Create iced_widget subcrate and re-organize the whole codebase

widget/src/canvas/event.rs

@@ -0,0 +1,21 @@
+//! Handle events of a canvas.
+use crate::core::keyboard;
+use crate::core::mouse;
+use crate::core::touch;
+
+pub use crate::core::event::Status;
+
+/// A [`Canvas`] event.
+///
+/// [`Canvas`]: crate::widget::Canvas
+#[derive(Debug, Clone, Copy, PartialEq)]
+pub enum Event {
+    /// A mouse event.
+    Mouse(mouse::Event),
+
+    /// A touch event.
+    Touch(touch::Event),
+
+    /// A keyboard event.
+    Keyboard(keyboard::Event),
+}