def __init__(self, parent=None):
QListWidget.__init__(self, parent)
self.setAlternatingRowColors(True)
self.setStyleSheet('QListView::item { padding: 0.5ex }')
self.setContextMenuPolicy(Qt.ContextMenuPolicy.ActionsContextMenu)
self.ac_edit = ac = QAction(QIcon(I('edit_input.png')), _('Rename this bookmark'), self)
self.addAction(ac)
self.ac_delete = ac = QAction(QIcon(I('trash.png')), _('Remove this bookmark'), self)
self.addAction(ac)
self.gesture_manager = GestureManager(self)
self.setVerticalScrollMode(QAbstractItemView.ScrollMode.ScrollPerPixel)
def __init__(self, *args):
QTreeView.__init__(self, *args)
self.setFocusPolicy(Qt.FocusPolicy.NoFocus)
self.delegate = Delegate(self)
self.setItemDelegate(self.delegate)
self.setMinimumWidth(80)
self.header().close()
self.setMouseTracking(True)
self.set_style_sheet()
self.setContextMenuPolicy(Qt.ContextMenuPolicy.CustomContextMenu)
self.context_menu = None
self.customContextMenuRequested.connect(self.show_context_menu)
QApplication.instance().palette_changed.connect(
self.set_style_sheet, type=Qt.ConnectionType.QueuedConnection)
self.setVerticalScrollMode(QAbstractItemView.ScrollMode.ScrollPerPixel)
self.gesture_manager = GestureManager(self)
def __init__(self, parent=None):
QTreeWidget.__init__(self, parent)
self.setContextMenuPolicy(Qt.ContextMenuPolicy.CustomContextMenu)
self.customContextMenuRequested.connect(self.show_context_menu)
self.default_decoration = QIcon(I('blank.png'))
self.setHeaderHidden(True)
self.num_of_items = 0
self.setSelectionMode(QAbstractItemView.SelectionMode.ExtendedSelection)
set_no_activate_on_click(self)
self.itemActivated.connect(self.item_activated)
self.currentItemChanged.connect(self.current_item_changed)
self.uuid_map = {}
self.section_font = QFont(self.font())
self.section_font.setItalic(True)
self.gesture_manager = GestureManager(self)
self.setVerticalScrollMode(QAbstractItemView.ScrollMode.ScrollPerPixel)
def __init__(self, parent=None):
QTreeWidget.__init__(self, parent)
self.setHeaderHidden(True)
self.setFocusPolicy(Qt.FocusPolicy.NoFocus)
self.delegate = ResultsDelegate(self)
self.setItemDelegate(self.delegate)
self.itemClicked.connect(self.item_activated)
self.blank_icon = QIcon(I('blank.png'))
self.not_found_icon = QIcon(I('dialog_warning.png'))
self.currentItemChanged.connect(self.current_item_changed)
self.section_font = QFont(self.font())
self.section_font.setItalic(True)
self.section_map = {}
self.search_results = []
self.item_map = {}
self.gesture_manager = GestureManager(self)
self.setVerticalScrollMode(QAbstractItemView.ScrollMode.ScrollPerPixel)
def __init__(self, parent):
QListView.__init__(self, parent)
self._ncols = None
self.gesture_manager = GestureManager(self)
setup_dnd_interface(self)
self.setUniformItemSizes(True)
self.setWrapping(True)
self.setFlow(QListView.Flow.LeftToRight)
# We cannot set layout mode to batched, because that breaks
# restore_vpos()
# self.setLayoutMode(QListView.ResizeMode.Batched)
self.setResizeMode(QListView.ResizeMode.Adjust)
self.setSelectionMode(
QAbstractItemView.SelectionMode.ExtendedSelection)
self.setVerticalScrollMode(QAbstractItemView.ScrollMode.ScrollPerPixel)
self.delegate = CoverDelegate(self)
self.delegate.animation.valueChanged.connect(
self.animation_value_changed)
self.delegate.animation.finished.connect(self.animation_done)
self.setItemDelegate(self.delegate)
self.setSpacing(self.delegate.spacing)
self.set_color()
self.ignore_render_requests = Event()
dpr = self.device_pixel_ratio
self.thumbnail_cache = ThumbnailCache(
max_size=gprefs['cover_grid_disk_cache_size'],
thumbnail_size=(int(dpr * self.delegate.cover_size.width()),
int(dpr * self.delegate.cover_size.height())))
self.render_thread = None
self.update_item.connect(self.re_render,
type=Qt.ConnectionType.QueuedConnection)
self.doubleClicked.connect(self.double_clicked)
self.setCursor(Qt.CursorShape.PointingHandCursor)
self.gui = parent
self.context_menu = None
self.update_timer = QTimer(self)
self.update_timer.setInterval(200)
self.update_timer.timeout.connect(self.update_viewport)
self.update_timer.setSingleShot(True)
self.resize_timer = t = QTimer(self)
t.setInterval(200), t.setSingleShot(True)
t.timeout.connect(self.update_memory_cover_cache_size)
def __init__(self, parent):
QListView.__init__(self, parent)
self._ncols = None
self.gesture_manager = GestureManager(self)
setup_dnd_interface(self)
self.setUniformItemSizes(True)
self.setWrapping(True)
self.setFlow(self.LeftToRight)
# We cannot set layout mode to batched, because that breaks
# restore_vpos()
# self.setLayoutMode(self.Batched)
self.setResizeMode(self.Adjust)
self.setSelectionMode(self.ExtendedSelection)
self.setVerticalScrollMode(self.ScrollPerPixel)
self.delegate = CoverDelegate(self)
self.delegate.animation.valueChanged.connect(self.animation_value_changed)
self.delegate.animation.finished.connect(self.animation_done)
self.setItemDelegate(self.delegate)
self.setSpacing(self.delegate.spacing)
self.set_color()
self.ignore_render_requests = Event()
dpr = self.device_pixel_ratio
self.thumbnail_cache = ThumbnailCache(max_size=gprefs['cover_grid_disk_cache_size'],
thumbnail_size=(int(dpr * self.delegate.cover_size.width()), int(dpr * self.delegate.cover_size.height())))
self.render_thread = None
self.update_item.connect(self.re_render, type=Qt.QueuedConnection)
self.doubleClicked.connect(self.double_clicked)
self.setCursor(Qt.PointingHandCursor)
self.gui = parent
self.context_menu = None
self.update_timer = QTimer(self)
self.update_timer.setInterval(200)
self.update_timer.timeout.connect(self.update_viewport)
self.update_timer.setSingleShot(True)
self.resize_timer = t = QTimer(self)
t.setInterval(200), t.setSingleShot(True)
t.timeout.connect(self.update_memory_cover_cache_size)
class GridView(QListView):
update_item = pyqtSignal(object)
files_dropped = pyqtSignal(object)
books_dropped = pyqtSignal(object)
def __init__(self, parent):
QListView.__init__(self, parent)
self._ncols = None
self.gesture_manager = GestureManager(self)
setup_dnd_interface(self)
self.setUniformItemSizes(True)
self.setWrapping(True)
self.setFlow(self.LeftToRight)
# We cannot set layout mode to batched, because that breaks
# restore_vpos()
# self.setLayoutMode(self.Batched)
self.setResizeMode(self.Adjust)
self.setSelectionMode(self.ExtendedSelection)
self.setVerticalScrollMode(self.ScrollPerPixel)
self.delegate = CoverDelegate(self)
self.delegate.animation.valueChanged.connect(self.animation_value_changed)
self.delegate.animation.finished.connect(self.animation_done)
self.setItemDelegate(self.delegate)
self.setSpacing(self.delegate.spacing)
self.set_color()
self.ignore_render_requests = Event()
dpr = self.device_pixel_ratio
