Devolutions.AvaloniaControls 2025.8.27

Custom Avalonia Controls developed by Devolutions

Custom Controls [Work in Progress]

In this package we publish various custom controls as well as converters, markup extensions and other helper utilities used in our themes and Devolutions Remote Desktop Manager. The more generically useful ones are listed here (full documentation tba ...).

• Installation
• Controls
• Converters
• MarkupExtensions

Installation

Install the Devolutions.AvaloniaControls package via NuGet:

Install-Package Devolutions.AvaloniaControls

or .NET

dotnet add package Devolutions.AvaloniaControls

Controls

• EditableComboBox
• SearchHighlightTextBlock
• TabPane (Extends TabControl for different styling only)

Converters

Usage: Converter={x:Static DevoConverters.<ConverterName>}

• ColorToCssFillConverter <br />ConverterParameter: class(es) of the path(s) to apply colour to <br /> Converts a Brush and CSS class(es) into a CSS string for SVG path styling.
• CornerRadiusExtractor <br />ConverterParameter: predefined CornerRadiusSubset (enum) <br /> Returns a new CornerRadius, to selectively apply a given CornerRadius to a subset of the four corners (0 to the others)
• HasClass / HasNotClass <br />ConverterParameter: class name to check for <br /> Returns a boolean depending on whether the given element has the given class
• ThicknessExtractor <br />ConverterParameter: predefined ThicknessSubset (enum) <br /> Returns a new Thickness, to selectively apply a given Thickness to a subset of the four sides (0 to the others)

MultiConverters

Usage: <MultiBinding Converter="{x:Static DevoMultiConverters.<ConverterName>}">

• BooleanToChoiceConverter <br /> Takes a boolean and two value choices. I checks for the presence of the class given as ConverterParameter and returns the first choice value if found, or the second one otherwise. <br /> ➡️ Use the BindingToggler MarkupExtension instead for a more streamlined syntax.
• ClassToChoiceConverter <br /> Takes a control's classes and two value choices. I checks for the presence of the class given as ConverterParameter and returns the first choice value if found, or the second one otherwise.
• FirstNonEmptyStringMultiConverter <br /> Returns the first non-empty string in the multi-value binding, ignores the rest
• FirstNonNullValueMultiConverter <br /> Returns the first non-null value in the multi-value binding, ignores the rest
• IsExplicitlyTrueConverter <br /> Takes a single input and returns a boolean based on whether the input is a boolean and true (useful to convert a possible AvaloniaProperty.UnsetValue to 'False' for use in other boolean operations)
• IsUnsetConverter <br /> Takes a single input and returns True if it is AvaloniaProperty.UnsetValue.

MarkupExtensions

• AddBinding
• MultiplyBinding
• AndBinding
• OrBinding
• BindingToggler
• DynamicResourceToggler
• WindowActiveBindingToggler
• WindowActiveResourceToggler
• WindowIsActiveBinding
• ChangeColorOpacity