8

好的，我已经绞尽脑汁、Google 和 stackoverflow 试图弄清楚这一点，但就是无法完全理解。我正在尝试使用带有 DrawingGroup 的 DrawingBrush 对我的 WPF 应用程序（最新版本）的背景做两件事。一，我想要一个 RadialGradientBrush 在我的背景中放置一个微妙的渐变。这部分工作得很好。我要完成的第二部分是我还希望将重复的对角线作为该背景的一部分。我知道我可以用图像来做到这一点，但我更愿意使用几何图形，因为我正在努力学习和掌握 WPF。这是我到目前为止所拥有的。径向看起来很好，但线条却没有。任何帮助，将不胜感激。

<Style x:Key="WindowBackground" TargetType="Grid">
        <Setter Property="Background">
            <Setter.Value>
                <DrawingBrush>
                    <DrawingBrush.Drawing>
                        <DrawingGroup>
                            <GeometryDrawing>
                                <GeometryDrawing.Brush>
                                    <RadialGradientBrush GradientOrigin="0.5,0.5" RadiusX="0.5" RadiusY="0.5">
                                        <GradientStop Color="#EE9D40" Offset="0"/>
                                        <GradientStop Color="#BF8230" Offset="1"/>
                                    </RadialGradientBrush>
                                </GeometryDrawing.Brush>
                                <GeometryDrawing.Geometry>
                                    <RectangleGeometry Rect="0,0,1,1"/>
                                </GeometryDrawing.Geometry>
                            </GeometryDrawing>
                            <GeometryDrawing>
                                <GeometryDrawing.Brush>
                                    <DrawingBrush TileMode="Tile" Stretch="None" Viewbox="0,0,1,1" Viewport="0,0,25,25" ViewportUnits="Absolute">
                                        <DrawingBrush.RelativeTransform>
                                            <TranslateTransform X="0" Y="0" />
                                        </DrawingBrush.RelativeTransform>
                                        <DrawingBrush.Drawing>
                                            <GeometryDrawing Brush="#20FFFFFF" Geometry="M10,0 22,0 12,25 0,22 Z" />
                                        </DrawingBrush.Drawing>
                                    </DrawingBrush>
                                </GeometryDrawing.Brush>
                                <GeometryDrawing.Geometry>
                                    <RectangleGeometry Rect="0,0,1,1"/>
                                </GeometryDrawing.Geometry>
                            </GeometryDrawing>
                        </DrawingGroup>
                    </DrawingBrush.Drawing>
                </DrawingBrush>
            </Setter.Value>
        </Setter>
    </Style>
4

3 回答 3

23

这个技巧应该有效。

<LinearGradientBrush EndPoint="0,0" StartPoint="8,8" 
                     MappingMode="Absolute" SpreadMethod="Repeat">
    <GradientStop Color="Black" Offset="0" />
    <GradientStop Color="Black" Offset="0.1" />
    <GradientStop Color="White" Offset="0.1" />
    <GradientStop Color="White" Offset="1" />
</LinearGradientBrush>
于 2013-02-02T19:40:42.663 回答
2

  • 尝试旋转水平线刷以避免角落间隙：

    <VisualBrush TileMode="Tile" 
 Viewport="0,0,5,5" ViewportUnits="Absolute" 
 Viewbox="0,0,5,5"  ViewboxUnits="Absolute">
 <VisualBrush.Visual>
    <Grid Background="White" Height="5">
        <Path Stroke="Black" Data="M 0 3 l 8 0" />
    </Grid>
 </VisualBrush.Visual>
 <VisualBrush.RelativeTransform>
     <RotateTransform CenterX="0.5" CenterY="0.5" Angle="45" />
 </VisualBrush.RelativeTransform>
</VisualBrush>
于 2016-07-22T23:02:52.153 回答
1

I finally got it working, but not with a single composite brush like I was wanting. I used the following styles:

<Style x:Key="WindowBackground" TargetType="Grid">
            <Setter Property="Background">
                <Setter.Value>
                    <RadialGradientBrush GradientOrigin="0.5,0.5" RadiusX="0.5" RadiusY="0.5">
                        <GradientStop Color="#EAA659" Offset="0"/>
                        <GradientStop Color="#BF8230" Offset="1"/>
                    </RadialGradientBrush>
                </Setter.Value>
            </Setter>
        </Style>

        <Style x:Key="HatchOverlay" TargetType="Rectangle">
            <Setter Property="Fill">
                <Setter.Value>
                    <VisualBrush Opacity=".1" TileMode="Tile" Viewport="0,0,10,20" ViewportUnits="Absolute">
                        <VisualBrush.Visual>
                            <Canvas>
                                <Path Stroke="#825821" Data="M 0 0 l 10 20" />
                            </Canvas>
                        </VisualBrush.Visual>
                    </VisualBrush>
                </Setter.Value>
            </Setter>
        </Style>

Then, to enable it at run time, I added a rectangle as the first child of my grid, like so:

<Grid Style="{StaticResource WindowBackground}">
    <Rectangle Style="{StaticResource HatchOverlay}"/>...

This gave me the effect that I was after. Thanks for your help; I'll up-vote each of you.

于 2013-02-02T23:58:18.120 回答