Wpf 将DrawingContext转换为几何图形?
有人知道是否有可能将Wpf 将DrawingContext转换为几何图形?,wpf,drawingcontext,Wpf,Drawingcontext,有人知道是否有可能将绘图上下文保存或转换为几何体 例如,在 using (DrawingContext dc = RenderOpen()) { dc.DrawLine(penSelected, Data.MidTop, Data.MidTop + vertical); dc.DrawLine(pen, Data.MidTop - horizontal, Data.MidTop + thickness); dc.DrawLine(pen, Data.MidTop + ve
绘图上下文
保存或转换为几何体
例如,在
using (DrawingContext dc = RenderOpen())
{
dc.DrawLine(penSelected, Data.MidTop, Data.MidTop + vertical);
dc.DrawLine(pen, Data.MidTop - horizontal, Data.MidTop + thickness);
dc.DrawLine(pen, Data.MidTop + vertical - thickness, Data.MidTop + horizontal + vertical);
dc.DrawText(new FormattedText(Data.Time2.ToString("0.0"), cultureinfo, FlowDirection.LeftToRight, typeface, 8, Brushes.Black),
Data.MidTop + 3 * thickness);
dc.DrawText(new FormattedText(Data.Time2.ToString("0.0"), cultureinfo, FlowDirection.LeftToRight, typeface, 8, Brushes.Black),
Data.MidTop + vertical - horizontal - 3 * thickness);
}
要以某种方式将绘制的对象保存在几何图形中?当您使用视觉内容填充DrawingVisual时,您实际上是在创建图形对象的层次集合,这些对象可由DrawingVisual的
Drawing
属性(DrawingGroup类型)访问。这些图形对象实际上属于以下类型之一:
- 几何制图
- 图形绘制
- 图像绘制
- 录像画
- 绘图组
Geometry
属性,而GlyphRunDrawing有一个GlyphRun
属性,该属性返回一个GlyphRun对象,而GlyphRun对象又有一个BuildGeometry
方法。此方法返回GlyphRun文本轮廓的几何图形
从DrawingGroup创建几何图形的静态辅助对象方法可能如下所示:
public static Geometry CreateGeometry(DrawingGroup drawingGroup)
{
var geometry = new GeometryGroup();
foreach (var drawing in drawingGroup.Children)
{
if (drawing is GeometryDrawing)
{
geometry.Children.Add(((GeometryDrawing)drawing).Geometry);
}
else if (drawing is GlyphRunDrawing)
{
geometry.Children.Add(((GlyphRunDrawing)drawing).GlyphRun.BuildGeometry());
}
else if (drawing is DrawingGroup)
{
geometry.Children.Add(CreateGeometry((DrawingGroup)drawing));
}
}
geometry.Transform = drawingGroup.Transform;
return geometry;
}
您只需将DrawingVisual的Drawing
属性的值传递给此方法:
var geometry = CreateGeometry(visual.Drawing);
问题是如何从DrawingVisual中的所有绘制内容中获取一个几何体?太好了,+1!请注意,如果不是null,还应在几何图形上应用图形的变换。此外,为了涵盖另外两种情况(图像和视频),您可以使用Rect属性-其正确性取决于几何体的用途。