目的是为我的自定义按钮模板构建图标路径几何的资源字典。
到目前为止有效:
的ResourceDictionary:
<Geometry x:Key="ArrowDown">
M0,10 M10,0 M5,1 L5,7 4.2,7 5,8 5.8,7 5,7
</Geometry>
<Geometry x:Key="ArrowUp">
M0,0 M10,10 M5,9 L5,3 4.2,3 5,2 5.8,3 5,3
</Geometry>
路径的附加属性:
public static Geometry GetIconPath(UIElement element)
{
return (Geometry)element.GetValue(IconPathProperty);
}
public static void SetIconPath(UIElement element, Geometry value)
{
element.SetValue(PIconPathProperty, value);
}
public static readonly DependencyProperty IconPathProperty =
DependencyProperty.RegisterAttached("IconPath", typeof(Geometry), typeof(Attached));
模板:
<ControlTemplate x:Key="ButtonTemplate" TargetType="{x:Type Button}">
<Viewbox>
<Path Name="Icon" Stroke="Black" StrokeThickness="1" Stretch="Uniform"
Data="{Binding (local:Attached.IconPath), RelativeSource={RelativeSource TemplatedParent}}"/>
</Viewbox>
<ControlTemplate.Triggers>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Stroke" TargetName="Icon" Value="Gray"/>
<Setter TargetName="Icon" Property="Effect">
<Setter.Value>
<DropShadowEffect ShadowDepth="0.2" Color="Black" Direction="125"/>
</Setter.Value>
</Setter>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
按钮:
<Button local:Attached.IconPath="{StaticResource ArrowDown}"/>
这很好用,但我现在增加了一层复杂性:一些图标需要填充而其他图标不需要填充。我想在ResourceDictionary中使用GeometryData获取此信息。
一种解决方案是将整个Path存储在ResourceDictionary中,但正如您在ControlTemplate中看到的,我需要能够访问Path以触发DropShadowEffect。
所以我尝试的替代解决方案是使用POCO将这两个元素存储在:
public class IconData
{
public bool Fill { get; set; }
public Geometry Geometry { get; set; }
}
所以ResourceDictionary现在包含:
<local:IconData x:Key="ArrowUp" Fill="True" Geometry="
M0,0 M10,10 M5,9 L5,3 4.2,3 5,2 5.8,3 5,3"/>
使用适当的附加属性,ControlTemplate变为:
<ControlTemplate x:Key="ButtonTemplate" TargetType="{x:Type Button}">
<Viewbox>
<Path Name="Icon" Stroke="Black" StrokeThickness="1" Stretch="Uniform"
Data="{Binding (local:Attached.IconData.Geometry), RelativeSource={RelativeSource TemplatedParent}}"/>
</Viewbox>
<ControlTemplate.Triggers>
<Trigger Property="local:Attached.IconData.Fill" Value="True">
<Setter Property="Fill" TargetName="Icon" Value="#00000000"/>
</Trigger>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Stroke" TargetName="Icon" Value="Gray"/>
<Setter TargetName="Icon" Property="Effect">
<Setter.Value>
<DropShadowEffect ShadowDepth="0.2" Color="Black" Direction="125"/>
</Setter.Value>
</Setter>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
不幸的是,这里对IconData的引用都说Nested types are not supported: Attached.IconData
。
我愿意接受我的实施或任何解决方法或不同解决方案的解决方案。
答案 0 :(得分:4)
<Path Name="Icon" Stroke="Black" StrokeThickness="1" Stretch="Uniform"
Data="{Binding (local:Attached.IconData.Geometry), RelativeSource={RelativeSource TemplatedParent}}"/>
此处(local:Attached.IconData.Geometry)
表示嵌套类型。要获取Attached.IconData
对象的属性,应使用以下绑定路径:
<Path Name="Icon" Stroke="Black" StrokeThickness="1" Stretch="Uniform"
Data="{Binding (local:Attached.IconData).Geometry, RelativeSource={RelativeSource TemplatedParent}}"/>
另请务必在Geometry
类型中将附加的媒体资源类型从IconData
更改为Attached
。
IconData
类不应该嵌套到任何类型,因为它正是所谓的不支持(只是放在与其他使用类型相同的命名空间中)。
经过这些修改后,您的代码开始为我工作。
这是主窗口XAML:
<Window x:Class="WpfApplication1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:WpfApplication1"
Title="MainWindow" Height="250" Width="260">
<Window.Resources>
<ResourceDictionary>
<local:IconData x:Key="ArrowUp" Fill="False" Geometry="M0,0 M10,10 M4.8,9 4.8,3 4.2,3 5,2 5.8,3 5.2,3 5.2,9 Z"/>
<ControlTemplate x:Key="ButtonTemplate" TargetType="{x:Type Button}">
<Viewbox>
<Path Name="Icon" Stretch="Uniform"
Data="{Binding (local:Attached.IconPath).Geometry, RelativeSource={RelativeSource TemplatedParent}}">
<Path.Style>
<Style TargetType="Path">
<Style.Triggers>
<DataTrigger Binding="{Binding (local:Attached.IconPath).Fill, RelativeSource={RelativeSource TemplatedParent}}"
Value="True">
<Setter Property="Fill" Value="Black" />
</DataTrigger>
<DataTrigger Binding="{Binding (local:Attached.IconPath).Fill, RelativeSource={RelativeSource TemplatedParent}}"
Value="False">
<Setter Property="Stroke" Value="Black" />
<Setter Property="StrokeThickness" Value="0.2" />
</DataTrigger>
</Style.Triggers>
</Style>
</Path.Style>
</Path>
</Viewbox>
</ControlTemplate>
</ResourceDictionary>
</Window.Resources>
<Button local:Attached.IconPath="{StaticResource ArrowUp}" Template="{StaticResource ButtonTemplate}" />
</Window>
请注意,我修改了M0,0 M10,10 M4.8,9 4.8,3 4.2,3 5,2 5.8,3 5.2,3 5.2,9 Z
上的路径几何图形以使其关闭,因此适合填充。
以下是案例<local:IconData Fill="False" ... />
和<local:IconData Fill="True" ... />
的屏幕截图: