Changeset 17276 for trunk/HeuristicLab.Problems.DataAnalysis.Views/3.4/Classification/ClassificationSolutionVariableImpactsView.cs

Timestamp:

09/27/19 10:14:28 (5 years ago)

Author:

fholzing

Message:

#2973: Changed cancelation-initiation from VisibleChanged to OnHidden and added a flag, preventing an error in case the View gets closed.

File:

• trunk/HeuristicLab.Problems.DataAnalysis.Views/3.4/Classification/ClassificationSolutionVariableImpactsView.cs (modified) (4 diffs)

trunk/HeuristicLab.Problems.DataAnalysis.Views/3.4/Classification/ClassificationSolutionVariableImpactsView.cs

@@ -40 +40 @@
     private CancellationTokenSource cancellationToken = new CancellationTokenSource();
     private List<Tuple<string, double>> rawVariableImpacts = new List<Tuple<string, double>>();
+    private bool attachedToProgress = false;
 
     public new IClassificationSolution Content {
@@ -86 +87 @@
       }
     }
-    private void ClassificationSolutionVariableImpactsView_VisibleChanged(object sender, EventArgs e) {
+    protected override void OnHidden(EventArgs e) {
+      base.OnHidden(e);
       cancellationToken.Cancel();
+
+      if (attachedToProgress) {
+        Progress.Hide(this);
+        attachedToProgress = false;
+      }
     }
 
@@ -126 +133 @@
       variableImpactsArrayView.Caption = Content.Name + " Variable Impacts";
       progress = Progress.Show(this, "Calculating variable impacts for " + Content.Name);
+      attachedToProgress = true;
       cancellationToken = new CancellationTokenSource();
 
@@ -144 +152 @@
         UpdateOrdering();
       } finally {
-        Progress.Hide(this);
+        if (attachedToProgress) {
+          Progress.Hide(this);
+          attachedToProgress = false;
+        }
       }
     }