README.md

Custom Avalonia Themes developed by Devolutions

DevExpress Theme [Work in Progress]

This theme is currently based on Avalonia.Themes.Fluent, both as a fallback for any controls not covered yet and as starting point for our (somewhat simplified) style definitions targeting DevExpress Winforms look.

While we are prioritizing controls for Devolutions Remote Desktop Manager, we welcome contributions from the Avalonia community to add more DevExpress-style controls.

• Installation
• Styled Controls
  • ✅ Available in the current build
    • AutoCompleteBox
    • Button
    • ButtonSpinner
    • Calendar
      • CalendarButton
      • CalendarDatePicker
      • CalendarDayButton
      • CalendarItem
    • CheckBox
    • ColorPicker
    • ComboBox
      • ComboBoxItem
    • DataGrid
    • EditableComboBox (Custom control)
    • Expander
    • ListBox
      • ListBoxItem
    • NumericUpDown
      • ButtonSpinner
    • RadioButton
    • ScrollViewer
      • ScrollBar
    • Separator
    • TabControl
      • TabItem
    • TabPane
    • TagInput (Custom control (Ursa))
    • TextBox
    • TreeView
      • TreeViewItem
    • Window
  • 🚧 In progress ...
    • small improvements & fixes, some code cleanup
    • ContextMenu
    • SplitButton
  • 🔮 Next on the road map ...
    • vertical tabs

Installation

Avalonia 12 required. Packages 2026.6.17-avalonia12 and later require Avalonia 12. The last stable release compatible with Avalonia 11 is 2026.6.16.

Install the Devolutions.AvaloniaTheme.DevExpress package via NuGet:

Install-Package Devolutions.AvaloniaTheme.DevExpress

or .NET

dotnet add package Devolutions.AvaloniaTheme.DevExpress

In your App.axaml, replace the existing theme (e.g. <FluentTheme /> or <SimpleTheme />) with the DevExpress theme:

<Application ...>
  <Application.Styles>
     <DevolutionsDevExpressTheme />
  </Application.Styles>
</Application>

Note: Some global Styles will also be loaded by default, you can opt out by setting GlobalStyles to false (<DevolutionsDevExpressTheme GlobalStyles="False" />). GlobalStyles are also available as a separate tag <DevolutionsDevExpressThemeGlobalStyles /> to cover scenarios where consumers would like to scope them to some control instead of including them globally. This is may be necessary to prevent styles from "bleeding out" in cases where that might be undesirable.

Styled Controls

Most of the images below are screenshots from the SampleApp test and demo pages - feel free to check out the code there for more detailed usage examples.

For an always up-to-date visual reference you can also browse the baseline screenshots.

	AdornerLayer
✅	AutoCompleteBox
	➡️ See also EditableComboBox in our custom controls
✅	Button
✅	CalendarDatePicker Calendar CalendarItem CalendarButton CalendarDayButton
	Note: MinWidth is set to comfortably accommodate short date formats & the corresponding default watermark when HorizontalAlignment is set to anything other than the default (Stretch). If you set SelectedDateFormat="Long" you will have to override MinWidth to the longest expected string length, depending on supported languages. Otherwise the control's width will jump when the date is changed.
	CaptionButtons
	Carousel
✅	CheckBox
✅	ColorPicker
✅	ComboBox ComboBoxItem
🚧	ContextMenu
✅	DataGrid
	DataValidationErrors
	DatePicker
	DateTimePickerShared
	DropDownButton
✅	EditableComboBox (Custom control)
	EmbeddableControlRoot
✅	Expander
	FluentControls
	FlyoutPresenter
	GridSplitter
	HeaderedContentControl
	HyperlinkButton
	ItemsControl
	Label
✅	ListBox ListBoxItem
	ManagedFileChooser
	Menu
	MenuFlyoutPresenter
	MenuItem
	MenuScrollViewer
	NotificationCard
✅	NumericUpDown ButtonSpinner
	OverlayPopupHost
	PathIcon
	PopupRoot
	ProgressBar
✅	RadioButton
	RefreshContainer
	RefreshVisualizer
	RepeatButton
✅	ScrollViewer ScrollBar
	SelectableTextBlock
✅	Separator
	Slider
	SplitButton
	SplitView
✅	TabControl TabItem
✅	TabPane (Custom control)
	TabStrip
	TabStripItem
✅	TagInput (Custom control (Ursa))
	Input control for managing tags (keywords, labels, recipients). Supports adding/removing tags, separators, max count, duplicate prevention.
✅	TextBox
	TextSelectionHandle
	ThemeVariantScope
	TimePicker
	TitleBar
	ToggleButton
	ToggleSwitch
	ToolTip
	TransitioningContentControl
✅	TreeView TreeViewItem
✅	Window
	Controls inherit basic DevEx-specific Fore-/Background & Font styling (or EmbeddableControlRoot)
	WindowNotificationManager