From 73dafaf265a6c6a51611a093c2cc81a6d61767a9 Mon Sep 17 00:00:00 2001 From: Alexander Volkov Date: Thu, 22 Dec 2016 15:12:28 +0300 Subject: [PATCH] xcb: Ignore XI2 LMB mouse events from touch screens 157ee01a8d0be9a4dbac03883c9eaf3609fc1172 was trying to minimize some side effects of the bug in the evdev driver (https://bugs.freedesktop.org/show_bug.cgi?id=98188) by not changing mouse button state on motion. Unfortunately it resurrected bugs that were fixed by 76de1ac0a4cd384f608a14b5d77a8cf3ef1ec868. Filter out mouse events from touch screens instead. This change reverts 157ee01a8d0be9a4dbac03883c9eaf3609fc1172. Task-number: QTBUG-32609 Task-number: QTBUG-35065 Task-number: QTBUG-43776 Task-number: QTBUG-44166 Task-number: QTBUG-44231 Task-number: QTBUG-56156 Change-Id: Ie17710d94beabeb08681d669a9d8309be9b44e73 Reviewed-by: Shawn Rutledge --- src/plugins/platforms/xcb/qxcbconnection.h | 1 + .../platforms/xcb/qxcbconnection_xi2.cpp | 7 ++++ src/plugins/platforms/xcb/qxcbwindow.cpp | 32 +++++++++---------- src/plugins/platforms/xcb/qxcbwindow.h | 1 - 4 files changed, 24 insertions(+), 17 deletions(-) diff --git a/src/plugins/platforms/xcb/qxcbconnection.h b/src/plugins/platforms/xcb/qxcbconnection.h index 60f0f487c5..a9208ffe09 100644 --- a/src/plugins/platforms/xcb/qxcbconnection.h +++ b/src/plugins/platforms/xcb/qxcbconnection.h @@ -517,6 +517,7 @@ public: #ifdef XCB_USE_XINPUT22 bool xi2MouseEvents() const; + bool isTouchScreen(int id) const; #endif protected: diff --git a/src/plugins/platforms/xcb/qxcbconnection_xi2.cpp b/src/plugins/platforms/xcb/qxcbconnection_xi2.cpp index 0ace79a4f5..f4f56f25f1 100644 --- a/src/plugins/platforms/xcb/qxcbconnection_xi2.cpp +++ b/src/plugins/platforms/xcb/qxcbconnection_xi2.cpp @@ -1025,6 +1025,13 @@ Qt::MouseButton QXcbConnection::xiToQtMouseButton(uint32_t b) return Qt::NoButton; } +bool QXcbConnection::isTouchScreen(int id) const +{ + auto device = m_touchDevices.value(id); + return device && device->qtTouchDevice + && device->qtTouchDevice->type() == QTouchDevice::TouchScreen; +} + static QTabletEvent::TabletDevice toolIdToTabletDevice(quint32 toolId) { // keep in sync with wacom_intuos_inout() in Linux kernel driver wacom_wac.c switch (toolId) { diff --git a/src/plugins/platforms/xcb/qxcbwindow.cpp b/src/plugins/platforms/xcb/qxcbwindow.cpp index ff01fa019e..3204fab197 100644 --- a/src/plugins/platforms/xcb/qxcbwindow.cpp +++ b/src/plugins/platforms/xcb/qxcbwindow.cpp @@ -2423,22 +2423,27 @@ static inline int fixed1616ToInt(FP1616 val) return int((qreal(val >> 16)) + (val & 0xFFFF) / (qreal)0xFFFF); } -void QXcbWindow::handleXIMouseButtonState(const xcb_ge_event_t *event) -{ - QXcbConnection *conn = connection(); - const xXIDeviceEvent *ev = reinterpret_cast(event); - if (ev->buttons_len > 0) { - unsigned char *buttonMask = (unsigned char *) &ev[1]; - for (int i = 1; i <= 15; ++i) - conn->setButton(conn->translateMouseButton(i), XIMaskIsSet(buttonMask, i)); - } -} - // With XI 2.2+ press/release/motion comes here instead of the above handlers. void QXcbWindow::handleXIMouseEvent(xcb_ge_event_t *event, Qt::MouseEventSource