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When refreshing rows in the book list emit fewer signals

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Kovid Goyal 2015-03-16 14:00:37 +05:30
parent d1651232a4
commit d4b737a316
1 changed files with 14 additions and 6 deletions
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20
src/calibre/gui2/library/models.py
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@ -7,6 +7,7 @@ __docformat__ = 'restructuredtext en'
import functools, re, os, traceback, errno, time
from collections import defaultdict, namedtuple
from itertools import groupby
from PyQt5.Qt import (QAbstractTableModel, Qt, pyqtSignal, QIcon, QImage,
QModelIndex, QDateTime, QColor, QPixmap, QPainter)
@ -48,6 +49,14 @@ def default_image():
_default_image = QImage(I('default_cover.png'))
return _default_image
def group_numbers(numbers):
for k, g in groupby(enumerate(sorted(numbers)), lambda (i, x):i - x):
first = None
for last in g:
if first is None:
first = last[1]
yield first, last[1]
class ColumnColor(object): # {{{
def __init__(self, formatter):
@ -302,12 +311,11 @@ class BooksModel(QAbstractTableModel): # {{{
def refresh_rows(self, rows, current_row=-1):
self._clear_caches()
for row in rows:
if row == current_row:
self.new_bookdisplay_data.emit(
self.get_book_display_info(row))
self.dataChanged.emit(self.index(row, 0), self.index(row,
self.columnCount(QModelIndex())-1))
cc = self.columnCount(QModelIndex()) - 1
for first_row, last_row in group_numbers(rows):
self.dataChanged.emit(self.index(first_row, 0), self.index(last_row, cc))
if current_row >= 0 and first_row <= current_row <= last_row:
self.new_bookdisplay_data.emit(self.get_book_display_info(current_row))
def close(self):
self.db.close()