self.thumbnail_cache = ThumbnailCache(max_size=gprefs['cover_grid_disk_cache_size'],
thumbnail_size=(int(dpr * self.delegate.cover_size.width()), int(dpr * self.delegate.cover_size.height())))
self.render_thread = None
self.update_item.connect(self.re_render, type=Qt.QueuedConnection)
self.doubleClicked.connect(self.double_clicked)
self.setCursor(Qt.PointingHandCursor)
self.gui = parent
self.context_menu = None
self.update_timer = QTimer(self)
self.update_timer.setInterval(200)
self.update_timer.timeout.connect(self.update_viewport)
self.update_timer.setSingleShot(True)
self.resize_timer = t = QTimer(self)
t.setInterval(200), t.setSingleShot(True)
t.timeout.connect(self.update_memory_cover_cache_size)
def viewportEvent(self, ev):
try:
ret = self.gesture_manager.handle_event(ev)
except AttributeError:
ret = None
if ret is not None:
return ret
return QListView.viewportEvent(self, ev)
@property
def device_pixel_ratio(self):
try:
return self.devicePixelRatioF()
except AttributeError:
return self.devicePixelRatio()
@property
def first_visible_row(self):
geom = self.viewport().geometry()
for y in range(geom.top(), (self.spacing()*2) + geom.top(), 5):
for x in range(geom.left(), (self.spacing()*2) + geom.left(), 5):
ans = self.indexAt(QPoint(x, y)).row()
if ans > -1:
return ans
@property
def last_visible_row(self):
geom = self.viewport().geometry()
for y in range(geom.bottom(), geom.bottom() - 2 * self.spacing(), -5):
for x in range(geom.left(), (self.spacing()*2) + geom.left(), 5):
ans = self.indexAt(QPoint(x, y)).row()
if ans > -1:
item_width = self.delegate.item_size.width() + 2*self.spacing()
return ans + (geom.width() // item_width)
def update_viewport(self):
self.ignore_render_requests.clear()
self.update_timer.stop()
m = self.model()
for r in range(self.first_visible_row or 0, self.last_visible_row or (m.count() - 1)):
self.update(m.index(r, 0))
def start_view_animation(self, index):
d = self.delegate
if d.animating is None and not config['disable_animations']:
d.animating = index
d.animation.start()
def double_clicked(self, index):
self.start_view_animation(index)
if tweaks['doubleclick_on_library_view'] == 'open_viewer':
self.gui.iactions['View'].view_triggered(index)
elif tweaks['doubleclick_on_library_view'] in {'edit_metadata', 'edit_cell'}:
self.gui.iactions['Edit Metadata'].edit_metadata(False, False)
def animation_value_changed(self, value):
if self.delegate.animating is not None:
self.update(self.delegate.animating)
def animation_done(self):
if self.delegate.animating is not None:
idx = self.delegate.animating
self.delegate.animating = None
self.update(idx)
def set_color(self):
r, g, b = gprefs['cover_grid_color']
pal = QPalette()
col = QColor(r, g, b)
pal.setColor(pal.Base, col)
tex = gprefs['cover_grid_texture']
if tex:
from calibre.gui2.preferences.texture_chooser import texture_path
path = texture_path(tex)
if path:
pm = QPixmap(path)
if not pm.isNull():
val = pm.scaled(1, 1).toImage().pixel(0, 0)
r, g, b = qRed(val), qGreen(val), qBlue(val)
pal.setBrush(pal.Base, QBrush(pm))
dark = (r + g + b)/3.0 < 128
pal.setColor(pal.Text, QColor(Qt.white if dark else Qt.black))
self.setPalette(pal)
self.delegate.highlight_color = pal.color(pal.Text)
def refresh_settings(self):
size_changed = (
gprefs['cover_grid_width'] != self.delegate.original_width or gprefs['cover_grid_height'] != self.delegate.original_height
)
if (size_changed or gprefs[
'cover_grid_show_title'] != self.delegate.original_show_title or gprefs[
'show_emblems'] != self.delegate.original_show_emblems or gprefs[
'emblem_size'] != self.delegate.orginal_emblem_size or gprefs[
'emblem_position'] != self.delegate.orginal_emblem_position):
self.delegate.set_dimensions()
self.setSpacing(self.delegate.spacing)
if size_changed:
self.delegate.cover_cache.clear()
if gprefs['cover_grid_spacing'] != self.delegate.original_spacing:
self.delegate.calculate_spacing()
self.setSpacing(self.delegate.spacing)
self.set_color()
self.set_thumbnail_cache_image_size()
cs = gprefs['cover_grid_disk_cache_size']
if (cs*(1024**2)) != self.thumbnail_cache.max_size:
self.thumbnail_cache.set_size(cs)
self.update_memory_cover_cache_size()
def set_thumbnail_cache_image_size(self):
dpr = self.device_pixel_ratio
self.thumbnail_cache.set_thumbnail_size(
int(dpr * self.delegate.cover_size.width()), int(dpr*self.delegate.cover_size.height()))
def resizeEvent(self, ev):
self._ncols = None
self.resize_timer.start()
return QListView.resizeEvent(self, ev)
def update_memory_cover_cache_size(self):
try:
sz = self.delegate.item_size
except AttributeError:
return
rows, cols = self.width() // sz.width(), self.height() // sz.height()
num = (rows + 1) * (cols + 1)
limit = max(100, num * max(2, gprefs['cover_grid_cache_size_multiple']))
if limit != self.delegate.cover_cache.limit:
self.delegate.cover_cache.set_limit(limit)
def shown(self):
self.update_memory_cover_cache_size()
if self.render_thread is None:
self.thumbnail_cache.set_database(self.gui.current_db)
self.render_thread = Thread(target=self.render_covers)
self.render_thread.daemon = True
self.render_thread.start()
def render_covers(self):
q = self.delegate.render_queue
while True:
book_id = q.get()
try:
if book_id is None:
return
if self.ignore_render_requests.is_set():
continue
try:
self.render_cover(book_id)
except:
import traceback
traceback.print_exc()
finally:
q.task_done()
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 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[0]-i_x[1]):
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)
def selectAll(self):
# We re-implement this to ensure that only indexes from column 0 are
# selected. The base class implementation selects all columns. This
# causes problems with selection syncing, see
# https://bugs.launchpad.net/bugs/1236348
m = self.model()
sm = self.selectionModel()
sel = QItemSelection(m.index(0, 0), m.index(m.rowCount(QModelIndex())-1, 0))
sm.select(sel, sm.ClearAndSelect)
def set_current_row(self, row):
sm = self.selectionModel()
sm.setCurrentIndex(self.model().index(row, 0), sm.NoUpdate)
def set_context_menu(self, menu):
self.context_menu = menu
def contextMenuEvent(self, event):
if self.context_menu is None:
return
from calibre.gui2.main_window import clone_menu
m = clone_menu(self.context_menu) if islinux else self.context_menu
m.popup(event.globalPos())
event.accept()
def get_selected_ids(self):
m = self.model()
return [m.id(i) for i in self.selectionModel().selectedIndexes()]
def restore_vpos(self, vpos):
self.verticalScrollBar().setValue(vpos)
def restore_hpos(self, hpos):
pass
def handle_mouse_press_event(self, ev):
if QApplication.keyboardModifiers() & Qt.ShiftModifier:
