/// <summary>
/// Moves rests onto the top and bottom stafflines. Most rests move two gaps from the centre staffline,
/// but breve and semibreve rests in the top voice move to a position 1 gap above the top staffline, and
/// breve and semibreve rests in the bottom voice move onto the bottom staffline.
/// Breve and semibreve rests outside the stafflines have a single, visible "ledgerline".
/// </summary>
private void MoveRestsOntoOuterStafflines()
{
for (int voiceIndex = 0; voiceIndex < 2; ++voiceIndex)
{
foreach (NoteObject noteObject in Voices[voiceIndex].NoteObjects)
{
RestSymbol rest = noteObject as RestSymbol;
if (rest != null)
{
RestMetrics metrics = (RestMetrics)rest.Metrics;
if (voiceIndex == 0)
{
if (rest.DurationClass == DurationClass.breve || rest.DurationClass == DurationClass.semibreve)
{
metrics.LedgerlineVisible = true; // only affects breves, semibreves and minims
}
metrics.Move(0F, this.Gap * -2);
}
else
{
if (rest.DurationClass == DurationClass.breve || rest.DurationClass == DurationClass.semibreve)
{
metrics.Move(0F, this.Gap * 3);
}
else
{
metrics.Move(0F, this.Gap * 2);
}
}
}
}
}
}
private void AdjustRestRestCollisions()
{
List <NoteObject> upperObjects = Voices[0].NoteObjects;
List <NoteObject> lowerObjects = Voices[1].NoteObjects;
// If a rest in the top voice collides with a rest in the lower voice at the same msPosition,
// both rests are moved in gap steps outwards until they no longer overlap.
foreach (NoteObject topObject in upperObjects)
{
RestSymbol topRest = topObject as RestSymbol;
if (topRest != null)
{
RestMetrics upperRestMetrics = topRest.Metrics as RestMetrics;
foreach (NoteObject lowerObject in lowerObjects)
{
RestSymbol lowerRestSymbol = lowerObject as RestSymbol;
if (lowerRestSymbol != null)
{
if (topRest.MsPosition < lowerRestSymbol.MsPosition)
{
break;
}
if (topRest.MsPosition == lowerRestSymbol.MsPosition)
{
RestMetrics lowerRestMetrics = (RestMetrics)lowerRestSymbol.Metrics;
float verticalOverlap = lowerRestMetrics.OverlapHeight(upperRestMetrics, 0F);
bool moveBottomRest = true;
while (verticalOverlap > 0)
{
float newMinBottom = upperRestMetrics.Bottom - verticalOverlap;
if (upperRestMetrics.Bottom > newMinBottom)
{
if (moveBottomRest)
{
lowerRestMetrics.LedgerlineVisible = true; // only affects breves, semibreves and minims
lowerRestMetrics.Move(0F, Gap);
moveBottomRest = false;
}
else
{
upperRestMetrics.LedgerlineVisible = true; // only affects breves, semibreves and minims
upperRestMetrics.Move(0F, -Gap);
moveBottomRest = true;
}
}
verticalOverlap = lowerRestMetrics.OverlapHeight(upperRestMetrics, 0F);
}
}
}
}
}
}
}
private void AdjustRestsForVerticalChordCollisions(int restsChannelIndex)
{
Debug.Assert(restsChannelIndex == 0 || restsChannelIndex == 1);
List <NoteObject> restObjects;
List <NoteObject> chordObjects;
bool shiftRestUp;
if (restsChannelIndex == 0)
{
shiftRestUp = true;
restObjects = Voices[0].NoteObjects;
chordObjects = Voices[1].NoteObjects;
}
else
{
shiftRestUp = false;
restObjects = Voices[1].NoteObjects;
chordObjects = Voices[0].NoteObjects;
}
// Move rests in the top voice up by gap increments if they are synchronous with an overlapping chord in the lower voice.
// Move rests in the bottom voice down by gap increments if they are synchronous with an overlapping chord in the top voice.
foreach (NoteObject restObject in restObjects)
{
RestSymbol restSymbol = restObject as RestSymbol;
if (restSymbol != null)
{
foreach (NoteObject chordObject in chordObjects)
{
OutputChordSymbol chordSymbol = chordObject as OutputChordSymbol;
if (chordSymbol != null)
{
if (chordSymbol.MsPosition > restSymbol.MsPosition)
{
break;
}
if (chordSymbol.MsPosition == restSymbol.MsPosition)
{
RestMetrics restMetrics = restSymbol.RestMetrics;
ChordMetrics chordMetrics = chordSymbol.ChordMetrics;
//float verticalOverlap = chordMetrics.OverlapHeight(restMetrics, Gap / 2F);
float verticalOverlap = chordMetrics.OverlapHeight(restMetrics, 0F);
if (verticalOverlap > 0)
{
if (shiftRestUp)
{
//float newMaxBottom = chordMetrics.Top - Gap;
float newMaxBottom = chordMetrics.Top;
newMaxBottom += DurationClassDeltaAbove(restSymbol.DurationClass, Gap);
while (restMetrics.Bottom > newMaxBottom)
{
restMetrics.LedgerlineVisible = true; // only affects breves, semibreves and minims
restMetrics.Move(0F, -Gap);
}
break; // to next rest symbol
}
else
{
//float newMinTop = chordMetrics.Bottom + Gap;
float newMinTop = chordMetrics.Bottom;
newMinTop += DurationClassDeltaBelow(restSymbol.DurationClass, Gap);
while (restMetrics.Top < newMinTop)
{
restMetrics.LedgerlineVisible = true; // only affects breves, semibreves and minims
restMetrics.Move(0F, Gap);
}
break; // to next rest symbol
}
}
}
}
}
}
}
}