/// <summary>
/// Moves this horizontal beamBlock vertically until it is on the right side (above or below)
/// the noteheads, and as close as possible to the noteheads.
/// If there is only a single (quaver) beam, it ends up with its inner edge one octave from
/// the OriginY of the closest notehead in the group.
/// Otherwise the smallest distance between any beam and the closest notehead will be a sixth.
/// </summary>
/// <returns></returns>
private void MoveToNoteheads(List <ChordMetrics> chordsMetrics, Dictionary <DurationClass, float> durationClassBeamThickness)
{
float staffOriginY = Chords[0].Voice.Staff.Metrics.OriginY;
if (_stemDirection == VerticalDir.down)
{
float lowestBottom = float.MinValue;
for (int i = 0; i < Chords.Count; ++i)
{
ChordMetrics chordMetrics = chordsMetrics[i];
HeadMetrics bottomHeadMetrics = chordMetrics.BottomHeadMetrics;
float beamBottom =
bottomHeadMetrics.OriginY + durationClassBeamThickness[Chords[i].DurationClass];
if (((bottomHeadMetrics.OriginY - staffOriginY) % _gap) != 0)
{
beamBottom += (_gap * 2.5F);
}
else
{
beamBottom += (_gap * 2.65F);
}
lowestBottom = lowestBottom > beamBottom ? lowestBottom : beamBottom;
}
if (Beams.Count == 1) // only a quaver beam
{
lowestBottom += _gap;
}
Move(lowestBottom - staffOriginY);
}
else // stems up
{
float highestTop = float.MaxValue;
for (int i = 0; i < Chords.Count; ++i)
{
ChordMetrics chordMetrics = chordsMetrics[i];
HeadMetrics topHeadMetrics = chordMetrics.TopHeadMetrics;
float beamTop =
topHeadMetrics.OriginY - durationClassBeamThickness[Chords[i].DurationClass];
if (((topHeadMetrics.OriginY - staffOriginY) % _gap) != 0)
{
beamTop -= (_gap * 2.5F);
}
else
{
beamTop -= (_gap * 2.65F);
}
highestTop = highestTop < beamTop ? highestTop : beamTop;
}
if (Beams.Count == 1) // only a quaver beam
{
highestTop -= _gap;
}
Move(highestTop - staffOriginY);
}
}
/// <summary>
/// Used when creating temporary heads for chord alignment purposes.
/// </summary>
public HeadMetrics(HeadMetrics otherHead, DurationClass durationClass)
: base(durationClass, false, otherHead.FontHeight)
{
// move to position of other head
Move(otherHead.OriginX - _originX, otherHead.OriginY - OriginY);
float horizontalPadding = otherHead.FontHeight * 0.04F;
_leftStemX = _left;
_rightStemX = _right;
_left -= horizontalPadding;
_right += horizontalPadding;
}
/// <summary>
/// Used when creating temporary heads for chord alignment purposes.
/// </summary>
public HeadMetrics(HeadMetrics otherHead, DurationClass durationClass)
: base(durationClass, otherHead.FontHeight, CSSObjectClass.none)
{
// move to position of other head
Move(otherHead.OriginX - _originX, otherHead.OriginY - OriginY);
double horizontalPadding = otherHead.FontHeight * 0.04;
_leftStemX = _left;
_rightStemX = _right;
_left -= horizontalPadding;
_right += horizontalPadding;
}
/// <summary>
/// Notehead metrics.Left and metrics.Right include horizontal padding,
/// so head overlaps cannot be checked using the standard Metrics.Overlaps function.
/// </summary>
public bool OverlapsHead(HeadMetrics otherHeadMetrics)
{
// See the above constructor. Sorry, I didnt want to save the value in every Head!
float thisHorizontalPadding = this._fontHeight * 0.04F;
float thisRealLeft = _left + thisHorizontalPadding;
float thisRealRight = _right - thisHorizontalPadding;
float otherHorizontalPadding = otherHeadMetrics.FontHeight * 0.04F;
float otherRealLeft = otherHeadMetrics.Left + thisHorizontalPadding;
float otherRealRight = otherHeadMetrics.Right - thisHorizontalPadding;
bool verticalOverlap = this.Bottom >= otherHeadMetrics.Top && this.Top <= otherHeadMetrics.Bottom;
bool horizontalOverlap = thisRealRight >= otherRealLeft && thisRealLeft <= otherRealRight;
return(verticalOverlap && horizontalOverlap);
}
/// <summary>
/// The distance between the inner edge of this beamBlock and the headmetrics.
/// This is a positive value
/// a) if the _stemDirection is VerticalDir.up and the headMetrics is completely below this beamBlock,
/// or b) if the _stemDirection is VerticalDir.down and the headMetrics is completely above this beamBlock.
