/// <summary>
/// 高斯-勒让德算法 super pi 使用
/// </summary>
/// <returns></returns>
public static decimal CalculatePi_SuperPi_decimal()
{
decimal a = 1;
decimal b = 1 / MathCommon.Sqrt(2m);
decimal t = 1 / (decimal)4;
decimal p = 1;
int maxN = 10;
for (int n = 0; n < maxN; ++n)
{
decimal nextA = (a + b) / 2;
decimal nextB = MathCommon.Sqrt(a * b);
decimal nextT = t - p * (a - nextA) * (a - nextA);
decimal nextP = 2 * p;
a = nextA;
b = nextB;
t = nextT;
p = nextP;
}
decimal pi = (a + b) * (a + b) / (4 * t);
return(pi);
}
/// <summary>
/// 根据插入点所在的容器来修正图片元素的大小
/// </summary>
/// <param name="document">文档对象</param>
/// <param name="element">图片元素</param>
public static void CheckImageSizeWhenInsertImage(DomDocument document, DomImageElement element)
{
if (document.Options.EditOptions.FixWidthWhenInsertImage)
{
DomContainerElement container = null;
int elementIndex = 0;
document.Content.GetCurrentPositionInfo(out container, out elementIndex);
container = container.ContentElement;
SizeF size = new SizeF(element.Width, element.Height);
size = MathCommon.FixSize(
new SizeF(container.ClientWidth - document.PixelToDocumentUnit(2), 100000),
size,
element.KeepWidthHeightRate);
element.Width = size.Width;
element.Height = size.Height;
}
}
/// <summary>
/// 使用指定图形绘制对象从指定位置开始绘制页面框架
/// </summary>
/// <param name="g">图形绘制对象</param>
/// <param name="ClipRectangle">剪切矩形</param>
public void DrawPageFrame(
System.Drawing.Graphics g,
System.Drawing.Rectangle ClipRectangle)
{
using (RectangleDrawer drawer = new RectangleDrawer())
{
drawer.Bounds = this.myBounds;
drawer.RoundRadio = 9;
if (this.intBorderColor.A != 0 && this.intBorderWidth > 0)
{
drawer.BorderPen = new System.Drawing.Pen(
this.intBorderColor,
this.intBorderWidth);
}
if (this.intBackColor.A != 0)
{
drawer.FillBrush = new System.Drawing.SolidBrush(this.intBackColor);
}
if (drawer.Draw(g, ClipRectangle))
{
if (myBackgroundImage != null)
{
// 绘制页面背景图片
Rectangle ir = new Rectangle(
myBounds.Left,
myBounds.Top,
myBounds.Width,
myBounds.Height);
if (ClipRectangle.IsEmpty == false)
{
ir = System.Drawing.Rectangle.Intersect(ir, ClipRectangle);
}
if (ir.IsEmpty == false)
{
using (TextureBrush brush = new TextureBrush(myBackgroundImage))
{
brush.WrapMode = System.Drawing.Drawing2D.WrapMode.Tile;
float rate = (float)GraphicsUnitConvert.GetRate(
g.PageUnit,
System.Drawing.GraphicsUnit.Pixel);
brush.TranslateTransform(
myBounds.Left,
myBounds.Top);
brush.ScaleTransform(rate, rate);
g.FillRectangle(brush, ir);
} //using
drawer.DrawBorder(g, ClipRectangle);
} //if
//Rectangle ir = new Rectangle(
// myBounds.Left + this.LeftMargin,
// myBounds.Top + this.TopMargin,
// myBounds.Width - this.LeftMargin - this.RightMargin,
// myBounds.Height - this.TopMargin - this.BottomMargin);
//if (ClipRectangle.IsEmpty == false)
//{
// ir = System.Drawing.Rectangle.Intersect(ir, ClipRectangle);
//}
//if (ir.IsEmpty == false)
//{
// using (TextureBrush brush = new TextureBrush(myBackgroundImage))
// {
// brush.WrapMode = System.Drawing.Drawing2D.WrapMode.Tile;
// float rate = (float)GraphicsUnitConvert.GetRate(
// g.PageUnit,
// System.Drawing.GraphicsUnit.Pixel);
// brush.TranslateTransform(
// myBounds.Left + this.LeftMargin,
// myBounds.Top + this.TopMargin);
// brush.ScaleTransform(rate, rate);
// g.FillRectangle(brush, ir);
// }//using
//}//if
}
if (this.bolDrawMargin &&
this.intMarginLineColor.A != 0 &&
this.intMarginLineLength > 0)
{
System.Drawing.Rectangle rect = new System.Drawing.Rectangle(
myBounds.Left + this.intLeftMargin - 1,
myBounds.Top + this.intTopMargin,
myBounds.Width - this.intLeftMargin - this.intRightMargin + 2,
myBounds.Height - this.intTopMargin - this.intBottomMargin);
System.Drawing.Point[] ps = new System.Drawing.Point[16];
ps[0] = rect.Location;
ps[1].X = rect.Left - intMarginLineLength;
ps[1].Y = rect.Top;
ps[2] = ps[0];
ps[3].X = rect.Left;
ps[3].Y = rect.Top - intMarginLineLength;
ps[4].X = rect.Right;
ps[4].Y = rect.Top;
ps[5].X = rect.Right + intMarginLineLength;
ps[5].Y = rect.Top;
ps[6] = ps[4];
ps[7].X = rect.Right;
ps[7].Y = rect.Top - intMarginLineLength;
ps[8].X = rect.Right;
ps[8].Y = rect.Bottom;
ps[9].X = rect.Right + intMarginLineLength;
ps[9].Y = rect.Bottom;
ps[10] = ps[8];
ps[11].X = rect.Right;
ps[11].Y = rect.Bottom + intMarginLineLength;
ps[12].X = rect.Left;
ps[12].Y = rect.Bottom;
ps[13].X = rect.Left;
ps[13].Y = rect.Bottom + intMarginLineLength;
ps[14] = ps[12];
ps[15].X = rect.Left - intMarginLineLength;
ps[15].Y = rect.Bottom;
MathCommon.RectangleClipLines(myBounds, ps);
using (System.Drawing.Pen p = new System.Drawing.Pen(
this.intMarginLineColor, 1))
{
for (int iCount = 0; iCount < ps.Length; iCount += 2)
{
g.DrawLine(p, ps[iCount], ps[iCount + 1]);
}
} //using( System.Drawing.Pen p = new System.Drawing.Pen( this.intMarginLineColor , 1 ))
} //if( this.bolDrawMargin && this.intMarginLineColor.A != 0 )
} //if( drawer.Draw( g , ClipRectangle ))
} //using( RectangleDrawer drawer = new RectangleDrawer() )
} //public void DrawPageFrame()
