Adding toggle template selector to popup box (#3403)

Author: Keboo

MaterialDesignThemes.Wpf/PopupBox.cs

@@ -144,6 +144,18 @@ public DataTemplate? ToggleContentTemplate
         set => SetValue(ToggleContentTemplateProperty, value);
     }
 
+    public static readonly DependencyProperty ToggleContentTemplateSelectorProperty = DependencyProperty.Register(
+        nameof(ToggleContentTemplateSelector), typeof(DataTemplateSelector), typeof(PopupBox), new PropertyMetadata(default(DataTemplateSelector?)));
+
+    /// <summary>
+    /// Template for <see cref="ToggleContent"/>.
+    /// </summary>
+    public DataTemplateSelector? ToggleContentTemplateSelector
+    {
+        get => (DataTemplateSelector?)GetValue(ToggleContentTemplateSelectorProperty);
+        set => SetValue(ToggleContentTemplateSelectorProperty, value);
+    }
+
     public static readonly DependencyProperty ToggleCheckedContentProperty = DependencyProperty.Register(
         nameof(ToggleCheckedContent), typeof(object), typeof(PopupBox), new PropertyMetadata(default(object?)));
 

MaterialDesignThemes.Wpf/Themes/MaterialDesignTheme.PopupBox.xaml

@@ -120,6 +120,7 @@
                           VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"
                           Content="{TemplateBinding ToggleContent}"
                           ContentTemplate="{TemplateBinding ToggleContentTemplate}"
+                          ContentTemplateSelector="{TemplateBinding ToggleContentTemplateSelector}"
                           Cursor="Hand"
                           IsChecked="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=IsPopupOpen, Mode=TwoWay}"
                           IsTabStop="{TemplateBinding IsTabStop}"
@@ -374,11 +375,13 @@
                 <ContentControl x:Name="StandardToggleContent"
                                 Content="{TemplateBinding ToggleContent}"
                                 ContentTemplate="{TemplateBinding ToggleContentTemplate}"
+                                ContentTemplateSelector="{TemplateBinding ToggleContentTemplateSelector}"
                                 Focusable="False"
                                 Visibility="{TemplateBinding ToggleCheckedContent, Converter={StaticResource InvertedNullVisibilityConverter}}" />
                 <ContentControl x:Name="ExplicitToggleContent"
                                 Content="{TemplateBinding ToggleContent}"
                                 ContentTemplate="{TemplateBinding ToggleContentTemplate}"
+                                ContentTemplateSelector="{TemplateBinding ToggleContentTemplateSelector}"
                                 Focusable="False"
                                 Visibility="{TemplateBinding ToggleCheckedContent, Converter={StaticResource NullVisibilityConverter}}" />
                 <ContentControl x:Name="ExplicitToggleCheckedContent"