)
p.setPen(n)
p.drawRect(r)
p.setPen(Qt.black)
f = self.font()
f.setPixelSize(20)
p.setFont(f)
p.drawText(r.adjusted(10, 0, -10, 0),
Qt.AlignCenter | Qt.TextWordWrap,
_('Image could not be rendered'))
p.end()
self._failed_img = QPixmap.fromImage(i)
return self._failed_img
def render_cover(self, book_id):
if self.ignore_render_requests.is_set():
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 render_cover(self, book_id):
if self.ignore_render_requests.is_set():
return
dpr = self.device_pixel_ratio
page_width = int(dpr * self.delegate.cover_size.width())
page_height = int(dpr * self.delegate.cover_size.height())
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')
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 start_show_animation(self):
if self.rendered_pixmap is not None:
return
dpr = getattr(self, 'devicePixelRatioF', self.devicePixelRatio)()
p = QImage(dpr * self.size(), QImage.Format_ARGB32_Premultiplied)
p.setDevicePixelRatio(dpr)
self.render(p)
self.rendered_pixmap = QPixmap.fromImage(p)
self.original_visibility = v = []
for child in self.findChildren(QWidget):
if child.isVisible():
child.setVisible(False)
v.append(child)
self.show_animation.start()
def start_show_animation(self):
if self.rendered_pixmap is not None:
return
dpr = getattr(self, 'devicePixelRatioF', self.devicePixelRatio)()
p = QImage(dpr * self.size(), QImage.Format_ARGB32_Premultiplied)
p.setDevicePixelRatio(dpr)
self.render(p)
self.rendered_pixmap = QPixmap.fromImage(p)
self.original_visibility = v = []
for child in self.findChildren(QWidget):
if child.isVisible():
child.setVisible(False)
v.append(child)
self.show_animation.start()
def start_show_animation(self):
if self.rendered_pixmap is not None:
return
dpr = getattr(self, 'devicePixelRatioF', self.devicePixelRatio)()
p = QImage(dpr * self.size(), QImage.Format_ARGB32_Premultiplied)
p.setDevicePixelRatio(dpr)
# For some reason, Qt scrolls the book view when rendering this widget,
# for the very first time, so manually preserve its position
pr = getattr(self.parent(), 'library_view', None)
if not hasattr(pr, 'preserve_state'):
self.render(p)
else:
with pr.preserve_state():
self.render(p)
self.rendered_pixmap = QPixmap.fromImage(p)
self.original_visibility = v = []
for child in self.findChildren(QWidget):
if child.isVisible():
child.setVisible(False)
v.append(child)
self.show_animation.start()
def failed_img(self):
if self._failed_img is None:
try:
dpr = self.devicePixelRatioF()
except AttributeError:
dpr = self.devicePixelRatio()
i = QImage(200, 150, QImage.Format_ARGB32)
i.setDevicePixelRatio(dpr)
i.fill(Qt.white)
p = QPainter(i)
r = i.rect().adjusted(10, 10, -10, -10)
n = QPen(Qt.DashLine)
n.setColor(Qt.black)
p.setPen(n)
p.drawRect(r)
p.setPen(Qt.black)
f = self.font()
f.setPixelSize(20)
p.setFont(f)
p.drawText(r.adjusted(10, 0, -10, 0), Qt.AlignCenter | Qt.TextWordWrap, _('Image could not be rendered'))
p.end()
self._failed_img = QPixmap.fromImage(i)
return self._failed_img
def decoration_for_style(palette, style, icon_size, device_pixel_ratio,
is_dark):
style_key = (is_dark, icon_size, device_pixel_ratio,
tuple((k, style[k]) for k in sorted(style)))
sentinel = object()
ans = decoration_cache.get(style_key, sentinel)
if ans is not sentinel:
return ans
ans = None
kind = style.get('kind')
if kind == 'color':
key = 'dark' if is_dark else 'light'
val = style.get(key)
if val is None:
which = style.get('which')
val = (builtin_colors_dark
if is_dark else builtin_colors_light).get(which)
if val is None:
val = style.get('background-color')
if val is not None:
ans = QColor(val)
elif kind == 'decoration':
which = style.get('which')
if which is not None:
q = builtin_decorations.get(which)
if q is not None:
