Setting a Thumb's cursor when IsDragging = True - wpf

Question

I have a control template for a Thumb defined in a Resource Dictionary.
<ControlTemplate TargetType="{x:Type Thumb}">
<Border x:Name="PART_Border"
Cursor="SizeWE"
Padding="{TemplateBinding Padding}"
Background="{TemplateBinding Background}"
SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
</ControlTemplate>
The ControlTemplate is implemented in a style I call GridColumnHeaderGripper and this style is implemented in another Resource Dictionary
<ControlTemplate TargetType="GridViewColumnHeader">
<DockPanel>
<Thumb x:Name="PART_HeaderGripper"
DockPanel.Dock="Right"
Margin="0,0,-8,0"
Cursor="SizeWE"
Style="{StaticResource GridColumnHeaderGripper}" />
etc...
It works great, however, when I begin dragging the Thumb, then the cursor changes from "SizeWE" to "None". I saw another post similar to this on StackOverflow that suggested a Trigger to set the Cursor.
<ControlTemplate.Triggers>
<Trigger Property="IsDragging" Value="True">
<Setter Property="Cursor" Value="SizeWE"/>
</Trigger>
</ControlTemplate.Triggers>
However this solution didn't work for me.
From what I can understand is that we can override the cursor using the Mouse.OverrideCursor static property. Is it possible to set this static property using a Trigger? Is there anything I can do to change the cursor when dragging a thumb?

Answer 1

Add 'Cursor' attribute where you actually declare thumb.
<Window x:Class="ThumbCursor.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"
xmlns:local="clr-namespace:ThumbCursor"
mc:Ignorable="d"
Title="MainWindow" Height="450" Width="800">
<Window.Resources>
<ControlTemplate x:Key="template" TargetType="{x:Type Thumb}">
<Border x:Name="PART_Border"
Cursor="SizeWE"
Padding="{TemplateBinding Padding}"
Background="{TemplateBinding Background}"
SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
</ControlTemplate>
</Window.Resources>
<Grid>
<Thumb x:Name="thmb" Height="50" Width="100" Cursor="SizeWE" Template="{StaticResource template}" DragDelta="thmb_DragDelta"/>
</Grid>
</Window>