/// <summary>
/// Recursive function.
/// </summary>
private void MoveLeftOfExistingAccidentals(List<AccidentalMetrics> existingAccidentals, int index, AccidentalMetrics accidental)
{
// This delta is very important. Without it, an accidental will collide with the accidental above it,
// if the upper accidental has been moved left. For example, chord (D1,G1,D2) with an accidental on each notehead.
float xDelta = accidental.FontHeight * 0.001F;
for(int i = index; i < existingAccidentals.Count; i++)
{
Metrics existingAccidental = existingAccidentals[i];
if(existingAccidental.Overlaps(accidental))
{
if(existingAccidental.OriginY < (accidental.OriginY - (_gap * 1.75)))
{
if(accidental.ID_Type == "n")
xDelta = accidental.FontHeight * -0.05F;
else if(accidental.ID_Type == "b")
xDelta = accidental.FontHeight * -0.14F;
//else if(accidental.ID_Type == "#")
// xDelta = accidental.FontHeight * 0.03F;
}
accidental.Move(existingAccidental.Left - xDelta - accidental.Right, 0);
}
if(i < (existingAccidentals.Count - 1))
MoveLeftOfExistingAccidentals(existingAccidentals, i + 1, accidental);
}
}
/// <summary>
/// The accidental is at the correct height (accidental.OriginY == head.OriginY),
/// but it has not yet been added to this.MetricsList, or used to set this chord's Boundary.
/// The accidental is now moved left, such that it does not overlap noteheads, stem, ledgerlines or accidentals.
/// It is added to this.MetricsList after this function returns.
/// </summary>
private void MoveAccidentalLeft(AccidentalMetrics accidentalMetrics, List<HeadMetrics> topDownHeadsMetrics,
StemMetrics stemMetrics,
LedgerlineBlockMetrics upperLedgerlineBlockMetrics, LedgerlineBlockMetrics lowerLedgerlineBlockMetrics,
List<AccidentalMetrics> existingAccidentalsMetrics)
{
#region move left of ledgerline block
if(upperLedgerlineBlockMetrics != null)
{
MoveAccidentalLeftOfLedgerlineBlock(accidentalMetrics, upperLedgerlineBlockMetrics);
}
if(lowerLedgerlineBlockMetrics != null)
{
MoveAccidentalLeftOfLedgerlineBlock(accidentalMetrics, lowerLedgerlineBlockMetrics);
}
#endregion
#region move left of noteheads
float topRange = accidentalMetrics.OriginY - (_gap * 1.51F);
float bottomRange = accidentalMetrics.OriginY + (_gap * 1.51F);
foreach(HeadMetrics head in topDownHeadsMetrics)
{
if(head.OriginY > topRange && head.OriginY < bottomRange && head.Overlaps(accidentalMetrics))
{
float extraHorizontalSpace = 0;
if(accidentalMetrics.ID_Type == "b")
extraHorizontalSpace = accidentalMetrics.FontHeight * -0.03F;
accidentalMetrics.Move(head.Left - extraHorizontalSpace - accidentalMetrics.Right, 0);
}
}
#endregion
#region move left of stem (can be in another chord)
if(stemMetrics != null)
{
// Note that the length of the stem is ignored here.
float maxRight = stemMetrics.Left - stemMetrics.StrokeWidth;
if(maxRight < accidentalMetrics.Right)
accidentalMetrics.Move(maxRight - accidentalMetrics.Right, 0F);
}
#endregion
#region move accidental left of existing accidentals
MoveLeftOfExistingAccidentals(existingAccidentalsMetrics, 0, accidentalMetrics);
#endregion
}
private void MoveAccidentalLeftOfLedgerlineBlock(AccidentalMetrics accidentalM, LedgerlineBlockMetrics ledgerlineBlockM)
{
Debug.Assert(accidentalM != null && ledgerlineBlockM != null);
//float top = ledgerlineBlockM.Top - (_gap * 0.51F);
//float bottom = ledgerlineBlockM.Bottom + (_gap * 0.51F);
float top = ledgerlineBlockM.Top - (_gap * 1.01F);
float bottom = ledgerlineBlockM.Bottom + (_gap * 1.01F);
if(accidentalM.OriginY > top && accidentalM.OriginY < bottom)
accidentalM.Move(ledgerlineBlockM.Left - accidentalM.Right, 0F);
}
private void CreateLedgerlineAndAccidentalMetrics(float fontHeight, List<Head> topDownHeads, List<HeadMetrics> topDownHeadsMetrics, float ledgerlineStemStrokeWidth)
{
float limbLength = (topDownHeadsMetrics[0].RightStemX - topDownHeadsMetrics[0].LeftStemX) / 2F; // change to taste later
_upperLedgerlineBlockMetrics = CreateUpperLedgerlineBlock(topDownHeadsMetrics, limbLength, ledgerlineStemStrokeWidth);
_lowerLedgerlineBlockMetrics = CreateLowerLedgerlineBlock(topDownHeadsMetrics, limbLength, ledgerlineStemStrokeWidth);
List<AccidentalMetrics> existingAccidentalsMetrics = new List<AccidentalMetrics>();
for(int i = 0; i < topDownHeads.Count; i++)
{
HeadMetrics headMetrics = topDownHeadsMetrics[i];
Head head = topDownHeads[i];
if(head.DisplayAccidental == DisplayAccidental.force)
{
AccidentalMetrics accidentalMetrics = new AccidentalMetrics(head, fontHeight, _gap);
accidentalMetrics.Move(headMetrics.OriginX, headMetrics.OriginY);
MoveAccidentalLeft(accidentalMetrics, topDownHeadsMetrics, _stemMetrics,
_upperLedgerlineBlockMetrics, _lowerLedgerlineBlockMetrics,
existingAccidentalsMetrics);
existingAccidentalsMetrics.Add(accidentalMetrics);
if(_topDownAccidentalsMetrics == null)
_topDownAccidentalsMetrics = new List<AccidentalMetrics>();
this._topDownAccidentalsMetrics.Add(accidentalMetrics);
}
}
}