Make it so separators are always clamped between their bounds

CHANGELOG.md

@@ -1,5 +1,11 @@
 # egui_dock changelog
 
+## egui_dock 0.18.0 - unreleased
+
+### Changed
+
+- Node separators are always clamped between their bounds. ([#289](https://github.com/Adanos020/egui_dock/pull/289))
+
 ## egui_dock 0.17.0 - 2025/07/13
 
 ### Breaking changes

src/widgets/dock_area/show/mod.rs

@@ -565,20 +565,12 @@ impl<Tab> DockArea<'_, Tab> {
                 // Update 'fraction' interaction after drawing separator,
                 // otherwise it may overlap on other separator / bodies when
                 // shrunk fast.
-                if let Some(pos) = response.interact_pointer_pos().or(arrow_key_offset.map(|v| separator.center() + v)) {
-                    let dim_point = pos.dim_point;
-                    let delta = arrow_key_offset.unwrap_or(response.drag_delta()).dim_point;
-
-                    if (delta > 0. && dim_point > midpoint && dim_point < rect.max.dim_point)
-                        || (delta < 0. && dim_point < midpoint && dim_point > rect.min.dim_point)
-                    {
-                        let range = rect.max.dim_point - rect.min.dim_point;
-                        let min = (style.separator.extra / range).min(1.0);
-                        let max = 1.0 - min;
-                        let (min, max) = (min.min(max), max.max(min));
-                        split.fraction = (split.fraction + delta / range).clamp(min, max);
-                    }
-                }
+                let range = rect.max.dim_point - rect.min.dim_point;
+                let min = (style.separator.extra / range).min(1.0);
+                let max = 1.0 - min;
+                let (min, max) = (min.min(max), max.max(min));
+                let delta = arrow_key_offset.unwrap_or(response.drag_delta()).dim_point;
+                split.fraction = (split.fraction + delta / range).clamp(min, max);
 
                 if response.double_clicked() {
                     split.fraction = 0.5;