From 844c332f108aba635608f13dedf2b08777b3a477 Mon Sep 17 00:00:00 2001
From: gmungoc <g.m.carstairs@dundee.ac.uk>
Date: Thu, 23 Mar 2017 15:10:52 +0000
Subject: [PATCH] JAL-2464 fix cancel tree print behaviour

---
 src/jalview/gui/TreeCanvas.java |   11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/jalview/gui/TreeCanvas.java b/src/jalview/gui/TreeCanvas.java
index 54eed1a..9a38d4c 100755
--- a/src/jalview/gui/TreeCanvas.java
+++ b/src/jalview/gui/TreeCanvas.java
@@ -549,7 +549,16 @@ public class TreeCanvas extends JPanel implements MouseListener, Runnable,
   public void run()
   {
     PrinterJob printJob = PrinterJob.getPrinterJob();
-    PageFormat pf = printJob.pageDialog(printJob.defaultPage());
+    PageFormat defaultPage = printJob.defaultPage();
+    PageFormat pf = printJob.pageDialog(defaultPage);
+
+    if (defaultPage == pf)
+    {
+      /*
+       * user cancelled
+       */
+      return;
+    }
 
     printJob.setPrintable(this, pf);
 
-- 
1.7.10.2