Refactor ScrollBars to their own widget

Closes #181

CHANGELOG.md

@@ -57,6 +57,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   - `MakeWidgetList::into_layers` -> `IntoWidgetList::into_layers`
   - `MakeWidgetList::into_wrap` -> `IntoWidgetList::into_wrap`
   - `MakeWidgetList::into_list` -> `IntoWidgetList::into_list`
+- `ConstraintLimit::fit_measured` and `FitMeasuredSize::fit_measured` now accept
+  either a `Px` or `UPx` measurement, and does not perform scaling adjustments.
+  To convert `Lp` use `into_upx()` first.
 
 ### Changed
 
@@ -115,6 +118,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   allow overdrawing the widget's bounds. This was noticable in the
   nested-scroll.rs example when reducing the height of the window below 6
   inches.
+- `Scroll` now uses the new `ScrollBar` widget for its bars rather than manually
+  drawing them. By making this change, the bars now have input priority over the
+  contents. This means that the scroll bars are now clickable even in areas
+  where interactive widgets are beneath them.
 
 ### Added
 
@@ -252,6 +259,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `Scroll` now exposes its scroll amount, maximum scroll, and more information
   that allows completely customizing a scroll view's behavior. Thanks to
   @danbulant for helping with this change!
+- `ScrollBar` is a new widget that renders a scroll bar meant to scroll through
+  a large container.
 
 
 [139]: https://github.com/khonsulabs/cushy/issues/139

examples/nested-scroll.rs

@@ -1,7 +1,7 @@
 use cushy::figures::units::Lp;
 use cushy::kludgine::cosmic_text::FamilyOwned;
 use cushy::styles::components::FontFamily;
-use cushy::styles::FontFamilyList;
+use cushy::styles::{Edges, FontFamilyList};
 use cushy::widget::MakeWidget;
 use cushy::Run;
 
@@ -17,6 +17,7 @@ fn main() -> cushy::Result {
                 .height(Lp::inches(3)),
         )
         .into_rows()
+        .pad_by(Edges::default().with_right(Lp::points(7)))
         .vertical_scroll()
         .expand()
         .run()

examples/tilemap.rs

@@ -3,18 +3,15 @@ use std::cmp::Ordering;
 use std::time::Duration;
 
 use cushy::figures::units::Px;
-use cushy::figures::FloatConversion;
-use cushy::figures::{Point, Rect, Size};
-use cushy::kludgine::app::winit::keyboard::Key;
-use cushy::kludgine::app::winit::keyboard::NamedKey;
+use cushy::figures::{FloatConversion, Point, Rect, Size};
+use cushy::kludgine::app::winit::keyboard::{Key, NamedKey};
 use cushy::kludgine::drawing::Renderer;
 use cushy::kludgine::shapes::Shape;
 use cushy::kludgine::sprite::{Sprite, SpriteSource};
 use cushy::kludgine::tilemap::{
     DebugGrid, Object, ObjectLayer, TileArray, TileKind, TileMapFocus, TILE_SIZE,
 };
-use cushy::kludgine::Color;
-use cushy::kludgine::{include_aseprite_sprite, DrawableExt};
+use cushy::kludgine::{include_aseprite_sprite, Color, DrawableExt};
 use cushy::value::{Destination, Dynamic};
 use cushy::widgets::TileMap;
 use cushy::{Run, Tick};