Merge pull request #1856 from jhff/pane_grid_split_with_dragged_pane

[Feature] Enhance PaneGrid to split panes by drag & drop

examples/pane_grid/src/main.rs

@@ -108,8 +108,9 @@ impl Application for Example {
             Message::Dragged(pane_grid::DragEvent::Dropped {
                 pane,
                 target,
+                region,
             }) => {
-                self.panes.swap(&pane, &target);
+                self.panes.split_with(&target, &pane, region);
             }
             Message::Dragged(_) => {}
             Message::TogglePin(pane) => {
@@ -255,6 +256,7 @@ fn handle_hotkey(key_code: keyboard::KeyCode) -> Option<Message> {
     }
 }
 
+#[derive(Clone, Copy)]
 struct Pane {
     id: usize,
     pub is_pinned: bool,