private int measureLength; /** The time (in pulses) of a measure */
/** Create a new staff with the given list of music symbols,
* and the given key signature. The clef is determined by
* the clef of the first chord symbol. The track number is used
* to determine whether to join this left/right vertical sides
* with the staffs above and below. The SheetMusicOptions are used
* to check whether to display measure numbers or not.
*/
public Staff(List <MusicSymbol> symbols, KeySignature key,
MidiOptions options,
int tracknum, int totaltracks)
{
keysigWidth = SheetMusic.KeySignatureWidth(key);
this.tracknum = tracknum;
this.totaltracks = totaltracks;
showMeasures = (options.showMeasures && tracknum == 0);
measureLength = options.time.Measure;
Clef clef = FindClef(symbols);
clefsym = new ClefSymbol(clef, 0, false);
keys = key.GetSymbols(clef);
this.symbols = symbols;
CalculateWidth(options.scrollVert);
CalculateHeight();
CalculateStartEndTime();
FullJustify();
}
CreateNoteData(List <MidiNote> midinotes, KeySignature key,
TimeSignature time)
{
int len = midinotes.Count;
NoteData[] notedata = new NoteData[len];
for (int i = 0; i < len; i++)
{
MidiNote midi = midinotes[i];
notedata[i] = new NoteData();
notedata[i].number = midi.Number;
notedata[i].leftside = true;
notedata[i].whitenote = key.GetWhiteNote(midi.Number);
notedata[i].duration = time.GetNoteDuration(midi.EndTime - midi.StartTime);
notedata[i].accid = key.GetAccidental(midi.Number, midi.StartTime / time.Measure);
if (i > 0 && (notedata[i].whitenote.Dist(notedata[i - 1].whitenote) == 1))
{
/* This note (notedata[i]) overlaps with the previous note.
* Change the side of this note.
*/
if (notedata[i - 1].leftside)
{
notedata[i].leftside = false;
}
else
{
notedata[i].leftside = true;
}
}
else
{
notedata[i].leftside = true;
}
}
return(notedata);
}
List <ChordSymbol> CreateChords(List <MidiNote> midinotes,
KeySignature key,
TimeSignature time,
ClefMeasures clefs)
{
int i = 0;
List <ChordSymbol> chords = new List <ChordSymbol>();
List <MidiNote> notegroup = new List <MidiNote>(12);
int len = midinotes.Count;
while (i < len)
{
int starttime = midinotes[i].StartTime;
Clef clef = clefs.GetClef(starttime);
/* Group all the midi notes with the same start time
* into the notes list.
*/
notegroup.Clear();
notegroup.Add(midinotes[i]);
i++;
while (i < len && midinotes[i].StartTime == starttime)
{
notegroup.Add(midinotes[i]);
i++;
}
/* Create a single chord from the group of midi notes with
* the same start time.
*/
ChordSymbol chord = new ChordSymbol(notegroup, key, time, clef, this);
chords.Add(chord);
}
return(chords);
}
CreateStaffsForTrack(List <MusicSymbol> symbols, int measurelen,
KeySignature key, MidiOptions options,
int track, int totaltracks)
{
int keysigWidth = KeySignatureWidth(key);
int startindex = 0;
List <Staff> thestaffs = new List <Staff>(symbols.Count / 50);
while (startindex < symbols.Count)
{
/* startindex is the index of the first symbol in the staff.
* endindex is the index of the last symbol in the staff.
*/
int endindex = startindex;
int width = keysigWidth;
int maxwidth;
/* If we're scrolling vertically, the maximum width is PageWidth. */
if (scrollVert)
{
maxwidth = SheetMusic.PageWidth;
}
else
{
maxwidth = 2000000;
}
while (endindex < symbols.Count &&
width + symbols[endindex].Width < maxwidth)
{
width += symbols[endindex].Width;
endindex++;
}
endindex--;
/* There's 3 possibilities at this point:
* 1. We have all the symbols in the track.
* The endindex stays the same.
*
* 2. We have symbols for less than one measure.
* The endindex stays the same.
*
* 3. We have symbols for 1 or more measures.
* Since measures cannot span multiple staffs, we must
* make sure endindex does not occur in the middle of a
* measure. We count backwards until we come to the end
* of a measure.
*/
if (endindex == symbols.Count - 1)
{
/* endindex stays the same */
}
else if (symbols[startindex].StartTime / measurelen ==
symbols[endindex].StartTime / measurelen)
{
/* endindex stays the same */
}
else
{
int endmeasure = symbols[endindex + 1].StartTime / measurelen;
while (symbols[endindex].StartTime / measurelen ==
endmeasure)
{
endindex--;
}
}
int range = endindex + 1 - startindex;
if (scrollVert)
{
width = SheetMusic.PageWidth;
}
Staff staff = new Staff(symbols.GetRange(startindex, range),
key, options, track, totaltracks);
thestaffs.Add(staff);
startindex = endindex + 1;
}
return(thestaffs);
}
/** Create a new SheetMusic control.
* MidiFile is the parsed midi file to display.
* SheetMusic Options are the menu options that were selected.
*
* - Apply all the Menu Options to the MidiFile tracks.
