memorize nonassigned state by unsetting panel reference

openjump-gis · Sep 22, 2022 · 32430e8 · 32430e8
1 parent d8955da
commit 32430e8
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/src/com/vividsolutions/jump/workbench/ui/cursortool/QuasimodeTool.java b/src/com/vividsolutions/jump/workbench/ui/cursortool/QuasimodeTool.java
@@ -316,7 +316,10 @@ public void activate(final LayerViewPanel panel) {
 
   public void deactivate() {
     super.deactivate();
-    panel.getWorkBenchFrame().removeEasyKeyListener(keyListener);
+    if (panel != null) {
+      panel.getWorkBenchFrame().removeEasyKeyListener(keyListener);
+      this.panel = null;
+    }
   }
 
   // same as below, just does not alter key assignments but represents pressed keys instead