/// <summary>
/// Paints control adornments.
/// </summary>
/// <param name="e">The <see cref="PaintEventArgs"/> instance containing the event data.</param>
protected virtual void PaintAdornments(PaintEventArgs e)
{
Point point;
point = this.ValueToPoint(this.Value);
// divider
if (this.ShowValueDivider)
{
Point start;
Point end;
IntPtr hdc;
if (this.Orientation == Orientation.Horizontal)
{
start = new Point(point.X, this.BarBounds.Top);
end = new Point(point.X, this.BarBounds.Bottom);
}
else
{
start = new Point(this.BarBounds.Left, point.Y);
end = new Point(this.BarBounds.Right, point.Y);
}
// draw a XOR'd line using Win32 API as this functionality isn't part of .NET
hdc = e.Graphics.GetHdc();
NativeMethods.SetROP2(hdc, NativeConstants.R2_NOT);
NativeMethods.MoveToEx(hdc, start.X, start.Y, IntPtr.Zero);
NativeMethods.LineTo(hdc, end.X, end.Y);
e.Graphics.ReleaseHdc(hdc);
}
// drag nub
if (this.NubStyle != ColorSliderNubStyle.None && this.SelectionGlyph != null)
{
int x;
int y;
if (this.Orientation == Orientation.Horizontal)
{
x = point.X - this.NubSize.Width / 2;
if (this.NubStyle == ColorSliderNubStyle.BottomRight)
{
y = this.BarBounds.Bottom;
}
else
{
y = this.BarBounds.Top - this.NubSize.Height;
}
}
else
{
y = point.Y - this.NubSize.Height / 2;
if (this.NubStyle == ColorSliderNubStyle.BottomRight)
{
x = this.BarBounds.Right;
}
else
{
x = this.BarBounds.Left - this.NubSize.Width;
}
}
e.Graphics.DrawImage(this.SelectionGlyph, x, y);
}
// focus
if (this.Focused)
{
ControlPaint.DrawFocusRectangle(e.Graphics, Rectangle.Inflate(this.BarBounds, -2, -2));
}
}