From fac7f2beb0380a289af2fb4239ba1ee9c814bfbf Mon Sep 17 00:00:00 2001
From: Ellpeck <megamaximal@gmail.com>
Date: Tue, 20 Aug 2019 21:41:22 +0200
Subject: [PATCH] propagate mouse events to children by default, except for
 panels that handle overflow

---
 MLEM.Ui/Elements/Element.cs | 6 ++----
 MLEM.Ui/Elements/Panel.cs   | 7 +++++++
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/MLEM.Ui/Elements/Element.cs b/MLEM.Ui/Elements/Element.cs
index ebe281b..f9aacbc 100644
--- a/MLEM.Ui/Elements/Element.cs
+++ b/MLEM.Ui/Elements/Element.cs
@@ -402,17 +402,15 @@ namespace MLEM.Ui.Elements {
             }
         }
 
-        public Element GetMousedElement() {
+        public virtual Element GetMousedElement() {
             if (this.IsHidden || this.IgnoresMouse)
                 return null;
-            if (!this.Area.Contains(this.MousePos))
-                return null;
             for (var i = this.SortedChildren.Count - 1; i >= 0; i--) {
                 var element = this.SortedChildren[i].GetMousedElement();
                 if (element != null)
                     return element;
             }
-            return this;
+            return this.Area.Contains(this.MousePos) ? this : null;
         }
 
         protected virtual void InitStyle(UiStyle style) {
diff --git a/MLEM.Ui/Elements/Panel.cs b/MLEM.Ui/Elements/Panel.cs
index 6470720..82712d0 100644
--- a/MLEM.Ui/Elements/Panel.cs
+++ b/MLEM.Ui/Elements/Panel.cs
@@ -106,6 +106,13 @@ namespace MLEM.Ui.Elements {
             base.DrawEarly(time, batch, alpha, blendState, samplerState);
         }
 
+        public override Element GetMousedElement() {
+            // if overflow is handled, don't propagate mouse checks to hidden children
+            if (this.scrollOverflow && !this.Area.Contains(this.MousePos))
+                return null;
+            return base.GetMousedElement();
+        }
+
         private Rectangle GetRenderTargetArea() {
             var area = this.ChildPaddedArea;
             area.X = this.DisplayArea.X;