Small improvements

- Caching font family resolution to avoid scanning the database over and
  over. The db should still be cached, but this makes repeated setting
  free.
- into_switcher rename for Dynamic<WidgetInstance> to avoid conflicting
  with Switchable::switcher()
- Dynamic debugging is less verbose
- IntoDynamic<Validation> for Result<T,E>
- Input no longer blinks cursor when disabled.

examples/tic-tac-toe.rs

@@ -17,7 +17,7 @@ fn main() -> gooey::Result {
             AppState::Winner(winner) => game_end(*winner, &app).make_widget(),
         }
     }))
-    .switcher()
+    .into_switcher()
     .contain()
     .width(Lp::inches(2)..Lp::inches(6))
     .height(Lp::inches(2)..Lp::inches(6))

src/context.rs

@@ -623,15 +623,6 @@ impl<'context, 'window, 'clip, 'gfx, 'pass> GraphicsContext<'context, 'window, '
         self.gfx.set_font_weight(self.widget.get(&FontWeight));
     }
 
-    // /// Applies the current style settings for font family, text size, font
-    // /// style, and font weight.
-    // pub fn apply_current_font_settings_to<'a>(&self, attrs: Attrs<'a>) -> Attrs<'a> {
-    //     attrs.set_available_font_family(&self.widget.get(&FontFamily));
-    //     attrs.set_font_size(self.widget.get(&TextSize));
-    //     attrs.set_font_style(self.widget.get(&FontStyle));
-    //     attrs.set_font_weight(self.widget.get(&FontWeight));
-    // }
-
     /// Invokes [`Widget::redraw()`](crate::widget::Widget::redraw) on this
     /// context's widget.
     ///
@@ -1270,6 +1261,14 @@ pub trait ManageWidget {
     fn manage(&self, context: &WidgetContext<'_, '_>) -> Self::Managed;
 }
 
+impl ManageWidget for WidgetId {
+    type Managed = Option<ManagedWidget>;
+
+    fn manage(&self, context: &WidgetContext<'_, '_>) -> Self::Managed {
+        context.current_node.tree.widget(*self)
+    }
+}
+
 impl ManageWidget for WidgetInstance {
     type Managed = Option<ManagedWidget>;
 

src/graphics.rs

@@ -19,6 +19,7 @@ use crate::styles::FontFamilyList;
 pub struct Graphics<'clip, 'gfx, 'pass> {
     renderer: RenderContext<'clip, 'gfx, 'pass>,
     region: Rect<Px>,
+    current_font_family: &'clip mut Option<FontFamilyList>,
 }
 
 enum RenderContext<'clip, 'gfx, 'pass> {
@@ -29,10 +30,14 @@ enum RenderContext<'clip, 'gfx, 'pass> {
 impl<'clip, 'gfx, 'pass> Graphics<'clip, 'gfx, 'pass> {
     /// Returns a new graphics context for the given [`Renderer`].
     #[must_use]
-    pub fn new(renderer: Renderer<'gfx, 'pass>) -> Self {
+    pub fn new(
+        renderer: Renderer<'gfx, 'pass>,
+        current_font_family: &'clip mut Option<FontFamilyList>,
+    ) -> Self {
         Self {
             region: renderer.clip_rect().into_signed(),
             renderer: RenderContext::Renderer(renderer),
+            current_font_family,
         }
     }
 
@@ -86,8 +91,11 @@ impl<'clip, 'gfx, 'pass> Graphics<'clip, 'gfx, 'pass> {
 
     /// Sets the font family to the first family in `list`.
     pub fn set_available_font_family(&mut self, list: &FontFamilyList) {
-        if let Some(family) = self.find_available_font_family(list) {
-            self.set_font_family(family);
+        if self.current_font_family.as_ref() != Some(list) {
+            *self.current_font_family = Some(list.clone());
+            if let Some(family) = self.find_available_font_family(list) {
+                self.set_font_family(family);
+            }
         }
     }
 
@@ -123,6 +131,7 @@ impl<'clip, 'gfx, 'pass> Graphics<'clip, 'gfx, 'pass> {
         Graphics {
             renderer: RenderContext::Clipped(self.renderer.clipped_to(new_clip)),
             region,
+            current_font_family: &mut *self.current_font_family,
         }
     }
 

src/value.rs

@@ -1,7 +1,7 @@
 //! Types for storing and interacting with values in Widgets.
 
 use std::collections::HashMap;
-use std::fmt::{Debug, Display};
+use std::fmt::{self, Debug, Display};
 use std::future::Future;
 use std::hash::{BuildHasher, Hash};
 use std::ops::{Deref, DerefMut, Not};
@@ -25,7 +25,6 @@ use crate::widgets::{Radio, Select, Space, Switcher};
 
 /// An instance of a value that provides APIs to observe and react to its
 /// contents.
-#[derive(Debug)]
 pub struct Dynamic<T>(Arc<DynamicData<T>>);
 
 impl<T> Dynamic<T> {
@@ -598,18 +597,34 @@ impl<T> Dynamic<T> {
     }
 }
 
+impl<T> Debug for Dynamic<T>
+where
+    T: Debug,
+{
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self.0.state() {
+            Ok(state) => f
+                .debug_struct("Dynamic")
+                .field("value", &state.wrapped.value)
+                .field("generation", &state.wrapped.generation)
+                .finish(),
+            Err(_) => f.debug_tuple("Dynamic").field(&"<unable to lock>").finish(),
+        }
+    }
+}
+
 impl Dynamic<WidgetInstance> {
     /// Returns a new [`Switcher`] widget whose contents is the value of this
     /// dynamic.
     #[must_use]
-    pub fn switcher(self) -> Switcher {
+    pub fn into_switcher(self) -> Switcher {
         Switcher::new(self)
     }
 }
 
 impl MakeWidgetWithId for Dynamic<WidgetInstance> {
     fn make_with_id(self, id: crate::widget::WidgetTag) -> WidgetInstance {
-        self.switcher().make_with_id(id)
+        self.into_switcher().make_with_id(id)
     }
 }
 