# Shift-Click in QListView is broken. It selects extra items in
# various circumstances, for example, click on some item in the
# middle of a row then click on an item in the next row, all items
# in the first row will be selected instead of only items after the
# middle item.
index = self.indexAt(ev.pos())
if not index.isValid():
return
ci = self.currentIndex()
sm = self.selectionModel()
sm.setCurrentIndex(index, sm.NoUpdate)
if not ci.isValid():
return
if not sm.hasSelection():
sm.select(index, sm.ClearAndSelect)
return
cr = ci.row()
tgt = index.row()
top = self.model().index(min(cr, tgt), 0)
bottom = self.model().index(max(cr, tgt), 0)
sm.select(QItemSelection(top, bottom), sm.Select)
else:
return QListView.mousePressEvent(self, ev)
def indices_for_merge(self, resolved=True):
return self.selectionModel().selectedIndexes()
def number_of_columns(self):
# Number of columns currently visible in the grid
if self._ncols is None:
step = max(10, self.spacing())
for y in range(step, 500, step):
for x in range(step, 500, step):
i = self.indexAt(QPoint(x, y))
if i.isValid():
for x in range(self.viewport().width() - step, self.viewport().width() - 300, -step):
j = self.indexAt(QPoint(x, y))
if j.isValid():
self._ncols = j.row() - i.row() + 1
return self._ncols
return self._ncols
def keyPressEvent(self, ev):
if handle_enter_press(self, ev, self.start_view_animation, False):
return
k = ev.key()
if ev.modifiers() & Qt.ShiftModifier and k in (Qt.Key_Left, Qt.Key_Right, Qt.Key_Up, Qt.Key_Down):
ci = self.currentIndex()
if not ci.isValid():
return
c = ci.row()
delta = {Qt.Key_Left: -1, Qt.Key_Right: 1, Qt.Key_Up: -self.number_of_columns(), Qt.Key_Down: self.number_of_columns()}[k]
n = max(0, min(c + delta, self.model().rowCount(None) - 1))
if n == c:
return
sm = self.selectionModel()
rows = {i.row() for i in sm.selectedIndexes()}
if rows:
mi, ma = min(rows), max(rows)
end = mi if c == ma else ma if c == mi else c
else:
end = c
top = self.model().index(min(n, end), 0)
bottom = self.model().index(max(n, end), 0)
sm.select(QItemSelection(top, bottom), sm.ClearAndSelect)
sm.setCurrentIndex(self.model().index(n, 0), sm.NoUpdate)
else:
return QListView.keyPressEvent(self, ev)
@property
def current_book(self):
ci = self.currentIndex()
if ci.isValid():
try:
return self.model().db.data.index_to_id(ci.row())
except (IndexError, ValueError, KeyError, TypeError, AttributeError):
pass
def current_book_state(self):
return self.current_book
def restore_current_book_state(self, state):
book_id = state
self.setFocus(Qt.OtherFocusReason)
try:
row = self.model().db.data.id_to_index(book_id)
except (IndexError, ValueError, KeyError, TypeError, AttributeError):
return
self.set_current_row(row)
self.select_rows((row,))
self.scrollTo(self.model().index(row, 0), self.PositionAtCenter)
def marked_changed(self, old_marked, current_marked):
changed = old_marked | current_marked
m = self.model()
for book_id in changed:
try:
self.update(m.index(m.db.data.id_to_index(book_id), 0))
except ValueError:
pass
def moveCursor(self, action, modifiers):
index = QListView.moveCursor(self, action, modifiers)
if action in (QListView.MoveLeft, QListView.MoveRight) and index.isValid():
ci = self.currentIndex()
if ci.isValid() and index.row() == ci.row():
nr = index.row() + (1 if action == QListView.MoveRight else -1)
if 0 <= nr < self.model().rowCount(QModelIndex()):
index = self.model().index(nr, 0)
return index
def selectionCommand(self, index, event):
if event and event.type() == event.KeyPress and event.key() in (Qt.Key_Home, Qt.Key_End) and event.modifiers() & Qt.CTRL:
return QItemSelectionModel.ClearAndSelect | QItemSelectionModel.Rows
return super(GridView, self).selectionCommand(index, event)
def wheelEvent(self, ev):
if ev.phase() not in (Qt.ScrollUpdate, 0):
return
number_of_pixels = ev.pixelDelta()
number_of_degrees = ev.angleDelta() / 8.0
b = self.verticalScrollBar()
if number_of_pixels.isNull() or islinux:
# pixelDelta() is broken on linux with wheel mice
dy = number_of_degrees.y() / 15.0
# Scroll by approximately half a row
dy = int(math.ceil((dy) * b.singleStep() / 2.0))
else:
dy = number_of_pixels.y()
if abs(dy) > 0:
b.setValue(b.value() - dy)
def paintEvent(self, ev):
dpr = self.device_pixel_ratio
page_width = int(dpr * self.delegate.cover_size.width())
page_height = int(dpr * self.delegate.cover_size.height())
size_changed = self.thumbnail_cache.set_thumbnail_size(page_width, page_height)
if size_changed:
self.delegate.cover_cache.clear()
return super(GridView, self).paintEvent(ev)
class GridView(QListView):
update_item = pyqtSignal(object)
files_dropped = pyqtSignal(object)
books_dropped = pyqtSignal(object)
def __init__(self, parent):
QListView.__init__(self, parent)
self._ncols = None
self.gesture_manager = GestureManager(self)
setup_dnd_interface(self)
self.setUniformItemSizes(True)
self.setWrapping(True)
self.setFlow(self.LeftToRight)
# We cannot set layout mode to batched, because that breaks
# restore_vpos()
# self.setLayoutMode(self.Batched)
self.setResizeMode(self.Adjust)
self.setSelectionMode(self.ExtendedSelection)
self.setVerticalScrollMode(self.ScrollPerPixel)
self.delegate = CoverDelegate(self)
self.delegate.animation.valueChanged.connect(self.animation_value_changed)
self.delegate.animation.finished.connect(self.animation_done)
self.setItemDelegate(self.delegate)
self.setSpacing(self.delegate.spacing)
self.set_color()
self.ignore_render_requests = Event()
dpr = self.device_pixel_ratio
self.thumbnail_cache = ThumbnailCache(max_size=gprefs['cover_grid_disk_cache_size'],
thumbnail_size=(int(dpr * self.delegate.cover_size.width()), int(dpr * self.delegate.cover_size.height())))
self.render_thread = None
self.update_item.connect(self.re_render, type=Qt.QueuedConnection)
self.doubleClicked.connect(self.double_clicked)
self.setCursor(Qt.PointingHandCursor)
self.gui = parent
self.context_menu = None
self.update_timer = QTimer(self)
self.update_timer.setInterval(200)
self.update_timer.timeout.connect(self.update_viewport)
self.update_timer.setSingleShot(True)
self.resize_timer = t = QTimer(self)
t.setInterval(200), t.setSingleShot(True)
t.timeout.connect(self.update_memory_cover_cache_size)
def viewportEvent(self, ev):
try:
ret = self.gesture_manager.handle_event(ev)
except AttributeError:
ret = None
if ret is not None:
return ret
return QListView.viewportEvent(self, ev)
@property
def device_pixel_ratio(self):
try:
return self.devicePixelRatioF()
except AttributeError:
return self.devicePixelRatio()
@property
def first_visible_row(self):
geom = self.viewport().geometry()
for y in range(geom.top(), (self.spacing()*2) + geom.top(), 5):
for x in range(geom.left(), (self.spacing()*2) + geom.left(), 5):
ans = self.indexAt(QPoint(x, y)).row()
if ans > -1:
return ans
@property
def last_visible_row(self):
geom = self.viewport().geometry()
for y in range(geom.bottom(), geom.bottom() - 2 * self.spacing(), -5):
for x in range(geom.left(), (self.spacing()*2) + geom.left(), 5):
ans = self.indexAt(QPoint(x, y)).row()
if ans > -1:
item_width = self.delegate.item_size.width() + 2*self.spacing()
return ans + (geom.width() // item_width)
def update_viewport(self):
self.ignore_render_requests.clear()
self.update_timer.stop()
m = self.model()
for r in range(self.first_visible_row or 0, self.last_visible_row or (m.count() - 1)):
self.update(m.index(r, 0))
def start_view_animation(self, index):
d = self.delegate
if d.animating is None and not config['disable_animations']:
d.animating = index
d.animation.start()
def double_clicked(self, index):
self.start_view_animation(index)
if tweaks['doubleclick_on_library_view'] == 'open_viewer':
self.gui.iactions['View'].view_triggered(index)
elif tweaks['doubleclick_on_library_view'] in {'edit_metadata', 'edit_cell'}:
