我有一个DrawingImage可用作矢量图像占位符。
进一步,有些样式会采用相应的DrawingImage并将其用作我的UserControl自定义按钮中的图像。
到目前为止,一切都还不错,但是我才意识到我当前的方法已经导致我的DrawingImages不可重用,因为它们的Brush属性硬绑定到了控件上,它们的用法如下:
<DrawingImage x:Key="addIcon">
<DrawingImage.Drawing>
<DrawingGroup>
<GeometryDrawing Brush="{Binding Path=ImageBrush, ElementName=addButton}" Geometry="M438.2,0H51.6C23.1,0,0,23.2,0,51.6v386.6c0,28.5,23.2,51.6,51.6,51.6h386.6c28.5,0,51.6-23.2,51.6-51.6V51.6
C489.8,23.2,466.6,0,438.2,0z M465.3,438.2c0,14.9-12.2,27.1-27.1,27.1H51.6c-14.9,0-27.1-12.2-27.1-27.1V51.6
c0-14.9,12.2-27.1,27.1-27.1h386.6c14.9,0,27.1,12.2,27.1,27.1V438.2z" />
<GeometryDrawing Brush="{Binding Path=ImageBrush, ElementName=addButton}" Geometry="M337.4,232.7h-80.3v-80.3c0-6.8-5.5-12.3-12.3-12.3s-12.3,5.5-12.3,12.3v80.3h-80.3c-6.8,0-12.3,5.5-12.3,12.2
c0,6.8,5.5,12.3,12.3,12.3h80.3v80.3c0,6.8,5.5,12.3,12.3,12.3s12.3-5.5,12.3-12.3v-80.3h80.3c6.8,0,12.3-5.5,12.3-12.3
C349.7,238.1,344.2,232.7,337.4,232.7z" />
</DrawingGroup>
</DrawingImage.Drawing>
</DrawingImage>
现在,我试图找到一种方法,使它们不直接绑定到Element,而是绑定到某种通用Element(当接口工作时类似),以便代码可以确保绑定到它的任何内容,具有画笔依赖项属性。
到目前为止,我找不到它。
我也尝试过搜索祖先,但还是没有运气。
是否有或多或少的惯例是绑定到具有某些依赖项属性的未知元素,而不直接暴露它们呢?
最佳答案
实际上,无法直接执行您的要求。原因是,当您将DrawingImage
定义为资源,然后将其用作图像源时,则不会创建该资源的副本,但是每个图像都将查找同一资源。因此,DrawingImage
在视觉树中根本没有父级,因此没有绑定到的控件。
这里有两个选择。一种是使用Geometry
作为资源,而不是DrawingImage
。然后,您可以引用此DrawingImage
并使用不同的颜色来创建一些Geometry
资源。或者根本不使用DrawingImage
,而是直接使用Geometry(例如,通过Path
)。实际上,有很多方法可以使用和组合几何资源。我在这里仅举几个例子:
<Window x:Class="FlipControlApp.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
Title="MainWindow" Height="300" Width="300">
<Window.Resources>
<PathGeometry x:Key="addIconGeometry" Figures="M337.4,232.7h-80.3v-80.3c0-6.8-5.5-12.3-12.3-12.3s-12.3,5.5-12.3,12.3v80.3h-80.3c-6.8,0-12.3,5.5-12.3,12.2
c0,6.8,5.5,12.3,12.3,12.3h80.3v80.3c0,6.8,5.5,12.3,12.3,12.3s12.3-5.5,12.3-12.3v-80.3h80.3c6.8,0,12.3-5.5,12.3-12.3
C349.7,238.1,344.2,232.7,337.4,232.7z"/>
<PathGeometry x:Key="iconBorderGeometry" Figures="M438.2,0H51.6C23.1,0,0,23.2,0,51.6v386.6c0,28.5,23.2,51.6,51.6,51.6h386.6c28.5,0,51.6-23.2,51.6-51.6V51.6
C489.8,23.2,466.6,0,438.2,0z M465.3,438.2c0,14.9-12.2,27.1-27.1,27.1H51.6c-14.9,0-27.1-12.2-27.1-27.1V51.6
c0-14.9,12.2-27.1,27.1-27.1h386.6c14.9,0,27.1,12.2,27.1,27.1V438.2z"/>
<GeometryGroup x:Key="addIconWithBorderGeometry">
<StaticResource ResourceKey="iconBorderGeometry"/>
<StaticResource ResourceKey="addIconGeometry"/>
</GeometryGroup>
<DrawingImage x:Key="addIconBlack">
<DrawingImage.Drawing>
<DrawingGroup>
<GeometryDrawing Brush="Black" Geometry="{StaticResource addIconWithBorderGeometry}" />
</DrawingGroup>
