JAL-4217 wrap imageExport CLI method's call to imageExport in a separate thread and...

[jalview.git] / src / jalview / gui / ImageExporter.java

diff --git a/src/jalview/gui/ImageExporter.java b/src/jalview/gui/ImageExporter.java
index f337b39..4ea30d9 100644 (file)
--- a/src/jalview/gui/ImageExporter.java
+++ b/src/jalview/gui/ImageExporter.java
@@ -124,6 +124,11 @@ public class ImageExporter
      */
     if (file == null && !Jalview.isHeadlessMode())
     {
+      if (Desktop.instance.isInBatchMode())
+      {
+        // defensive error report - we could wait for user input.. I  guess ?
+        throw(new ImageOutputException("Need an output file to render to when exporting images in batch mode!"));
+      }
       JalviewFileChooser chooser = imageType.getFileChooser();
       chooser.setFileView(new JalviewFileView());
       MessageManager.formatMessage("label.create_image_of",