Review Request 114460: Remove even more redundant data from KItemListViewLayouter

[Emmanuel Pescosta]

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Ship it!


Great idea! ;)

Works fine for me too, no regression found so far.

- Emmanuel Pescosta


On Dec. 14, 2013, 7:37 p.m., Frank Reininghaus wrote:
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> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/114460/
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> (Updated Dec. 14, 2013, 7:37 p.m.)
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> 
> Review request for Dolphin.
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> Repository: kde-baseapps
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> Description
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> After https://git.reviewboard.kde.org/r/113487/, KItemListViewLayouter still stores quite a bit of redundant data.
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> For every item, we store the coordinates of its top-left corner in a QPointF 'pos' in the ItemInfo struct. This requires
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> 2 * "number of items" doubles.
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> However, pos.x is the same for all items in one column, and pos.y is the same for all items in a row. Therefore, some memory can be saved by removing the 'pos' member, and adding two QVector<qreal>
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> m_rowOffsets and m_columnOffsets
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> instead. This reduces the memory requirement to
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> "number of rows + number of columns" doubles, which is at least 50% less.
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> Diffs
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>   dolphin/src/kitemviews/private/kitemlistviewlayouter.h a3b0893 
>   dolphin/src/kitemviews/private/kitemlistviewlayouter.cpp f5f63d5 
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> Diff: https://git.reviewboard.kde.org/r/114460/diff/
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> Testing
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> Verfified with KSysGuard that the memory consumption is reduced as expected. View layout and scrolling still seem to work OK in all view modes and with grouping enabled or disabled.
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> Thanks,
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> Frank Reininghaus
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>

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