Restore hotkeys in pane_grid example

- Implement `subscription::events_with`
- Remove `pane_grid::KeyPressEvent`
- Return closest sibling in `pane_grid::State::close`

native/src/widget/pane_grid.rs

@@ -29,8 +29,8 @@ pub use state::{Focus, State};
 pub use title_bar::TitleBar;
 
 use crate::{
-    container, keyboard, layout, mouse, overlay, row, text, Clipboard, Element,
-    Event, Hasher, Layout, Length, Point, Rectangle, Size, Vector, Widget,
+    container, layout, mouse, overlay, row, text, Clipboard, Element, Event,
+    Hasher, Layout, Length, Point, Rectangle, Size, Vector, Widget,
 };
 
 /// A collection of panes distributed using either vertical or horizontal splits
@@ -336,18 +336,6 @@ pub struct ResizeEvent {
     pub ratio: f32,
 }
 
-/// An event produced during a key press interaction of a [`PaneGrid`].
-///
-/// [`PaneGrid`]: struct.PaneGrid.html
-#[derive(Debug, Clone, Copy)]
-pub struct KeyPressEvent {
-    /// The key that was pressed.
-    pub key_code: keyboard::KeyCode,
-
-    /// The state of the modifier keys when the key was pressed.
-    pub modifiers: keyboard::ModifiersState,
-}
-
 impl<'a, Message, Renderer> Widget<Message, Renderer>
     for PaneGrid<'a, Message, Renderer>
 where

native/src/widget/pane_grid/state.rs

@@ -227,12 +227,13 @@ impl<T> State<T> {
         let _ = self.internal.layout.resize(split, ratio);
     }
 
-    /// Closes the given [`Pane`] and returns its internal state, if it exists.
+    /// Closes the given [`Pane`] and returns its internal state and its closest
+    /// sibling, if it exists.
     ///
     /// [`Pane`]: struct.Pane.html
-    pub fn close(&mut self, pane: &Pane) -> Option<T> {
-        if let Some(_) = self.internal.layout.remove(pane) {
-            self.panes.remove(pane)
+    pub fn close(&mut self, pane: &Pane) -> Option<(T, Pane)> {
+        if let Some(sibling) = self.internal.layout.remove(pane) {
+            self.panes.remove(pane).map(|state| (state, sibling))
         } else {
             None
         }