From b100acb074ee4064963a98bad944a488ae37f2c9 Mon Sep 17 00:00:00 2001
From: Kevin Bost <kitokeboo@gmail.com>
Date: Thu, 1 Oct 2026 21:58:20 -0700
Subject: [PATCH] fix(Slider): Correct SnapsToDevicePixels and
 UseLayoutRounding propagation

Move `SnapsToDevicePixels` and `UseLayoutRounding` from hardcoded values on the outer `Border` to `TemplateBinding` on the inner `Grid` within Slider control templates. This ensures the slider's own property values for these settings are respected, improving rendering consistency and configurability.

Fixes #3986
---
 .../Themes/MaterialDesignTheme.Slider.xaml    | 19 ++++---------------
 1 file changed, 4 insertions(+), 15 deletions(-)

diff --git a/src/MaterialDesignThemes.Wpf/Themes/MaterialDesignTheme.Slider.xaml b/src/MaterialDesignThemes.Wpf/Themes/MaterialDesignTheme.Slider.xaml
index 6c8d83942c..9a5a8da316 100644
--- a/src/MaterialDesignThemes.Wpf/Themes/MaterialDesignTheme.Slider.xaml
+++ b/src/MaterialDesignThemes.Wpf/Themes/MaterialDesignTheme.Slider.xaml
@@ -590,9 +590,7 @@
   <ControlTemplate x:Key="MaterialDesignSliderHorizontal" TargetType="{x:Type Slider}">
     <Border Background="{TemplateBinding Background}"
             BorderBrush="{TemplateBinding BorderBrush}"
-            BorderThickness="{TemplateBinding BorderThickness}"
-            SnapsToDevicePixels="True"
-            UseLayoutRounding="True">
+            BorderThickness="{TemplateBinding BorderThickness}">
       <Grid SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" UseLayoutRounding="{TemplateBinding UseLayoutRounding}">
         <Grid.RowDefinitions>
           <RowDefinition Height="Auto" />
@@ -684,9 +682,7 @@
   <ControlTemplate x:Key="MaterialDesignSliderVertical" TargetType="{x:Type Slider}">
     <Border Background="{TemplateBinding Background}"
             BorderBrush="{TemplateBinding BorderBrush}"
-            BorderThickness="{TemplateBinding BorderThickness}"
-            SnapsToDevicePixels="True"
-            UseLayoutRounding="True">
+            BorderThickness="{TemplateBinding BorderThickness}">
       <Grid SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" UseLayoutRounding="{TemplateBinding UseLayoutRounding}">
         <Grid.ColumnDefinitions>
           <ColumnDefinition Width="Auto" />
@@ -778,9 +774,7 @@
   <ControlTemplate x:Key="MaterialDesignDiscreteSliderHorizontal" TargetType="{x:Type Slider}">
     <Border Background="{TemplateBinding Background}"
             BorderBrush="{TemplateBinding BorderBrush}"
-            BorderThickness="{TemplateBinding BorderThickness}"
-            SnapsToDevicePixels="True"
-            UseLayoutRounding="True">
+            BorderThickness="{TemplateBinding BorderThickness}">
       <Grid SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" UseLayoutRounding="{TemplateBinding UseLayoutRounding}">
         <Grid.RowDefinitions>
           <RowDefinition Height="Auto" />
@@ -872,9 +866,7 @@
   <ControlTemplate x:Key="MaterialDesignDiscreteSliderVertical" TargetType="{x:Type Slider}">
     <Border Background="{TemplateBinding Background}"
             BorderBrush="{TemplateBinding BorderBrush}"
-            BorderThickness="{TemplateBinding BorderThickness}"
-            SnapsToDevicePixels="True"
-            UseLayoutRounding="True">
+            BorderThickness="{TemplateBinding BorderThickness}">
       <Grid SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" UseLayoutRounding="{TemplateBinding UseLayoutRounding}">
         <Grid.ColumnDefinitions>
           <ColumnDefinition Width="Auto" />
@@ -972,7 +964,6 @@
     <Setter Property="SnapsToDevicePixels" Value="False" />
     <Setter Property="Stylus.IsPressAndHoldEnabled" Value="false" />
     <Setter Property="Template" Value="{StaticResource MaterialDesignSliderHorizontal}" />
-    <Setter Property="UseLayoutRounding" Value="False" />
     <Setter Property="wpf:ElevationAssist.Elevation" Value="Dp1" />
     <Style.Triggers>
       <Trigger Property="Orientation" Value="Vertical">
@@ -994,7 +985,6 @@
     <Setter Property="SnapsToDevicePixels" Value="False" />
     <Setter Property="Stylus.IsPressAndHoldEnabled" Value="false" />
     <Setter Property="Template" Value="{StaticResource MaterialDesignDiscreteSliderHorizontal}" />
-    <Setter Property="UseLayoutRounding" Value="False" />
     <Setter Property="wpf:ElevationAssist.Elevation" Value="Dp1" />
     <Setter Property="wpf:SliderAssist.FocusSliderOnClick" Value="True" />
     <Style.Triggers>
@@ -1017,7 +1007,6 @@
     <Setter Property="SnapsToDevicePixels" Value="False" />
     <Setter Property="Stylus.IsPressAndHoldEnabled" Value="false" />
     <Setter Property="Template" Value="{StaticResource MaterialDesignDiscreteSliderVertical}" />
-    <Setter Property="UseLayoutRounding" Value="False" />
     <Setter Property="wpf:ElevationAssist.Elevation" Value="Dp1" />
     <Setter Property="wpf:SliderAssist.FocusSliderOnClick" Value="True" />
     <Style.Triggers>