self.gui.iactions['Edit Metadata'].edit_metadata(False, False)
def animation_value_changed(self, value):
if self.delegate.animating is not None:
self.update(self.delegate.animating)
def animation_done(self):
if self.delegate.animating is not None:
idx = self.delegate.animating
self.delegate.animating = None
self.update(idx)
def set_color(self):
r, g, b = gprefs['cover_grid_color']
tex = gprefs['cover_grid_texture']
pal = self.palette()
pal.setColor(pal.Base, QColor(r, g, b))
self.setPalette(pal)
ss = ''
if tex:
from calibre.gui2.preferences.texture_chooser import texture_path
path = texture_path(tex)
if path:
path = os.path.abspath(path).replace(os.sep, '/')
ss += 'background-image: url({});'.format(path)
ss += 'background-attachment: fixed;'
pm = QPixmap(path)
if not pm.isNull():
val = pm.scaled(1, 1).toImage().pixel(0, 0)
r, g, b = qRed(val), qGreen(val), qBlue(val)
dark = max(r, g, b) < 115
ss += 'color: {};'.format('white' if dark else 'black')
self.delegate.highlight_color = QColor(Qt.white if dark else Qt.black)
self.setStyleSheet('QListView {{ {} }}'.format(ss))
def refresh_settings(self):
size_changed = (
gprefs['cover_grid_width'] != self.delegate.original_width or gprefs['cover_grid_height'] != self.delegate.original_height
)
if (size_changed or gprefs[
'cover_grid_show_title'] != self.delegate.original_show_title or gprefs[
'show_emblems'] != self.delegate.original_show_emblems or gprefs[
'emblem_size'] != self.delegate.orginal_emblem_size or gprefs[
'emblem_position'] != self.delegate.orginal_emblem_position):
self.delegate.set_dimensions()
self.setSpacing(self.delegate.spacing)
if size_changed:
self.delegate.cover_cache.clear()
if gprefs['cover_grid_spacing'] != self.delegate.original_spacing:
self.delegate.calculate_spacing()
self.setSpacing(self.delegate.spacing)
self.set_color()
self.set_thumbnail_cache_image_size()
cs = gprefs['cover_grid_disk_cache_size']
if (cs*(1024**2)) != self.thumbnail_cache.max_size:
self.thumbnail_cache.set_size(cs)
self.update_memory_cover_cache_size()
def set_thumbnail_cache_image_size(self):
dpr = self.device_pixel_ratio
self.thumbnail_cache.set_thumbnail_size(
int(dpr * self.delegate.cover_size.width()), int(dpr*self.delegate.cover_size.height()))
def resizeEvent(self, ev):
self._ncols = None
self.resize_timer.start()
return QListView.resizeEvent(self, ev)
def update_memory_cover_cache_size(self):
try:
sz = self.delegate.item_size
except AttributeError:
return
rows, cols = self.width() // sz.width(), self.height() // sz.height()
num = (rows + 1) * (cols + 1)
limit = max(100, num * max(2, gprefs['cover_grid_cache_size_multiple']))
if limit != self.delegate.cover_cache.limit:
self.delegate.cover_cache.set_limit(limit)
def shown(self):
self.update_memory_cover_cache_size()
if self.render_thread is None:
self.thumbnail_cache.set_database(self.gui.current_db)
self.render_thread = Thread(target=self.render_covers)
self.render_thread.daemon = True
self.render_thread.start()
def render_covers(self):
q = self.delegate.render_queue
while True:
book_id = q.get()
try:
if book_id is None:
return
if self.ignore_render_requests.is_set():
continue
try:
self.render_cover(book_id)
except:
import traceback
traceback.print_exc()
finally:
q.task_done()
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 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[0]-i_x[1]):
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)
def selectAll(self):
# We re-implement this to ensure that only indexes from column 0 are
# selected. The base class implementation selects all columns. This
# causes problems with selection syncing, see
# https://bugs.launchpad.net/bugs/1236348
m = self.model()
sm = self.selectionModel()
sel = QItemSelection(m.index(0, 0), m.index(m.rowCount(QModelIndex())-1, 0))
sm.select(sel, sm.ClearAndSelect)
def set_current_row(self, row):
sm = self.selectionModel()
sm.setCurrentIndex(self.model().index(row, 0), sm.NoUpdate)
def set_context_menu(self, menu):
self.context_menu = menu
def contextMenuEvent(self, event):
if self.context_menu is None:
return
from calibre.gui2.main_window import clone_menu
m = clone_menu(self.context_menu) if islinux else self.context_menu
m.popup(event.globalPos())
event.accept()
def get_selected_ids(self):
m = self.model()
return [m.id(i) for i in self.selectionModel().selectedIndexes()]
def restore_vpos(self, vpos):
self.verticalScrollBar().setValue(vpos)
def restore_hpos(self, hpos):
pass
def handle_mouse_press_event(self, ev):
if QApplication.keyboardModifiers() & Qt.ShiftModifier:
# Shift-Click in QListView is broken. It selects extra items in
# various circumstances, for example, click on some item in the
# middle of a row then click on an item in the next row, all items
# in the first row will be selected instead of only items after the
# middle item.
index = self.indexAt(ev.pos())
if not index.isValid():
return
ci = self.currentIndex()
sm = self.selectionModel()
sm.setCurrentIndex(index, sm.NoUpdate)
if not ci.isValid():
return
if not sm.hasSelection():
sm.select(index, sm.ClearAndSelect)
return
cr = ci.row()
tgt = index.row()
top = self.model().index(min(cr, tgt), 0)
bottom = self.model().index(max(cr, tgt), 0)
sm.select(QItemSelection(top, bottom), sm.Select)
else:
return QListView.mousePressEvent(self, ev)
def indices_for_merge(self, resolved=True):
return self.selectionModel().selectedIndexes()
def number_of_columns(self):
# Number of columns currently visible in the grid
if self._ncols is None:
dpr = self.device_pixel_ratio
width = int(dpr * self.delegate.cover_size.width())
height = int(dpr * self.delegate.cover_size.height())
step = max(10, self.spacing())
for y in range(step, 2 * height, step):
for x in range(step, 2 * width, step):
i = self.indexAt(QPoint(x, y))
if i.isValid():
for x in range(self.viewport().width() - step, self.viewport().width() - width, -step):
j = self.indexAt(QPoint(x, y))
if j.isValid():
self._ncols = j.row() - i.row() + 1
return self._ncols
return self._ncols
def keyPressEvent(self, ev):
if handle_enter_press(self, ev, self.start_view_animation, False):
return
k = ev.key()
if ev.modifiers() & Qt.ShiftModifier and k in (Qt.Key_Left, Qt.Key_Right, Qt.Key_Up, Qt.Key_Down):
ci = self.currentIndex()
if not ci.isValid():
return
c = ci.row()
ncols = self.number_of_columns() or 1
delta = {Qt.Key_Left: -1, Qt.Key_Right: 1, Qt.Key_Up: -ncols, Qt.Key_Down: ncols}[k]
n = max(0, min(c + delta, self.model().rowCount(None) - 1))
if n == c:
return
sm = self.selectionModel()
rows = {i.row() for i in sm.selectedIndexes()}
if rows:
mi, ma = min(rows), max(rows)
end = mi if c == ma else ma if c == mi else c
else:
end = c
top = self.model().index(min(n, end), 0)
bottom = self.model().index(max(n, end), 0)
sm.select(QItemSelection(top, bottom), sm.ClearAndSelect)
sm.setCurrentIndex(self.model().index(n, 0), sm.NoUpdate)
else:
return QListView.keyPressEvent(self, ev)
@property
def current_book(self):
ci = self.currentIndex()
if ci.isValid():
try:
return self.model().db.data.index_to_id(ci.row())
except (IndexError, ValueError, KeyError, TypeError, AttributeError):
pass
def current_book_state(self):
return self.current_book
def restore_current_book_state(self, state):
book_id = state
self.setFocus(Qt.OtherFocusReason)
try:
row = self.model().db.data.id_to_index(book_id)
except (IndexError, ValueError, KeyError, TypeError, AttributeError):
return
self.set_current_row(row)
self.select_rows((row,))
self.scrollTo(self.model().index(row, 0), self.PositionAtCenter)
def marked_changed(self, old_marked, current_marked):
changed = old_marked | current_marked
m = self.model()
for book_id in changed:
try:
self.update(m.index(m.db.data.id_to_index(book_id), 0))
except ValueError:
