diff --git a/src/frontends/qt/GuiWorkArea.cpp b/src/frontends/qt/GuiWorkArea.cpp index fa40a5aa10..23d6efa541 100644 --- a/src/frontends/qt/GuiWorkArea.cpp +++ b/src/frontends/qt/GuiWorkArea.cpp @@ -852,6 +852,9 @@ void GuiWorkArea::mouseReleaseEvent(QMouseEvent * e) FuncRequest const cmd(LFUN_MOUSE_RELEASE, e->x(), e->y(), q_button_state(e->button()), q_key_state(e->modifiers())); +#if (QT_VERSION > QT_VERSION_CHECK(5,10,1)) + d->synthetic_mouse_event_.cmd = cmd; // QtBug QAbstractScrollArea::mouseMoveEvent +#endif d->dispatch(cmd); e->accept(); } @@ -859,6 +862,19 @@ void GuiWorkArea::mouseReleaseEvent(QMouseEvent * e) void GuiWorkArea::mouseMoveEvent(QMouseEvent * e) { +#if (QT_VERSION > QT_VERSION_CHECK(5,10,1)) + // cancel the event if the coordinates didn't change, this is due to QtBug + // QAbstractScrollArea::mouseMoveEvent, the event is triggered falsely when quickly + // double tapping a touchpad. To test: try to select a word by quickly double tapping + // on a touchpad while hovering the cursor over that word in the work area. + // This bug does not occur on Qt versions 5.10.1 and below. Only Windows seems to be affected. + // ML thread: https://www.mail-archive.com/lyx-devel@lists.lyx.org/msg211699.html + // Qt bugtracker: https://bugreports.qt.io/browse/QTBUG-85431 + if (e->x() == d->synthetic_mouse_event_.cmd.x() && // QtBug QAbstractScrollArea::mouseMoveEvent + e->y() == d->synthetic_mouse_event_.cmd.y()) // QtBug QAbstractScrollArea::mouseMoveEvent + return; // QtBug QAbstractScrollArea::mouseMoveEvent +#endif + // we kill the triple click if we move doubleClickTimeout(); FuncRequest cmd(LFUN_MOUSE_MOTION, e->x(), e->y(),