fill(), expand at root, Space::colored

examples/gameui.rs

@@ -1,11 +1,9 @@
 use gooey::value::Dynamic;
 use gooey::widget::{MakeWidget, HANDLED, IGNORED};
-use gooey::widgets::{Canvas, Input, Label, Stack};
+use gooey::widgets::{Input, Label, Space, Stack};
 use gooey::Run;
 use kludgine::app::winit::event::ElementState;
 use kludgine::app::winit::keyboard::Key;
-use kludgine::figures::{Point, Rect};
-use kludgine::shapes::Shape;
 use kludgine::Color;
 
 fn main() -> gooey::Result {
@@ -14,18 +12,10 @@ fn main() -> gooey::Result {
 
     Stack::rows(
         Stack::columns(
-            Label::new(chat_log.clone()).vertical_scroll().expand().and(
-                Canvas::new(|context| {
-                    let entire_canvas = Rect::from(context.gfx.size());
-                    context.gfx.draw_shape(
-                        &Shape::filled_rect(entire_canvas, Color::RED),
-                        Point::default(),
-                        None,
-                        None,
-                    );
-                })
-                .expand_weighted(2),
-            ),
+            Label::new(chat_log.clone())
+                .vertical_scroll()
+                .expand()
+                .and(Space::colored(Color::RED).expand_weighted(2)),
         )
         .expand()
         .and(Input::new(chat_message.clone()).on_key(move |input| {

src/animation.rs

@@ -17,7 +17,8 @@
 //! ```rust
 //! use std::time::Duration;
 //!
-//! use gooey::animation::{AnimationTarget, EaseInOutElastic, Spawn};
+//! use gooey::animation::easings::EaseInOutElastic;
+//! use gooey::animation::{AnimationTarget, Spawn};
 //! use gooey::value::Dynamic;
 //!
 //! let value = Dynamic::new(0);

src/graphics.rs

@@ -135,6 +135,21 @@ impl<'clip, 'gfx, 'pass> Graphics<'clip, 'gfx, 'pass> {
         self.renderer.scale()
     }
 
+    /// Fills the entire context with `color`.
+    ///
+    /// If the alpha channel of `color` is 0, this function does nothing.
+    pub fn fill(&mut self, color: Color) {
+        if color.alpha() > 0 {
+            let rect = Rect::from(self.region.size);
+            self.draw_shape(
+                &Shape::filled_rect(rect, color),
+                Point::default(),
+                None,
+                None,
+            );
+        }
+    }
+
     /// Draws a shape at the origin, rotating and scaling as needed.
     pub fn draw_shape<Unit>(
         &mut self,

src/styles.rs

@@ -889,6 +889,23 @@ impl ThemePair {
     }
 }
 
+impl Default for ThemePair {
+    fn default() -> Self {
+        const PRIMARY_HUE: f32 = -120.;
+        const SECONDARY_HUE: f32 = 0.;
+        const TERTIARY_HUE: f32 = -30.;
+        const ERROR_HUE: f32 = 30.;
+        Self::from_sources(
+            ColorSource::new(PRIMARY_HUE, 0.8),
+            ColorSource::new(SECONDARY_HUE, 0.3),
+            ColorSource::new(TERTIARY_HUE, 0.3),
+            ColorSource::new(ERROR_HUE, 0.8),
+            ColorSource::new(0., 0.001),
+            ColorSource::new(30., 0.),
+        )
+    }
+}
+
 /// A Gooey Color theme.
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
 pub struct Theme {

src/widgets.rs

@@ -5,7 +5,7 @@ pub mod button;
 mod canvas;
 mod expand;
 mod input;
-mod label;
+pub mod label;
 mod resize;
 pub mod scroll;
 mod space;

src/widgets/button.rs

@@ -6,7 +6,6 @@ use std::time::Duration;
 use kludgine::app::winit::event::{DeviceId, ElementState, KeyEvent, MouseButton};
 use kludgine::figures::units::{Px, UPx};
 use kludgine::figures::{IntoUnsigned, Point, Rect, ScreenScale, Size};
-use kludgine::shapes::Shape;
 use kludgine::text::Text;
 use kludgine::Color;
 
@@ -176,13 +175,8 @@ impl Widget for Button {
         self.label.redraw_when_changed(context);
         self.enabled.redraw_when_changed(context);
 
