From 7d1d2bfb8c557a4933eaa3e61c045861b38fd3c0 Mon Sep 17 00:00:00 2001
From: Koen van der Heide <koenjvanderheide@gmail.com>
Date: Thu, 28 May 2026 15:21:00 +0200
Subject: [PATCH] Guard visual font setup without graphics context

getGraphics() can return null before the panel has a graphics context. Keep the existing default-font fallback by only applying visual styles when a Graphics2D is available.
---
 forester/java/src/org/forester/archaeopteryx/TreePanel.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/forester/java/src/org/forester/archaeopteryx/TreePanel.java b/forester/java/src/org/forester/archaeopteryx/TreePanel.java
index ce90606c..77cc94f7 100644
--- a/forester/java/src/org/forester/archaeopteryx/TreePanel.java
+++ b/forester/java/src/org/forester/archaeopteryx/TreePanel.java
@@ -4483,7 +4483,7 @@ final void calculateLongestExtNodeInfo() {
             }
             boolean use_vis = false;
             final Graphics2D g = (Graphics2D) getGraphics();
-            if (getControlPanel().isUseVisualStyles()) {
+            if ((g != null) && getControlPanel().isUseVisualStyles()) {
                 use_vis = setFont(g, node, false);
             }
             if (!use_vis) {