在WPF中创建对角线模式

Question

我想在WPF中创建对角线阴影图案.我正在使用以下XAML代码来生成它:

  <VisualBrush 
  x:Key="HatchBrushnew" 
  TileMode="Tile" Viewport="0,0,30,30" 
  ViewportUnits="Absolute" Viewbox="0,0,30,30"    
  ViewboxUnits="Absolute">
        <VisualBrush.Visual>
            <Canvas>

                <Path  Stroke="Gray" StrokeThickness="0.1cm" >
                    <Path.Data>
                        <LineGeometry StartPoint="0,0" EndPoint="30,30" />
                    </Path.Data>
                </Path>

            </Canvas>
        </VisualBrush.Visual>
    </VisualBrush>

但是用这种图案填充后的形状,我两条线之间的间隙越来越小.谁能建议一种避免这种小差距的方法？

Answer 1

A DrawingBrush会比a简单得多VisualBrush.

除了中央对角线之外,这条线还绘制了两条额外的线(当然可以更短)以覆盖Brush区块的右上角和左下角:

<DrawingBrush x:Key="HatchBrush" TileMode="Tile"
              Viewport="0,0,30,30" ViewportUnits="Absolute"
              Viewbox="0,0,30,30" ViewboxUnits="Absolute">
    <DrawingBrush.Drawing>
        <GeometryDrawing>
            <GeometryDrawing.Pen>
                <Pen Brush="Black" Thickness="5"/>
            </GeometryDrawing.Pen>
            <GeometryDrawing.Geometry>
                <Geometry>M0,0 L30,30 M15,-15 L45,15 M-15,15 L15,45</Geometry>
            </GeometryDrawing.Geometry>
        </GeometryDrawing>
    </DrawingBrush.Drawing>
</DrawingBrush>

如Balázs给出的答案所示,您也可以设置Brush的Transform属性,并使用例如一个垂直LineGeometry:

<DrawingBrush x:Key="HatchBrush" TileMode="Tile"
              Viewport="0,0,30,30" ViewportUnits="Absolute"
              Viewbox="0,0,30,30" ViewboxUnits="Absolute">
    <DrawingBrush.Transform>
        <RotateTransform Angle="45"/>
    </DrawingBrush.Transform>
    <DrawingBrush.Drawing>
        <GeometryDrawing>
            <GeometryDrawing.Pen>
                <Pen Brush="Black" Thickness="5"/>
            </GeometryDrawing.Pen>
            <GeometryDrawing.Geometry>
                <LineGeometry StartPoint="0,15" EndPoint="30,15"/>
            </GeometryDrawing.Geometry>
        </GeometryDrawing>
    </DrawingBrush.Drawing>
</DrawingBrush>