[client] do not enable download button when en invalid image is selected

1 files changed, 4 insertions, 5 deletions

diff --git a/dozentenmodul/src/main/java/org/openslx/dozmod/gui/window/ImageListWindow.java b/dozentenmodul/src/main/java/org/openslx/dozmod/gui/window/ImageListWindow.java
index 402f1223..01f0ecfc 100644
--- a/dozentenmodul/src/main/java/org/openslx/dozmod/gui/window/ImageListWindow.java
+++ b/dozentenmodul/src/main/java/org/openslx/dozmod/gui/window/ImageListWindow.java
@@ -44,7 +44,7 @@ public class ImageListWindow extends ImageListWindowLayout implements DownloadCa
 	public final ImageListWindow me = this;
 
 	/**
-	 * 
+	 * The image table held by the ImageListViewer
 	 */
 	public final ImageTable imageTable = imageListViewer.getImageTable();
 	
@@ -61,8 +61,6 @@ public class ImageListWindow extends ImageListWindowLayout implements DownloadCa
 	public ImageListWindow() {
 		super();
 
-		
-
 		/**
 		 * Popup menu for the version table on the right side
 		 */
@@ -234,8 +232,9 @@ public class ImageListWindow extends ImageListWindowLayout implements DownloadCa
 	 * @param item the image to check the user's permissions for
 	 */
 	private void updateAvailableOptions(ImageSummaryRead item) {
-		boolean download = ImagePerms.canDownload(item);
-		boolean link = ImagePerms.canLink(item);
+		boolean isValid = item != null && item.getLatestVersionId() != null;
+		boolean download = isValid && ImagePerms.canDownload(item);
+		boolean link = isValid && ImagePerms.canLink(item);
 		boolean admin = ImagePerms.canAdmin(item);
 		downloadButton.setEnabled(download);
 		newLectureButton.setEnabled(link);