Musical length of notes and rests. More...

#include <playablelength.h>

Public Types
enum	CAMusicLength { Undefined = -1, Breve = 0, Whole = 1, Half = 2, Quarter = 4, Eighth = 8, Sixteenth = 16, ThirtySecond = 32, SixtyFourth = 64, HundredTwentyEighth = 128 }
Public Member Functions
	CAPlayableLength ()
	CAPlayableLength (CAMusicLength l, int dotted=0)
const CAMusicLength	musicLength ()
const int	dotted ()
void	setMusicLength (const CAMusicLength l)
void	setDotted (const int d)
bool	operator== (CAPlayableLength)
bool	operator!= (CAPlayableLength)
Static Public Member Functions
static const QString	musicLengthToString (CAMusicLength length)
static CAMusicLength	musicLengthFromString (const QString length)
static const int	playableLengthToTimeLength (CAPlayableLength length)
static const int	musicLengthToTimeLength (CAMusicLength l)
static QList< CAPlayableLength >	timeLengthToPlayableLengthList (int timeLength, bool longNotesFirst=true, int dotsLimit=4)
static QList< CAPlayableLength >	matchToBars (CAPlayableLength len, int timeStart, CABarline lastBarline, CATimeSignature ts, int dotsLimit=4)
Private Attributes
CAMusicLength	_musicLength
int	_dotted

Detailed Description

Musical length of notes and rests.

Licensed under the GNU GENERAL PUBLIC LICENSE. See LICENSE.GPL for details.

    This class represents a musical length (quarter, half, whole etc.) of notes
    and rests with number of dots.

    It consists of two properties:
    - music length (quarter, half, whole etc.)
    - number of dots

    Playable length can be easily converted to timeLength. Vice-versa is a bit more
    difficult.

    \sa playableLengthToTimeLength(), CARest::composeRests()

Member Enumeration Documentation

enum CAPlayableLength::CAMusicLength

Enumerator:

Undefined
Breve
Whole
Half
Quarter
Eighth
Sixteenth
ThirtySecond
SixtyFourth
HundredTwentyEighth

Constructor & Destructor Documentation

CAPlayableLength::CAPlayableLength ( )

References setDotted(), setMusicLength(), and Undefined.

Referenced by matchToBars(), musicLengthToTimeLength(), and timeLengthToPlayableLengthList().

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CAPlayableLength::CAPlayableLength	(	CAMusicLength	l,
		int	dotted = `0`
	)

References setDotted(), and setMusicLength().

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Member Function Documentation

const int CAPlayableLength::dotted ( ) [inline]

References _dotted.

Referenced by CAMusElementFactory::addPlayableDotted(), CADrawableNote::CADrawableNote(), CADrawableRest::CADrawableRest(), CADrawableRest::draw(), CADrawableNote::draw(), CACanorusMLExport::exportPlayableLength(), operator==(), CALilyPondImport::playableLengthFromLilyPond(), CAMidiImport::playableLengthFromLilyPond(), CALilyPondExport::playableLengthToLilyPond(), playableLengthToTimeLength(), CAMainWin::scoreViewPortKeyPress(), and CAMainWin::updateTempoToolBar().

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QList< CAPlayableLength > CAPlayableLength::matchToBars	(	CAPlayableLength	len,
		int	timeStart,
		CABarline *	lastBarline,
		CATimeSignature *	ts,
		int	dotsLimit = `4`
	)		`[static]`

Split a playable to match a given bar border and bar length.

References CATimeSignature::beat(), CATimeSignature::beats(), CAPlayableLength(), playableLengthToTimeLength(), timeLengthToPlayableLengthList(), and CAMusElement::timeStart().

Referenced by CAKeybdInput::midiInEventToScore().

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const CAMusicLength CAPlayableLength::musicLength ( ) [inline]

References _musicLength.

