/// <summary>
/// 绘制窗体边框
/// </summary>
/// <param name="destForm">需要绘制边框的窗体</param>
/// <param name="g">绘制边框所用的绘图对象</param>
/// <param name="fringeImg">边框图片</param>
/// <param name="radius">边框的圆角矩形</param>
public static void DrawFormFringe(Form destForm, Graphics g, Image fringeImg,
int radius)
{
DrawNineRect(
g,
fringeImg,
new Rectangle(-radius, -radius, destForm.ClientSize.Width + 2 * radius, destForm.ClientSize.Height + 2 * radius),
new Rectangle(0, 0, fringeImg.Width, fringeImg.Height));
}
/// <summary>
/// 画九宫图
/// </summary>
/// <param name="g">绘图对象</param>
/// <param name="img">所需绘制的图片</param>
/// <param name="DestRect">目标矩形</param>
/// <param name="SrcRect">来源矩形</param>
public static void DrawNineRect(Graphics g, Image img, Rectangle DestRect, Rectangle SrcRect)
{
int offset = 5;
Rectangle NineRect =
new Rectangle(img.Width / 2 - offset, img.Height / 2 - offset, 2 * offset, 2 * offset);
int x = 0, y = 0, nWidth, nHeight;
int xSrc = 0, ySrc = 0, nSrcWidth, nSrcHeight;
int nDestWidth, nDestHeight;
nDestWidth = DestRect.Width;
nDestHeight = DestRect.Height;
// 左上-------------------------------------;
x = DestRect.Left;
y = DestRect.Top;
nWidth = NineRect.Left - SrcRect.Left;
nHeight = NineRect.Top - SrcRect.Top;
xSrc = SrcRect.Left;
ySrc = SrcRect.Top;
g.DrawImage(img,
new Rectangle(x, y, nWidth, nHeight), xSrc, ySrc, nWidth, nHeight, GraphicsUnit.Pixel);
// 上-------------------------------------;
x = DestRect.Left + NineRect.Left - SrcRect.Left;
nWidth = nDestWidth - nWidth - (SrcRect.Right - NineRect.Right);
xSrc = NineRect.Left;
nSrcWidth = NineRect.Right - NineRect.Left;
nSrcHeight = NineRect.Top - SrcRect.Top;
g.DrawImage(img,
new Rectangle(x, y, nWidth, nHeight), xSrc, ySrc, nSrcWidth, nSrcHeight, GraphicsUnit.Pixel);
// 右上-------------------------------------;
x = DestRect.Right - (SrcRect.Right - NineRect.Right);
nWidth = SrcRect.Right - NineRect.Right;
xSrc = NineRect.Right;
g.DrawImage(img,
new Rectangle(x, y, nWidth, nHeight), xSrc, ySrc, nWidth, nHeight, GraphicsUnit.Pixel);
// 左-------------------------------------;
x = DestRect.Left;
y = DestRect.Top + NineRect.Top - SrcRect.Top;
nWidth = NineRect.Left - SrcRect.Left;
nHeight = DestRect.Bottom - y - (SrcRect.Bottom - NineRect.Bottom);
xSrc = SrcRect.Left;
ySrc = NineRect.Top;
nSrcWidth = NineRect.Left - SrcRect.Left;
nSrcHeight = NineRect.Bottom - NineRect.Top;
g.DrawImage(img,
new Rectangle(x, y, nWidth, nHeight), xSrc, ySrc, nSrcWidth, nSrcHeight, GraphicsUnit.Pixel);
// 中-------------------------------------;
x = DestRect.Left + NineRect.Left - SrcRect.Left;
nWidth = nDestWidth - nWidth - (SrcRect.Right - NineRect.Right);
xSrc = NineRect.Left;
nSrcWidth = NineRect.Right - NineRect.Left;
g.DrawImage(img,
new Rectangle(x, y, nWidth, nHeight), xSrc, ySrc, nSrcWidth, nSrcHeight, GraphicsUnit.Pixel);
// 右-------------------------------------;
x = DestRect.Right - (SrcRect.Right - NineRect.Right);
nWidth = SrcRect.Right - NineRect.Right;
xSrc = NineRect.Right;
nSrcWidth = SrcRect.Right - NineRect.Right;
g.DrawImage(img,
new Rectangle(x, y, nWidth, nHeight), xSrc, ySrc, nSrcWidth, nSrcHeight, GraphicsUnit.Pixel);
// 左下-------------------------------------;
x = DestRect.Left;
y = DestRect.Bottom - (SrcRect.Bottom - NineRect.Bottom);
nWidth = NineRect.Left - SrcRect.Left;
nHeight = SrcRect.Bottom - NineRect.Bottom;
xSrc = SrcRect.Left;
ySrc = NineRect.Bottom;
g.DrawImage(img,
new Rectangle(x, y, nWidth, nHeight), xSrc, ySrc, nWidth, nHeight, GraphicsUnit.Pixel);
// 下-------------------------------------;
x = DestRect.Left + NineRect.Left - SrcRect.Left;
nWidth = nDestWidth - nWidth - (SrcRect.Right - NineRect.Right);
xSrc = NineRect.Left;
nSrcWidth = NineRect.Right - NineRect.Left;
nSrcHeight = SrcRect.Bottom - NineRect.Bottom;
g.DrawImage(img,
new Rectangle(x, y, nWidth, nHeight), xSrc, ySrc, nSrcWidth, nSrcHeight, GraphicsUnit.Pixel);
// 右下-------------------------------------;
x = DestRect.Right - (SrcRect.Right - NineRect.Right);
nWidth = SrcRect.Right - NineRect.Right;
xSrc = NineRect.Right;
g.DrawImage(img,
new Rectangle(x, y, nWidth, nHeight), xSrc, ySrc, nWidth, nHeight, GraphicsUnit.Pixel);
}
转载于:https://www.cnblogs.com/yixiong/p/3199877.html
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