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Fix #1864341 [Python error when trying to select several books](https://bugs.launchpad.net/calibre/+bug/1864341)

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Kovid Goyal 2020-02-23 11:42:32 +05:30
parent 8439a6b09c
commit df0dfd04de
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1 changed files with 8 additions and 4 deletions
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12
src/calibre/gui2/library/alternate_views.py
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@ -1049,12 +1049,15 @@ class GridView(QListView):
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, 500, step):
for x in range(step, 500, step):
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() - 300, -step):
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
@ -1070,7 +1073,8 @@ class GridView(QListView):
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]
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