-        let visible_rect = Rect::from(size - (Px(1), Px(1)));
-
         let (background_color, text_color) = self.current_colors(context);
-        let background = Shape::filled_rect(visible_rect, background_color);
-        context
-            .gfx
-            .draw_shape(&background, Point::default(), None, None);
+        context.gfx.fill(background_color);
 
         if context.focused() {
             context.draw_focus_ring();

src/widgets/expand.rs

@@ -38,7 +38,7 @@ impl Expand {
     #[must_use]
     pub fn empty() -> Self {
         Self {
-            child: WidgetRef::new(Space),
+            child: WidgetRef::new(Space::clear()),
             weight: 1,
         }
     }

src/widgets/label.rs

@@ -1,12 +1,17 @@
+//! A read-only text widget.
+use std::borrow::Cow;
+
 use kludgine::figures::units::{Px, UPx};
 use kludgine::figures::{IntoUnsigned, Point, ScreenScale, Size};
 use kludgine::text::{MeasuredText, Text, TextOrigin};
+use kludgine::Color;
 
-use crate::context::{GraphicsContext, LayoutContext};
+use crate::context::{GraphicsContext, LayoutContext, WidgetContext};
 use crate::styles::components::{IntrinsicPadding, TextColor};
+use crate::styles::{ComponentDefinition, ComponentGroup, ComponentName, NamedComponent};
 use crate::value::{IntoValue, Value};
 use crate::widget::Widget;
-use crate::ConstraintLimit;
+use crate::{ConstraintLimit, Name};
 
 /// A read-only text widget.
 #[derive(Debug)]
@@ -32,7 +37,10 @@ impl Widget for Label {
 
         let size = context.gfx.region().size;
         let center = Point::from(size) / 2;
-        let styles = context.query_styles(&[&TextColor]);
+        let styles = context.query_styles(&[&TextColor, &LabelBackground]);
+
+        let background = styles.get(&LabelBackground, context);
+        context.gfx.fill(background);
 
         if let Some(measured) = &self.prepared_text {
             context
@@ -76,3 +84,27 @@ impl Widget for Label {
         })
     }
 }
+
+impl ComponentGroup for Label {
+    fn name() -> Name {
+        Name::new("Label")
+    }
+}
+
+/// A [`Color`] to be used as a highlight color.
+#[derive(Clone, Copy, Eq, PartialEq, Debug)]
+pub struct LabelBackground;
+
+impl NamedComponent for LabelBackground {
+    fn name(&self) -> Cow<'_, ComponentName> {
+        Cow::Owned(ComponentName::named::<Label>("background_color"))
+    }
+}
+
+impl ComponentDefinition for LabelBackground {
+    type ComponentType = Color;
+
+    fn default_value(&self, _context: &WidgetContext<'_, '_>) -> Color {
+        Color::CLEAR_WHITE
+    }
+}

src/widgets/space.rs

@@ -1,16 +1,48 @@
 use kludgine::figures::units::UPx;
 use kludgine::figures::Size;
+use kludgine::Color;
 
 use crate::context::{GraphicsContext, LayoutContext};
+use crate::value::{IntoValue, Value};
 use crate::widget::Widget;
 use crate::ConstraintLimit;
 
-/// A widget that does nothing and draws nothing.
+/// A widget that occupies space, optionally filling it with a color.
 #[derive(Debug, Clone)]
-pub struct Space;
+pub struct Space {
+    color: Value<Color>,
+}
+
+impl Default for Space {
+    fn default() -> Self {
+        Self::clear()
+    }
+}
+
+impl Space {
+    /// Returns a widget that draws nothing.
+    #[must_use]
+    pub const fn clear() -> Self {
+        Self {
+            color: Value::Constant(Color::CLEAR_BLACK),
+        }
+    }
+
+    /// Returns a widget that fills its space with `color`.
+    #[must_use]
+    pub fn colored(color: impl IntoValue<Color>) -> Self {
+        Self {
+            color: color.into_value(),
+        }
+    }
+}
 
 impl Widget for Space {
-    fn redraw(&mut self, _context: &mut GraphicsContext<'_, '_, '_, '_, '_>) {}
+    fn redraw(&mut self, context: &mut GraphicsContext<'_, '_, '_, '_, '_>) {
+        self.color.redraw_when_changed(context);
+        let color = self.color.get();
+        context.gfx.fill(color);
+    }
 
     fn layout(
         &mut self,

src/widgets/stack.rs

@@ -87,11 +87,10 @@ impl Stack {
                             let guard = widget.lock();
                             let (mut widget, dimension) =
                                 if let Some(expand) = guard.downcast_ref::<Expand>() {
+                                    let weight = expand.weight;
                                     (
-                                        expand.child().clone(),
-                                        StackDimension::Fractional {
-                                            weight: expand.weight,
-                                        },
+                                        WidgetRef::Unmounted(widget.clone()),
+                                        StackDimension::Fractional { weight },
                                     )
                                 } else if let Some((child, size)) =
                                     guard.downcast_ref::<Resize>().and_then(|r| {
@@ -139,8 +138,10 @@ impl Stack {
 
