Implement pencil and line tool

src/image_button.rs

@@ -1,18 +1,11 @@
 use iced::advanced::layout::{self, Layout};
-use iced::advanced::{renderer, Clipboard};
 use iced::advanced::widget::{self, Widget};
+use iced::advanced::{Clipboard, renderer};
 use iced::mouse;
 use iced::{Element, Event, Length, Rectangle, Size};
 
 // We need the image renderer trait
 use iced::advanced::image as img;
-// ---------- State ----------
-
-/// Internal state tracking whether the button is currently pressed.
-#[derive(Default)]
-pub struct State {
-    is_pressed: bool,
-}
 
 // ---------- Widget struct ----------
 
@@ -26,7 +19,11 @@ pub struct ImageButton<Handle, Message> {
     is_pressed: bool,
 }
 
-pub fn image_button<Handle, Message>(normal: impl Into<Handle>, pressed: impl Into<Handle>, is_pressed: bool) -> ImageButton<Handle, Message> {
+pub fn image_button<Handle, Message>(
+    normal: impl Into<Handle>,
+    pressed: impl Into<Handle>,
+    is_pressed: bool,
+) -> ImageButton<Handle, Message> {
     ImageButton::new(normal, pressed, is_pressed)
 }
 
@@ -68,22 +65,12 @@ impl<Handle, Message> ImageButton<Handle, Message> {
 // ---------- Widget impl ----------
 
 impl<Message, Theme, Renderer, Handle> Widget<Message, Theme, Renderer>
-for ImageButton<Handle, Message>
+    for ImageButton<Handle, Message>
 where
     Renderer: img::Renderer<Handle = Handle>,
     Handle: Clone,
     Message: Clone,
 {
-    // --- Tree (internal state) ---
-
-    fn tag(&self) -> widget::tree::Tag {
-        widget::tree::Tag::of::<State>()
-    }
-
-    fn state(&self) -> widget::tree::State {
-        widget::tree::State::new(State::default())
-    }
-
     // --- Size ---
 
     fn size(&self) -> Size<Length> {
@@ -116,7 +103,7 @@ where
 
     fn update(
         &mut self,
-        tree: &mut widget::Tree,
+        _tree: &mut widget::Tree,
         event: &Event,
         layout: Layout<'_>,
         cursor: mouse::Cursor,
@@ -125,7 +112,6 @@ where
         shell: &mut iced::advanced::Shell<'_, Message>,
         _viewport: &Rectangle,
     ) {
-        let state = tree.state.downcast_mut::<State>();
         let bounds = layout.bounds();
 
         match event {
@@ -163,7 +149,7 @@ where
 
     fn draw(
         &self,
-        tree: &widget::Tree,
+        _tree: &widget::Tree,
         renderer: &mut Renderer,
         _theme: &Theme,
         _style: &renderer::Style,
@@ -171,7 +157,6 @@ where
         _cursor: mouse::Cursor,
         _viewport: &Rectangle,
     ) {
-        let state = tree.state.downcast_ref::<State>();
         let bounds = layout.bounds();
 
         // Pick the correct image handle.
@@ -199,7 +184,7 @@ where
 // ---------- Into<Element> ----------
 
 impl<'a, Message, Theme, Renderer, Handle> From<ImageButton<Handle, Message>>
-for Element<'a, Message, Theme, Renderer>
+    for Element<'a, Message, Theme, Renderer>
 where
     Renderer: img::Renderer<Handle = Handle> + 'a,
     Handle: Clone + 'a,
@@ -209,4 +194,4 @@ where
     fn from(widget: ImageButton<Handle, Message>) -> Self {
         Self::new(widget)
     }
-}
+}