pass
def moveCursor(self, action, modifiers):
index = QListView.moveCursor(self, action, modifiers)
if action in (QListView.MoveLeft, QListView.MoveRight) and index.isValid():
ci = self.currentIndex()
if ci.isValid() and index.row() == ci.row():
nr = index.row() + (1 if action == QListView.MoveRight else -1)
if 0 <= nr < self.model().rowCount(QModelIndex()):
index = self.model().index(nr, 0)
return index
def selectionCommand(self, index, event):
if event and event.type() == event.KeyPress and event.key() in (Qt.Key_Home, Qt.Key_End) and event.modifiers() & Qt.CTRL:
return QItemSelectionModel.ClearAndSelect | QItemSelectionModel.Rows
return super(GridView, self).selectionCommand(index, event)
def wheelEvent(self, ev):
if ev.phase() not in (Qt.ScrollUpdate, 0):
return
number_of_pixels = ev.pixelDelta()
number_of_degrees = ev.angleDelta() / 8.0
b = self.verticalScrollBar()
if number_of_pixels.isNull() or islinux:
# pixelDelta() is broken on linux with wheel mice
dy = number_of_degrees.y() / 15.0
# Scroll by approximately half a row
dy = int(math.ceil((dy) * b.singleStep() / 2.0))
else:
dy = number_of_pixels.y()
if abs(dy) > 0:
b.setValue(b.value() - dy)
def paintEvent(self, ev):
dpr = self.device_pixel_ratio
page_width = int(dpr * self.delegate.cover_size.width())
page_height = int(dpr * self.delegate.cover_size.height())
size_changed = self.thumbnail_cache.set_thumbnail_size(page_width, page_height)
if size_changed:
self.delegate.cover_cache.clear()
return super(GridView, self).paintEvent(ev)
class Results(QTreeWidget): # {{{
show_search_result = pyqtSignal(object)
current_result_changed = pyqtSignal(object)
count_changed = pyqtSignal(object)
def __init__(self, parent=None):
QTreeWidget.__init__(self, parent)
self.setHeaderHidden(True)
self.setFocusPolicy(Qt.FocusPolicy.NoFocus)
self.delegate = ResultsDelegate(self)
self.setItemDelegate(self.delegate)
self.itemClicked.connect(self.item_activated)
self.blank_icon = QIcon(I('blank.png'))
self.not_found_icon = QIcon(I('dialog_warning.png'))
self.currentItemChanged.connect(self.current_item_changed)
self.section_font = QFont(self.font())
self.section_font.setItalic(True)
self.section_map = {}
self.search_results = []
self.item_map = {}
self.gesture_manager = GestureManager(self)
self.setVerticalScrollMode(QAbstractItemView.ScrollMode.ScrollPerPixel)
def viewportEvent(self, ev):
try:
ret = self.gesture_manager.handle_event(ev)
except AttributeError:
ret = None
if ret is not None:
return ret
return super().viewportEvent(ev)
def current_item_changed(self, current, previous):
if current is not None:
r = current.data(0, SEARCH_RESULT_ROLE)
if isinstance(r, SearchResult):
self.current_result_changed.emit(r)
else:
self.current_result_changed.emit(None)
def add_result(self, result):
section_title = _('Unknown')
section_id = -1
toc_nodes = getattr(result, 'toc_nodes', ()) or ()
if toc_nodes:
section_title = toc_nodes[-1].get('title') or _('Unknown')
section_id = toc_nodes[-1].get('id')
if section_id is None:
section_id = -1
section_key = section_id
section = self.section_map.get(section_key)
spine_idx = getattr(result, 'spine_idx', -1)
if section is None:
section = QTreeWidgetItem([section_title], 1)
section.setFlags(Qt.ItemFlag.ItemIsEnabled)
section.setFont(0, self.section_font)
section.setData(0, SPINE_IDX_ROLE, spine_idx)
lines = []
for i, node in enumerate(toc_nodes):
lines.append('\xa0\xa0' * i + '➤ ' +
(node.get('title') or _('Unknown')))
if lines:
tt = ngettext('Table of Contents section:',
'Table of Contents sections:', len(lines))
tt += '\n' + '\n'.join(lines)
section.setToolTip(0, tt)
self.section_map[section_key] = section
for s in range(self.topLevelItemCount()):
ti = self.topLevelItem(s)
if ti.data(0, SPINE_IDX_ROLE) > spine_idx:
self.insertTopLevelItem(s, section)
break
else:
self.addTopLevelItem(section)
section.setExpanded(True)
item = QTreeWidgetItem(section, [' '], 2)
item.setFlags(Qt.ItemFlag.ItemIsSelectable | Qt.ItemFlag.ItemIsEnabled
| Qt.ItemFlag.ItemNeverHasChildren)
item.setData(0, SEARCH_RESULT_ROLE, result)
item.setData(0, RESULT_NUMBER_ROLE, len(self.search_results))
item.setData(0, SPINE_IDX_ROLE, spine_idx)
if isinstance(result, SearchResult):
tt = '<p>…' + escape(result.before, False) + '<b>' + escape(
result.text, False) + '</b>' + escape(result.after,
False) + '…'
item.setData(0, Qt.ItemDataRole.ToolTipRole, tt)
item.setIcon(0, self.blank_icon)
self.item_map[len(self.search_results)] = item
self.search_results.append(result)
n = self.number_of_results
self.count_changed.emit(n)
def item_activated(self):
i = self.currentItem()
if i:
sr = i.data(0, SEARCH_RESULT_ROLE)
if isinstance(sr, SearchResult):
if not sr.is_hidden:
self.show_search_result.emit(sr)
def find_next(self, previous):
if self.number_of_results < 1:
return
item = self.currentItem()
if item is None:
return
i = int(item.data(0, RESULT_NUMBER_ROLE))
i += -1 if previous else 1
i %= self.number_of_results
self.setCurrentItem(self.item_map[i])
self.item_activated()
def search_result_not_found(self, sr):
for i in range(self.number_of_results):
item = self.item_map[i]
r = item.data(0, SEARCH_RESULT_ROLE)
if r.is_result(sr):
r.is_hidden = True
item.setIcon(0, self.not_found_icon)
break
def search_result_discovered(self, sr):
q = sr['result_num']
for i in range(self.number_of_results):
item = self.item_map[i]
r = item.data(0, SEARCH_RESULT_ROLE)
if r.result_num == q:
self.setCurrentItem(item)
@property
def current_result_is_hidden(self):
item = self.currentItem()
if item is not None:
sr = item.data(0, SEARCH_RESULT_ROLE)
if isinstance(sr, SearchResult) and sr.is_hidden:
return True
return False
@property
def number_of_results(self):
return len(self.search_results)
def clear_all_results(self):
self.section_map = {}
self.item_map = {}
self.search_results = []
self.clear()
self.count_changed.emit(-1)
def select_first_result(self):
if self.number_of_results:
item = self.item_map[0]
self.setCurrentItem(item)
def ensure_current_result_visible(self):
item = self.currentItem()
if item is not None:
self.scrollToItem(item)
class GridView(QListView):
update_item = pyqtSignal(object)
files_dropped = pyqtSignal(object)
def __init__(self, parent):
QListView.__init__(self, parent)
self._ncols = None
self.gesture_manager = GestureManager(self)
setup_dnd_interface(self)
self.setUniformItemSizes(True)
self.setWrapping(True)
self.setFlow(self.LeftToRight)
# We cannot set layout mode to batched, because that breaks
# restore_vpos()
# self.setLayoutMode(self.Batched)
self.setResizeMode(self.Adjust)
self.setSelectionMode(self.ExtendedSelection)
self.setVerticalScrollMode(self.ScrollPerPixel)
self.delegate = CoverDelegate(self)
self.delegate.animation.valueChanged.connect(
self.animation_value_changed)
self.delegate.animation.finished.connect(self.animation_done)
self.setItemDelegate(self.delegate)
self.setSpacing(self.delegate.spacing)
self.set_color()
self.ignore_render_requests = Event()
dpr = self.device_pixel_ratio
self.thumbnail_cache = ThumbnailCache(
max_size=gprefs['cover_grid_disk_cache_size'],
thumbnail_size=(int(dpr * self.delegate.cover_size.width()),
int(dpr * self.delegate.cover_size.height())))
self.render_thread = None
self.update_item.connect(self.re_render, type=Qt.QueuedConnection)
self.doubleClicked.connect(self.double_clicked)
self.setCursor(Qt.PointingHandCursor)
self.gui = parent
self.context_menu = None
self.update_timer = QTimer(self)
self.update_timer.setInterval(200)
self.update_timer.timeout.connect(self.update_viewport)
self.update_timer.setSingleShot(True)
self.resize_timer = t = QTimer(self)
t.setInterval(200), t.setSingleShot(True)
t.timeout.connect(self.update_memory_cover_cache_size)
def viewportEvent(self, ev):
try:
ret = self.gesture_manager.handle_event(ev)
