我想动态设置按钮的图标。当我使用mahapps图标时,我有这样的东西:
<Button x:Name="btnTest" Style="{StaticResource AppButton}" Content="Website" Tag="{iconPacks:PackIconMaterial Kind=Web}"/>
样式/模板是
<ControlTemplate TargetType="{x:Type Button}" >
<StackPanel Name="ButtonGrid" RenderTransformOrigin="0.5,0.5" DataContext="{Binding RelativeSource={RelativeSource AncestorType=Button}}">
<Rectangle Width="48" Height="48" Fill="{Binding Foreground}">
<Rectangle.OpacityMask>
<VisualBrush Stretch="Fill" Visual="{Binding Tag}" />
</Rectangle.OpacityMask>
</Rectangle>
<TextBlock Text="{Binding Path=Content, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Button}}}"/>
</StackPanel>
</Control.Template>
我通过以下代码 VB.NET 构建图标:
Private Sub ShowAppsTest()
Dim _style As Style = Me.FindResource("AppButton")
Test.Children.Clear()
For Each app As UserApplication In _user.applications
Dim btn As New MyApplicationButton(app.ApplicationName, app.ApplicationPath, app.ApplicationArgs, app.ApplicationIcon)
btn.Content = app.ApplicationName & "_test"
btn.Style = _style
Dim materialIcon As New PackIconSimpleIcons() With {.Kind = PackIconMaterialKind.Cube, .Width = 48, .Height = 48}
btn.Tag = materialIcon
AddHandler btn.Click, AddressOf launchApp
Test.Children.Add(btn)
Next
End Sub
但是以这种方式使用 Tag 是行不通的(@mm8在这篇文章中建议使用工作的静态版本,WPF 在模板中绑定 mahapps metro 图标(。如何将这些动态对象绑定到样式表?我应该使用转换器吗?还是有其他更简单的方法?
谢谢。
如果稍微
修改模板:
<ControlTemplate TargetType="{x:Type Button}" >
<StackPanel Name="ButtonGrid" RenderTransformOrigin="0.5,0.5" DataContext="{Binding RelativeSource={RelativeSource AncestorType=Button}}">
<Rectangle Width="48" Height="48" Fill="{Binding Foreground}">
<Rectangle.OpacityMask>
<VisualBrush Stretch="Fill">
<VisualBrush.Visual>
<iconPacks:PackIconMaterial Kind="{Binding Tag, RelativeSource={RelativeSource AncestorType=Button}}"
Width="24" Height="24" />
</VisualBrush.Visual>
</VisualBrush>
</Rectangle.OpacityMask>
</Rectangle>
<TextBlock Text="{Binding Path=Content, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Button}}}"/>
</StackPanel>
</ControlTemplate>
。可以将 Tag
属性设置为枚举值:
<Button x:Name="btnTest" Style="{StaticResource AppButton}" Content="Website" Tag="{x:Static iconPacks:PackIconMaterialKind.Web}" />
Dim btn As New MyApplicationButton(app.ApplicationName, app.ApplicationPath, app.ApplicationArgs, app.ApplicationIcon)
...
btn.Tag = PackIconMaterialKind.Cube