style = q
sz = int(math.ceil(icon_size * device_pixel_ratio))
canvas = QImage(sz, sz, QImage.Format.Format_ARGB32)
canvas.fill(Qt.GlobalColor.transparent)
canvas.setDevicePixelRatio(device_pixel_ratio)
p = QPainter(canvas)
p.setRenderHint(QPainter.RenderHint.Antialiasing, True)
p.setPen(palette.color(QPalette.ColorRole.WindowText))
irect = QRect(0, 0, icon_size, icon_size)
adjust = -2
text_rect = p.drawText(
irect.adjusted(0, adjust, 0, adjust),
Qt.AlignmentFlag.AlignHCenter | Qt.AlignmentFlag.AlignTop, 'a')
p.drawRect(irect)
fm = p.fontMetrics()
pen = p.pen()
if 'text-decoration-color' in style:
pen.setColor(QColor(style['text-decoration-color']))
lstyle = style.get('text-decoration-style') or 'solid'
q = {
'dotted': Qt.PenStyle.DotLine,
'dashed': Qt.PenStyle.DashLine,
}.get(lstyle)
if q is not None:
pen.setStyle(q)
lw = fm.lineWidth()
if lstyle == 'double':
lw * 2
pen.setWidth(fm.lineWidth())
q = style.get('text-decoration-line') or 'underline'
pos = text_rect.bottom()
height = irect.bottom() - pos
if q == 'overline':
pos = height
elif q == 'line-through':
pos = text_rect.center().y() - adjust - lw // 2
p.setPen(pen)
if lstyle == 'wavy':
p.drawPath(wavy_path(icon_size, height, pos))
else:
p.drawLine(0, pos, irect.right(), pos)
p.end()
ans = QPixmap.fromImage(canvas)
elif 'background-color' in style:
ans = QColor(style['background-color'])
decoration_cache[style_key] = ans
return ans
def drawIconWithShadow(self,
icon,
rect,
painter,
iconMode,
radius=3,
color=QColor(0, 0, 0, 130),
offset=QPoint(1, -2)):
'''
@brief: Draw a cached pixmap with shadow
@param: icon QIcon
@param: rect QRect
@param: painter QPainter
@param: iconMode QIcon.Mode
@param: radius int
@param: color QColor
@param: offset QPoint
'''
cache = QPixmap()
pixmapName = 'icon %s %s %s' % (icon.cacheKey(), iconMode,
rect.height())
cache = QPixmapCache.find(pixmapName)
if not cache:
px = icon.pixmap(rect.size(), iconMode)
px.setDevicePixelRatio(gVar.app.devicePixelRatio())
cache = QPixmap(px.size() + QSize(radius * 2, radius * 2))
cache.setDevicePixelRatio(px.devicePixelRatioF())
cache.fill(Qt.transparent)
cachePainter = QPainter(cache)
# Draw shadow
tmp = QImage(px.size() + QSize(radius * 2, radius * 2 + 1),
QImage.Format_ARGB32_Premultiplied)
tmp.setDevicePixelRatio(px.devicePixelRatioF())
tmp.fill(Qt.transparent)
tmpPainter = QPainter(tmp)
tmpPainter.setCompositionMode(QPainter.CompositionMode_Source)
tmpPainter.drawPixmap(QPoint(radius, radius), px)
tmpPainter.end()
# blur the alpha channel
blurred = QImage(tmp.size(), QImage.Format_ARGB32_Premultiplied)
blurred.fill(Qt.transparent)
blurPainter = QPainter(blurred)
# TODO:
#qt_blurImage(blurPainter, tmp, radius, False, True)
blurPainter.end()
tmp = blurred
# blacken the image...
tmpPainter.begin(tmp)
tmpPainter.setCompositionMode(QPainter.CompositionMode_SourceIn)
tmpPainter.fillRect(tmp.rect(), color)
tmpPainter.end()
tmpPainter.begin(tmp)
tmpPainter.setCompositionMode(QPainter.CompositionMode_SourceIn)
tmpPainter.fillRect(tmp.rect(), color)
tmpPainter.end()
# draw the blurred drop shadow...
cachePainter.drawImage(
QRect(0, 0,
cache.rect().width() / cache.devicePixelRatioF(),
cache.rect().height() / cache.devicePixelRatioF()), tmp)
# Draw the actual pixmap...
cachePainter.drawPixmap(QPoint(radius, radius) + offset, px)
if self.usePixmapCache():
QPixmapCache.insert(pixmapName, cache)
sip.delete(cachePainter)
sip.delete(tmpPainter)
sip.delete(blurPainter)
targetRect = QRect(cache.rect())
targetRect.setWidth(cache.rect().width() / cache.devicePixelRatioF())
targetRect.setHeight(cache.rect().height() / cache.devicePixelRatioF())
targetRect.moveCenter(rect.center())
painter.drawPixmap(targetRect.topLeft() - offset, cache)
