[dolphin] [Bug 440366] 'Create New' submenu disabled/enabled status does not update correctly when switching between tabs

[nttkde]

https://bugs.kde.org/show_bug.cgi?id=440366

--- Comment #3 from nttkde <watisthispoo at outlook.com> ---
I think this is because sometimes DolphinView::setActive() doesn't emit the
writeStateChanged signal. 
It seems some other call to the function at wrong time messes it up and the
signal doesn't get emitted and/or then the active==m_active ends up being equal
and returns.

Especially FocusIn event that calls it somewhere inbetween is maybe a bit sus?
If I (for the sake of testing) comment out the line "setActive(true)" in
DolphinView::eventFilter in "case QEvent::FocusIn" (dolphinview.cpp:903), the
menu seems to start working again.

There is a bug that perhaps might be related; see
https://bugs.kde.org/show_bug.cgi?id=379135 and
search/dolphinsearchbox.cpp:219.


It affects Create New submenus in the background-context menu, File menu and
the hamburger menu, since those use the same DolphinNewFileMenu/KNewFileMenu
object.
Right-click menu above a folder seems to create a separate DolphinNewFileMenu
instance and selectedItemsProperties.supportsWriting() etc are used for setting
other actions' enabled/disabled state so they're not affected.

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