</DrawingImage.Drawing>
</DrawingImage>
</Window.Resources>
<UniformGrid Columns="2">
<Button Name="addButton0" Width="100" Height="100">
<Image Source="{StaticResource addIconBlack}"/>
</Button>
<Button Width="100" Height="100" Foreground="Blue">
<Image>
<Image.Source>
<DrawingImage>
<DrawingImage.Drawing>
<DrawingGroup>
<GeometryDrawing Brush="{Binding Foreground, RelativeSource={RelativeSource AncestorType=Control}}"
Geometry="{StaticResource addIconGeometry}" />
</DrawingGroup>
</DrawingImage.Drawing>
</DrawingImage>
</Image.Source>
</Image>
</Button>
<Button Width="100" Height="100" Foreground="Green">
<Grid>
<Path Data="{StaticResource iconBorderGeometry}" Fill="Pink" Stretch="Uniform"/>
<Path Data="{StaticResource addIconGeometry}" Fill="Purple" Stretch="Uniform" Margin="15"/>
</Grid>
</Button>
<Button x:Name="addBtn" Width="100" Height="100" Foreground="Green">
<Path Fill="{Binding Foreground, ElementName=addBtn}" Stretch="Uniform">
<Path.Data>
<CombinedGeometry Geometry1="{StaticResource iconBorderGeometry}" Geometry2="{StaticResource addIconGeometry}"/>
</Path.Data>
</Path>
</Button>
</UniformGrid>
</Window>
另一种选择是将整个
Image
用作资源,并且将Brush
绑定到一些祖先属性。但是在这种情况下,必须使用属性x:Shared
,因此必须在已编译的资源字典中声明资源(有关详细信息,请参见x:Shared)。创建资源:
<ResourceDictionary>
<Image x:Key="addIconImage2" x:Shared="False">
<Image.Source>
<DrawingImage>
<DrawingImage.Drawing>
<DrawingGroup>
<GeometryDrawing Brush="{Binding Foreground, RelativeSource={RelativeSource AncestorType=Control}}"
Geometry="M438.2,0H51.6C23.1,0,0,23.2,0,51.6v386.6c0,28.5,23.2,51.6,51.6,51.6h386.6c28.5,0,51.6-23.2,51.6-51.6V51.6
C489.8,23.2,466.6,0,438.2,0z M465.3,438.2c0,14.9-12.2,27.1-27.1,27.1H51.6c-14.9,0-27.1-12.2-27.1-27.1V51.6
c0-14.9,12.2-27.1,27.1-27.1h386.6c14.9,0,27.1,12.2,27.1,27.1V438.2z" />
<GeometryDrawing Brush="{Binding Foreground, RelativeSource={RelativeSource AncestorType=Control}}"
Geometry="M337.4,232.7h-80.3v-80.3c0-6.8-5.5-12.3-12.3-12.3s-12.3,5.5-12.3,12.3v80.3h-80.3c-6.8,0-12.3,5.5-12.3,12.2
c0,6.8,5.5,12.3,12.3,12.3h80.3v80.3c0,6.8,5.5,12.3,12.3,12.3s12.3-5.5,12.3-12.3v-80.3h80.3c6.8,0,12.3-5.5,12.3-12.3
C349.7,238.1,344.2,232.7,337.4,232.7z" />
</DrawingGroup>
</DrawingImage.Drawing>
</DrawingImage>
</Image.Source>
</Image>
</ResourceDictionary>
然后使用它:
<Button Name="addButton3" Width="100" Height="100"
Content="{StaticResource addIconImage}" Foreground="Red"/>
<Button Name="addButton4" Width="100" Height="100"
Content="{StaticResource addIconImage}" Foreground="Green"/>
每次引用它时,都会创建一个新副本。
但是第一种方法更灵活。
关于c# - 绑定(bind)到通用UI元素/XAML接口(interface),我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/43227901/