Add methods for setting default font

bevy_kayak_ui/src/render/font/font_mapping.rs

@@ -62,6 +62,11 @@ impl FontMapping {
         }
     }
 
+    /// Set a default `KayakFont`
+    pub fn set_default(&mut self, handle: Handle<KayakFont>) {
+        self.add("", handle);
+    }
+
     pub(crate) fn mark_all_as_new(&mut self) {
         self.new_fonts
             .extend(self.font_handles.keys().map(|key| key.clone()));

kayak_core/src/styles/mod.rs

@@ -300,6 +300,8 @@ define_styles! {
         pub top: StyleProp<Units>,
         /// The width of this widget
         pub width: StyleProp<Units>,
+        /// The font style of the widget
+        pub font: StyleProp<String>,
     }
 }
 
@@ -338,6 +340,7 @@ impl Style {
             row_between: StyleProp::Default,
             top: StyleProp::Default,
             width: StyleProp::Default,
+            font: StyleProp::Default,
         }
     }
 }

src/widgets/text.rs

@@ -51,11 +51,11 @@ pub fn Text(props: TextProps) {
         ..
     } = props.clone();
     let font_name = font;
+    let default_style = props.clone().styles.unwrap_or_default().font.resolve();
     let font: Binding<Option<KayakFont>> =
-        context.get_asset(font_name.clone().unwrap_or("Roboto".into()));
-
+        context.get_asset(font_name.clone()
+            .unwrap_or(default_style.clone()));
     context.bind(&font);
-
     let mut should_render = true;
 
     // TODO: It might be worth caching the measurement here until content changes.
@@ -84,13 +84,15 @@ pub fn Text(props: TextProps) {
             ((0.0, 0.0), (0.0, 0.0))
         };
 
+
+
     if should_render {
         let render_command = RenderCommand::Text {
             content: content.clone(),
             size,
             parent_size,
             line_height: line_height.unwrap_or(size * 1.2),
-            font: font_name.clone().unwrap_or("Roboto".into()),
+            font: font_name.clone().unwrap_or(default_style),
         };
 
         let styles = props.styles.clone().unwrap_or_default();