Create iced_widget subcrate and re-organize the whole codebase

core/src/window/event.rs

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+use crate::time::Instant;
+
+use std::path::PathBuf;
+
+/// A window-related event.
+#[derive(PartialEq, Eq, Clone, Debug)]
+pub enum Event {
+    /// A window was moved.
+    Moved {
+        /// The new logical x location of the window
+        x: i32,
+        /// The new logical y location of the window
+        y: i32,
+    },
+
+    /// A window was resized.
+    Resized {
+        /// The new logical width of the window
+        width: u32,
+        /// The new logical height of the window
+        height: u32,
+    },
+
+    /// A window redraw was requested.
+    ///
+    /// The [`Instant`] contains the current time.
+    RedrawRequested(Instant),
+
+    /// The user has requested for the window to close.
+    ///
+    /// Usually, you will want to terminate the execution whenever this event
+    /// occurs.
+    CloseRequested,
+
+    /// A window was focused.
+    Focused,
+
+    /// A window was unfocused.
+    Unfocused,
+
+    /// A file is being hovered over the window.
+    ///
+    /// When the user hovers multiple files at once, this event will be emitted
+    /// for each file separately.
+    FileHovered(PathBuf),
+
+    /// A file has beend dropped into the window.
+    ///
+    /// When the user drops multiple files at once, this event will be emitted
+    /// for each file separately.
+    FileDropped(PathBuf),
+
+    /// A file was hovered, but has exited the window.
+    ///
+    /// There will be a single `FilesHoveredLeft` event triggered even if
+    /// multiple files were hovered.
+    FilesHoveredLeft,
+}

core/src/window/mode.rs

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+/// The mode of a window-based application.
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum Mode {
+    /// The application appears in its own window.
+    Windowed,
+
+    /// The application takes the whole screen of its current monitor.
+    Fullscreen,
+
+    /// The application is hidden
+    Hidden,
+}

core/src/window/redraw_request.rs

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+use crate::time::Instant;
+
+/// A request to redraw a window.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
+pub enum RedrawRequest {
+    /// Redraw the next frame.
+    NextFrame,
+
+    /// Redraw at the given time.
+    At(Instant),
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use std::time::{Duration, Instant};
+
+    #[test]
+    fn ordering() {
+        let now = Instant::now();
+        let later = now + Duration::from_millis(10);
+
+        assert_eq!(RedrawRequest::NextFrame, RedrawRequest::NextFrame);
+        assert_eq!(RedrawRequest::At(now), RedrawRequest::At(now));
+
+        assert!(RedrawRequest::NextFrame < RedrawRequest::At(now));
+        assert!(RedrawRequest::At(now) > RedrawRequest::NextFrame);
+        assert!(RedrawRequest::At(now) < RedrawRequest::At(later));
+        assert!(RedrawRequest::At(later) > RedrawRequest::At(now));
+
+        assert!(RedrawRequest::NextFrame <= RedrawRequest::NextFrame);
+        assert!(RedrawRequest::NextFrame <= RedrawRequest::At(now));
+        assert!(RedrawRequest::At(now) >= RedrawRequest::NextFrame);
+        assert!(RedrawRequest::At(now) <= RedrawRequest::At(now));
+        assert!(RedrawRequest::At(now) <= RedrawRequest::At(later));
+        assert!(RedrawRequest::At(later) >= RedrawRequest::At(now));
+    }
+}

core/src/window/user_attention.rs

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+/// The type of user attention to request.
+///
+/// ## Platform-specific
+///
+/// - **X11:** Sets the WM's `XUrgencyHint`. No distinction between [`Critical`] and [`Informational`].
+///
+/// [`Critical`]: Self::Critical
+/// [`Informational`]: Self::Informational
+#[derive(Debug, Clone, Copy)]
+pub enum UserAttention {
+    /// ## Platform-specific
+    ///
+    /// - **macOS:** Bounces the dock icon until the application is in focus.
+    /// - **Windows:** Flashes both the window and the taskbar button until the application is in focus.
+    Critical,
+    /// ## Platform-specific
+    ///
+    /// - **macOS:** Bounces the dock icon once.
+    /// - **Windows:** Flashes the taskbar button until the application is in focus.
+    Informational,
+}