except AttributeError:
ret = None
if ret is not None:
return ret
return QListView.viewportEvent(self, ev)
@property
def device_pixel_ratio(self):
try:
return self.devicePixelRatioF()
except AttributeError:
return self.devicePixelRatio()
@property
def first_visible_row(self):
geom = self.viewport().geometry()
for y in xrange(geom.top(), (self.spacing() * 2) + geom.top(), 5):
for x in xrange(geom.left(), (self.spacing() * 2) + geom.left(),
5):
ans = self.indexAt(QPoint(x, y)).row()
if ans > -1:
return ans
@property
def last_visible_row(self):
geom = self.viewport().geometry()
for y in xrange(geom.bottom(), geom.bottom() - 2 * self.spacing(), -5):
for x in xrange(geom.left(), (self.spacing() * 2) + geom.left(),
5):
ans = self.indexAt(QPoint(x, y)).row()
if ans > -1:
item_width = self.delegate.item_size.width(
) + 2 * self.spacing()
return ans + (geom.width() // item_width)
def update_viewport(self):
self.ignore_render_requests.clear()
self.update_timer.stop()
m = self.model()
for r in xrange(self.first_visible_row or 0, self.last_visible_row
or (m.count() - 1)):
self.update(m.index(r, 0))
def start_view_animation(self, index):
d = self.delegate
if d.animating is None and not config['disable_animations']:
d.animating = index
d.animation.start()
def double_clicked(self, index):
self.start_view_animation(index)
if tweaks['doubleclick_on_library_view'] == 'open_viewer':
self.gui.iactions['View'].view_triggered(index)
elif tweaks['doubleclick_on_library_view'] in {
'edit_metadata', 'edit_cell'
}:
self.gui.iactions['Edit Metadata'].edit_metadata(False, False)
def animation_value_changed(self, value):
if self.delegate.animating is not None:
self.update(self.delegate.animating)
def animation_done(self):
if self.delegate.animating is not None:
idx = self.delegate.animating
self.delegate.animating = None
self.update(idx)
def set_color(self):
r, g, b = gprefs['cover_grid_color']
pal = QPalette()
col = QColor(r, g, b)
pal.setColor(pal.Base, col)
tex = gprefs['cover_grid_texture']
if tex:
from calibre.gui2.preferences.texture_chooser import texture_path
path = texture_path(tex)
if path:
pm = QPixmap(path)
if not pm.isNull():
val = pm.scaled(1, 1).toImage().pixel(0, 0)
r, g, b = qRed(val), qGreen(val), qBlue(val)
pal.setBrush(pal.Base, QBrush(pm))
dark = (r + g + b) / 3.0 < 128
pal.setColor(pal.Text, QColor(Qt.white if dark else Qt.black))
self.setPalette(pal)
self.delegate.highlight_color = pal.color(pal.Text)
def refresh_settings(self):
size_changed = (
gprefs['cover_grid_width'] != self.delegate.original_width
or gprefs['cover_grid_height'] != self.delegate.original_height)
if (size_changed or gprefs['cover_grid_show_title'] !=
self.delegate.original_show_title or
gprefs['show_emblems'] != self.delegate.original_show_emblems
or gprefs['emblem_size'] != self.delegate.orginal_emblem_size
or gprefs['emblem_position'] !=
self.delegate.orginal_emblem_position):
self.delegate.set_dimensions()
self.setSpacing(self.delegate.spacing)
if size_changed:
self.delegate.cover_cache.clear()
if gprefs['cover_grid_spacing'] != self.delegate.original_spacing:
self.delegate.calculate_spacing()
self.setSpacing(self.delegate.spacing)
self.set_color()
if size_changed:
dpr = self.device_pixel_ratio
self.thumbnail_cache.set_thumbnail_size(
int(dpr * self.delegate.cover_size.width()),
int(dpr * self.delegate.cover_size.height()))
cs = gprefs['cover_grid_disk_cache_size']
if (cs * (1024**2)) != self.thumbnail_cache.max_size:
self.thumbnail_cache.set_size(cs)
self.update_memory_cover_cache_size()
def resizeEvent(self, ev):
self._ncols = None
self.resize_timer.start()
return QListView.resizeEvent(self, ev)
def update_memory_cover_cache_size(self):
try:
sz = self.delegate.item_size
except AttributeError:
return
rows, cols = self.width() // sz.width(), self.height() // sz.height()
num = (rows + 1) * (cols + 1)
limit = max(100,
num * max(2, gprefs['cover_grid_cache_size_multiple']))
if limit != self.delegate.cover_cache.limit:
self.delegate.cover_cache.set_limit(limit)
def shown(self):
self.update_memory_cover_cache_size()
if self.render_thread is None:
self.thumbnail_cache.set_database(self.gui.current_db)
self.render_thread = Thread(target=self.render_covers)
self.render_thread.daemon = True
self.render_thread.start()
def render_covers(self):
q = self.delegate.render_queue
while True:
book_id = q.get()
try:
if book_id is None:
return
if self.ignore_render_requests.is_set():
continue
try:
self.render_cover(book_id)
except:
import traceback
traceback.print_exc()
finally:
q.task_done()
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 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)
class TOCView(QTreeView):
searched = pyqtSignal(object)
def __init__(self, *args):
QTreeView.__init__(self, *args)
self.setFocusPolicy(Qt.FocusPolicy.NoFocus)
self.delegate = Delegate(self)
self.setItemDelegate(self.delegate)
self.setMinimumWidth(80)
self.header().close()
self.setMouseTracking(True)
self.set_style_sheet()
self.setContextMenuPolicy(Qt.ContextMenuPolicy.CustomContextMenu)
self.context_menu = None
self.customContextMenuRequested.connect(self.show_context_menu)
QApplication.instance().palette_changed.connect(
self.set_style_sheet, type=Qt.ConnectionType.QueuedConnection)
self.setVerticalScrollMode(QAbstractItemView.ScrollMode.ScrollPerPixel)
self.gesture_manager = GestureManager(self)
def viewportEvent(self, ev):
try:
ret = self.gesture_manager.handle_event(ev)
except AttributeError:
ret = None
if ret is not None:
return ret
return super().viewportEvent(ev)
def setModel(self, model):
QTreeView.setModel(self, model)
model.current_toc_nodes_changed.connect(
self.current_toc_nodes_changed,
type=Qt.ConnectionType.QueuedConnection)
def current_toc_nodes_changed(self, ancestors, nodes):
if ancestors:
self.auto_expand_indices(ancestors)
if nodes:
self.scrollTo(nodes[-1].index())
def auto_expand_indices(self, indices):
for idx in indices:
self.setExpanded(idx, True)
def set_style_sheet(self):
self.setStyleSheet('''
QTreeView {
background-color: palette(window);
color: palette(window-text);
border: none;
}
QTreeView::item {
border: 1px solid transparent;
padding-top:0.5ex;
padding-bottom:0.5ex;
}
QTreeView::item:hover {
background: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1, stop: 0 #e7effd, stop: 1 #cbdaf1);
color: black;
border: 1px solid #bfcde4;
border-radius: 6px;
}
''')
def mouseMoveEvent(self, ev):
if self.indexAt(ev.pos()).isValid():
self.setCursor(Qt.CursorShape.PointingHandCursor)
else:
self.unsetCursor()
return QTreeView.mouseMoveEvent(self, ev)
def expand_tree(self, index):
self.expand(index)
i = -1
while True:
i += 1
child = index.child(i, 0)
if not child.isValid():
break
self.expand_tree(child)
def collapse_at_level(self, index):
item = self.model().itemFromIndex(index)
for x in self.model().items_at_depth(item.depth):
self.collapse(self.model().indexFromItem(x))
def expand_at_level(self, index):
item = self.model().itemFromIndex(index)
for x in self.model().items_at_depth(item.depth):
self.expand(self.model().indexFromItem(x))
def show_context_menu(self, pos):
index = self.indexAt(pos)
m = QMenu(self)
if index.isValid():
m.addAction(QIcon.ic('plus.png'),
_('Expand all items under %s') % index.data(),
partial(self.expand_tree, index))
m.addSeparator()
m.addAction(QIcon.ic('plus.png'), _('Expand all items'),
self.expandAll)
m.addAction(QIcon.ic('minus.png'), _('Collapse all items'),
self.collapseAll)
m.addSeparator()
if index.isValid():
m.addAction(
QIcon.ic('plus.png'),
_('Expand all items at the level of {}').format(index.data()),
partial(self.expand_at_level, index))
m.addAction(
QIcon.ic('minus.png'),
_('Collapse all items at the level of {}').format(
index.data()), partial(self.collapse_at_level, index))
