Enlarging NavigationView's TogglePaneButton

[metal450]

Forgive what I'm sure is a dumb question - I'm still new to styling in Avalonia.

I can't for the life of me figure out how to enlarge the NavigationView's TogglePaneButton. When I use the inspector, setting the height/width/fontsize yields no change; likewise if I drill all the way down to the TextBlock that shows the icon & try to set the font size there.

I did find that if I enlarge the Border directly inside the TogglePaneButton, the clickable area does increase (but not the icon of course). However, even that I'm having trouble doing with styles:

<Grid.Styles>
  <Style Selector="Button.TogglePaneButton Border">
    <Setter Property="Width" Value="50"/>
    <Setter Property="Height" Value="50"/>
  </Style>
</Grid.Styles>

The default size feels pretty small & hard to tap on mobile screens. I'm sure I'm missing an easy way to do this...any help would be appreciated

[metal450]

....Anyone? 🙏

[timunie]

Here is the original ControlTheme: https://github.com/amwx/FluentAvalonia/blob/master/src/FluentAvalonia/Styling/ControlThemes/FAControls/NavigationView/NavigationViewBackButtonStyles.axaml

You can either override these Resources:

FluentAvalonia/src/FluentAvalonia/Styling/ControlThemes/FAControls/NavigationView/NavigationViewBackButtonStyles.axaml

Lines 16 to 17 in 2264dfe

	<x:Double x:Key="NavigationBackButtonWidth">40</x:Double>
	<x:Double x:Key="NavigationBackButtonHeight">36</x:Double>

or create a new ControlTheme with the given x:Key:

<ControlTheme x:Key="NavigationBackButtonNormalStyle" BasedOn="{StaticResouce NavigationBackButtonNormalStyle}" TargetType="Button">
   <Setter Property="Height" Value="100" />
   [...]

[metal450]

NavigationBackButtonWidth doesn't seem to be it. To clarify, I'm referring to this:

Even if I directly edit FluentAvalonia/Styling/ControlThemes/FAControls/NavigationView/NavigationViewBackButtonStyles.axaml in the sample app & edit NavigationBackButtonWidth, the size of that button doesn't change. Using the inspector, I think it's the TogglePaneButton, per the OP. But no matter what I tweak I can't get the button indicated above to increase in size.