[Oxygen] [Bug 348790] oxygen-transparent kf5 fails to compile against modern KDE Frameworks

[Christoph Feck]

https://bugs.kde.org/show_bug.cgi?id=348790

Christoph Feck  changed:

   What|Removed |Added

 Status|UNCONFIRMED |RESOLVED
 Resolution|--- |UNMAINTAINED

--- Comment #7 from Christoph Feck  ---
oxygen-transparent is unmaintained.

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[Oxygen] [Bug 348790] oxygen-transparent kf5 fails to compile against modern KDE Frameworks

[Alexander Mentyu]

https://bugs.kde.org/show_bug.cgi?id=348790

Alexander Mentyu  changed:

   What|Removed |Added

 CC||notux...@gmail.com

--- Comment #6 from Alexander Mentyu  ---
Is this issue still relevant?

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[Oxygen] [Bug 348790] oxygen-transparent kf5 fails to compile against modern KDE Frameworks

[Ruslan Kabatsayev via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=348790

--- Comment #5 from Ruslan Kabatsayev  ---
OK, the winId problem is also easy to solve: it's enough to send
QEvent::ScreenChangeInternal to the widget. So the proof of concept is here
(this is fourth commit in the series, see actual code inside the #if-#endif or
parent commits to see how it works):
https://github.com/10110111/k4oxygen/commit/5e21080da0eb72a33ec007681d303733dc69b99e

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[Oxygen] [Bug 348790] oxygen-transparent kf5 fails to compile against modern KDE Frameworks

[Ruslan Kabatsayev via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=348790

--- Comment #4 from Ruslan Kabatsayev  ---
In fact, it doesn't have to be done using UB:

struct Hack : QWindow
{
static void recreateWindow(QWindow* w)
{
w->destroy();
w->create();
}
};

The problem remains though that widget->winId() and widget->internalWinId() no
longer match widget->windowHandle()->winId(). This means that all the other
helpers like BlurHelper should use the latter. This also means that the
integrity of QWidget is now somewhat broken, and the behavior can be hard to
predict.

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[Oxygen] [Bug 348790] oxygen-transparent kf5 fails to compile against modern KDE Frameworks

[Ruslan Kabatsayev via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=348790

Ruslan Kabatsayev  changed:

   What|Removed |Added

 CC||b7.10110...@gmail.com

--- Comment #3 from Ruslan Kabatsayev  ---
DIRTY_HACK_BEGIN
You can force re-creation of the X11 window if you find a way to reliably call
protected members QWindow::destroy() and QWindow::create(). Here's an example
with undefined behavior, but which is almost guaranteed to work (and does work
in my experiments):

struct Hack : QWindow
{
void doRecreate() { destroy(); create(); }
};
// ...
widget->setAttribute( Qt::WA_TranslucentBackground );
// Apply the flag (has UB, but works)
if(widget->windowHandle())
static_cast(widget->windowHandle())->doRecreate();

This makes it somewhat work when I try this on K4Oxygen [1]. Somewhat because
for some reason blur and other properties are not preserved, although I think
this is fixable.

[1]:
https://github.com/10110111/k4oxygen/commit/ff0960d241fdd79cfa5f5c85de51316ae303e7d2

Yes, I love hacks :D

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