FontStyleComboBox

July 30, 2026 · View on GitHub

A ComboBox that lists the font styles — Normal, Italic and Oblique — each entry rendered in the style it names. The selection is exposed both as a FontStyle and as a string name, so a view model can bind whichever it stores.

<mosaic:FontStyleComboBox SelectedFontStyle="{Binding HeadingStyle, Mode=TwoWay}" />

Previews are on by default; turn them off for plain text:

<mosaic:FontStyleComboBox
    PreviewFontSize="16"
    ShowStylePreview="False"
    SelectedFontStyleName="{Binding HeadingStyleName, Mode=TwoWay}" />

Property	Type	Default	Description
`SelectedFontStyle`	`FontStyle`	`FontStyles.Normal`	The selected style. Two-way by default.
`SelectedFontStyleName`	`string?`	`null`	The selected style name, e.g. `Italic`. Two-way by default.
`ShowStylePreview`	`bool`	`true`	Renders each style name in its own style.
`PreviewFontSize`	`double`	`14`	Size of the preview text.

Notes:

The item list comes from FontStyleCatalog — do not set ItemsSource manually.
SelectedFontStyle, SelectedFontStyleName, and SelectedItem all stay in sync; setting any one updates the others.
Assigning an ItemTemplate explicitly overrides whatever ShowStylePreview would apply.
The control reuses the standard (or opt-in native Mosaic) ComboBox styling — no custom template.
The PropertyGrid uses this control automatically for any FontStyle property.
A font family without a true italic face is synthesized (faux italic) by WPF, so Italic and Oblique can look identical for some fonts.