diff options
Diffstat (limited to 'src/plugins/platforms/xcb/qxcbconnection_xi2.cpp')
-rw-r--r-- | src/plugins/platforms/xcb/qxcbconnection_xi2.cpp | 94 |
1 files changed, 93 insertions, 1 deletions
diff --git a/src/plugins/platforms/xcb/qxcbconnection_xi2.cpp b/src/plugins/platforms/xcb/qxcbconnection_xi2.cpp index e6e0ee988c..9a250b875f 100644 --- a/src/plugins/platforms/xcb/qxcbconnection_xi2.cpp +++ b/src/plugins/platforms/xcb/qxcbconnection_xi2.cpp @@ -127,7 +127,7 @@ void QXcbConnection::xi2SelectDeviceEvents(xcb_window_t window) XIEventMask mask; mask.mask_len = sizeof(bitMask); mask.mask = xiBitMask; - mask.deviceid = XIAllMasterDevices; + mask.deviceid = XIAllDevices; Display *dpy = static_cast<Display *>(m_xlib_display); Status result = XISelectEvents(dpy, window, &mask, 1); if (result == Success) @@ -315,6 +315,7 @@ void QXcbConnection::xi2SetupDevices() #endif m_scrollingDevices.clear(); m_touchDevices.clear(); + m_floatingSlaveDevices.clear(); Display *xDisplay = static_cast<Display *>(m_xlib_display); int deviceCount = 0; @@ -322,6 +323,10 @@ void QXcbConnection::xi2SetupDevices() m_xiMasterPointerIds.clear(); for (int i = 0; i < deviceCount; ++i) { XIDeviceInfo deviceInfo = devices[i]; + if (deviceInfo.use == XIFloatingSlave) { + m_floatingSlaveDevices.append(deviceInfo.deviceid); + continue; + } if (deviceInfo.use == XIMasterPointer) { m_xiMasterPointerIds.append(deviceInfo.deviceid); continue; @@ -550,6 +555,72 @@ static inline qreal fixed1616ToReal(FP1616 val) } #endif // defined(XCB_USE_XINPUT21) || QT_CONFIG(tabletevent) +namespace { + +/*! \internal + + Qt listens for XIAllDevices to avoid losing mouse events. This function + ensures that we don't process the same event twice: from a slave device and + then again from a master device. + + In a normal use case (e.g. mouse press and release inside a window), we will + drop events from master devices as duplicates. Other advantage of processing + events from slave devices is that they don't share button state. All buttons + on a master device share the state. + + Examples of special cases: + + - During system move/resize, window manager (_NET_WM_MOVERESIZE) grabs the + master pointer, in this case we process the matching release from the slave + device. A master device event is not sent by the server, hence no duplicate + event to drop. If we listened for XIAllMasterDevices instead, we would never + see a release event in this case. + + - If we dismiss a context menu by clicking somewhere outside a Qt application, + we will process the mouse press from the master pointer as that is the + device we are grabbing. We are not grabbing slave devices (grabbing on the + slave device is buggy according to 19d289ab1b5bde3e136765e5432b5c7d004df3a4). + And since the event occurs outside our window, the slave device event is + not sent to us by the server, hence no duplicate event to drop. +*/ +bool isDuplicateEvent(xcb_ge_event_t *event) +{ + struct qXIEvent { + bool isValid = false; + uint16_t sourceid; + uint8_t evtype; + uint32_t detail; + int32_t root_x; + int32_t root_y; + }; + static qXIEvent lastSeenEvent; + + bool isDuplicate = false; + auto xiDeviceEvent = reinterpret_cast<xXIDeviceEvent *>(event); + if (lastSeenEvent.isValid) { + isDuplicate = lastSeenEvent.sourceid == xiDeviceEvent->sourceid && + lastSeenEvent.evtype == xiDeviceEvent->evtype && + lastSeenEvent.detail == xiDeviceEvent->detail && + lastSeenEvent.root_x == xiDeviceEvent->root_x && + lastSeenEvent.root_y == xiDeviceEvent->root_y; + } else { + lastSeenEvent.isValid = true; + } + lastSeenEvent.sourceid = xiDeviceEvent->sourceid; + lastSeenEvent.evtype = xiDeviceEvent->evtype; + lastSeenEvent.detail = xiDeviceEvent->detail; + lastSeenEvent.root_x = xiDeviceEvent->root_x; + lastSeenEvent.root_y = xiDeviceEvent->root_y; + + if (isDuplicate) + // This sanity check ensures that special cases like QTBUG-59277 keep working. + lastSeenEvent.isValid = false; // An event can be a duplicate only once. + + return isDuplicate; +} + +} // namespace + void QXcbConnection::xi2HandleEvent(xcb_ge_event_t *event) { xi2PrepareXIGenericDeviceEvent(event); @@ -559,10 +630,14 @@ void QXcbConnection::xi2HandleEvent(xcb_ge_event_t *event) xXIEnterEvent *xiEnterEvent = 0; QXcbWindowEventListener *eventListener = 0; + bool isTouchEvent = true; switch (xiEvent->evtype) { case XI_ButtonPress: case XI_ButtonRelease: case XI_Motion: + isTouchEvent = false; + if (!xi2MouseEventsDisabled() && isDuplicateEvent(event)) + return; #ifdef XCB_USE_XINPUT22 case XI_TouchBegin: case XI_TouchUpdate: @@ -570,6 +645,18 @@ void QXcbConnection::xi2HandleEvent(xcb_ge_event_t *event) #endif { xiDeviceEvent = reinterpret_cast<xXIDeviceEvent *>(event); + + if (m_floatingSlaveDevices.contains(xiDeviceEvent->sourceid)) + return; // Not interested in floating slave device events, only in attached slaves. + + bool isSlaveEvent = xiDeviceEvent->deviceid == xiDeviceEvent->sourceid; + if (!xi2MouseEventsDisabled() && isTouchEvent && isSlaveEvent) { + // For touch events we want events only from master devices, at least + // currently there is no apparent reason why we would need to consider + // events from slave devices. + return; + } + eventListener = windowEventListenerFromId(xiDeviceEvent->event); sourceDeviceId = xiDeviceEvent->sourceid; // use the actual device id instead of the master break; @@ -845,6 +932,11 @@ bool QXcbConnection::startSystemMoveResizeForTouchBegin(xcb_window_t window, con } return false; } + +void QXcbConnection::abortSystemMoveResizeForTouch() +{ + m_startSystemMoveResizeInfo.window = XCB_NONE; +} #endif // XCB_USE_XINPUT22 bool QXcbConnection::xi2SetMouseGrabEnabled(xcb_window_t w, bool grab) |