diff options
Diffstat (limited to 'src/plugins/platforms/xcb/qxcbconnection_xi2.cpp')
| -rw-r--r-- | src/plugins/platforms/xcb/qxcbconnection_xi2.cpp | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/src/plugins/platforms/xcb/qxcbconnection_xi2.cpp b/src/plugins/platforms/xcb/qxcbconnection_xi2.cpp index dfd4feb254..991c82eaaa 100644 --- a/src/plugins/platforms/xcb/qxcbconnection_xi2.cpp +++ b/src/plugins/platforms/xcb/qxcbconnection_xi2.cpp @@ -92,6 +92,9 @@ void QXcbConnection::initializeXInput2() // Tablet support: Find the stylus-related devices. xi2SetupTabletDevices(); #endif // QT_NO_TABLETEVENT +#ifdef XI2_TOUCH_DEBUG + qDebug("XInput version %d.%d is supported", xiMajor, m_xi2Minor); +#endif } } } @@ -118,7 +121,16 @@ void QXcbConnection::xi2Select(xcb_window_t window) mask.deviceid = XIAllMasterDevices; mask.mask_len = sizeof(bitMask); mask.mask = xiBitMask; - XISelectEvents(xDisplay, window, &mask, 1); + Status result = XISelectEvents(xDisplay, window, &mask, 1); + // If we have XInput 2.2 and successfully enable touch on the master + // devices, then evdev touchscreens will provide touch only. In most other + // cases, there will be emulated mouse events, because true X11 touch + // support is so new that for the older drivers, mouse emulation was the + // only way; and it's still the fallback even with the modern evdev driver. + // But if neither Qt nor X11 does mouse emulation, it will not be possible + // to interact with mouse-oriented QWidgets; so we have to let Qt do it. + if (m_xi2Minor >= 2 && result == Success) + has_touch_without_mouse_emulation = true; #endif #ifndef QT_NO_TABLETEVENT |