* - Calculate the key signature
* - For each track, create a list of MusicSymbols (notes, rests, bars, etc)
* - Vertically align the music symbols in all the tracks
* - Partition the music notes into horizontal staffs
*/
public void init(MidiFile file, MidiOptions options)
{
if (options == null)
{
options = new MidiOptions(file);
}
zoom = 1.0f;
filename = file.FileName;
SetColors(options.colors, options.shadeColor, options.shade2Color);
pen = new Pen(Color.Black, 1);
List <MidiTrack> tracks = file.ChangeMidiNotes(options);
SetNoteSize(options.largeNoteSize);
scrollVert = options.scrollVert;
showNoteLetters = options.showNoteLetters;
TimeSignature time = file.Time;
if (options.time != null)
{
time = options.time;
}
if (options.key == -1)
{
mainkey = GetKeySignature(tracks);
}
else
{
mainkey = new KeySignature(options.key);
}
numtracks = tracks.Count;
int lastStart = file.EndTime() + options.shifttime;
/* Create all the music symbols (notes, rests, vertical bars, and
* clef changes). The symbols variable contains a list of music
* symbols for each track. The list does not include the left-side
* Clef and key signature symbols. Those can only be calculated
* when we create the staffs.
*/
List <MusicSymbol>[] symbols = new List <MusicSymbol> [numtracks];
for (int tracknum = 0; tracknum < numtracks; tracknum++)
{
MidiTrack track = tracks[tracknum];
ClefMeasures clefs = new ClefMeasures(track.Notes, time.Measure);
List <ChordSymbol> chords = CreateChords(track.Notes, mainkey, time, clefs);
symbols[tracknum] = CreateSymbols(chords, clefs, time, lastStart);
}
List <LyricSymbol>[] lyrics = null;
if (options.showLyrics)
{
lyrics = GetLyrics(tracks);
}
/* Vertically align the music symbols */
SymbolWidths widths = new SymbolWidths(symbols, lyrics);
// SymbolWidths widths = new SymbolWidths(symbols);
AlignSymbols(symbols, widths);
staffs = CreateStaffs(symbols, mainkey, options, time.Measure);
CreateAllBeamedChords(symbols, time);
if (lyrics != null)
{
AddLyricsToStaffs(staffs, lyrics);
}
/* After making chord pairs, the stem directions can change,
* which affects the staff height. Re-calculate the staff height.
*/
foreach (Staff staff in staffs)
{
staff.CalculateHeight();
}
BackColor = Color.White;
SetZoom(1.0f);
}
private SheetMusic sheetmusic; /** Used to get colors and other options */
/** Create a new Chord Symbol from the given list of midi notes.
* All the midi notes will have the same start time. Use the
* key signature to get the white key and accidental symbol for
* each note. Use the time signature to calculate the duration
* of the notes. Use the clef when drawing the chord.
*/
public ChordSymbol(List <MidiNote> midinotes, KeySignature key,
TimeSignature time, Clef c, SheetMusic sheet)
{
int len = midinotes.Count;
int i;
hastwostems = false;
clef = c;
sheetmusic = sheet;
starttime = midinotes[0].StartTime;
endtime = midinotes[0].EndTime;
for (i = 0; i < midinotes.Count; i++)
{
if (i > 1)
{
if (midinotes[i].Number < midinotes[i - 1].Number)
{
throw new System.ArgumentException("Chord notes not in increasing order by number");
}
}
endtime = Math.Max(endtime, midinotes[i].EndTime);
}
notedata = CreateNoteData(midinotes, key, time);
accidsymbols = CreateAccidSymbols(notedata, clef);
/* Find out how many stems we need (1 or 2) */
NoteDuration dur1 = notedata[0].duration;
NoteDuration dur2 = dur1;
int change = -1;
for (i = 0; i < notedata.Length; i++)
{
dur2 = notedata[i].duration;
if (dur1 != dur2)
{
change = i;
break;
}
}
if (dur1 != dur2)
{
/* We have notes with different durations. So we will need
* two stems. The first stem points down, and contains the
* bottom note up to the note with the different duration.
*
* The second stem points up, and contains the note with the
* different duration up to the top note.
*/
hastwostems = true;
stem1 = new Stem(notedata[0].whitenote,
notedata[change - 1].whitenote,
dur1,
Stem.Down,
NotesOverlap(notedata, 0, change)
);
stem2 = new Stem(notedata[change].whitenote,
notedata[notedata.Length - 1].whitenote,
dur2,
Stem.Up,
NotesOverlap(notedata, change, notedata.Length)
);
}
else
{
/* All notes have the same duration, so we only need one stem. */
int direction = StemDirection(notedata[0].whitenote,
notedata[notedata.Length - 1].whitenote,
clef);
stem1 = new Stem(notedata[0].whitenote,
notedata[notedata.Length - 1].whitenote,
dur1,
direction,
NotesOverlap(notedata, 0, notedata.Length)
);
stem2 = null;
}
/* For whole notes, no stem is drawn. */
if (dur1 == NoteDuration.Whole)
{
stem1 = null;
}
if (dur2 == NoteDuration.Whole)
{
stem2 = null;
}
width = MinWidth;
}
