From 2c7c59820e9bd74863d8cd7a578eca0bdbf3b7c9 Mon Sep 17 00:00:00 2001
From: Brian Janssen <tosti007@users.noreply.github.com>
Date: Wed, 16 Aug 2023 12:52:36 +0200
Subject: [PATCH] Expose area::State's Rect in Memory (#3161)

---
 crates/egui/src/containers/area.rs   | 2 ++
 crates/egui/src/containers/window.rs | 3 +++
 crates/egui/src/memory.rs            | 5 +++++
 3 files changed, 10 insertions(+)

diff --git a/crates/egui/src/containers/area.rs b/crates/egui/src/containers/area.rs
index 953391ca..f493c20c 100644
--- a/crates/egui/src/containers/area.rs
+++ b/crates/egui/src/containers/area.rs
@@ -55,6 +55,8 @@ impl State {
 ///     });
 /// # });
 /// ```
+///
+/// The previous rectangle used by this area can be obtained through [`crate::Memory::area_rect()`].
 #[must_use = "You should call .show()"]
 #[derive(Clone, Copy, Debug)]
 pub struct Area {
diff --git a/crates/egui/src/containers/window.rs b/crates/egui/src/containers/window.rs
index 2e4a9a3e..ca4f6190 100644
--- a/crates/egui/src/containers/window.rs
+++ b/crates/egui/src/containers/window.rs
@@ -21,6 +21,9 @@ use super::*;
 ///    ui.label("Hello World!");
 /// });
 /// # });
+/// ```
+///
+/// The previous rectangle used by this window can be obtained through [`crate::Memory::area_rect()`].
 #[must_use = "You should call .show()"]
 pub struct Window<'open> {
     title: WidgetText,
diff --git a/crates/egui/src/memory.rs b/crates/egui/src/memory.rs
index d89fd344..ede4fb70 100644
--- a/crates/egui/src/memory.rs
+++ b/crates/egui/src/memory.rs
@@ -487,6 +487,11 @@ impl Memory {
     pub fn reset_areas(&mut self) {
         self.areas = Default::default();
     }
+
+    /// Obtain the previous rectangle of an area.
+    pub fn area_rect(&self, id: impl Into<Id>) -> Option<Rect> {
+        self.areas.get(id.into()).map(|state| state.rect())
+    }
 }
 
 /// ## Popups