public ChordMetrics(System.Drawing.Graphics graphics, ChordSymbol chord, VerticalDir voiceStemDirection, float gap, float stemStrokeWidthVBPX)
: base()
{
_top = float.MaxValue;
_right = float.MinValue;
_bottom = float.MinValue;
_left = float.MaxValue;
_drawObjects = chord.DrawObjects;
_gap = gap;
// The _objectType is written to the SVG file as a group name, but is otherwise not used.
if(chord is CautionaryChordSymbol)
_objectType = "cautionary chord";
else
_objectType = "chord";
GetStaffParameters(chord); // sets _clef to the most recent clef, and _nStafflines.
// For each component, find its characterID, deltaX and deltaY re the chord's origin.
// The chord's x-origin is the centre of the outermost notehead.
// (deltaX of the outermost notehead is 0.)
// The chord's y-origin is the top line of the staff.
// (deltaY of a notehead on the top line of the staff is 0.)
if(chord.BeamBlock != null && chord.BeamBlock.Chords[0] == chord)
this.BeamBlock = chord.BeamBlock;
SetHeadsMetrics(chord, stemStrokeWidthVBPX);
if(chord.Stem.Draw) // false for cautionary chords
SetStemAndFlags(chord, _headsMetricsTopDown, stemStrokeWidthVBPX);
// if the chord is part of a beamGroup, the stem tips are all at one height here.
// These objects are created with originX and originY at 0,0 (the chord's origin).
CreateLedgerlineAndAccidentalMetrics(chord.FontHeight, chord.HeadsTopDown, _headsMetricsTopDown, stemStrokeWidthVBPX);
CautionaryChordSymbol cautionaryChordSymbol = chord as CautionaryChordSymbol;
if(cautionaryChordSymbol != null)
{
CreateCautionaryBracketsMetrics(cautionaryChordSymbol);
}
else
{
bool dynamicIsBelow;
bool ornamentIsBelow;
_lyricMetrics = NewLyricMetrics(chord.Voice.StemDirection, graphics, gap);
GetRelativePositions(chord.Voice.StemDirection, _lyricMetrics, out ornamentIsBelow, out dynamicIsBelow);
_ornamentMetrics = NewOrnamentMetrics(graphics, gap, ornamentIsBelow);
_dynamicMetrics = NewDynamicMetrics(gap, dynamicIsBelow);
MoveAuxilliaries(chord.Stem.Direction, gap);
}
SetExternalBoundary();
}
/// <summary>
/// returns null if there is no lyric in the _drawObjects
/// </summary>
/// <param name="graphics"></param>
/// <param name="gap"></param>
/// <param name="lyricIsBelow"></param>
/// <returns></returns>
private LyricMetrics NewLyricMetrics(VerticalDir voiceStemDirection, Graphics graphics, float gap)
{
LyricText lyric = null;
foreach(DrawObject drawObject in _drawObjects)
{
lyric = drawObject as LyricText;
if(lyric != null)
break;
}
_lyricMetrics = null;
if(lyric != null)
{
bool lyricIsBelow = true; // voiceStemDirection == VerticalDir.none || voiceStemDirection == VerticalDir.down
if(voiceStemDirection == VerticalDir.up)
lyricIsBelow = false;
lyric.Metrics = new LyricMetrics(gap, graphics, lyric.TextInfo, lyricIsBelow);
_lyricMetrics = (LyricMetrics)lyric.Metrics;
}
return _lyricMetrics;
}
private void GetRelativePositions(VerticalDir voiceStemDirection, LyricMetrics lyricMetrics,
out bool ornamentIsBelow, out bool dynamicIsBelow)
{
dynamicIsBelow = true;
ornamentIsBelow = false;
switch(voiceStemDirection)
{
case VerticalDir.none:
// a 1-Voice staff
if(lyricMetrics != null && lyricMetrics.IsBelow)
dynamicIsBelow = false;
break;
case VerticalDir.up:
// top voice of a 2-Voice staff
dynamicIsBelow = false;
ornamentIsBelow = false;
break;
case VerticalDir.down:
// bottom voice of a 2-Voice staff
dynamicIsBelow = true;
ornamentIsBelow = true;
break;
}
}
