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Type: Bug
Resolution: Done
Priority: P1: Critical
Fix Version/s: 5.9, 5.10
Affects Version/s: 5.10.0 Beta 1
Component/s: Widgets: Itemviews
Labels:
- Reported_by_support_1H18
- Reported_by_support_standard
Environment:
This bug is not present in 5.9.1, it is also not present in 5.10 downloaded using the MintanenceTool

see attached srcreen-shot

Commits:
d5a11a0ec206f6b9e7fd50b37717ca820d6ab98a, 3adfcbf1ed9b63c3ce41d7417658db3836fd3530

Compile attached project (tbltest.zip) using Qt from current 5.10 branch, I've tested it on commit 1bba397539edbfb6a4212fe0cafbeb4ca703666a.
Run application and change any column size using mouse
Click on any column header to sort column
You will see, that manually resized column width is reset to its original size.

- - Sort By Name
  - Sort By Date
  - Ascending
  - Descending
  - Thumbnails
  - List

tbltest.zip
6 kB
26 Dec '17 18:19
1.png
41 kB
26 Dec '17 18:21

is duplicated by

QTBUG-67156 endResetModel resets column widths in the QTableView

Closed

QTBUG-66245 Regression: Sorting QTableView columns resets their size

Closed

QTBUG-67131 Column width being reset unexpected in QTableView

Closed

QTBUG-67625 QTreeView grows in wide after sorting

Closed

is required for

QTBUG-66884 Reg[5.10-5.10.1]Repeated call of layoutAboutToBeChanged() leads to crash

Closed

relates to

QTBUG-66951 [REG: 5.10.0->5.10.1]: If vertical scrollbar is not visible while QTreeWidget is being sorted, the horizontal size of the items area is expanded with each sort

Closed

(1 relates to)

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For Gerrit Dashboard: QTBUG-65478
#	Subject	Branch	Project	Status	CR	V
215401,3	Revert "QTreeView: Make sure QHeaderView is notified on layoutChanged()"	5.9.4	qt/qtbase	Status: MERGED	+2	0
217463,10	QHeaderView: properly restore section data after layoutChanged()	5.9	qt/qtbase	Status: MERGED	-2	0
220444,2	QHeaderView: properly restore hidden section size on layoutChanged()	5.11	qt/qtbase	Status: MERGED	-1	0
220567,5	QHeaderView: Preserve settings on layoutChange with empty model	5.11	qt/qtbase	Status: MERGED	+2	0
221198,2	QHeaderView: properly restore hidden section size on layoutChanged()	5.9	qt/qtbase	Status: MERGED	+2	0
221199,2	QHeaderView: Preserve settings on layoutChange with empty model	5.9	qt/qtbase	Status: MERGED	+2	0
221703,5	QHeaderView: Fix crash in layout about to change	5.11	qt/qtbase	Status: MERGED	+2	0
221872,2	QHeaderView: Fix crash in layout about to change	5.9	qt/qtbase	Status: MERGED	+2	0