private Point[] GetKnobLine(int l)
{
var pret = new Point[2];
float cx = _knobPoint.X;
float cy = _knobPoint.Y;
float radius = _knobRectangle.Width / 2;
float degree = (_deltaAngle * Value) / (_maximum - _minimum);
degree = MathManager.DegreeToRadians(degree + _startAngle);
Point Pos = new Point(0, 0);
Pos.X = (int)(cx + ((radius - (_drawRatio * 10)) * Math.Cos(degree)));
Pos.Y = (int)(cy + ((radius - (_drawRatio * 10)) * Math.Sin(degree)));
pret[0] = new Point(Pos.X, Pos.Y);
Pos.X = (int)(cx + ((radius - (_drawRatio * 10) - l) * Math.Cos(degree)));
Pos.Y = (int)(cy + ((radius - (_drawRatio * 10) - l) * Math.Sin(degree)));
pret[1] = new Point(Pos.X, Pos.Y);
return(pret);
}
private Point GetKnobPosition(int l)
{
float cx = _knobPoint.X;
float cy = _knobPoint.Y;
float radius = _knobRectangle.Width / 2;
float degree = (_deltaAngle * Value) / (_maximum - _minimum);
degree = MathManager.DegreeToRadians(degree + _startAngle);
Point Pos = new Point(0, 0)
{
X = (int)(cx + ((radius - (KnobDistance * _drawRatio)) * Math.Cos(degree))), Y = (int)(cy + ((radius - (KnobDistance * _drawRatio)) * Math.Sin(degree)))
};
return(Pos);
}
private bool DrawDivisions(Graphics graphics, RectangleF rectangleF)
{
if (this == null)
{
return(false);
}
float cx = _knobPoint.X;
float cy = _knobPoint.Y;
float w = rectangleF.Width;
float h = rectangleF.Height;
float tx;
float ty;
float incr = MathManager.DegreeToRadians((_endAngle - _startAngle) / ((_scaleDivisions - 1) * (_scaleSubDivisions + 1)));
float currentAngle = MathManager.DegreeToRadians(_startAngle);
float radius = _knobRectangle.Width / 2;
float rulerValue = _minimum;
Pen penL = new Pen(TickColor, 2 * _drawRatio);
Pen penS = new Pen(TickColor, 1 * _drawRatio);
SolidBrush br = new SolidBrush(ForeColor);
PointF ptStart = new PointF(0, 0);
PointF ptEnd = new PointF(0, 0);
var n = 0;
if (_showLargeScale)
{
for (; n < _scaleDivisions; n++)
{
// draw divisions
ptStart.X = (float)(cx + (radius * Math.Cos(currentAngle)));
ptStart.Y = (float)(cy + (radius * Math.Sin(currentAngle)));
ptEnd.X = (float)(cx + ((radius + (w / 50)) * Math.Cos(currentAngle)));
ptEnd.Y = (float)(cy + ((radius + (w / 50)) * Math.Sin(currentAngle)));
graphics.DrawLine(penL, ptStart, ptEnd);
// Draw graduations Strings
float fSize = 6F * _drawRatio;
if (fSize < 6)
{
fSize = 6;
}
Font font = new Font(Font.FontFamily, fSize);
double val = Math.Round(rulerValue);
string str = string.Format("{0,0:D}", (int)val);
SizeF size = graphics.MeasureString(str, font);
if (_drawDivInside)
{
// graduations strings inside the knob
tx = (float)(cx + ((radius - (11 * _drawRatio)) * Math.Cos(currentAngle)));
ty = (float)(cy + ((radius - (11 * _drawRatio)) * Math.Sin(currentAngle)));
}
else
{
// graduation strings outside the knob
tx = (float)(cx + ((radius + (11 * _drawRatio)) * Math.Cos(currentAngle)));
ty = (float)(cy + ((radius + (11 * _drawRatio)) * Math.Sin(currentAngle)));
}
graphics.DrawString(str,
font,
br,
tx - (float)(size.Width * 0.5),
ty - (float)(size.Height * 0.5));
rulerValue += (_maximum - _minimum) / (_scaleDivisions - 1);
if (n == _scaleDivisions - 1)
{
font.Dispose();
break;
}
// Subdivisions
if (_scaleDivisions <= 0)
{
currentAngle += incr;
}
else
{
for (var j = 0; j <= _scaleSubDivisions; j++)
{
currentAngle += incr;
// if user want to display small graduations
if (_showSmallScale)
{
ptStart.X = (float)(cx + (radius * Math.Cos(currentAngle)));
ptStart.Y = (float)(cy + (radius * Math.Sin(currentAngle)));
ptEnd.X = (float)(cx + ((radius + (w / 50)) * Math.Cos(currentAngle)));
ptEnd.Y = (float)(cy + ((radius + (w / 50)) * Math.Sin(currentAngle)));
graphics.DrawLine(penS, ptStart, ptEnd);
}
}
}
font.Dispose();
}
}
return(true);
}
private void DrawKnobTop()
{
Point knobTopPoint = new Point((_knobRectangle.X + (_knobRectangle.Width / 2)) - (KnobTopSize.Width / 2), (_knobRectangle.Y + (_knobRectangle.Height / 2)) - (KnobTopSize.Height / 2));
Rectangle knobTopRectangle = new Rectangle(knobTopPoint, KnobTopSize);
_offGraphics.FillEllipse(_knobTop.Brush, knobTopRectangle);
GraphicsPath borderPath = new GraphicsPath();
borderPath.AddEllipse(knobTopRectangle);
VisualBorderRenderer.DrawBorderStyle(_offGraphics, _knobTopBorder, borderPath, State);
float cx = _knobPoint.X;
float cy = _knobPoint.Y;
float w = KnobTopSize.Width;
// TODO: Adjust
float incr = MathManager.DegreeToRadians((_startAngle - _endAngle) / ((_buttonDivisions - 1) * (_scaleSubDivisions + 1)));
float currentAngle = MathManager.DegreeToRadians(0);
float radius = KnobTickSize.Width / 2;
Pen penL = new Pen(TickColor, 2 * _drawRatio);
PointF ptStart = new PointF(0, 0);
PointF ptEnd = new PointF(0, 0);
var n = 0;
for (; n < _buttonDivisions; n++)
{
// draw divisions
ptStart.X = (float)(cx + (radius * Math.Cos(currentAngle)));
ptStart.Y = (float)(cy + (radius * Math.Sin(currentAngle)));
ptEnd.X = (float)(cx + ((radius + (w / 50)) * Math.Cos(currentAngle)));
ptEnd.Y = (float)(cy + ((radius + (w / 50)) * Math.Sin(currentAngle)));
// TODO: draw lines along button border
// gOffScreen.DrawLine(penL, ptStart, ptEnd);
// Draw graduations Strings
float fSize = 6F * _drawRatio;
if (fSize < 6)
{
fSize = 6;
}
Font font = new Font(Font.FontFamily, fSize);
if (n == _buttonDivisions - 1)
{
font.Dispose();
break;
}
// Subdivisions
if (_buttonDivisions <= 0)
{
currentAngle += incr;
}
else
{
for (var j = 0; j <= _scaleSubDivisions; j++)
{
currentAngle += incr;
}
}
font.Dispose();
}
}