protected void PaintSignImage(IGraphics g, PointF pos, SizeF sz)
{
Graphics underlayGraphics = (Graphics)g.UnderlayGraphics;
Image image = this.cachedSignImage;
if (this.Opacity != 1.0)
{
image = (Image) new Bitmap(this.cachedSignImage);
ImageHelper.ApplyAlpha(image as Bitmap, Convert.ToSingle(this.Opacity));
}
underlayGraphics.DrawImageUnscaledAndClipped(image, Rectangle.Round(new RectangleF(pos, sz)));
}
/// <summary>
/// Paints the sign
/// </summary>
/// <param name="g">The IGraphics to use fo painting the sign</param>
/// <param name="signRect">Rectangle containing sign bounds</param>
protected virtual void PaintSign(IGraphics g, Rectangle signRect)
{
Rectangle signRealRectangle = Rectangle.Empty;
if (this.SignStyle == SignStyles.Image)
{
if (cachedSignImage != null)
{
int centerX = Math.Max(0, (this.Size.Width - cachedSignImage.Width) / 2);
int centerY = Math.Max(0, (this.Size.Height - cachedSignImage.Height) / 2);
Point pos = new Point(Math.Max(0, centerX), Math.Max(0, centerY));
pos.X = Math.Min(pos.X, this.Size.Width);
pos.Y = Math.Min(pos.Y, this.Size.Height);
Size sz = new Size(
Math.Min(this.Size.Width, cachedSignImage.Size.Width),
Math.Min(this.Size.Height, cachedSignImage.Size.Height));
Graphics rawGraphics = (Graphics)g.UnderlayGraphics;
Image imageToDraw = cachedSignImage;
if (this.Opacity != 1)
{
imageToDraw = new Bitmap(cachedSignImage);
ImageHelper.ApplyAlpha(imageToDraw as Bitmap, Convert.ToSingle(this.Opacity));
}
rawGraphics.DrawImageUnscaledAndClipped(imageToDraw, new Rectangle(pos, sz));
signRealRectangle = new Rectangle(pos, sz);
}
}
else
{
if (signRect.Width <= SignWidth || signRect.Height <= SignWidth)
{
return;
}
using (Pen pen = new Pen(this.ForeColor, SignWidth))
{
pen.Alignment = PenAlignment.Inset;
Graphics gr = (Graphics)g.UnderlayGraphics;
if (this.SignStyle == SignStyles.PlusMinus)
{
if (this.Expanded)
{
gr.DrawLine(pen, signRect.Left, signRect.Top + signRect.Height / 2, signRect.Right, signRect.Top + signRect.Height / 2);
}
else
{
gr.DrawLine(pen, signRect.Left, signRect.Top + signRect.Height / 2, signRect.Right, signRect.Top + signRect.Height / 2);
gr.DrawLine(pen, signRect.Left + signRect.Width / 2, signRect.Top, signRect.Left + signRect.Width / 2, signRect.Bottom);
}
}
else if (this.SignStyle == SignStyles.Arrow)
{
if (this.Expanded)
{
gr.DrawLine(pen, signRect.Left, signRect.Bottom, signRect.Left + signRect.Width / 2, signRect.Top);
gr.DrawLine(pen, signRect.Left + signRect.Width / 2, signRect.Top, signRect.Right, signRect.Bottom);
}
else
{
gr.DrawLine(pen, signRect.Left, signRect.Top, signRect.Left + signRect.Width / 2, signRect.Bottom);
gr.DrawLine(pen, signRect.Left + signRect.Width / 2, signRect.Bottom, signRect.Right, signRect.Top);
}
}
else if (this.SignStyle == SignStyles.Triangle)
{
using (SolidBrush brush = new SolidBrush(this.ForeColor))
{
if (this.Expanded)
{
Point point1 = new Point(signRect.X, signRect.Bottom);
Point point2 = new Point(signRect.Right, signRect.Bottom);
Point point3 = new Point(signRect.X + signRect.Width / 2, signRect.Y);
Point[] trianglePoints = new Point[] { point1, point2, point3 };
gr.FillPolygon(brush, trianglePoints);
}
else
{
Point point1 = new Point(signRect.X, signRect.Y);
Point point2 = new Point(signRect.X + signRect.Width / 2, signRect.Bottom);
Point point3 = new Point(signRect.Right, signRect.Y);
Point[] trianglePoints = new Point[] { point1, point2, point3 };
gr.FillPolygon(brush, trianglePoints);
}
}
}
}
}
}