我试图通过模型中的属性在可视笔刷(在App.xaml中定义)中设置Path的“笔画”属性。我正在用户控件的另一个控件模板中使用这种样式。
用户控件资源中的样式:
<Ellipse x:Name="slideThumb" Height="25" Width="25" Stroke="{Binding ThumbColor, UpdateSourceTrigger=PropertyChanged}">
<Ellipse.Style>
<Style TargetType="{x:Type Ellipse}">
<Style.Triggers>
<DataTrigger Binding="{Binding IsHatchBrush}" Value="true">
<Setter Property="Fill" Value="{StaticResource HatchBrushVertical}" />
</DataTrigger>
<DataTrigger Binding="{Binding IsHatchBrush}" Value="false">
<Setter Property="Fill" Value="{Binding ThumbColor, UpdateSourceTrigger=PropertyChanged}" />
</DataTrigger>
</Style.Triggers>
</Style>
</Ellipse.Style>
</Ellipse>
在App.xaml中定义的画笔:
<VisualBrush x:Key="HatchBrushVertical" TileMode="Tile" Viewport="0,0,2,3" ViewportUnits="Absolute" Viewbox="0,0,5,5" ViewboxUnits="Absolute">
<VisualBrush.Transform>
<RotateTransform Angle="45" />
</VisualBrush.Transform>
<VisualBrush.Visual>
<Canvas>
<Path Data="M 0 0 L 0 10" Stroke="{Binding Path=Stroke, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type Ellipse}}}" StrokeThickness="5"/>
</Canvas>
</VisualBrush.Visual>
</VisualBrush>
问题是,我无法通过绑定在app.xaml中设置面刷的Stroke属性。
需要帮助。预先感谢
答案 0 :(得分:0)
您也许可以使用笔刷作为不透明蒙版。
首先,创建一个(简单的)DrawingBrush而不是VisualBrush:
<DrawingBrush x:Key="HatchBrush" TileMode="Tile"
Viewport="0,0,3,3" ViewportUnits="Absolute"
Viewbox="0,0,2,2" ViewboxUnits="Absolute">
<DrawingBrush.Drawing>
<GeometryDrawing Geometry="M-1,2 L2,-1 M0,3 L3,0">
<GeometryDrawing.Pen>
<Pen Thickness="0.7" Brush="Black"/>
</GeometryDrawing.Pen>
</GeometryDrawing>
</DrawingBrush.Drawing>
</DrawingBrush>
然后编写如下所示的DataTrigger:
<DataTrigger Binding="{Binding IsHatchBrush}" Value="True">
<Setter Property="OpacityMask" Value="{StaticResource HatchBrush}" />
</DataTrigger>