Created attachment 105994 [details] video showing the bug Please see the attached video. Steps to reproduce: 1. Make sure your desktop layout is set to "folder view" and you have at least one folder on the desktop containing files. 2. Click the little arrow on a desktop icon to expand the folder view. 3. Move your cursor over the expanded folder view, then click the desktop. The expanded folder view will close. 4. Click and drag in empty space on the desktop to create a rectangle selection. Result: Instead of creating a rectangle selection, the icon gets dragged instead, even though the mouse cursor was nowhere near it.
I can't reproduce your conclusion, but I see a similar problem - the click-and-drag after starts a rectangle selection for me, but it also opens the folder in Dolphin as if it got a double-click pair. This is likely rooted in something related to bug 380354.
Git commit 20bf7ec11458afdf7b55d7ab2f0fe338f32d1081 by Eike Hein. Committed on 23/06/2017 at 12:59. Pushed by hein into branch 'Plasma/5.10'. Fix clicking outside of preview popups to dismiss them corrupting mouse state Summary: As a result of refactorings in 5.10, hoveredItem may not reflect the true cursor position when preview popups become involved. When inter- acting with an item's associated preview popup, it's still considered hovered. This needs to be taken into account when processing clicks, otherwise corrupted mouse state leads e.g. to inadvertendly opening a folder by clicking outside its preview popup to dismiss it. Reviewers: #plasma Subscribers: broulik, plasma-devel Tags: #plasma Differential Revision: https://phabricator.kde.org/D6247 M +13 -4 containments/desktop/package/contents/ui/FolderItemDelegate.qml M +21 -1 containments/desktop/package/contents/ui/FolderView.qml https://commits.kde.org/plasma-desktop/20bf7ec11458afdf7b55d7ab2f0fe338f32d1081