IlvTimeInterval Class Reference

Holds a time interval. More...

#include <ilviews/graphics/timescale.h>

Public Member Functions
	IlvTimeInterval (IlDate startTime, IlDate endTime)
	Constructor. More...
	IlvTimeInterval (IlDate startTime, IlvDuration duration)
	Constructor. More...
IlvDuration	getDuration ()
	Returns the duration between the interval start and end times.
IlDate	getEnd ()
	Returns the interval end time.
IlDate	getStart ()
	Returns the interval start time. More...
void	setDuration (IlvDuration duration)
	Sets the duration between the interval start and end times. More...
void	setEnd (IlDate end)
	Sets the interval end time. More...
void	setInterval (IlDate start, IlDate end)
	Sets the interval start and end times. More...
void	setIntervalDuration (IlDate start, IlvDuration duration)
	Sets the interval start time and duration. More...
void	setStart (IlDate start)
	Sets the interval start time. More...

Protected Member Functions
void	normalize ()
	Normalize the start and end times. More...

Detailed Description

Holds a time interval.

Library: views

Instances of this class represent a specific time span, with millisecond precision. The time interval is defined by a start time and an end time. IlvTimeInterval maintains the invariant that its start time is always before or equal to its end time. This invariant is maintained quietly, swapping its start and end time values as needed.

Constructor & Destructor Documentation

IlvTimeInterval::IlvTimeInterval	(	IlDate	startTime,
		IlDate	endTime
	)

Constructor.

Initializes a new IlvTimeInterval with the specified start and end times.

Parameters

startTime	The interval start time.
endTime	The interval end time.

IlvTimeInterval::IlvTimeInterval	(	IlDate	startTime,
		IlvDuration	duration
	)

Constructor.

Initializes a new IlvTimeInterval with the specified start time and duration.

Parameters

startTime	The interval start time.
duration	The interval duration.

Member Function Documentation

IlDate IlvTimeInterval::getStart

(

)

Returns the interval start time.

Returns

the IlDate at which the interval starts.

void IlvTimeInterval::normalize ( )

protected

Normalize the start and end times.

Enforces the invariant that the interval start time must fall before or equal to its end time. The interval start and end time values are swapped if necessary.

void IlvTimeInterval::setDuration

(

IlvDuration

duration

)

Sets the duration between the interval start and end times.

The invariant is maintained that the interval start time must always be before or equal to its end time. Therefore, if duration < 0 then the interval's current start time will silently become its end time.

Parameters

duration

The duration of the interval.

void IlvTimeInterval::setEnd

(

IlDate

end

)

Sets the interval end time.

The invariant is maintained that the interval start time must always be before or equal to its end time. Therefore, if t < getStart() then t will actually become the interval's new start time and its previous start time will become its new end time.

Parameters

end	The end time of the interval.

void IlvTimeInterval::setInterval	(	IlDate	start,
		IlDate	end
	)

Sets the interval start and end times.

The invariant is maintained that the interval start time must always be before or equal to its end time. Therefore, if end < start then the values will be silently swapped and start will actually become the interval's new end time and end will become the interval's new start time.

Parameters

start	The start time of the interval.
end	The end time of the interval.

void IlvTimeInterval::setIntervalDuration	(	IlDate	start,
		IlvDuration	duration
	)

Sets the interval start time and duration.

The invariant is maintained that the interval start time must always be before or equal to its end time. Therefore, if duration < 0 then start will silently become the interval's new end time.

Parameters

start	The start time of the interval.
duration	The duration of the interval.

void IlvTimeInterval::setStart

(

IlDate

start

)

Sets the interval start time.

The invariant is maintained that the interval start time must always be before or equal to its end time. Therefore, if t > getEnd() then t will actually become the interval's new end time and its previous end time will become its new start time.

Parameters

start

The start time of the interval.