m.addSeparator()
m.addAction(QIcon.ic('edit-copy.png'),
_('Copy Table of Contents to clipboard'),
self.copy_to_clipboard)
self.context_menu = m
m.exec(self.mapToGlobal(pos))
def copy_to_clipboard(self):
m = self.model()
QApplication.clipboard().setText(getattr(m, 'as_plain_text', ''))
def update_current_toc_nodes(self, families):
self.model().update_current_toc_nodes(families)
def scroll_to_current_toc_node(self):
try:
nodes = self.model().viewed_nodes()
except AttributeError:
nodes = ()
if nodes:
self.scrollTo(nodes[-1].index())
class BookmarksList(QListWidget):
changed = pyqtSignal()
bookmark_activated = pyqtSignal(object)
def __init__(self, parent=None):
QListWidget.__init__(self, parent)
self.setAlternatingRowColors(True)
self.setStyleSheet('QListView::item { padding: 0.5ex }')
self.setContextMenuPolicy(Qt.ContextMenuPolicy.ActionsContextMenu)
self.ac_edit = ac = QAction(QIcon(I('edit_input.png')), _('Rename this bookmark'), self)
self.addAction(ac)
self.ac_delete = ac = QAction(QIcon(I('trash.png')), _('Remove this bookmark'), self)
self.addAction(ac)
self.gesture_manager = GestureManager(self)
self.setVerticalScrollMode(QAbstractItemView.ScrollMode.ScrollPerPixel)
def viewportEvent(self, ev):
try:
ret = self.gesture_manager.handle_event(ev)
except AttributeError:
ret = None
if ret is not None:
return ret
return super().viewportEvent(ev)
@property
def current_non_removed_item(self):
ans = self.currentItem()
if ans is not None:
bm = ans.data(Qt.ItemDataRole.UserRole)
if not bm.get('removed'):
return ans
def keyPressEvent(self, ev):
if ev.key() in (Qt.Key.Key_Enter, Qt.Key.Key_Return):
i = self.current_non_removed_item
if i is not None:
self.bookmark_activated.emit(i)
ev.accept()
return
if ev.key() in (Qt.Key.Key_Delete, Qt.Key.Key_Backspace):
i = self.current_non_removed_item
if i is not None:
self.ac_delete.trigger()
ev.accept()
return
return QListWidget.keyPressEvent(self, ev)
def activate_related_bookmark(self, delta=1):
if not self.count():
return
items = [self.item(r) for r in range(self.count())]
row = self.currentRow()
current_item = items[row]
items = [i for i in items if not i.isHidden()]
count = len(items)
if not count:
return
row = items.index(current_item)
nrow = (row + delta + count) % count
self.setCurrentItem(items[nrow])
self.bookmark_activated.emit(self.currentItem())
def next_bookmark(self):
self.activate_related_bookmark()
def previous_bookmark(self):
self.activate_related_bookmark(-1)
class Highlights(QTreeWidget):
jump_to_highlight = pyqtSignal(object)
current_highlight_changed = pyqtSignal(object)
delete_requested = pyqtSignal()
edit_requested = pyqtSignal()
edit_notes_requested = pyqtSignal()
def __init__(self, parent=None):
QTreeWidget.__init__(self, parent)
self.setContextMenuPolicy(Qt.ContextMenuPolicy.CustomContextMenu)
self.customContextMenuRequested.connect(self.show_context_menu)
self.default_decoration = QIcon(I('blank.png'))
self.setHeaderHidden(True)
self.num_of_items = 0
self.setSelectionMode(QAbstractItemView.SelectionMode.ExtendedSelection)
set_no_activate_on_click(self)
self.itemActivated.connect(self.item_activated)
self.currentItemChanged.connect(self.current_item_changed)
self.uuid_map = {}
self.section_font = QFont(self.font())
self.section_font.setItalic(True)
self.gesture_manager = GestureManager(self)
self.setVerticalScrollMode(QAbstractItemView.ScrollMode.ScrollPerPixel)
def viewportEvent(self, ev):
try:
ret = self.gesture_manager.handle_event(ev)
except AttributeError:
ret = None
if ret is not None:
return ret
return super().viewportEvent(ev)
def show_context_menu(self, point):
index = self.indexAt(point)
h = index.data(Qt.ItemDataRole.UserRole)
self.context_menu = m = QMenu(self)
if h is not None:
m.addAction(QIcon(I('edit_input.png')), _('Modify this highlight'), self.edit_requested.emit)
m.addAction(QIcon(I('modified.png')), _('Edit notes for this highlight'), self.edit_notes_requested.emit)
m.addAction(QIcon(I('trash.png')), ngettext(
'Delete this highlight', 'Delete selected highlights', len(self.selectedItems())
), self.delete_requested.emit)
m.addSeparator()
m.addAction(QIcon.ic('plus.png'), _('Expand all'), self.expandAll)
m.addAction(QIcon.ic('minus.png'), _('Collapse all'), self.collapseAll)
self.context_menu.popup(self.mapToGlobal(point))
return True
def current_item_changed(self, current, previous):
self.current_highlight_changed.emit(current.data(0, Qt.ItemDataRole.UserRole) if current is not None else None)
def load(self, highlights, preserve_state=False):
s = self.style()
expanded_chapters = set()
if preserve_state:
root = self.invisibleRootItem()
for i in range(root.childCount()):
chapter = root.child(i)
if chapter.isExpanded():
expanded_chapters.add(chapter.data(0, Qt.ItemDataRole.DisplayRole))
icon_size = s.pixelMetric(QStyle.PixelMetric.PM_SmallIconSize, None, self)
dpr = self.devicePixelRatioF()
is_dark = is_dark_theme()
self.clear()
self.uuid_map = {}
highlights = (h for h in highlights if not h.get('removed') and h.get('highlighted_text'))
section_map = defaultdict(list)
section_tt_map = {}
for h in self.sorted_highlights(highlights):
tfam = h.get('toc_family_titles') or ()
if tfam:
tsec = tfam[0]
lsec = tfam[-1]
else:
tsec = h.get('top_level_section_title')
lsec = h.get('lowest_level_section_title')
sec = lsec or tsec or _('Unknown')
if len(tfam) > 1:
lines = []
for i, node in enumerate(tfam):
lines.append('\xa0\xa0' * i + '➤ ' + node)
tt = ngettext('Table of Contents section:', 'Table of Contents sections:', len(lines))
tt += '\n' + '\n'.join(lines)
section_tt_map[sec] = tt
section_map[sec].append(h)
for secnum, (sec, items) in enumerate(section_map.items()):
section = QTreeWidgetItem([sec], 1)
section.setFlags(Qt.ItemFlag.ItemIsEnabled)
section.setFont(0, self.section_font)
tt = section_tt_map.get(sec)
if tt:
section.setToolTip(0, tt)
self.addTopLevelItem(section)
section.setExpanded(not preserve_state or sec in expanded_chapters)
for itemnum, h in enumerate(items):
txt = h.get('highlighted_text')
txt = txt.replace('\n', ' ')
if h.get('notes'):
txt = '•' + txt
if len(txt) > 100:
txt = txt[:100] + '…'
item = QTreeWidgetItem(section, [txt], 2)
item.setFlags(Qt.ItemFlag.ItemIsSelectable | Qt.ItemFlag.ItemIsEnabled | Qt.ItemFlag.ItemNeverHasChildren)
item.setData(0, Qt.ItemDataRole.UserRole, h)
try:
dec = decoration_for_style(self.palette(), h.get('style') or {}, icon_size, dpr, is_dark)
except Exception:
import traceback
traceback.print_exc()
dec = None
if dec is None:
dec = self.default_decoration
item.setData(0, Qt.ItemDataRole.DecorationRole, dec)
self.uuid_map[h['uuid']] = secnum, itemnum
self.num_of_items += 1
def sorted_highlights(self, highlights):
def_idx = 999999999999999
defval = def_idx, cfi_sort_key('/99999999')
def cfi_key(h):
cfi = h.get('start_cfi')
si = h.get('spine_index', def_idx)
return (si, cfi_sort_key(cfi)) if cfi else defval
return sorted(highlights, key=cfi_key)
def refresh(self, highlights):
h = self.current_highlight
self.load(highlights, preserve_state=True)
if h is not None:
idx = self.uuid_map.get(h['uuid'])
if idx is not None:
sec_idx, item_idx = idx
self.set_current_row(sec_idx, item_idx)
def iteritems(self):
root = self.invisibleRootItem()
for i in range(root.childCount()):
sec = root.child(i)
for k in range(sec.childCount()):
yield sec.child(k)
def count(self):
return self.num_of_items
def find_query(self, query):
pat = query.regex
items = tuple(self.iteritems())
count = len(items)
cr = -1
ch = self.current_highlight
if ch:
q = ch['uuid']
for i, item in enumerate(items):
h = item.data(0, Qt.ItemDataRole.UserRole)
if h['uuid'] == q:
cr = i
if query.backwards:
if cr < 0:
cr = count
indices = chain(range(cr - 1, -1, -1), range(count - 1, cr, -1))