source) { QXcbConnection *conn = connection(); xXIDeviceEvent *ev = reinterpret_cast(event); + + if (ev->buttons_len > 0) { + unsigned char *buttonMask = (unsigned char *) &ev[1]; + // There is a bug in the evdev driver which leads to receiving mouse events without + // XIPointerEmulated being set: https://bugs.freedesktop.org/show_bug.cgi?id=98188 + // Filter them out by other attributes: when their source device is a touch screen + // and the LMB is pressed. + if (XIMaskIsSet(buttonMask, 1) && conn->isTouchScreen(ev->sourceid)) { + if (Q_UNLIKELY(lcQpaXInputEvents().isDebugEnabled())) + qCDebug(lcQpaXInput, "XI2 mouse event from touch device %d was ignored", ev->sourceid); + return; + } + for (int i = 1; i <= 15; ++i) + conn->setButton(conn->translateMouseButton(i), XIMaskIsSet(buttonMask, i)); + } + const Qt::KeyboardModifiers modifiers = conn->keyboard()->translateModifiers(ev->mods.effective_mods); const int event_x = fixed1616ToInt(ev->event_x); const int event_y = fixed1616ToInt(ev->event_y); @@ -2458,23 +2463,18 @@ void QXcbWindow::handleXIMouseEvent(xcb_ge_event_t *event, Qt::MouseEventSource switch (ev->evtype) { case XI_ButtonPress: - handleXIMouseButtonState(event); if (Q_UNLIKELY(lcQpaXInputEvents().isDebugEnabled())) qCDebug(lcQpaXInputEvents, "XI2 mouse press, button %d, time %d, source %s", button, ev->time, sourceName); conn->setButton(button, true); handleButtonPressEvent(event_x, event_y, root_x, root_y, ev->detail, modifiers, ev->time, source); break; case XI_ButtonRelease: - handleXIMouseButtonState(event); if (Q_UNLIKELY(lcQpaXInputEvents().isDebugEnabled())) qCDebug(lcQpaXInputEvents, "XI2 mouse release, button %d, time %d, source %s", button, ev->time, sourceName); conn->setButton(button, false); handleButtonReleaseEvent(event_x, event_y, root_x, root_y, ev->detail, modifiers, ev->time, source); break; case XI_Motion: - // Here we do NOT call handleXIMouseButtonState because we don't expect button state change to be bundled with motion. - // When a touchscreen is pressed, an XI_Motion event occurs in which XIMaskIsSet says the left button is pressed, - // but we don't want QGuiApplicationPrivate::processMouseEvent() to react by generating a mouse press event. if (Q_UNLIKELY(lcQpaXInputEvents().isDebugEnabled())) qCDebug(lcQpaXInputEvents, "XI2 mouse motion %d,%d, time %d, source %s", event_x, event_y, ev->time, sourceName); handleMotionNotifyEvent(event_x, event_y, root_x, root_y, modifiers, ev->time, source); diff --git a/src/plugins/platforms/xcb/qxcbwindow.h b/src/plugins/platforms/xcb/qxcbwindow.h index 089df8f3f6..cfa4964151 100644 --- a/src/plugins/platforms/xcb/qxcbwindow.h +++ b/src/plugins/platforms/xcb/qxcbwindow.h @@ -139,7 +139,6 @@ public: void handleFocusOutEvent(const xcb_focus_out_event_t *event) override; void handlePropertyNotifyEvent(const xcb_property_notify_event_t *event) override; #ifdef XCB_USE_XINPUT22 - void handleXIMouseButtonState(const xcb_ge_event_t *); void handleXIMouseEvent(xcb_ge_event_t *, Qt::MouseEventSource source = Qt::MouseEventNotSynthesized) override; void handleXIEnterLeave(xcb_ge_event_t *) override; #endif