From 34db59a076dd824401f952b305a4f575b0140f79 Mon Sep 17 00:00:00 2001 From: Dmitry Kazakov Date: Mon, 11 Mar 2019 13:18:06 +0300 Subject: [PATCH 2/3] Synthesize Enter/LeaveEvent for accepted QTabletEvent When the tablet event is accepted, then Qt doesn't synthesize a mouse event, it means that QApplicationPrivate::sendMouseEvent() will not be called, and, therefore, enter/leave events will not be dispatched. The patch looks a bit hackish. Ideally, the synthesize should happen in QGuiApplicationPrivate::processTabletEvent(), which takes the decision about synthesizing mouse events. But there is not enough information on this level: neither qt_last_mouse_receiver nor the receiver widget are known at this stage. On Windows and other platforms where there is a parallel stream of mouse events synthesized by the platform, we shouldn't generate these events manually. Change-Id: Ifbad6284483ee282ad129db54606f5d0d9ddd633 --- src/widgets/kernel/qwidgetwindow.cpp | 12 ++++++++++++ 1 file changed, 12 insertions(+) Index: qtbase-everywhere-src-5.15.0-alpha/src/widgets/kernel/qwidgetwindow.cpp =================================================================== --- qtbase-everywhere-src-5.15.0-alpha.orig/src/widgets/kernel/qwidgetwindow.cpp +++ qtbase-everywhere-src-5.15.0-alpha/src/widgets/kernel/qwidgetwindow.cpp @@ -1075,6 +1075,18 @@ void QWidgetWindow::handleTabletEvent(QT event->setAccepted(ev.isAccepted()); } + /** + * Synthesize Enter/Leave events if it is requested by the system and user + */ + if (widget != qt_last_mouse_receiver && + event->isAccepted() && + !QWindowSystemInterfacePrivate::TabletEvent::platformSynthesizesMouse && + qApp->testAttribute(Qt::AA_SynthesizeMouseForUnhandledTabletEvents)) { + + QApplicationPrivate::dispatchEnterLeave(widget, qt_last_mouse_receiver, event->globalPos()); + qt_last_mouse_receiver = widget; + } + if (event->type() == QEvent::TabletRelease && event->buttons() == Qt::NoButton) qt_tablet_target = nullptr; }