> On Jan. 8, 2013, 11:15 p.m., Xuetian Weng wrote:
> > after I apply the patch, I notice that in some random unknnow case
> > KWindowSystem will emit the signal, while KSelectionOwner is not. (And I
> > think KSelectionOwner is correct since I didn't do anything to kwin), and I
> > notice some strange plasma theme change caused by this.
> >
> > Trying to find you why..
>
> Thomas Lübking wrote:
> The XFixesSelectionNotify event fires one every selection owner event,
> usually it'll be the cnp system (when you eg. mark text)
>
> The problem should ideally be fixed in Qt instead of working around it in
> KDE.
> Untested patch:
>
>
> diff --git a/src/gui/kernel/qapplication_x11.cpp
> b/src/gui/kernel/qapplication_x11.cpp
> index 3631f1d..644f0ad 100644
> --- a/src/gui/kernel/qapplication_x11.cpp
> +++ b/src/gui/kernel/qapplication_x11.cpp
> @@ -536,6 +536,7 @@ struct qt_xfixes_selection_event_data
> {
> // which selection to filter out.
> Atom selection;
> + Window window;
> };
>
> #if defined(Q_C_CALLBACKS)
> @@ -548,7 +549,7 @@ static Bool qt_xfixes_scanner(Display*, XEvent
> *event, XPointer arg)
> reinterpret_cast<qt_xfixes_selection_event_data*>(arg);
> if (event->type == X11->xfixes_eventbase + XFixesSelectionNotify) {
> XFixesSelectionNotifyEvent *xfixes_event =
> reinterpret_cast<XFixesSelectionNotifyEvent*>(event);
> - if (xfixes_event->selection == data->selection)
> + if (xfixes_event->selection == data->selection &&
> xfixes_event->window == data->window)
> return true;
> }
> return false;
> @@ -3462,6 +3463,7 @@ int QApplication::x11ProcessEvent(XEvent* event)
> // we don't want to handle old SelectionNotify events.
> qt_xfixes_selection_event_data xfixes_event;
> xfixes_event.selection = req->selection;
> + xfixes_event.window = req->window;
> for (XEvent ev;;) {
> if (!XCheckIfEvent(X11->display, &ev, &qt_xfixes_scanner,
> (XPointer)&xfixes_event))
> break;
>
but I don't see in near future there will be Qt 4.8.5 nor distro can pick up
this patch..
actually this can cause serious problem, clipboard is so widely used.
I guess if would be better to workaround it for now, I already notice some
strange theme change, since clipboard is being initialized by KApplication by
default..
- Xuetian
-----------------------------------------------------------
This is an automatically generated e-mail. To reply, visit:
http://git.reviewboard.kde.org/r/107983/#review25012
-----------------------------------------------------------
On Jan. 5, 2013, 5:08 p.m., Thomas Lübking wrote:
>
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> http://git.reviewboard.kde.org/r/107983/
> -----------------------------------------------------------
>
> (Updated Jan. 5, 2013, 5:08 p.m.)
>
>
> Review request for kdelibs, kwin, Plasma, Aaron J. Seigo, Marco Martin,
> Martin Gräßlin, and Fredrik Höglund.
>
>
> Description
> -------
>
> It works fine here (tested so far KWindowSystem signal, KSelectionWatcher
> only with kwin) with kwin (shift+alt+f12), xcompmgr, compiz & "metacity -c"
> and e17.
> Didn't try xfce nor mutter.
>
> Technically:
> I do not at all understand why KWindowSystem is *not* watching the root
> window - KSelectionOwner for one is sending events to the root and this also
> seems the case for all other WMs (at least everything now starts to cause the
> signal to be emitted)
>
> The KSelectionWatcher failure seems to be kwin specific (wrote me a cleaner
> testcase), there'll be some X11 event processing on top that eats away the
> client messages.
> So this one can be scratched from the patch, the KWindowSystem issue remains.
>
>
> This addresses bug 179042.
> http://bugs.kde.org/show_bug.cgi?id=179042
>
>
> Diffs
> -----
>
> kdeui/windowmanagement/kwindowsystem_x11.cpp f9b3cc1
>
> Diff: http://git.reviewboard.kde.org/r/107983/diff/
>
>
> Testing
> -------
>
> see summary
>
>
> Thanks,
>
> Thomas Lübking
>
>
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