From ac0a0c76041b31de3b2f5184bde5ef733892d04c Mon Sep 17 00:00:00 2001
From: rootwhois <53112648+rootwhois@users.noreply.github.com>
Date: Sat, 20 Sep 2025 16:28:59 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E5=A4=8D=20AdvancedListBox=20?=
 =?UTF-8?q?=E5=9C=A8=E9=9D=9E=E5=BF=85=E8=A6=81=E7=9A=84=E6=83=85=E5=86=B5?=
 =?UTF-8?q?=E4=B8=8B=E6=98=BE=E7=A4=BA=E6=BB=9A=E5=8A=A8=E6=9D=A1=E7=9A=84?=
 =?UTF-8?q?=E9=97=AE=E9=A2=98=20(#4514)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Co-authored-by: Glavo <zjx001202@gmail.com>
---
 .../org/jackhuang/hmcl/ui/construct/AdvancedListBox.java | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/HMCL/src/main/java/org/jackhuang/hmcl/ui/construct/AdvancedListBox.java b/HMCL/src/main/java/org/jackhuang/hmcl/ui/construct/AdvancedListBox.java
index e45e116c9..d47ba4e64 100644
--- a/HMCL/src/main/java/org/jackhuang/hmcl/ui/construct/AdvancedListBox.java
+++ b/HMCL/src/main/java/org/jackhuang/hmcl/ui/construct/AdvancedListBox.java
@@ -20,6 +20,7 @@ package org.jackhuang.hmcl.ui.construct;
 import javafx.collections.ObservableList;
 import javafx.scene.Node;
 import javafx.scene.control.ScrollPane;
+import javafx.scene.input.MouseEvent;
 import javafx.scene.layout.Pane;
 import javafx.scene.layout.StackPane;
 import javafx.scene.layout.VBox;
@@ -40,8 +41,16 @@ public class AdvancedListBox extends ScrollPane {
         setFitToHeight(true);
         setFitToWidth(true);
         setHbarPolicy(ScrollBarPolicy.NEVER);
+        setVbarPolicy(ScrollBarPolicy.NEVER);
 
         container.getStyleClass().add("advanced-list-box-content");
+
+        this.addEventFilter(MouseEvent.MOUSE_ENTERED, event -> {
+            if (container.getHeight() > getHeight())
+                setVbarPolicy(ScrollBarPolicy.AS_NEEDED);
+        });
+        this.addEventFilter(MouseEvent.MOUSE_EXITED,
+                event -> setVbarPolicy(ScrollBarPolicy.NEVER));
     }
 
     public AdvancedListBox add(Node child) {