Draft basic styling for Container

wgpu/src/renderer/widget.rs

@@ -1,6 +1,7 @@
 mod button;
 mod checkbox;
 mod column;
+mod container;
 mod image;
 mod radio;
 mod row;

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),
+        }
+    }
+}

wgpu/src/widget.rs

@@ -1 +1,2 @@
 pub mod button;
+pub mod container;

wgpu/src/widget/container.rs

@@ -0,0 +1,37 @@
+use iced_native::{Background, Color};
+
+#[derive(Debug, Clone, Copy)]
+pub struct Style {
+    pub text_color: Option<Color>,
+    pub background: Option<Background>,
+    pub border_radius: u16,
+}
+
+pub trait StyleSheet {
+    fn style(&self) -> Style {
+        Style {
+            text_color: None,
+            background: None,
+            border_radius: 0,
+        }
+    }
+}
+
+struct Default;
+
+impl StyleSheet for Default {}
+
+impl std::default::Default for Box<dyn StyleSheet> {
+    fn default() -> Self {
+        Box::new(Default)
+    }
+}
+
+impl<T> From<T> for Box<dyn StyleSheet>
+where
+    T: 'static + StyleSheet,
+{
+    fn from(style: T) -> Self {
+        Box::new(style)
+    }
+}