3rdparty/ext_qt/0020-Synthesize-Enter-LeaveEvent-for-accepted-QTabletEven.patch

0001 From 96d92d83b4dc6ad201da82266d5e1edfb734bb90 Mon Sep 17 00:00:00 2001
0002 From: Dmitry Kazakov <dimula73@gmail.com>
0003 Date: Mon, 11 Mar 2019 13:18:06 +0300
0004 Subject: [PATCH 03/47] Synthesize Enter/LeaveEvent for accepted QTabletEvent
0005
0006 When the tablet event is accepted, then Qt doesn't synthesize a mouse
0007 event, it means that QApplicationPrivate::sendMouseEvent() will not be
0008 called, and, therefore, enter/leave events will not be dispatched.
0009
0010 The patch looks a bit hackish. Ideally, the synthesize should happen
0011 in QGuiApplicationPrivate::processTabletEvent(), which takes the decision
0012 about synthesizing mouse events. But there is not enough information
0013 on this level: neither qt_last_mouse_receiver nor the receiver widget
0014 are known at this stage.
0015
0016 On Windows and other platforms where there is a parallel stream of
0017 mouse events synthesized by the platform, we shouldn't generate these
0018 events manually.
0019
0020 Change-Id: Ifbad6284483ee282ad129db54606f5d0d9ddd633
0021 ---
0022  src/widgets/kernel/qwidgetwindow.cpp | 12 ++++++++++++
0023  1 file changed, 12 insertions(+)
0024
0025 diff --git a/src/widgets/kernel/qwidgetwindow.cpp b/src/widgets/kernel/qwidgetwindow.cpp
0026 index e74243203a..7f1db99f60 100644
0027 --- a/src/widgets/kernel/qwidgetwindow.cpp
0028 +++ b/src/widgets/kernel/qwidgetwindow.cpp
0029 @@ -1063,6 +1063,18 @@ void QWidgetWindow::handleTabletEvent(QTabletEvent *event)
0030          event->setAccepted(ev.isAccepted());
0031      }
0032
0033 +    /**
0034 +     * Synthesize Enter/Leave events if it is requested by the system and user
0035 +     */
0036 +    if (widget != qt_last_mouse_receiver &&
0037 +        event->isAccepted() &&
0038 +        !QWindowSystemInterfacePrivate::TabletEvent::platformSynthesizesMouse &&
0039 +        qApp->testAttribute(Qt::AA_SynthesizeMouseForUnhandledTabletEvents)) {
0040 +
0041 +        QApplicationPrivate::dispatchEnterLeave(widget, qt_last_mouse_receiver, event->globalPos());
0042 +        qt_last_mouse_receiver = widget;
0043 +    }
0044 +
0045      if (event->type() == QEvent::TabletRelease && event->buttons() == Qt::NoButton)
0046          qt_tablet_target = 0;
0047  }
0048 --
0049 2.20.1.windows.1
0050