Previously, querying Qt::ImEnabled only returned the value of isEnabling(), which is incorrect for edit widgets with read-only properties set, as Qt::ImEnabled indicates whether text can be *input* through the input method, which results in the IM being able to insert text into read-only edit widgets. The fixed version uses both isEnabling() and isReadOnly() values to determine whether input methods need to be enabled. For some platforms (like iOS and Android) that rely on IM to select text, a check for ImReadOnly has been added to their QPA plugins to enable handles on read-only input boxes. At the same time, the imEnabledNotImplemented function in the test file tst_qwidget was modified, since ImEnabling should give a _false_ value when a lineedit is read-only. Task-number: QTBUG-105009 Task-number: QTBUG-110838 Task-number: QTBUG-119182 Pick-to: 6.7 6.6 6.5 Change-Id: Ia2abcdb3200826d567f90447d4f8b71d0ef1fbf0 Reviewed-by: Yansheng Zhu <670429759@qq.com> Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>