- Qt 5.15
- Qt Core
- C++ Classes
- QLineF
- Qt 5.15.15 Reference Documentation

# Obsolete Members for QLineF

The following members of class QLineF are obsolete. They are provided to keep old source code working. We strongly advise against using them in new code.

## Public Types

`(obsolete)` enum | IntersectType { NoIntersection, UnboundedIntersection, BoundedIntersection }

## Public Functions

`(obsolete)` qreal | angle(const QLineF &line) const
`(obsolete)` IntersectType | intersect(const QLineF &line, QPointF *intersectionPoint) const

## Member Type Documentation

### enum QLineF::IntersectType

This enum is obsolete. It is provided to keep old source code working. We strongly advise against using it in new code.

Use QLineF::IntersectionType instead.

Constant | Value | Description
--- | --- | ---
`QLineF::NoIntersection` | `0` | Lines do not intersect.
`QLineF::UnboundedIntersection` | `2` | Lines intersect, but not within the range defined by their lengths.
`QLineF::BoundedIntersection` | `1` | Lnes intersect within the range defined by their lengths.

## Member Function Documentation

### qreal QLineF::angle(const QLineF &line) const

This function is obsolete. It is provided to keep old source code working. We strongly advise against using it in new code.

Returns the angle (in degrees) between this line and the given line, taking the direction of the lines into account. If the lines do not intersect within their range, it is the intersection point of the extended lines that serves as origin (see QLineF::UnboundedIntersection).

When the lines are parallel, this function returns 0 if they have the same direction; otherwise it returns 180.

See also intersect().

### IntersectType QLineF::intersect(const QLineF &line, QPointF *intersectionPoint) const

This function is obsolete. It is provided to keep old source code working. We strongly advise against using it in new code.

Use intersects() instead

Returns a value indicating whether or not this line intersects with the given line.

The actual intersection point is extracted to intersectionPoint (if the pointer is valid). If the lines are parallel, the intersection point is undefined.