Use `BTreeMap` for splits and regions in `pane_grid`

This preserves ordering between calls to update and draw logic.

1 files changed, 3 insertions, 3 deletions

diff --git a/native/src/widget/pane_grid/state.rs b/native/src/widget/pane_grid/state.rs
index 666e1ca0..fb96f89f 100644
--- a/native/src/widget/pane_grid/state.rs
+++ b/native/src/widget/pane_grid/state.rs
@@ -3,7 +3,7 @@ use crate::{
     Hasher, Point, Rectangle, Size,
 };
 
-use std::collections::HashMap;
+use std::collections::{BTreeMap, HashMap};
 
 /// The state of a [`PaneGrid`].
 ///
@@ -257,7 +257,7 @@ impl Internal {
         &self,
         spacing: f32,
         size: Size,
-    ) -> HashMap<Pane, Rectangle> {
+    ) -> BTreeMap<Pane, Rectangle> {
         self.layout.pane_regions(spacing, size)
     }
 
@@ -265,7 +265,7 @@ impl Internal {
         &self,
         spacing: f32,
         size: Size,
-    ) -> HashMap<Split, (Axis, Rectangle, f32)> {
+    ) -> BTreeMap<Split, (Axis, Rectangle, f32)> {
         self.layout.split_regions(spacing, size)
     }