else:
if cr < 0:
cr = -1
indices = chain(range(cr + 1, count), range(0, cr + 1))
for i in indices:
h = items[i].data(0, Qt.ItemDataRole.UserRole)
if pat.search(h['highlighted_text']) is not None or pat.search(h.get('notes') or '') is not None:
self.set_current_row(*self.uuid_map[h['uuid']])
return True
return False
def find_annot_id(self, annot_id):
q = self.uuid_map.get(annot_id)
if q is not None:
self.set_current_row(*q)
return True
return False
def set_current_row(self, sec_idx, item_idx):
sec = self.topLevelItem(sec_idx)
if sec is not None:
item = sec.child(item_idx)
if item is not None:
self.setCurrentItem(item, 0, QItemSelectionModel.SelectionFlag.ClearAndSelect)
return True
return False
def item_activated(self, item):
h = item.data(0, Qt.ItemDataRole.UserRole)
if h is not None:
self.jump_to_highlight.emit(h)
@property
def current_highlight(self):
i = self.currentItem()
if i is not None:
return i.data(0, Qt.ItemDataRole.UserRole)
@property
def all_highlights(self):
for item in self.iteritems():
yield item.data(0, Qt.ItemDataRole.UserRole)
@property
def selected_highlights(self):
for item in self.selectedItems():
yield item.data(0, Qt.ItemDataRole.UserRole)
def keyPressEvent(self, ev):
if ev.matches(QKeySequence.StandardKey.Delete):
self.delete_requested.emit()
ev.accept()
return
if ev.key() == Qt.Key.Key_F2:
self.edit_requested.emit()
ev.accept()
return
return super().keyPressEvent(ev)
class GridView(QListView):
update_item = pyqtSignal(object)
files_dropped = pyqtSignal(object)
def __init__(self, parent):
QListView.__init__(self, parent)
self._ncols = None
self.gesture_manager = GestureManager(self)
setup_dnd_interface(self)
self.setUniformItemSizes(True)
self.setWrapping(True)
self.setFlow(self.LeftToRight)
# We cannot set layout mode to batched, because that breaks
# restore_vpos()
# self.setLayoutMode(self.Batched)
self.setResizeMode(self.Adjust)
self.setSelectionMode(self.ExtendedSelection)
self.setVerticalScrollMode(self.ScrollPerPixel)
self.delegate = CoverDelegate(self)
self.delegate.animation.valueChanged.connect(self.animation_value_changed)
self.delegate.animation.finished.connect(self.animation_done)
self.setItemDelegate(self.delegate)
self.setSpacing(self.delegate.spacing)
self.set_color()
self.ignore_render_requests = Event()
dpr = self.device_pixel_ratio
self.thumbnail_cache = ThumbnailCache(max_size=gprefs['cover_grid_disk_cache_size'],
thumbnail_size=(int(dpr * self.delegate.cover_size.width()), int(dpr * self.delegate.cover_size.height())))
self.render_thread = None
self.update_item.connect(self.re_render, type=Qt.QueuedConnection)
self.doubleClicked.connect(self.double_clicked)
self.setCursor(Qt.PointingHandCursor)
self.gui = parent
self.context_menu = None
self.update_timer = QTimer(self)
self.update_timer.setInterval(200)
self.update_timer.timeout.connect(self.update_viewport)
self.update_timer.setSingleShot(True)
self.resize_timer = t = QTimer(self)
t.setInterval(200), t.setSingleShot(True)
t.timeout.connect(self.update_memory_cover_cache_size)
def viewportEvent(self, ev):
try:
ret = self.gesture_manager.handle_event(ev)
except AttributeError:
ret = None
if ret is not None:
return ret
return QListView.viewportEvent(self, ev)
@property
def device_pixel_ratio(self):
try:
return self.devicePixelRatioF()
except AttributeError:
return self.devicePixelRatio()
@property
def first_visible_row(self):
geom = self.viewport().geometry()
for y in xrange(geom.top(), (self.spacing()*2) + geom.top(), 5):
for x in xrange(geom.left(), (self.spacing()*2) + geom.left(), 5):
ans = self.indexAt(QPoint(x, y)).row()
if ans > -1:
return ans
@property
def last_visible_row(self):
geom = self.viewport().geometry()
for y in xrange(geom.bottom(), geom.bottom() - 2 * self.spacing(), -5):
for x in xrange(geom.left(), (self.spacing()*2) + geom.left(), 5):
ans = self.indexAt(QPoint(x, y)).row()
if ans > -1:
item_width = self.delegate.item_size.width() + 2*self.spacing()
return ans + (geom.width() // item_width)
def update_viewport(self):
self.ignore_render_requests.clear()
self.update_timer.stop()
m = self.model()
for r in xrange(self.first_visible_row or 0, self.last_visible_row or (m.count() - 1)):
self.update(m.index(r, 0))
def start_view_animation(self, index):
d = self.delegate
if d.animating is None and not config['disable_animations']:
d.animating = index
d.animation.start()
def double_clicked(self, index):
self.start_view_animation(index)
if tweaks['doubleclick_on_library_view'] == 'open_viewer':
self.gui.iactions['View'].view_triggered(index)
elif tweaks['doubleclick_on_library_view'] in {'edit_metadata', 'edit_cell'}:
self.gui.iactions['Edit Metadata'].edit_metadata(False, False)
def animation_value_changed(self, value):
if self.delegate.animating is not None:
self.update(self.delegate.animating)
def animation_done(self):
if self.delegate.animating is not None:
idx = self.delegate.animating
self.delegate.animating = None
self.update(idx)
def set_color(self):
r, g, b = gprefs['cover_grid_color']
pal = QPalette()
col = QColor(r, g, b)
pal.setColor(pal.Base, col)
tex = gprefs['cover_grid_texture']
if tex:
from calibre.gui2.preferences.texture_chooser import texture_path
path = texture_path(tex)
if path:
pm = QPixmap(path)
if not pm.isNull():
val = pm.scaled(1, 1).toImage().pixel(0, 0)
r, g, b = qRed(val), qGreen(val), qBlue(val)
pal.setBrush(pal.Base, QBrush(pm))
dark = (r + g + b)/3.0 < 128
pal.setColor(pal.Text, QColor(Qt.white if dark else Qt.black))
self.setPalette(pal)
self.delegate.highlight_color = pal.color(pal.Text)
def refresh_settings(self):
size_changed = (
gprefs['cover_grid_width'] != self.delegate.original_width or
gprefs['cover_grid_height'] != self.delegate.original_height
)
if (size_changed or gprefs['cover_grid_show_title'] != self.delegate.original_show_title or
gprefs['show_emblems'] != self.delegate.original_show_emblems or
gprefs['emblem_size'] != self.delegate.orginal_emblem_size or
gprefs['emblem_position'] != self.delegate.orginal_emblem_position):
self.delegate.set_dimensions()
self.setSpacing(self.delegate.spacing)
if size_changed:
self.delegate.cover_cache.clear()
if gprefs['cover_grid_spacing'] != self.delegate.original_spacing:
self.delegate.calculate_spacing()
self.setSpacing(self.delegate.spacing)
self.set_color()
if size_changed:
dpr = self.device_pixel_ratio
self.thumbnail_cache.set_thumbnail_size(int(dpr * self.delegate.cover_size.width()), int(dpr*self.delegate.cover_size.height()))
cs = gprefs['cover_grid_disk_cache_size']
if (cs*(1024**2)) != self.thumbnail_cache.max_size:
self.thumbnail_cache.set_size(cs)
self.update_memory_cover_cache_size()
def resizeEvent(self, ev):
self._ncols = None
self.resize_timer.start()
return QListView.resizeEvent(self, ev)
def update_memory_cover_cache_size(self):
try:
sz = self.delegate.item_size
except AttributeError:
return
rows, cols = self.width() // sz.width(), self.height() // sz.height()
num = (rows + 1) * (cols + 1)
limit = max(100, num * max(2, gprefs['cover_grid_cache_size_multiple']))
if limit != self.delegate.cover_cache.limit:
self.delegate.cover_cache.set_limit(limit)
def shown(self):
self.update_memory_cover_cache_size()
if self.render_thread is None:
self.thumbnail_cache.set_database(self.gui.current_db)
self.render_thread = Thread(target=self.render_covers)
self.render_thread.daemon = True
self.render_thread.start()
def render_covers(self):
q = self.delegate.render_queue
while True:
book_id = q.get()
try:
if book_id is None:
return
if self.ignore_render_requests.is_set():
continue
try:
self.render_cover(book_id)
except:
import traceback
traceback.print_exc()
finally:
q.task_done()
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 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)
