protected override void OnDraw()
{
// 绘制定位线
if (Cursor)
{
int tempStart = Start - 2 + Num * _note.GetSymbolWidth();
DrawLine(tempStart, 0, tempStart, ParamsGetter.GetTotalHeight());
}
// 乐符纵坐标
int yPosition = ParamsGetter.GetStaffCenterPosition() + _note.GetShift();
int shift = _note.GetShift() / ParamsGetter.GetPitchPositionDiff();
// 偏移线，当超过6的时候会画线。传入参数为shift，因为以左下角为原点
DrawShiftLine(shift);
// 绘制变音记号
DrawAccidental(_note.GetAccidental(), yPosition);
if (_note.GetDot() == 1)
{
DrawPoint(Start + ParamsGetter.GetDotePosition(), yPosition);
}
if (Type == 1) // 全音符
{
DrawSymbol("\uE12B", Start, yPosition);
if (_note.HasChord())
{
DrawChord();
}
}
else
{
if (Type == 2) // 二分之一音符
{
DrawSymbol("\uE12C", Start, yPosition);
}
else // 其余的所有
{
DrawSymbol("\uE12D", Start, yPosition);
}
if (_note.IsUpOrDown())
{
_stemX = Start + ParamsGetter.GetNoteRightShift(); // 符干向上时横坐标向右偏移
_stemY = yPosition; // 符干向上时纵坐标与乐符中心纵坐标位置相同
_tailX = Start + ParamsGetter.GetNoteTailUpLandscapeShift();
_tailY = _stemY + ParamsGetter.GetNoteStemHeight() - ParamsGetter.GetNoteTailDownPortraitShift();
}
else
{
_stemX = Start - ParamsGetter.GetNoteLeftShift(); // 符干向下时横坐标向左偏移
_stemY = yPosition - ParamsGetter.GetNoteStemDownShift(); // 符干向下时纵坐标与乐符中心纵坐标位置偏移
_tailX = Start - ParamsGetter.GetNoteTailDownLandscapeShift();
_tailY = _stemY - ParamsGetter.GetNoteStemHeight() + ParamsGetter.GetNoteTailDownPortraitShift();
}
_beamX = _stemX;
_beamY = _note.GetEnd();
if (_note.HasChord())
{
if (_note.IsUpOrDown())
{
int temp = _note.GetShift();
foreach (Note noteChord in _note.GetChordList())
{
if (temp > noteChord.GetShift())
{
temp = noteChord.GetShift();
}
}
_tailY = temp + ParamsGetter.GetNoteStemHeight();
}
DrawChord();
}
DrawStem(); // 画符干
if (_note.IsSlur())
{
DrawBeam(); // 画符杠
}
else
{
DrawTail();
}
}
}
// 绘制偏移线
private void DrawShiftLine(int shift)
{
if (shift > 4)
{
int num = (shift - 4) / 2 + 1;
for (int i = 1; i < num; i++)
{
int y = ParamsGetter.GetStaffCenterPosition() + (4 + 2 * i) * ParamsGetter.GetPitchPositionDiff();
DrawLine(Start - 4 - ParamsGetter.GetNoteLeftShift(), y, Start + 4 + ParamsGetter.GetNoteRightShift(), y);
}
}
else if (shift < -4)
{
int num = (-4 - shift) / 2 + 1;
for (int i = 1; i < num; i++)
{
int y = ParamsGetter.GetStaffCenterPosition() - (4 + 2 * i) * ParamsGetter.GetPitchPositionDiff();
DrawLine(Start - 4 - ParamsGetter.GetNoteLeftShift(), y, Start + 4 + ParamsGetter.GetNoteRightShift(), y);
}
}
}