 impl Widget for Stack {
     fn redraw(&mut self, context: &mut GraphicsContext<'_, '_, '_, '_, '_>) {
-        for child in &self.synced_children {
-            context.for_other(child).redraw();
+        for (layout, child) in self.layout.iter().zip(&self.synced_children) {
+            if layout.size > 0 {
+                context.for_other(child).redraw();
+            }
         }
     }
 

src/window.rs

@@ -19,7 +19,6 @@ use kludgine::app::WindowBehavior as _;
 use kludgine::figures::units::{Px, UPx};
 use kludgine::figures::{IntoSigned, IntoUnsigned, Point, Rect, ScreenScale, Size};
 use kludgine::render::Drawing;
-use kludgine::shapes::Shape;
 use kludgine::Kludgine;
 use tracing::Level;
 
@@ -29,14 +28,14 @@ use crate::context::{
 };
 use crate::graphics::Graphics;
 use crate::styles::components::LayoutOrder;
-use crate::styles::{ColorSource, ThemePair};
+use crate::styles::ThemePair;
 use crate::tree::Tree;
 use crate::utils::ModifiersExt;
 use crate::value::{Dynamic, DynamicReader, IntoDynamic, Value};
 use crate::widget::{
     EventHandling, ManagedWidget, Widget, WidgetId, WidgetInstance, HANDLED, IGNORED,
 };
-use crate::widgets::Resize;
+use crate::widgets::{Expand, Resize};
 use crate::window::sealed::WindowCommand;
 use crate::{initialize_tracing, ConstraintLimit, Run};
 
@@ -186,14 +185,7 @@ where
                 ..WindowAttributes::default()
             },
             context,
-            theme: Value::Constant(ThemePair::from_sources(
-                ColorSource::new(-120., 0.8),
-                ColorSource::new(0., 0.3),
-                ColorSource::new(-30., 0.3),
-                ColorSource::new(30., 0.8),
-                ColorSource::new(0., 0.001),
-                ColorSource::new(30., 0.),
-            )),
+            theme: Value::default(),
             occluded: None,
             focused: None,
         }
@@ -330,8 +322,9 @@ where
         resizable: bool,
         window: &kludgine::app::Window<'_, WindowCommand>,
         graphics: &mut kludgine::Graphics<'_>,
-    ) {
+    ) -> bool {
         let mut root_or_child = self.root.widget.clone();
+        let mut is_expanded = false;
         loop {
             let mut widget = root_or_child.lock();
             if let Some(resize) = widget.downcast_ref::<Resize>() {
@@ -366,8 +359,11 @@ where
                     window.set_max_inner_size(new_max_size);
                 }
                 self.max_inner_size = new_max_size;
-                break;
-            } else if let Some(wraps) = widget.as_widget().wraps().cloned() {
+            } else if widget.downcast_ref::<Expand>().is_some() {
+                is_expanded = true;
+            }
+
+            if let Some(wraps) = widget.as_widget().wraps().cloned() {
                 drop(widget);
 
                 root_or_child = wraps;
@@ -375,6 +371,8 @@ where
                 break;
             }
         }
+
+        is_expanded
     }
 }
 
@@ -459,7 +457,7 @@ where
         self.root.tree.reset_render_order();
 
         let resizable = window.winit().is_resizable();
-        self.constrain_window_resizing(resizable, &window, graphics);
+        let is_expanded = self.constrain_window_resizing(resizable, &window, graphics);
 
         let graphics = self.contents.new_frame(graphics);
         let mut window = RunningWindow::new(window, &self.focused, &self.occluded);
@@ -476,16 +474,18 @@ where
         let window_size = layout_context.gfx.size();
 
         let background_color = layout_context.theme().surface.color;
-        layout_context.graphics.gfx.draw_shape(
-            &Shape::filled_rect(window_size.into(), background_color),
-            Point::default(),
-            None,
-            None,
-        );
-        let actual_size = layout_context.layout(Size::new(
-            ConstraintLimit::ClippedAfter(window_size.width),
-            ConstraintLimit::ClippedAfter(window_size.height),
-        ));
+        layout_context.graphics.gfx.fill(background_color);
+        let actual_size = layout_context.layout(if is_expanded {
+            Size::new(
+                ConstraintLimit::Known(window_size.width),
+                ConstraintLimit::Known(window_size.height),
+            )
+        } else {
+            Size::new(
+                ConstraintLimit::ClippedAfter(window_size.width),
+                ConstraintLimit::ClippedAfter(window_size.height),
+            )
+        });
         let render_size = actual_size.min(window_size);
         if render_size != window_size && !resizable {
             let mut new_size = actual_size;