//paint slider
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
Rectangle bandrct = this.GetBandRectangle();
if (bandrct.Width < 1 || bandrct.Height < 1)
{
return;
}
//forecolor adjust
Color forecolor =
this._fadetype == FadeType.Internal?
ColorUtility.AoverB(this.GetSelectedColor(), Color.Silver): //blended with checker
this.BackColor;
if (_highlighted)
{
forecolor = ColorUtility.MaxContrastRBTo(forecolor); //color
}
else
{
forecolor = ColorUtility.MaxContrastTo(forecolor); //blackwhite
}
int position;
//start painting
switch (_orientation)
{
case Orientation.Horizontal:
#region horizontal
//horizontal stretching
_grd.Transform = new Matrix(
(float)bandrct.Width + 2f, 0f, 0f, 1f, (float)bandrct.X - 1f, 0f);
//fill band
e.Graphics.FillRectangle(_checker, bandrct);
e.Graphics.FillRectangle(_grd, bandrct);
//draw position
e.Graphics.SmoothingMode = SmoothingMode.AntiAlias;
position = bandrct.X + (bandrct.Width * _position) / 100;
if (_fadetype == FadeType.External) //triangle select
{
using (SolidBrush sld = new SolidBrush(forecolor))
{
e.Graphics.FillPolygon(sld, new Point[] { //upper triangle
new Point(position + 3, 0),
new Point(position, 5),
new Point(position - 3, 0)
});
e.Graphics.FillPolygon(sld, new Point[] { //lower triangle
new Point(position + 3, this.Height - 1),
new Point(position, this.Height - 6),
new Point(position - 3, this.Height - 1)
});
}
}
else //bracket select
{
using (Pen pn = new Pen(forecolor))
{
e.Graphics.DrawLines(pn, new Point[] { //left bracket
new Point(position - 1, 0),
new Point(position - 3, 0),
new Point(position - 3, this.Height - 1),
new Point(position - 1, this.Height - 1)
});
e.Graphics.DrawLines(pn, new Point[] { //right bracket
new Point(position + 1, 0),
new Point(position + 3, 0),
new Point(position + 3, this.Height - 1),
new Point(position + 1, this.Height - 1)
});
}
}
#endregion
break;
case Orientation.Vertical:
#region vertical
//horizontal stretching
//vertical stretching and rotating
_grd.Transform = new Matrix(
0f, (float)bandrct.Width + 2f, 1f, 0f, 0f, (float)bandrct.Y + 1f);
//fill band
e.Graphics.FillRectangle(_checker, bandrct);
e.Graphics.FillRectangle(_grd, bandrct);
//draw position
e.Graphics.SmoothingMode = SmoothingMode.AntiAlias;
position = bandrct.Y + (bandrct.Height * _position) / 100;
if (_fadetype == FadeType.External) //triangle select
{
using (SolidBrush sld = new SolidBrush(forecolor))
{
e.Graphics.FillPolygon(sld, new Point[] { //left triangle
new Point(0, position + 3),
new Point(5, position),
new Point(0, position - 3)
});
e.Graphics.FillPolygon(sld, new Point[] { //lower triangle
new Point(this.Width - 1, position + 3),
new Point(this.Width - 6, position),
new Point(this.Width - 1, position - 3)
});
}
}
else //bracket select
{
using (Pen pn = new Pen(forecolor))
{
e.Graphics.DrawLines(pn, new Point[] { //left bracket
new Point(0, position - 1),
new Point(0, position - 3),
new Point(this.Width - 1, position - 3),
new Point(this.Width - 1, position - 1)
});
e.Graphics.DrawLines(pn, new Point[] { //right bracket
new Point(0, position + 1),
new Point(0, position + 3),
new Point(this.Width - 1, position + 3),
new Point(this.Width - 1, position + 1)
});
}
}
#endregion
break;
}
}