Draft basic styling for Container

wgpu/src/renderer/widget/container.rs

@@ -0,0 +1,46 @@
+use crate::{container, defaults, Defaults, Primitive, Renderer};
+use iced_native::{Element, Layout, Point, Rectangle};
+
+impl iced_native::container::Renderer for Renderer {
+    type Style = Box<dyn container::StyleSheet>;
+
+    fn draw<Message>(
+        &mut self,
+        defaults: &Defaults,
+        bounds: Rectangle,
+        cursor_position: Point,
+        style_sheet: &Self::Style,
+        content: &Element<'_, Message, Self>,
+        content_layout: Layout<'_>,
+    ) -> Self::Output {
+        let style = style_sheet.style();
+
+        let defaults = Defaults {
+            text: defaults::Text {
+                color: style.text_color.unwrap_or(defaults.text.color),
+            },
+            ..*defaults
+        };
+
+        let (content, mouse_cursor) =
+            content.draw(self, &defaults, content_layout, cursor_position);
+
+        match style.background {
+            Some(background) => {
+                let quad = Primitive::Quad {
+                    bounds,
+                    background,
+                    border_radius: style.border_radius,
+                };
+
+                (
+                    Primitive::Group {
+                        primitives: vec![quad, content],
+                    },
+                    mouse_cursor,
+                )
+            }
+            None => (content, mouse_cursor),
+        }
+    }
+}