Draft first working version of iced_glow 🎉

glow/src/renderer/widget/button.rs

@@ -0,0 +1,93 @@
+use crate::{button::StyleSheet, defaults, Defaults, Primitive, Renderer};
+use iced_native::{
+    mouse, Background, Color, Element, Layout, Point, Rectangle, Vector,
+};
+
+impl iced_native::button::Renderer for Renderer {
+    const DEFAULT_PADDING: u16 = 5;
+
+    type Style = Box<dyn StyleSheet>;
+
+    fn draw<Message>(
+        &mut self,
+        _defaults: &Defaults,
+        bounds: Rectangle,
+        cursor_position: Point,
+        is_disabled: bool,
+        is_pressed: bool,
+        style: &Box<dyn StyleSheet>,
+        content: &Element<'_, Message, Self>,
+        content_layout: Layout<'_>,
+    ) -> Self::Output {
+        let is_mouse_over = bounds.contains(cursor_position);
+
+        let styling = if is_disabled {
+            style.disabled()
+        } else if is_mouse_over {
+            if is_pressed {
+                style.pressed()
+            } else {
+                style.hovered()
+            }
+        } else {
+            style.active()
+        };
+
+        let (content, _) = content.draw(
+            self,
+            &Defaults {
+                text: defaults::Text {
+                    color: styling.text_color,
+                },
+            },
+            content_layout,
+            cursor_position,
+        );
+
+        (
+            if styling.background.is_some() || styling.border_width > 0 {
+                let background = Primitive::Quad {
+                    bounds,
+                    background: styling
+                        .background
+                        .unwrap_or(Background::Color(Color::TRANSPARENT)),
+                    border_radius: styling.border_radius,
+                    border_width: styling.border_width,
+                    border_color: styling.border_color,
+                };
+
+                if styling.shadow_offset == Vector::default() {
+                    Primitive::Group {
+                        primitives: vec![background, content],
+                    }
+                } else {
+                    // TODO: Implement proper shadow support
+                    let shadow = Primitive::Quad {
+                        bounds: Rectangle {
+                            x: bounds.x + styling.shadow_offset.x,
+                            y: bounds.y + styling.shadow_offset.y,
+                            ..bounds
+                        },
+                        background: Background::Color(
+                            [0.0, 0.0, 0.0, 0.5].into(),
+                        ),
+                        border_radius: styling.border_radius,
+                        border_width: 0,
+                        border_color: Color::TRANSPARENT,
+                    };
+
+                    Primitive::Group {
+                        primitives: vec![shadow, background, content],
+                    }
+                }
+            } else {
+                content
+            },
+            if is_mouse_over {
+                mouse::Interaction::Pointer
+            } else {
+                mouse::Interaction::default()
+            },
+        )
+    }
+}