Review Request: SortFilterModel: Do not reset model while changing the regexp

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This review has been submitted with commit 03ecbc135a85939efcdc254b29becfdd0940e659 by Aurélien Gâteau to branch master.

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On May 25, 2012, 2:40 p.m., Aurélien Gâteau wrote:
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> (Updated May 25, 2012, 2:40 p.m.)
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> Review request for Plasma.
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> Description
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> SortFilterModel::setRegExp() calls beginResetModel() before setting the regexp and endResetModel() when done. This cause flickering as the QML view must refresh its entire content. QSortFilterProxyModel correctly add or remove rows when filtering, so resetting the model is not necessary.
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> Diffs
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>   plasma/declarativeimports/core/datamodel.cpp 97d129e 
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> Diff: http://git.reviewboard.kde.org/r/105042/diff/
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> Testing
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> Test script attached demonstrates the problem by having a delegate whose opacity goes from 0 to 1 when completed.
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> - Download regexp-flicker.{pro,cpp,qml}
> - run qmake ; make
> - Type in the input field => without the patch, remaining items flicker. With the patch they do not because they are not recreated.
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> Thanks,
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> Aurélien Gâteau
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