From a505534197b0b549996956ccfffe44d406344612 Mon Sep 17 00:00:00 2001
From: Jan S <jpstotz@users.noreply.github.com>
Date: Tue, 26 Apr 2022 18:27:39 +0200
Subject: [PATCH] fix(gui): fix IndexOutOfBoundsException when switching
 between tabs via mouse wheel (#1456)(PR #1469)

---
 .../src/main/java/jadx/gui/ui/TabbedPane.java | 24 ++++++++++++-------
 1 file changed, 15 insertions(+), 9 deletions(-)

diff --git a/jadx-gui/src/main/java/jadx/gui/ui/TabbedPane.java b/jadx-gui/src/main/java/jadx/gui/ui/TabbedPane.java
index 2ca0fc6d4..65ad47836 100644
--- a/jadx-gui/src/main/java/jadx/gui/ui/TabbedPane.java
+++ b/jadx-gui/src/main/java/jadx/gui/ui/TabbedPane.java
@@ -54,20 +54,26 @@ public class TabbedPane extends JTabbedPane {
 
 		setTabLayoutPolicy(JTabbedPane.SCROLL_TAB_LAYOUT);
 
-		addMouseWheelListener(e -> {
-			if (openTabs.isEmpty()) {
+		addMouseWheelListener(event -> {
+			int direction = event.getWheelRotation();
+			if (openTabs.isEmpty() || direction == 0) {
 				return;
 			}
-			int direction = e.getWheelRotation();
+			direction = (direction < 0) ? -1 : 1; // normalize direction
 			int index = getSelectedIndex();
 			int maxIndex = getTabCount() - 1;
-			if ((index == 0 && direction < 0)
-					|| (index == maxIndex && direction > 0)) {
-				index = maxIndex - index;
-			} else {
-				index += direction;
+			index += direction;
+			// switch between first tab <-> last tab
+			if (index < 0) {
+				index = maxIndex;
+			} else if (index > maxIndex) {
+				index = 0;
+			}
+			try {
+				setSelectedIndex(index);
+			} catch (IndexOutOfBoundsException e) {
+				// ignore error
 			}
-			setSelectedIndex(index);
 		});
 		interceptTabKey();
 		enableSwitchingTabs();