Merge unnecessary split widget modules

graphics/src/widget/checkbox.rs

@@ -1,5 +1,9 @@
 //! Show toggle controls using checkboxes.
-use crate::Renderer;
+use crate::backend::{self, Backend};
+use crate::{Primitive, Renderer};
+use iced_native::checkbox;
+use iced_native::mouse;
+use iced_native::{HorizontalAlignment, Rectangle, VerticalAlignment};
 
 pub use iced_style::checkbox::{Style, StyleSheet};
 
@@ -8,3 +12,65 @@ pub use iced_style::checkbox::{Style, StyleSheet};
 /// This is an alias of an `iced_native` checkbox with an `iced_wgpu::Renderer`.
 pub type Checkbox<Message, Backend> =
     iced_native::Checkbox<Message, Renderer<Backend>>;
+
+impl<B> checkbox::Renderer for Renderer<B>
+where
+    B: Backend + backend::Text,
+{
+    type Style = Box<dyn StyleSheet>;
+
+    const DEFAULT_SIZE: u16 = 20;
+    const DEFAULT_SPACING: u16 = 15;
+
+    fn draw(
+        &mut self,
+        bounds: Rectangle,
+        is_checked: bool,
+        is_mouse_over: bool,
+        (label, _): Self::Output,
+        style_sheet: &Self::Style,
+    ) -> Self::Output {
+        let style = if is_mouse_over {
+            style_sheet.hovered(is_checked)
+        } else {
+            style_sheet.active(is_checked)
+        };
+
+        let checkbox = Primitive::Quad {
+            bounds,
+            background: style.background,
+            border_radius: style.border_radius,
+            border_width: style.border_width,
+            border_color: style.border_color,
+        };
+
+        (
+            Primitive::Group {
+                primitives: if is_checked {
+                    let check = Primitive::Text {
+                        content: B::CHECKMARK_ICON.to_string(),
+                        font: B::ICON_FONT,
+                        size: bounds.height * 0.7,
+                        bounds: Rectangle {
+                            x: bounds.center_x(),
+                            y: bounds.center_y(),
+                            ..bounds
+                        },
+                        color: style.checkmark_color,
+                        horizontal_alignment: HorizontalAlignment::Center,
+                        vertical_alignment: VerticalAlignment::Center,
+                    };
+
+                    vec![checkbox, check, label]
+                } else {
+                    vec![checkbox, label]
+                },
+            },
+            if is_mouse_over {
+                mouse::Interaction::Pointer
+            } else {
+                mouse::Interaction::default()
+            },
+        )
+    }
+}