add widget impl

src/widget/toaster/widget.rs

@@ -1,41 +1,41 @@
 // Copyright 2024 wiiznokes
 // SPDX-License-Identifier: MIT
 
-use iced::Size;
+use iced::{Limits, Size};
+use iced_core::layout::Node;
 use iced_runtime::core::widget::Id;
 use iced_runtime::{keyboard, Command};
 
 use iced_core::event::{self, Event};
 use iced_core::renderer::{self, Quad, Renderer};
-use iced_core::touch;
 use iced_core::widget::tree::{self, Tree};
 use iced_core::widget::Operation;
 use iced_core::Element;
 use iced_core::{layout, svg};
 use iced_core::{mouse, Border};
 use iced_core::{overlay, Shadow};
+use iced_core::{touch, Overlay};
 use iced_core::{
     Background, Clipboard, Color, Layout, Length, Padding, Point, Rectangle, Shell, Vector, Widget,
 };
 use iced_renderer::core::widget::{operation, OperationOutputWrapper};
 
-
-
-use super::Toasts;
-
 pub struct Toaster<'a, Message, Theme, Renderer> {
     toasts: Element<'a, Message, Theme, Renderer>,
     content: Element<'a, Message, Theme, Renderer>,
+    is_empty: bool,
 }
 
 impl<'a, Message, Theme, Renderer> Toaster<'a, Message, Theme, Renderer> {
     pub fn new(
         toasts: Element<'a, Message, Theme, Renderer>,
         content: Element<'a, Message, Theme, Renderer>,
+        is_empty: bool,
     ) -> Self {
         Self {
             toasts,
             content,
+            is_empty,
         }
     }
 }
@@ -46,7 +46,7 @@ where
     Renderer: iced_core::Renderer,
 {
     fn size(&self) -> Size<Length> {
-        todo!()
+        self.content.as_widget().size()
     }
 
     fn layout(
@@ -55,18 +55,9 @@ where
         renderer: &Renderer,
         limits: &layout::Limits,
     ) -> layout::Node {
-        todo!()
-    }
-
-    fn mouse_interaction(
-        &self,
-        _state: &Tree,
-        _layout: Layout<'_>,
-        _cursor: mouse::Cursor,
-        _viewport: &Rectangle,
-        _renderer: &Renderer,
-    ) -> mouse::Interaction {
-        todo!()
+        self.content
+            .as_widget()
+            .layout(&mut tree.children[0], renderer, limits)
     }
 