@@ -634,6 +649,8 @@ impl<T> context::sealed::Trackable for Dynamic<T> {
     }
 }
 
+impl<T> Eq for Dynamic<T> {}
+
 impl<T> PartialEq for Dynamic<T> {
     fn eq(&self, other: &Self) -> bool {
         Arc::ptr_eq(&self.0, &other.0)
@@ -833,7 +850,7 @@ struct DeadlockError;
 impl std::error::Error for DeadlockError {}
 
 impl Display for DeadlockError {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         f.write_str("a deadlock was detected")
     }
 }
@@ -869,7 +886,7 @@ impl<T> Debug for State<T>
 where
     T: Debug,
 {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         f.debug_struct("State")
             .field("wrapped", &self.wrapped)
             .field("readers", &self.readers)
@@ -988,6 +1005,17 @@ pub struct DynamicGuard<'a, T> {
     accessed_mut: bool,
 }
 
+impl<T> DynamicGuard<'_, T> {
+    /// Returns the generation of the value at the time of locking the dynamic.
+    ///
+    /// Even if this guard accesses the data through [`DerefMut`], this value
+    /// will remain unchanged while the guard is held.
+    #[must_use]
+    pub fn generation(&self) -> Generation {
+        self.guard.wrapped.generation
+    }
+}
+
 impl<'a, T> Deref for DynamicGuard<'a, T> {
     type Target = T;
 
@@ -1896,6 +1924,19 @@ impl Validation {
     }
 }
 
+impl<T, E> IntoDynamic<Validation> for Dynamic<Result<T, E>>
+where
+    T: Send + 'static,
+    E: Display + Send + 'static,
+{
+    fn into_dynamic(self) -> Dynamic<Validation> {
+        self.map_each(|result| match result {
+            Ok(_) => Validation::Valid,
+            Err(err) => Validation::Invalid(err.to_string()),
+        })
+    }
+}
+
 /// A grouping of validations that can be checked simultaneously.
 #[derive(Debug, Default, Clone)]
 pub struct Validations {
@@ -2135,13 +2176,17 @@ impl WhenValidation<'_> {
     /// The validation is linked with `self` such that checking `self`'s
     /// validation status will include this validation.
     #[must_use]
-    pub fn validate_result<E>(&self, result: impl IntoDynamic<Result<(), E>>) -> Dynamic<Validation>
+    pub fn validate_result<T, E>(
+        &self,
+        result: impl IntoDynamic<Result<T, E>>,
+    ) -> Dynamic<Validation>
     where
+        T: Send + 'static,
         E: Display + Send + 'static,
     {
         let result = result.into_dynamic();
         let error_message = result.map_each(move |value| match value {
-            Ok(()) => None,
+            Ok(_) => None,
             Err(err) => Some(err.to_string()),
         });
 

src/widgets/grid.rs

@@ -800,6 +800,15 @@ impl<const N: usize> GridWidgets<N> {
     }
 }
 
+impl<T, const N: usize> From<Vec<T>> for GridWidgets<N>
+where
+    T: Into<GridSection<N>>,
+{
+    fn from(value: Vec<T>) -> Self {
+        Self(value.into_iter().map(T::into).collect())
+    }
+}
+
 impl<T, const N: usize> From<T> for GridWidgets<N>
 where
     T: Into<GridSection<N>>,
@@ -851,6 +860,18 @@ where
     }
 }
 
+impl<const N: usize, T> From<[T; N]> for GridSection<N>
+where
+    T: MakeWidget,
+{
+    fn from(values: [T; N]) -> Self {
+        let mut widgets = values.into_iter();
+        Self(array::from_fn(|_| {
+            widgets.next().assert("length checked").make_widget()
+        }))
+    }
+}
+
 impl<const N: usize> Deref for GridSection<N> {
     type Target = [WidgetInstance; N];
 

src/widgets/input.rs

@@ -1099,7 +1099,7 @@ where
                         .translate_by(padding),
                     );
                 }
-            } else if window_focused {
+            } else if window_focused && context.enabled() {
                 let (location, _) =
                     Self::point_from_cursor(cache.measured, cache.cursor, cache.bytes);
                 if cursor_state.visible {

src/window.rs

@@ -637,6 +637,7 @@ where
         let root_mode = self.constrain_window_resizing(resizable, &mut window, graphics);
 
         let graphics = self.contents.new_frame(graphics);
+        let mut current_font_family = None;
         let mut context = GraphicsContext {
             widget: WidgetContext::new(
                 self.root.clone(),
@@ -646,7 +647,7 @@ where
                 self.theme_mode.get(),
                 &mut self.cursor,
             ),
-            gfx: Exclusive::Owned(Graphics::new(graphics)),
+            gfx: Exclusive::Owned(Graphics::new(graphics, &mut current_font_family)),
         };
         self.theme_mode.redraw_when_changed(&context);
         let mut layout_context = LayoutContext::new(&mut context);