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Edit book: Reports: Show thumbnail previews of SVG images

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Kovid Goyal 2022-01-15 13:07:20 +05:30
parent bf53bbf07a
commit 1fad7b32ab
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1 changed files with 14 additions and 16 deletions
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30
src/calibre/gui2/tweak_book/reports.py
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@ -8,7 +8,7 @@ import time, textwrap, os
from threading import Thread
from contextlib import suppress
from operator import itemgetter
from functools import partial
from functools import partial, lru_cache
from collections import defaultdict
from csv import writer as csv_writer
from io import StringIO
@ -375,7 +375,6 @@ class ImagesDelegate(QStyledItemDelegate):
def __init__(self, *args):
QStyledItemDelegate.__init__(self, *args)
self.cache = {}
def sizeHint(self, option, index):
ans = QStyledItemDelegate.sizeHint(self, option, index)
@ -383,7 +382,11 @@ class ImagesDelegate(QStyledItemDelegate):
if entry is None:
return ans
th = self.parent().thumbnail_height
width, height = min(th, entry.width), min(th, entry.height)
pmap = self.pixmap(th, entry._replace(usage=()), self.parent().devicePixelRatioF())
if pmap.isNull():
width = height = 0
else:
width, height = pmap.width(), pmap.height()
m = self.MARGIN * 2
return QSize(max(width + m, ans.width()), height + m + self.MARGIN + ans.height())
@ -394,14 +397,7 @@ class ImagesDelegate(QStyledItemDelegate):
return
painter.save()
th = self.parent().thumbnail_height
k = (th, entry.name)
pmap = self.cache.get(k)
if pmap is None:
try:
dpr = painter.device().devicePixelRatioF()
except AttributeError:
dpr = painter.device().devicePixelRatio()
pmap = self.cache[k] = self.pixmap(th, entry, dpr)
pmap = self.pixmap(th, entry._replace(usage=()), painter.device().devicePixelRatioF())
if pmap.isNull():
bottom = option.rect.top()
else:
@ -415,14 +411,16 @@ class ImagesDelegate(QStyledItemDelegate):
painter.drawText(rect, Qt.AlignmentFlag.AlignHCenter | Qt.AlignmentFlag.AlignVCenter, entry.basename)
painter.restore()
@lru_cache(maxsize=1024)
def pixmap(self, thumbnail_height, entry, dpr):
pmap = QPixmap(current_container().name_to_abspath(entry.name)) if entry.width > 0 and entry.height > 0 else QPixmap()
entry_ok = entry.width > 0 and entry.height > 0
entry_ok |= entry.mime_type == 'image/svg+xml'
pmap = QPixmap(current_container().name_to_abspath(entry.name)) if entry_ok > 0 else QPixmap()
if not pmap.isNull():
pmap.setDevicePixelRatio(dpr)
scaled, width, height = fit_image(entry.width, entry.height, thumbnail_height, thumbnail_height)
scaled, width, height = fit_image(pmap.width(), pmap.height(), thumbnail_height, thumbnail_height)
if scaled:
pmap = pmap.scaled(int(dpr * width), int(dpr * height), transformMode=Qt.TransformationMode.SmoothTransformation)
pmap.setDevicePixelRatio(dpr)
pmap = pmap.scaled(width, height, transformMode=Qt.TransformationMode.SmoothTransformation)
return pmap
@ -503,7 +501,7 @@ class ImagesWidget(QWidget):
def __call__(self, data):
self.model(data)
self.filter_edit.clear()
self.delegate.cache.clear()
self.delegate.pixmap.cache_clear()
self.files.resizeRowsToContents()
def resize_to_contents(self, *args):