Update alchemist-swingui/src/main/java/it/unibo/alchemist/boundary/swingui/monitor/impl/Generic2DDisplay.java

DanySK · Copilot · DanySK · commit fa93b27ff57c · 2026-04-30T11:16:20.000+02:00
Co-authored-by: Copilot &lt;175728472+Copilot@users.noreply.github.com&gt;
diff --git a/alchemist-swingui/src/main/java/it/unibo/alchemist/boundary/swingui/monitor/impl/Generic2DDisplay.java b/alchemist-swingui/src/main/java/it/unibo/alchemist/boundary/swingui/monitor/impl/Generic2DDisplay.java
@@ -421,12 +421,13 @@ private void moveSelectedNodesOnView(final Map<Node<T>, Point> onView) {
             return;
         }
         for (final Node<T> node : selectedNodes) {
-            if (onView.containsKey(node)) {
+            final Point point = onView.get(node);
+            if (point != null) {
                 onView.put(
                     node,
                     new Point(
-                        onView.get(node).x + (endingPoint.x - originPoint.x),
-                        onView.get(node).y + (endingPoint.y - originPoint.y)
+                        point.x + (endingPoint.x - originPoint.x),
+                        point.y + (endingPoint.y - originPoint.y)
                     )
                 );
             }

Original file line number	Diff line number	Diff line change
`@@ -421,12 +421,13 @@ private void moveSelectedNodesOnView(final Map<Node<T>, Point> onView) {`
`421`	`421`	`return;`
`422`	`422`	`}`
`423`	`423`	`for (final Node<T> node : selectedNodes) {`
`424`		`- if (onView.containsKey(node)) {`
	`424`	`+ final Point point = onView.get(node);`
	`425`	`+ if (point != null) {`
`425`	`426`	`onView.put(`
`426`	`427`	`node,`
`427`	`428`	`new Point(`
`428`		`- onView.get(node).x + (endingPoint.x - originPoint.x),`
`429`		`- onView.get(node).y + (endingPoint.y - originPoint.y)`
	`429`	`+ point.x + (endingPoint.x - originPoint.x),`
	`430`	`+ point.y + (endingPoint.y - originPoint.y)`
`430`	`431`	`)`
`431`	`432`	`);`
`432`	`433`	`}`