From 47206f0fd8396d5fa1fec54174e0d323f24714cd Mon Sep 17 00:00:00 2001
From: Rob Greene <robgreene@gmail.com>
Date: Wed, 1 Nov 2023 18:01:12 -0500
Subject: [PATCH] Attempted patch for issue #89

---
 .../com/webcodepro/applecommander/ui/swt/DiskMapTab.java  | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/lib/ac-swt-common/src/main/java/com/webcodepro/applecommander/ui/swt/DiskMapTab.java b/lib/ac-swt-common/src/main/java/com/webcodepro/applecommander/ui/swt/DiskMapTab.java
index affcc00..1cb4cef 100644
--- a/lib/ac-swt-common/src/main/java/com/webcodepro/applecommander/ui/swt/DiskMapTab.java
+++ b/lib/ac-swt-common/src/main/java/com/webcodepro/applecommander/ui/swt/DiskMapTab.java
@@ -297,7 +297,13 @@ public class DiskMapTab {
 			xpos[i] = (i * area.width) / xdim + 1;
 		}
 		xpos[xdim] = area.width;
-		
+
+		if (area.width <= 0 || area.height <= 0) {
+			// patch for issue #89
+			// based on stack trace it appears the bounds area may be invalid
+			// under some circumstances
+			return;
+		}
 		Image image = new Image(canvas.getDisplay(), area);
 		GC gc = new GC(image);
 		int x = 0;