FontAutoCompleteBox

An AutoCompleteBox that suggests the font families installed on the system and renders every suggestion in the font it names.

<mosaic:FontAutoCompleteBox
    Watermark="Search fonts..."
    SelectedFontName="{Binding EditorFontName, Mode=TwoWay}" />

Property	Type	Default	Description
SelectedFontFamily	FontFamily?	null	The selected family. Two-way by default.
SelectedFontName	string?	null	The selected family name, e.g. Segoe UI. Two-way by default.
ShowFontPreview	bool	true	Renders each suggested font name in its own font.
PreviewFontSize	double	15	Size of the preview text.

Everything inherited from AutoCompleteBox still applies (Text, Watermark, FilterMode, DropDownMaxHeight, IsDropDownOpen, the DropDownOpened/DropDownClosed routed events, and so on), with these defaults adjusted for a fixed, in-memory list:

• IsTextRequiredForSuggestions is false and MinimumPrefixLength is 0, so opening the drop-down lists the whole catalog.
• MaxSuggestionCount covers every installed font.
• LookupDelay is 75 ms rather than 250 ms, since filtering is a local operation.

Notes:

• The item list comes from FontFamilyCatalog — do not set ItemsSource manually.
• SelectedFontFamily, SelectedFontName, and SelectedItem all stay in sync; setting any one updates the others.
• Filtering is Contains by default; set FilterMode="StartsWith" for prefix matching.
• Typed text that does not resolve to an installed font leaves the selection empty.
• Assigning an ItemTemplate explicitly overrides whatever ShowFontPreview would apply.
• The control reuses the AutoCompleteBox default template rather than registering its own style.

See also: FontComboBox.