protected override void OnPaint(PaintEventArgs e)
{
Graphics g = e.Graphics;
if (Parent != null)
{
g.FillRectangle(new SolidBrush(Parent.BackColor), ClientRectangle);
}
g.SmoothingMode = SmoothingMode.AntiAlias;
Rectangle backgroundRect = new Rectangle(
ClientRectangle.X,
ClientRectangle.Y,
ClientRectangle.Width - 1,
ClientRectangle.Height - 1);
if (FillBackground)
{
if (!_isSelected)
{
if (RadioButtonFlatStyle)
{
LinearGradientBrush gradient = new LinearGradientBrush(backgroundRect, BackColor.Lighten(5), BackColor.Darken(25), LinearGradientMode.Vertical);
g.FillPath(gradient, ExtendedForms.RoundedRect(backgroundRect, BorderRadius));
}
else
{
g.FillPath(new SolidBrush(BackColor), ExtendedForms.RoundedRect(backgroundRect, BorderRadius));
}
if (_useDarckenColorForBorder)
{
g.DrawPath(new Pen(BackColor.Darken(80), 1), ExtendedForms.RoundedRect(backgroundRect, BorderRadius));
}
else
{
g.DrawPath(new Pen(BorderColor, 1), ExtendedForms.RoundedRect(backgroundRect, BorderRadius));
}
}
else
{
if (RadioButtonFlatStyle)
{
LinearGradientBrush gradient = new LinearGradientBrush(backgroundRect, BackColor.Lighten(30), BackColor.Lighten(15), LinearGradientMode.Vertical);
g.FillPath(gradient, ExtendedForms.RoundedRect(backgroundRect, BorderRadius));
}
else
{
g.FillPath(new SolidBrush(BackColor.Lighten(30)), ExtendedForms.RoundedRect(backgroundRect, BorderRadius));
}
if (_useDarckenColorForBorder)
{
g.DrawPath(new Pen(BorderColor.Lighten(20), 1), ExtendedForms.RoundedRect(backgroundRect, BorderRadius));
}
else
{
g.DrawPath(new Pen(BorderColor, 1), ExtendedForms.RoundedRect(backgroundRect, BorderRadius));
}
}
}
int dotDiameter = ThumbRadius;
int thumbY = ClientRectangle.Height / 2 - dotDiameter / 2 - 1;
RectangleF innerRect = new RectangleF(Padding.Left + Spacing, thumbY, dotDiameter, dotDiameter);
int textX = ( int )innerRect.Left + ( int )innerRect.Width + Spacing;
SolidBrush thumbBackBrush = null;
Pen thumbBorderPen = new Pen(ThumbColor, 2);
SolidBrush thumbDotBrush = new SolidBrush(ThumbColor);
if (_isSelected)
{
thumbBackBrush = _whiteBrush;
thumbBorderPen = (RadioButtonFlatStyle) ?
thumbBorderPen = new Pen(BackColor.Darken(120), 2) :
thumbBorderPen = new Pen(ThumbColor, 2);
}
else
{
thumbBackBrush = _whiteBrush;
thumbBorderPen = (RadioButtonFlatStyle) ?
thumbBorderPen = new Pen(BackColor.Darken(130), 2) :
thumbBorderPen = new Pen(ThumbColor, 2);
}
int count = (Checked || _isSelected) ? 2 : 1;
for (int i = 0; i < count; i++)
{
if (RoundedThumb)
{
g.FillEllipse(((Checked || _isSelected) && i > 0) ? thumbDotBrush : thumbBackBrush, innerRect);
g.DrawEllipse(thumbBorderPen, innerRect);
}
else
{
g.FillRectangle(thumbBackBrush, innerRect);
g.DrawRectangle(thumbBorderPen, innerRect.X, innerRect.Y, innerRect.Width, innerRect.Height);
}
innerRect.Inflate(-4, -4);
}
StringFormat sf = new StringFormat();
sf.LineAlignment = StringAlignment.Center;
sf.Alignment = StringAlignment.Near;
sf.FormatFlags = StringFormatFlags.NoWrap;
innerRect = new RectangleF(textX, 1, ClientRectangle.Width - 1 - dotDiameter - 2, ClientRectangle.Height - 3);
SolidBrush textBrush = (ForeColor == Color.Black) ? _blackBrush : new SolidBrush(ForeColor);
g.DrawString(Text, Font, textBrush, innerRect, sf);
}