/** Notes with the same start times in different staffs should be
* vertically aligned. The SymbolWidths class is used to help
* vertically align symbols.
*
* First, each track should have a symbol for every starttime that
* appears in the Midi File. If a track doesn't have a symbol for a
* particular starttime, then add a "blank" symbol for that time.
*
* Next, make sure the symbols for each start time all have the same
* width, across all tracks. The SymbolWidths class stores
* - The symbol width for each starttime, for each track
* - The maximum symbol width for a given starttime, across all tracks.
*
* The method SymbolWidths.GetExtraWidth() returns the extra width
* needed for a track to match the maximum symbol width for a given
* starttime.
*/
private void AlignSymbols(List<MusicSymbol>[] allsymbols, SymbolWidths widths)
{
for (int track = 0; track < allsymbols.Length; track++) {
List<MusicSymbol> symbols = allsymbols[track];
List<MusicSymbol> result = new List<MusicSymbol>();
int i = 0;
/* If a track doesn't have a symbol for a starttime,
* add a blank symbol.
*/
foreach (int start in widths.StartTimes) {
/* BarSymbols are not included in the SymbolWidths calculations */
while (i < symbols.Count && (symbols[i] is BarSymbol) &&
symbols[i].StartTime <= start) {
result.Add(symbols[i]);
i++;
}
if (i < symbols.Count && symbols[i].StartTime == start) {
while (i < symbols.Count &&
symbols[i].StartTime == start) {
result.Add(symbols[i]);
i++;
}
}
else {
result.Add(new BlankSymbol(start, 0));
}
}
/* For each starttime, increase the symbol width by
* SymbolWidths.GetExtraWidth().
*/
i = 0;
while (i < result.Count) {
if (result[i] is BarSymbol) {
i++;
continue;
}
int start = result[i].StartTime;
int extra = widths.GetExtraWidth(track, start);
result[i].Width += extra;
/* Skip all remaining symbols with the same starttime. */
while (i < result.Count && result[i].StartTime == start) {
i++;
}
}
allsymbols[track] = result;
}
}
/** Create a new SheetMusic control, using the given midi filename.
* The options can be null.
*/
//public SheetMusic(string filename, MidiOptions options) {
// MidiFile file = new MidiFile(filename);
// init(file, options);
//}
/** Create a new SheetMusic control, using the given raw midi byte[] data.
* The options can be null.
*/
//public SheetMusic(byte[] data, string title, MidiOptions options) {
// MidiFile file = new MidiFile(data, title);
// init(file, options);
// }
/** 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 Load(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();
}
braces = CreateBraceSymbols(staffs);
BackColor = Color.White;
SetStyle(ControlStyles.UserPaint, true);
SetStyle(ControlStyles.AllPaintingInWmPaint, true); // ��ֹ��������.
SetStyle(ControlStyles.DoubleBuffer, true);
}
void AlignSymbols(List <MusicSymbol>[] allsymbols, SymbolWidths widths)
{
for (int track = 0; track < allsymbols.Length; track++)
{
List <MusicSymbol> symbols = allsymbols[track];
List <MusicSymbol> result = new List <MusicSymbol>();
int i = 0;
/* If a track doesn't have a symbol for a starttime,
* add a blank symbol.
*/
foreach (int start in widths.StartTimes)
{
/* BarSymbols are not included in the SymbolWidths calculations */
while (i < symbols.Count && (symbols[i] is BarSymbol) &&
symbols[i].StartTime <= start)
{
result.Add(symbols[i]);
i++;
}
if (i < symbols.Count && symbols[i].StartTime == start)
{
while (i < symbols.Count &&
symbols[i].StartTime == start)
{
result.Add(symbols[i]);
i++;
}
}
else
{
result.Add(new BlankSymbol(start, 0));
}
}
/* For each starttime, increase the symbol width by
* SymbolWidths.GetExtraWidth().
*/
i = 0;
while (i < result.Count)
{
if (result[i] is BarSymbol)
{
i++;
continue;
}
int start = result[i].StartTime;
int extra = widths.GetExtraWidth(track, start);
result[i].Width += extra;
/* Skip all remaining symbols with the same starttime. */
while (i < result.Count && result[i].StartTime == start)
{
i++;
}
}
allsymbols[track] = result;
}
}
/** 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);
}
public void TestStartTimes()
{
List<MusicSymbol>[] tracks = new List<MusicSymbol>[3];
for (int i = 0; i < 3; i++) {
List<MusicSymbol> symbols = new List<MusicSymbol>();
for (int j = 0; j < 5; j++) {
symbols.Add(new TestSymbol(i*10 + j, 10));
}
tracks[i] = symbols;
}
SymbolWidths s = new SymbolWidths(tracks, null);
int[] starttimes = s.StartTimes;
int index = 0;
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 5; j++) {
Assert.AreEqual(starttimes[index], i*10 + j);
index++;
}
}
}
public void TestGetExtraWidth()
{
List<MusicSymbol>[] tracks = new List<MusicSymbol>[3];
for (int i = 0; i < 3; i++) {
List<MusicSymbol> symbols = new List<MusicSymbol>();
symbols.Add(new TestSymbol(100, i*4));
tracks[i] = symbols;
}
SymbolWidths s = new SymbolWidths(tracks, null);
int extra = s.GetExtraWidth(0, 100);
Assert.AreEqual(extra, 8);
extra = s.GetExtraWidth(1, 100);
Assert.AreEqual(extra, 4);
extra = s.GetExtraWidth(2, 100);
Assert.AreEqual(extra, 0);
tracks[0].Add(new TestSymbol(200, 6));
s = new SymbolWidths(tracks, null);
extra = s.GetExtraWidth(0, 200);
Assert.AreEqual(extra, 0);
extra = s.GetExtraWidth(1, 200);
Assert.AreEqual(extra, 6);
extra = s.GetExtraWidth(2, 200);
Assert.AreEqual(extra, 6);
}