/// </summary>
private float VerticalDistanceToHead(HeadMetrics headMetrics, float headMsPosition)
{
float headX = headMetrics.OriginX;
float headY = headMetrics.Top;
float minDistanceToHead = float.MaxValue;
float tanA = this.TanAngle;
if (_stemDirection == VerticalDir.up)
{
float beamBottomAtHeadY;
foreach (Beam beam in Beams)
{
float beamBeginMsPosition = BeamBeginMsPosition(beam);
float beamEndMsPosition = BeamEndMsPosition(beam);
if (beamBeginMsPosition <= headMsPosition && beamEndMsPosition >= headMsPosition)
{
beamBottomAtHeadY = beam.LeftTopY - ((headX - beam.LeftX) * tanA) + _beamThickness;
float distanceToHead = headY - beamBottomAtHeadY;
minDistanceToHead = minDistanceToHead < distanceToHead ? minDistanceToHead : distanceToHead;
}
}
}
else // _stemDirection == VerticalDir.down
{
headY = headMetrics.Bottom;
float beamTopAtHeadY;
foreach (Beam beam in Beams)
{
float beamBeginMsPosition = BeamBeginMsPosition(beam);
float beamEndMsPosition = BeamEndMsPosition(beam);
if (beamBeginMsPosition <= headMsPosition && beamEndMsPosition >= headMsPosition)
{
beamTopAtHeadY = beam.LeftTopY - ((headX - beam.LeftX) * tanA);
float distanceToHead = beamTopAtHeadY - headY;
minDistanceToHead = minDistanceToHead < distanceToHead ? minDistanceToHead : distanceToHead;
}
}
}
return(minDistanceToHead);
}
/// <summary>
/// The distance between the inner edge of this beamBlock and the headmetrics.
/// This is a positive value
/// a) if the _stemDirection is VerticalDir.up and the headMetrics is completely below this beamBlock,
/// or b) if the _stemDirection is VerticalDir.down and the headMetrics is completely above this beamBlock.
/// </summary>
private float VerticalDistanceToHead(HeadMetrics headMetrics, float headMsPosition)
{
float headX = headMetrics.OriginX;
float headY = headMetrics.Top;
float minDistanceToHead = float.MaxValue;
float tanA = this.TanAngle;
if(_stemDirection == VerticalDir.up)
{
float beamBottomAtHeadY;
foreach(Beam beam in Beams)
{
float beamBeginMsPosition = BeamBeginMsPosition(beam);
float beamEndMsPosition = BeamEndMsPosition(beam);
if(beamBeginMsPosition <= headMsPosition && beamEndMsPosition >= headMsPosition)
{
beamBottomAtHeadY = beam.LeftTopY - ((headX - beam.LeftX) * tanA) + _beamThickness;
float distanceToHead = headY - beamBottomAtHeadY;
minDistanceToHead = minDistanceToHead < distanceToHead ? minDistanceToHead : distanceToHead;
}
}
}
else // _stemDirection == VerticalDir.down
{
headY = headMetrics.Bottom;
float beamTopAtHeadY;
foreach(Beam beam in Beams)
{
float beamBeginMsPosition = BeamBeginMsPosition(beam);
float beamEndMsPosition = BeamEndMsPosition(beam);
if(beamBeginMsPosition <= headMsPosition && beamEndMsPosition >= headMsPosition)
{
beamTopAtHeadY = beam.LeftTopY - ((headX - beam.LeftX) * tanA);
float distanceToHead = beamTopAtHeadY - headY;
minDistanceToHead = minDistanceToHead < distanceToHead ? minDistanceToHead : distanceToHead;
}
}
}
return minDistanceToHead;
}
/// <summary>
/// chord.Heads are in top-down order.
/// </summary>
private void SetHeadsMetrics(ChordSymbol chord, float ledgerlineStemStrokeWidth)
{
_headsMetricsTopDown = new List<HeadMetrics>();
HeadMetrics hMetrics = new HeadMetrics(chord, null, _gap); // the head is horizontally aligned at 0 by default.
