From ba8a50278d01e73bd9b00d92f2aa2ac7ad7543ae Mon Sep 17 00:00:00 2001
From: SiboVG <sibo.vangool@hotmail.com>
Date: Wed, 23 Aug 2023 22:30:56 +0200
Subject: [PATCH] Don't enable OBJ exporting when no massive components
 selected

---
 .../sf/openrocket/gui/main/RocketActions.java   | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/swing/src/net/sf/openrocket/gui/main/RocketActions.java b/swing/src/net/sf/openrocket/gui/main/RocketActions.java
index 5ee3324c1..21aba0b4e 100644
--- a/swing/src/net/sf/openrocket/gui/main/RocketActions.java
+++ b/swing/src/net/sf/openrocket/gui/main/RocketActions.java
@@ -1236,7 +1236,22 @@ public class RocketActions {
 		@Override
 		public void clipboardChanged() {
 			List<RocketComponent> components = selectionModel.getSelectedComponents();
-			this.setEnabled(!components.isEmpty());
+			boolean containsMassiveComponent = containsMassiveComponent(components);
+			this.setEnabled(containsMassiveComponent);
+		}
+
+		private static boolean containsMassiveComponent(List<RocketComponent> components) {
+			for (RocketComponent component : components) {
+				if (component.isMassive()) {
+					return true;
+				}
+				for (RocketComponent child : component.getAllChildren()) {
+					if (child.isMassive()) {
+						return true;
+					}
+				}
+			}
+			return false;
 		}
 	}