     fn draw(
@@ -79,6 +70,183 @@ where
         cursor: mouse::Cursor,
         viewport: &Rectangle,
     ) {
+        self.content.as_widget().draw(
+            &tree.children[0],
+            renderer,
+            theme,
+            style,
+            layout,
+            cursor,
+            viewport,
+        );
+    }
+
+    fn children(&self) -> Vec<Tree> {
+        vec![Tree::new(&self.content), Tree::new(&self.toasts)]
+    }
+
+    fn diff(&mut self, tree: &mut Tree) {
+        tree.diff_children(&mut [&mut self.content, &mut self.toasts]);
+    }
+
+    fn operate<'b>(
+        &'b self,
+        state: &'b mut Tree,
+        layout: Layout<'_>,
+        renderer: &Renderer,
+        operation: &mut dyn Operation<OperationOutputWrapper<Message>>,
+    ) {
+        self.content
+            .as_widget()
+            .operate(&mut state.children[0], layout, renderer, operation);
+    }
+
+    fn on_event(
+        &mut self,
+        state: &mut Tree,
+        event: Event,
+        layout: Layout<'_>,
+        cursor: mouse::Cursor,
+        renderer: &Renderer,
+        clipboard: &mut dyn Clipboard,
+        shell: &mut Shell<'_, Message>,
+        viewport: &Rectangle,
+    ) -> event::Status {
+        self.content.as_widget_mut().on_event(
+            &mut state.children[0],
+            event,
+            layout,
+            cursor,
+            renderer,
+            clipboard,
+            shell,
+            viewport,
+        )
+    }
+
+    fn mouse_interaction(
+        &self,
+        state: &Tree,
+        layout: Layout<'_>,
+        cursor: mouse::Cursor,
+        viewport: &Rectangle,
+        renderer: &Renderer,
+    ) -> mouse::Interaction {
+        self.content.as_widget().mouse_interaction(
+            &state.children[0],
+            layout,
+            cursor,
+            viewport,
+            renderer,
+        )
+    }
+
+    fn overlay<'b>(
+        &'b mut self,
+        state: &'b mut Tree,
+        layout: Layout<'_>,
+        renderer: &Renderer,
+    ) -> Option<overlay::Element<'b, Message, Theme, Renderer>> {
+        if self.is_empty {
+            None
+        } else {
+            let bounds = layout.bounds();
+
+            Some(overlay::Element::new(
+                bounds.position(),
+                Box::new(ToasterOverlay::new(
+                    &mut state.children[1],
+                    &mut self.toasts,
+                )),
+            ))
+        }
+    }
+}
+
+struct ToasterOverlay<'a, 'b, Message, Theme = iced::Theme, Renderer = iced::Renderer> {
+    state: &'b mut Tree,
+    element: &'b mut Element<'a, Message, Theme, Renderer>,
+}
+
+impl<'a, 'b, Message, Theme, Renderer> ToasterOverlay<'a, 'b, Message, Theme, Renderer>
+where
+    Renderer: renderer::Renderer,
+{
+    fn new(state: &'b mut Tree, element: &'b mut Element<'a, Message, Theme, Renderer>) -> Self {
+        Self { state, element }
+    }
+}
+
+impl<'a, 'b, Message, Theme, Renderer> Overlay<Message, Theme, Renderer>
+    for ToasterOverlay<'a, 'b, Message, Theme, Renderer>
+where
+    Renderer: renderer::Renderer,
+{
+    fn layout(
+        &mut self,
+        renderer: &Renderer,
+        bounds: Size,
+        position: Point,
+        _translation: Vector,
+    ) -> Node {
+        todo!()
+    }
+
+    fn draw(
+        &self,
+        renderer: &mut Renderer,
+        theme: &Theme,
+        style: &renderer::Style,
+        layout: Layout<'_>,
+        cursor: mouse::Cursor,
+    ) {
+        let bounds = layout.bounds();
+        self.element
+            .as_widget()
+            .draw(self.state, renderer, theme, style, layout, cursor, &bounds);
+    }
+
+    fn on_event(
+        &mut self,
+        event: Event,
+        layout: Layout<'_>,
+        cursor: mouse::Cursor,
+        renderer: &Renderer,
+        clipboard: &mut dyn Clipboard,
+        shell: &mut Shell<Message>,
+    ) -> event::Status {
+        self.element.as_widget_mut().on_event(
+            self.state,
+            event,
+            layout,
+            cursor,
+            renderer,
+            clipboard,
+            shell,
+            &layout.bounds(),
+        )
+    }
+
+    fn mouse_interaction(
+        &self,
+        layout: Layout<'_>,
+        cursor: mouse::Cursor,
+        viewport: &Rectangle,
+        renderer: &Renderer,
+    ) -> mouse::Interaction {
+        self.element
+            .as_widget()
+            .mouse_interaction(self.state, layout, cursor, viewport, renderer)
+    }
+
+    fn overlay<'c>(
+        &'c mut self,
+        layout: Layout<'_>,
+        renderer: &Renderer,
+    ) -> Option<overlay::Element<'c, Message, Theme, Renderer>> {
+        self.element
+            .as_widget_mut()
+            .overlay(self.state, layout, renderer)
     }
 }
 
@@ -87,7 +255,7 @@ impl<'a, Message, Theme, Renderer> From<Toaster<'a, Message, Theme, Renderer>>
 where
     Renderer: renderer::Renderer + 'a,
     Theme: 'a,
-    Message: 'a
+    Message: 'a,
 {
     fn from(
         toggler: Toaster<'a, Message, Theme, Renderer>,