[client] Sanity checks in LectureDetailsWindow

1 files changed, 10 insertions, 2 deletions

diff --git a/dozentenmodul/src/main/java/org/openslx/dozmod/gui/window/LectureDetailsWindow.java b/dozentenmodul/src/main/java/org/openslx/dozmod/gui/window/LectureDetailsWindow.java
index f313df22..b8caf9ec 100644
--- a/dozentenmodul/src/main/java/org/openslx/dozmod/gui/window/LectureDetailsWindow.java
+++ b/dozentenmodul/src/main/java/org/openslx/dozmod/gui/window/LectureDetailsWindow.java
@@ -39,6 +39,7 @@ import org.openslx.dozmod.gui.helper.MessageType;
 import org.openslx.dozmod.gui.helper.UiFeedback;
 import org.openslx.dozmod.gui.window.UserListWindow.UserAddedCallback;
 import org.openslx.dozmod.gui.window.layout.LectureDetailsWindowLayout;
+import org.openslx.dozmod.permissions.ImagePerms;
 import org.openslx.dozmod.permissions.LecturePerms;
 import org.openslx.dozmod.permissions.PermissionDefaultToCustomLink;
 import org.openslx.dozmod.thrift.Session;
@@ -220,9 +221,12 @@ public class LectureDetailsWindow extends LectureDetailsWindowLayout implements
 	 * @param forceRefresh
 	 */
 	private void refresh(boolean forceRefresh) {
+		if (lecture == null)
+			return;
 		String lectureId = lecture.getLectureId();
 		synchronized (me) {
 			lecture = null;
+			image = null;
 		}
 		setLecture(lectureId);
 	}
@@ -239,8 +243,10 @@ public class LectureDetailsWindow extends LectureDetailsWindowLayout implements
 						synchronized (me) {
 							lecture = lectureDetails;
 							image = imageDetails;
-							permissionMap = ThriftActions.getLecturePermissions(
-									JOptionPane.getFrameForComponent(me), lecture.lectureId);
+							if (lecture != null) {
+								permissionMap = ThriftActions.getLecturePermissions(
+										JOptionPane.getFrameForComponent(me), lecture.lectureId);
+							}
 						}
 						fill();
 					}
@@ -252,6 +258,7 @@ public class LectureDetailsWindow extends LectureDetailsWindowLayout implements
 	 */
 	private void fill() {
 		if (lecture == null) {
+			txtTitle.setText("-");
 			makeEditable(false);
 			return;
 		}
@@ -594,6 +601,7 @@ public class LectureDetailsWindow extends LectureDetailsWindowLayout implements
 		startTime.setEnabled(editable);
 		endDate.setEnabled(editable);
 		endTime.setEnabled(editable);
+		btnDownloadImage.setEnabled(ImagePerms.canDownload(image));
 	}
 
 	/**