Merge pull request #487 from rwth-acis/drag-and-drop/delete-issues-fr…

…om-kanbanboard

cards now get removed from kanban board when dragging issue out

Frontend/VIAProMa/Assets/Scripts/Shelf/Widgets/CopyMover.cs

@@ -3,8 +3,10 @@
 using i5.VIAProMa.ResourceManagagement;
 using i5.VIAProMa.UI.ListView.Issues;
 using i5.VIAProMa.Utilities;
+using i5.VIAProMa.Visualizations;
 using Microsoft.MixedReality.Toolkit.Input;
 using Microsoft.MixedReality.Toolkit.UI;
+using System.Collections.Generic;
 using Photon.Pun;
 using UnityEngine;
 
@@ -130,8 +132,19 @@ public void OnPointerUp(MixedRealityPointerEventData eventData)
             // if yes, the instantiation went to plan
             if (handlerOnCopy != null)
             {
+                //if parent has Visualization component, this issue card is inside a Kanban Board
+                Visualization visualization = transform.GetComponentInParent<Visualization>();
+                IssueDataDisplay issueDataDisplay = transform.GetComponentInParent<IssueDataDisplay>();
+                if(visualization != null && issueDataDisplay != null)
+                {
+                    List<Issue> issueList = new List<Issue>(visualization.ContentProvider.Issues);
+                    //done this way because just adding an element doesn't update the visualization
+                    issueList.Remove(issueDataDisplay.Content);
+                    visualization.ContentProvider.Issues = issueList;
+                }
+
                 handlerOnCopy.OnPointerUp(eventData);
             }
         }
     }
-}
+}