QMediaTimeRange Class | Qt Multimedia 5.8

Qt 5.8 | Qt Multimedia | C++ Classes | QMediaTimeRange

Qt 5.8.0 Reference Documentation

# QMediaTimeRange Class

The QMediaTimeRange class represents a set of zero or more disjoint time intervals. More...

Header: | #include <QMediaTimeRange>
qmake: | QT += multimedia

- List of all members, including inherited members

Note: All functions in this class are reentrant.

## Public Functions

| QMediaTimeRange()
| QMediaTimeRange(qint64 start, qint64 end)
| QMediaTimeRange(const QMediaTimeInterval &interval)
| QMediaTimeRange(const QMediaTimeRange &range)
| ~QMediaTimeRange()
void | addInterval(const QMediaTimeInterval &interval)
void | addInterval(qint64 start, qint64 end)
void | addTimeRange(const QMediaTimeRange &range)
void | clear()
bool | contains(qint64 time) const
qint64 | earliestTime() const
QList<QMediaTimeInterval> | intervals() const
bool | isContinuous() const
bool | isEmpty() const
qint64 | latestTime() const
void | removeInterval(const QMediaTimeInterval &interval)
void | removeInterval(qint64 start, qint64 end)
void | removeTimeRange(const QMediaTimeRange &range)
QMediaTimeRange & | operator+=(const QMediaTimeRange &other)
QMediaTimeRange & | operator+=(const QMediaTimeInterval &interval)
QMediaTimeRange & | operator-=(const QMediaTimeRange &other)
QMediaTimeRange & | operator-=(const QMediaTimeInterval &interval)
QMediaTimeRange & | operator=(const QMediaTimeRange &other)
QMediaTimeRange & | operator=(const QMediaTimeInterval &interval)

## Related Non-Members

bool | operator!=(const QMediaTimeInterval &a, const QMediaTimeInterval &b)
bool | operator!=(const QMediaTimeRange &a, const QMediaTimeRange &b)
QMediaTimeRange | operator+(const QMediaTimeRange &r1, const QMediaTimeRange &r2)
QMediaTimeRange | operator-(const QMediaTimeRange &r1, const QMediaTimeRange &r2)
bool | operator==(const QMediaTimeInterval &a, const QMediaTimeInterval &b)
bool | operator==(const QMediaTimeRange &a, const QMediaTimeRange &b)

## Detailed Description

The QMediaTimeRange class represents a set of zero or more disjoint time intervals.

The earliestTime(), latestTime(), intervals() and isEmpty() methods are used to get information about the current time range.

The addInterval(), removeInterval() and clear() methods are used to modify the current time range.

When adding or removing intervals from the time range, existing intervals within the range may be expanded, trimmed, deleted, merged or split to ensure that all intervals within the time range remain distinct and disjoint. As a consequence, all intervals added or removed from a time range must be normal.

See also QMediaTimeInterval.

## Member Function Documentation

### QMediaTimeRange::QMediaTimeRange()

Constructs an empty time range.

### QMediaTimeRange::QMediaTimeRange(qint64 start, qint64 end)

Constructs a time range that contains an initial interval from start to end inclusive.

If the interval is not normal, the resulting time range will be empty.

See also addInterval().

### QMediaTimeRange::QMediaTimeRange(const QMediaTimeInterval &interval)

Constructs a time range that contains an initial interval, interval.

If interval is not normal, the resulting time range will be empty.

See also addInterval().

### QMediaTimeRange::QMediaTimeRange(const QMediaTimeRange &range)

Constructs a time range by copying another time range.

### QMediaTimeRange::~QMediaTimeRange()

Destructor.

### void QMediaTimeRange::addInterval(const QMediaTimeInterval &interval)

Adds the specified interval to the time range.

Adding intervals which are not normal is invalid, and will be ignored.

If the specified interval is adjacent to, or overlaps existing intervals within the time range, these intervals will be merged.

This operation takes linear time.

See also removeInterval().

### void QMediaTimeRange::addInterval(qint64 start, qint64 end)

This is an overloaded function.

Adds the interval specified by start and end to the time range.

See also addInterval().

### void QMediaTimeRange::addTimeRange(const QMediaTimeRange &range)

Adds each of the intervals in range to this time range.

Equivalent to calling addInterval() for each interval in range.

### void QMediaTimeRange::clear()

Removes all intervals from the time range.

See also removeInterval().

### bool QMediaTimeRange::contains(qint64 time) const

Returns true if the specified time lies within the time range.

### qint64 QMediaTimeRange::earliestTime() const

Returns the earliest time within the time range.

For empty time ranges, this value is equal to zero.

See also latestTime().

### QList<QMediaTimeInterval> QMediaTimeRange::intervals() const

Returns the list of intervals covered by this time range.

### bool QMediaTimeRange::isContinuous() const

Returns true if the time range consists of a continuous interval. That is, there is one or fewer disjoint intervals within the time range.

### bool QMediaTimeRange::isEmpty() const

Returns true if there are no intervals within the time range.

See also intervals().

### qint64 QMediaTimeRange::latestTime() const

Returns the latest time within the time range.

For empty time ranges, this value is equal to zero.

See also earliestTime().

### void QMediaTimeRange::removeInterval(const QMediaTimeInterval &interval)

Removes the specified interval from the time range.

Removing intervals which are not normal is invalid, and will be ignored.

Intervals within the time range will be trimmed, split or deleted such that no intervals within the time range include any part of the target interval.

This operation takes linear time.

See also addInterval().

### void QMediaTimeRange::removeInterval(qint64 start, qint64 end)

This is an overloaded function.

Removes the interval specified by start and end from the time range.

See also removeInterval().

### void QMediaTimeRange::removeTimeRange(const QMediaTimeRange &range)

Removes each of the intervals in range from this time range.

Equivalent to calling removeInterval() for each interval in range.

### QMediaTimeRange &QMediaTimeRange::operator+=(const QMediaTimeRange &other)

Adds each interval in other to the time range and returns the result.

### QMediaTimeRange &QMediaTimeRange::operator+=(const QMediaTimeInterval &interval)

Adds the specified interval to the time range and returns the result.

### QMediaTimeRange &QMediaTimeRange::operator-=(const QMediaTimeRange &other)

Removes each interval in other from the time range and returns the result.

### QMediaTimeRange &QMediaTimeRange::operator-=(const QMediaTimeInterval &interval)

Removes the specified interval from the time range and returns the result.

### QMediaTimeRange &QMediaTimeRange::operator=(const QMediaTimeRange &other)

Takes a copy of the other time range and returns itself.

### QMediaTimeRange &QMediaTimeRange::operator=(const QMediaTimeInterval &interval)

Sets the time range to a single continuous interval, interval.

## Related Non-Members

### bool operator!=(const QMediaTimeInterval &a, const QMediaTimeInterval &b)

Returns true if a is not exactly equal to b.

### bool operator!=(const QMediaTimeRange &a, const QMediaTimeRange &b)

Returns true if one or more intervals in a are not present in b.

### QMediaTimeRange operator+(const QMediaTimeRange &r1, const QMediaTimeRange &r2)

Returns a time range containing the union between r1 and r2.

### QMediaTimeRange operator-(const QMediaTimeRange &r1, const QMediaTimeRange &r2)

Returns a time range containing r2 subtracted from r1.

### bool operator==(const QMediaTimeInterval &a, const QMediaTimeInterval &b)

Returns true if a is exactly equal to b.

### bool operator==(const QMediaTimeRange &a, const QMediaTimeRange &b)

Returns true if all intervals in a are present in b.