以下代码绘制了一个十字架:
using (SolidBrush brush = new SolidBrush(Color.FromArgb(192, 99, 104, 113)))
{
using(GraphicsPath path = new GraphicsPath())
{
path.AddRectangle(new Rectangle(e.ClipRectangle.X + (e.ClipRectangle.Width - 40) / 2, e.ClipRectangle.Y, 40, e.ClipRectangle.Height));
path.AddRectangle(new Rectangle(e.ClipRectangle.X, e.ClipRectangle.Y + (e.ClipRectangle.Height - 40) / 2, e.ClipRectangle.Width, 40));
path.FillMode = FillMode.Winding;
e.Graphics.DrawPath(Pens.DimGray, path);
}
}
我想像这样绘制它:
我尝试过使用Flatten();和CloseAllFigures();但这些都行不通.
我正在寻找像Union这样的效果:
这对GraphicsPath有可能吗?
最佳答案 可以使用Regions.But如果没有其他解决方案,您应该使用GDI中的API FrameRgn来绘制区域的框架.
Graphics g = e.Graphics;
using (SolidBrush brush = new SolidBrush(Color.FromArgb(192, 99, 104, 113)))
{
using (GraphicsPath path = new GraphicsPath())
{
path.AddRectangle(new Rectangle(e.ClipRectangle.X + (e.ClipRectangle.Width - 40) / 2, e.ClipRectangle.Y, 40, e.ClipRectangle.Height));
path.AddRectangle(new Rectangle(e.ClipRectangle.X, e.ClipRectangle.Y + (e.ClipRectangle.Height - 40) / 2, e.ClipRectangle.Width, 40));
path.FillMode = FillMode.Winding;
using (Region region = new Region(path))
{
IntPtr reg = region.GetHrgn(g);
IntPtr hdc = g.GetHdc();
IntPtr brushPtr = Win32.GetStockObject(Win32.WHITE_BRUSH);
IntPtr oldbrushPtr = Win32.SelectObject(hdc, brushPtr);
Win32.FrameRgn(hdc, reg, brushPtr, 1, 1);
Win32.DeleteObject(brushPtr);
Win32.SelectObject(hdc, oldbrushPtr);
region.ReleaseHrgn(reg);
g.ReleaseHdc();
}
}
}