diff options
Diffstat (limited to 'src/corelib/tools/qpoint.cpp')
| -rw-r--r-- | src/corelib/tools/qpoint.cpp | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/corelib/tools/qpoint.cpp b/src/corelib/tools/qpoint.cpp index 66f06e9..c297709 100644 --- a/src/corelib/tools/qpoint.cpp +++ b/src/corelib/tools/qpoint.cpp @@ -438,8 +438,12 @@ QDebug operator<<(QDebug d, const QPointF &p) /*! \fn bool QPointF::isNull() const - Returns true if both the x and y coordinates are set to 0.0, + Returns true if both the x and y coordinates are set to +0.0; otherwise returns false. + + \note Since this function treats +0.0 and -0.0 differently, points + with zero-valued coordinates where either or both values have a + negative sign are not defined to be null points. */ |