From 3894abf6579c174f22ec2b1a22dc4273a9eae2cc Mon Sep 17 00:00:00 2001
From: Johannes Wolf <mail@johannes-wolf.com>
Date: Wed, 25 Dec 2024 22:40:49 +0100
Subject: [PATCH] AbilityPicker Empty Selection Error

Do not call objectMouseClicked with an empty
selection.

Handle selection clamping in a ListSelectionListener.

Fixes #13148
---
 .../components/ability/AbilityPicker.java     | 29 ++++++++++---------
 1 file changed, 16 insertions(+), 13 deletions(-)

diff --git a/Mage.Client/src/main/java/mage/client/components/ability/AbilityPicker.java b/Mage.Client/src/main/java/mage/client/components/ability/AbilityPicker.java
index 66ddd3135d93..436bfd497af4 100644
--- a/Mage.Client/src/main/java/mage/client/components/ability/AbilityPicker.java
+++ b/Mage.Client/src/main/java/mage/client/components/ability/AbilityPicker.java
@@ -17,6 +17,8 @@
 import org.mage.card.arcane.ManaSymbols;
 
 import javax.swing.*;
+import javax.swing.event.ListSelectionEvent;
+import javax.swing.event.ListSelectionListener;
 import java.awt.*;
 import java.awt.event.*;
 import java.util.List;
@@ -152,7 +154,7 @@ private void initComponents() {
         setBackgroundPainter(mwPanelPainter);
 
         title = new ColorPane();
-        title.setFont(new Font("Times New Roman", 1, sizeMod(15)));
+        title.setFont(new Font("Times New Roman", Font.BOLD, sizeMod(15)));
         title.setEditable(false);
         title.setFocusCycleRoot(false);
         title.setOpaque(false);
@@ -186,11 +188,14 @@ private void initComponents() {
         rows.addMouseListener(new MouseAdapter() {
             @Override
             public void mousePressed(MouseEvent evt) {
-                if (SwingUtilities.isLeftMouseButton(evt)) {
+                if (SwingUtilities.isLeftMouseButton(evt) && !rows.isSelectionEmpty()) {
                     objectMouseClicked(evt);
                 }
             }
         });
+            }
+        });
+
         rows.setSelectedIndex(0);
         rows.setFont(new Font("Times New Roman", 1, sizeMod(17)));
         rows.setBorder(BorderFactory.createEmptyBorder());
@@ -233,18 +238,16 @@ public void mousePressed(MouseEvent evt) {
 
     @Override
     public void mouseWheelMoved(MouseWheelEvent e) {
-        int notches = e.getWheelRotation();
-        int index = rows.getSelectedIndex();
-
-        if (notches < 0) {
-            if (index > 0) {
-                rows.setSelectedIndex(index - 1);
-                rows.repaint();
-            }
-        } else if (index < choices.size() - 1) {
-            rows.setSelectedIndex(index + 1);
-            rows.repaint();
+        int direction = e.getWheelRotation() < 0 ? -1 : +1;
+        int index = rows.getSelectedIndex() + direction;
+        if (index < 0) {
+            index = 0;
+        } else if (index >= choices.size()) {
+            index = choices.size() - 1;
         }
+
+        rows.setSelectedIndex(index);
+        rows.repaint();
     }
 
     private void objectMouseClicked(MouseEvent event) {