See also QX11EmbedWidget::QX11EmbedWidget() in src/gui/kernel/qx11embed_x11.cpp in qt4. https: //github.com/qt/qt/blob/4.8/src/gui/kernel/qx11embed_x11.cpp#L475-L477 Change-Id: I47504a2d8f3e33c367f092d01ee5d7e1b16b5106 Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io> (cherry picked from commit a0ec35d5f290ce07c591fb3f075390e592326d2a) Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>