Move mod-level docstring to DragAndDrop

crates/egui/src/drag_and_drop.rs

@@ -1,18 +1,17 @@
-//! Support for drag-and-drop in egui.
-//!
-//! This module implements the low-level drag-and-drop API with support for manually saving, retrieving, and clearing
-//! drag-and-drop payloads. This enables the maximum flexibility for complex drag-and-drop interactions.
-//!
-//! For a higher-level API, see:
-//! - [`crate::Ui::dnd_drag_source`],
-//! - [`crate::Ui::dnd_drop_zone`],
-//! - and the drag-related functions in [`crate::Response`].
-
 use std::{any::Any, sync::Arc};
 
 use crate::{Context, CursorIcon, Id};
 
-/// Helpers for drag-and-drop in egui.
+/// Tracking of drag-and-drop payload.
+///
+/// This is a low-level API.
+///
+/// For a higher-level API, see:
+/// - [`crate::Ui::dnd_drag_source`]
+/// - [`crate::Ui::dnd_drop_zone`]
+/// - [`crate::Response::dnd_set_drag_payload`]
+/// - [`crate::Response::dnd_hover_payload`]
+/// - [`crate::Response::dnd_release_payload`]
 ///
 /// See [this example](https://github.com/emilk/egui/blob/master/crates/egui_demo_lib/src/demo/drag_and_drop.rs).
 #[doc(alias = "drag and drop")]