Review Request 129409: Fix scrolling in dock panels

[Elvis Angelaccio]

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https://git.reviewboard.kde.org/r/129409/
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Review request for Dolphin, Emmanuel Pescosta and Martin Tobias Holmedahl Sandsmark.


Bugs: 365968
    https://bugs.kde.org/show_bug.cgi?id=365968


Repository: dolphin


Description
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The reason why scrolling is smooth in the DolphinView but not in the dock panel is: https://bugs.kde.org/show_bug.cgi?id=365968#c19

So we just need to set a default itemSize in the KStandardItemListView constructor.
The itemHeight is computed like in DolphinItemListView::updateGridSize().


Diffs
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  src/kitemviews/kstandarditemlistview.cpp 6471002c72f7a854b54d653f5248939a7861a225 

Diff: https://git.reviewboard.kde.org/r/129409/diff/


Testing
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Scroll is now smoot both in Places and Folders dock panels (with xorg-libinput). Not tested yet with xorg-evdev but it shouldn't make a difference.


Thanks,

Elvis Angelaccio

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