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Dive pictures: adjust rowDDEnd and rowDDStart on picture deletion

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In DivePictureModel, rowDDEnd and rowDDStart specify the range of
pictures in the profile plot. Obviously, these have to be adjusted
when pictures are deleted.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2018-06-28 20:11:39 +02:00 committed by Dirk Hohndel
parent d293e968e9
commit bf60d29e99
1 changed files with 14 additions and 0 deletions
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14
qt-models/divepicturemodel.cpp
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@ -138,6 +138,14 @@ static bool removePictureFromSelectedDive(const char *fileUrl)
return false;
}
// Calculate how many items of a range are before the given index
static int rangeBefore(int rangeFrom, int rangeTo, int index)
{
if (rangeTo <= rangeFrom)
return 0;
return std::min(rangeTo, index) - std::min(rangeFrom, index);
}
void DivePictureModel::removePictures(const QVector<QString> &fileUrls)
{
bool removed = false;
@ -163,6 +171,12 @@ void DivePictureModel::removePictures(const QVector<QString> &fileUrls)
beginRemoveRows(QModelIndex(), i, j - 1);
pictures.erase(pictures.begin() + i, pictures.begin() + j);
endRemoveRows();
// After removing pictures, we have to adjust rowDDStart and rowDDEnd.
// Calculate the part of the range that is before rowDDStart and rowDDEnd,
// respectively and subtract accordingly.
rowDDStart -= rangeBefore(i, j, rowDDStart);
rowDDEnd -= rangeBefore(i, j, rowDDEnd);
}
}