Referenced by CAMusElementFactory::addPlayableDotted(), CADrawableNote::CADrawableNote(), CADrawableRest::CADrawableRest(), CALilyPondExport::doAnacrusisCheck(), CACanorusMLExport::exportPlayableLength(), CALilyPondImport::importVoiceImpl(), operator==(), CALilyPondExport::playableLengthToLilyPond(), playableLengthToTimeLength(), CAMainWin::updatePlayableToolBar(), and CAMainWin::updateTempoToolBar().

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CAPlayableLength::CAMusicLength CAPlayableLength::musicLengthFromString ( const QString length ) [static]

References Breve, Eighth, Half, HundredTwentyEighth, Quarter, Sixteenth, SixtyFourth, ThirtySecond, Undefined, and Whole.

Referenced by CACanorusMLImport::importMark(), and CACanorusMLImport::startElement().

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const QString CAPlayableLength::musicLengthToString ( CAPlayableLength::CAMusicLength length ) [static]

References Breve, Eighth, Half, HundredTwentyEighth, Quarter, Sixteenth, SixtyFourth, ThirtySecond, Undefined, and Whole.

Referenced by CACanorusMLExport::exportPlayableLength().

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static const int CAPlayableLength::musicLengthToTimeLength ( CAMusicLength l ) [inline, static]

References CAPlayableLength(), and playableLengthToTimeLength().

Referenced by CAMainWin::scoreViewPortMouseMove(), and timeLengthToPlayableLengthList().

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bool CAPlayableLength::operator!= ( CAPlayableLength l )

Compares two playable lengths.

bool CAPlayableLength::operator== ( CAPlayableLength l )

Compares two playable lengths.

References dotted(), and musicLength().

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const int CAPlayableLength::playableLengthToTimeLength ( CAPlayableLength length ) [static]

Converts internal enum playableLength to actual timeLength.

See also:: CARest::composeRests()

References Breve, dotted(), Eighth, Half, HundredTwentyEighth, musicLength(), Quarter, Sixteenth, SixtyFourth, ThirtySecond, and Whole.

Referenced by CATuplet::assignTimes(), CAPlayable::calculateTimeLength(), CAMainWin::deleteSelection(), CALilyPondExport::doAnacrusisCheck(), CAMainWin::insertMusElementAt(), matchToBars(), musicLengthToTimeLength(), CAMainWin::on_uiPlayableLength_toggled(), CAMusElementFactory::placeAutoBar(), CAPlayback::run(), and timeLengthToPlayableLengthList().

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void CAPlayableLength::setDotted ( const int d ) [inline]

References _dotted.

Referenced by CAMusElementFactory::addPlayableDotted(), CAPlayableLength(), CALilyPondImport::playableLengthFromLilyPond(), CAMidiImport::playableLengthFromLilyPond(), and CAMainWin::scoreViewPortKeyPress().

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void CAPlayableLength::setMusicLength ( const CAMusicLength l ) [inline]

References _musicLength.

Referenced by CAPlayableLength(), CALilyPondImport::playableLengthFromLilyPond(), and CAMidiImport::playableLengthFromLilyPond().

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QList< CAPlayableLength > CAPlayableLength::timeLengthToPlayableLengthList	(	int	t,
		bool	longNotesFirst = `true`,
		int	dotsLimit = `4`
	)		`[static]`

Compute for a given time length the CAPlayableLengths. In the general case this could result in several notes. In the canorus GUI we have can have max. 4 dots. By default longer notes appear first in the list, but with negating longNotesFirst the short ones appear first. This is useful for end of bar notes.

To make this computation fast we take in account that note durations are a binary presentation of the time duration. The breve value is not exactly a log2 value, so we do this singular nonlinear operation through the method of computation (see **).

Limitations: Maximum four dots per note, and the smallest resulting time duration is SixtyFourth;

Todo: Allow change of limitations as function parameters, which are longest note and number of dots.

References Breve, CAPlayableLength(), HundredTwentyEighth, musicLengthToTimeLength(), and playableLengthToTimeLength().

Referenced by matchToBars(), CAMusicXmlImport::readNote(), and CAMidiImport::writeMidiChannelEventsToVoice().

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