float horizontalShift = hMetrics.RightStemX - hMetrics.LeftStemX - (ledgerlineStemStrokeWidth / 2F); // the distance to shift left or right if heads would collide
float shiftRange = _gap * 0.75F;
if(chord.Stem.Direction == VerticalDir.up)
{
List<Head> bottomUpHeads = new List<Head>();
foreach(Head head in chord.HeadsTopDown)
bottomUpHeads.Insert(0, head);
List<HeadMetrics> bottomUpMetrics = new List<HeadMetrics>();
foreach(Head head in bottomUpHeads)
{
float newHeadOriginY = head.GetOriginY(_clef, _gap); // note that the CHORD's originY is always at the top line of the staff
float newHeadAlignX = 0F;
foreach(Metrics headMetric in bottomUpMetrics)
{
float existingHeadAlignX = (headMetric.Left + headMetric.Right) / 2F;
if((newHeadOriginY == headMetric.OriginY)
|| (existingHeadAlignX == 0F
&& newHeadAlignX < (existingHeadAlignX + horizontalShift)
&& newHeadOriginY > (headMetric.OriginY - shiftRange)))
{
newHeadAlignX = existingHeadAlignX + horizontalShift; // shifts more than once for extreme clusters ( e.g. F,F#,G)
}
else
newHeadAlignX = 0;
}
HeadMetrics headMetrics = new HeadMetrics(chord, head, _gap);
headMetrics.Move(newHeadAlignX, newHeadOriginY); // moves head.originY to headY
bottomUpMetrics.Add(headMetrics);
}
for(int i = bottomUpMetrics.Count - 1; i >= 0; --i)
{
_headsMetricsTopDown.Add(bottomUpMetrics[i]);
}
}
else // stem is down
{
foreach(Head head in chord.HeadsTopDown)
{
float newHeadOriginY = head.GetOriginY(_clef, _gap); // note that the CHORD's originY is always at the top line of the staff
float newHeadAlignX = 0F;
foreach(HeadMetrics headMetric in _headsMetricsTopDown)
{
float existingHeadAlignX = (headMetric.Left + headMetric.Right) / 2F;
if((newHeadOriginY == headMetric.OriginY)
|| (existingHeadAlignX == 0F
&& newHeadAlignX < (existingHeadAlignX + horizontalShift)
&& newHeadOriginY < (headMetric.OriginY + shiftRange)))
{
newHeadAlignX -= horizontalShift; // can shift left more than once
}
else
newHeadAlignX = 0;
}
HeadMetrics headMetrics = new HeadMetrics(chord, head, _gap);
headMetrics.Move(newHeadAlignX, newHeadOriginY); // moves head.originY to headY
_headsMetricsTopDown.Add(headMetrics);
}
}
Debug.Assert(_originX == 0F);
Debug.Assert(_headsMetricsTopDown.Count == chord.HeadsTopDown.Count);
}
/// <summary>
/// Returns the stem which the otherChordTopDownHeadsMetrics would have if their duration class was crotchet.
/// DummyStemMetrics are used when aligning synchronous chords.
/// </summary>
private StemMetrics DummyStemMetrics(
List<HeadMetrics> otherChordTopDownHeadsMetrics,
VerticalDir stemDirection,
float fontHeight,
Metrics flagsBlockMetrics,
BeamBlock beamBlock,
float strokeWidth)
{
List<HeadMetrics> tempTopDownHeadsMetrics = new List<HeadMetrics>();
foreach(HeadMetrics headMetrics in otherChordTopDownHeadsMetrics)
{
HeadMetrics newHeadMetrics = new HeadMetrics(headMetrics, DurationClass.crotchet);
tempTopDownHeadsMetrics.Add(newHeadMetrics);
}
return NewStemMetrics(tempTopDownHeadsMetrics, stemDirection, fontHeight, flagsBlockMetrics, beamBlock, strokeWidth);
}
/// <summary>
/// Notehead metrics.Left and metrics.Right include horizontal padding,
/// so head overlaps cannot be checked using the standard Metrics.Overlaps function.
/// </summary>
public bool OverlapsHead(HeadMetrics otherHeadMetrics)
{
// See the above constructor. Sorry, I didnt want to save the value in every Head!
float thisHorizontalPadding = this._fontHeight * 0.04F;
float thisRealLeft = _left + thisHorizontalPadding;
float thisRealRight = _right - thisHorizontalPadding;
float otherHorizontalPadding = otherHeadMetrics.FontHeight * 0.04F;
float otherRealLeft = otherHeadMetrics.Left + thisHorizontalPadding;
float otherRealRight = otherHeadMetrics.Right - thisHorizontalPadding;
bool verticalOverlap = this.Bottom >= otherHeadMetrics.Top && this.Top <= otherHeadMetrics.Bottom;
bool horizontalOverlap = thisRealRight >= otherRealLeft && thisRealLeft <= otherRealRight;
return verticalOverlap && horizontalOverlap;
}
/// <summary>
/// Used when creating temporary heads for chord alignment purposes.
/// </summary>
public HeadMetrics(HeadMetrics otherHead, DurationClass durationClass)
: base(durationClass, false, otherHead.FontHeight)
{
// move to position of other head
Move(otherHead.OriginX - _originX, otherHead.OriginY - OriginY);
float horizontalPadding = otherHead.FontHeight * 0.04F;
_leftStemX = _left;
_rightStemX = _right;
_left -= horizontalPadding;
_right += horizontalPadding;
}
