Sicherung

FSI.Lib/NLogViewer/Helper/AutoSizedGridView.cs

@@ -0,0 +1,43 @@
+using System;
+using System.Reactive.Linq;
+using System.Threading;
+using System.Windows.Controls;
+using NLog;
+
+namespace DJ.Helper
+{
+    /// <summary>
+    /// Represents a view mode that displays data items in columns for a System.Windows.Controls.ListView control with auto sized columns based on the column content
+    /// Used to fix the column width: https://stackoverflow.com/questions/60147905/column-width-adjustment-is-broken-if-using-multibinding-on-displaymemberbinding
+    /// </summary>
+    public class AutoSizedGridView : GridView
+    {
+        private int _MaxLoggerNameLength;
+
+        protected override void PrepareItem(ListViewItem item)
+        {
+            if (item.DataContext is LogEventInfo info)
+            {
+                if (info.LoggerName.Length > _MaxLoggerNameLength)
+                {
+                    _MaxLoggerNameLength = info.LoggerName.Length;
+                    Observable.Timer(TimeSpan.FromMilliseconds(1)).ObserveOn(SynchronizationContext.Current).Subscribe(l =>
+                    {
+                        foreach (GridViewColumn column in Columns)
+                        {
+                            //setting NaN for the column width automatically determines the required width enough to hold the content completely.
+                            //if column width was set to NaN already, set it ActualWidth temporarily and set to NaN. This raises the property change event and re computes the width.
+                            if (double.IsNaN(column.Width))
+                            {
+                                column.Width = column.ActualWidth;
+                                column.Width = double.NaN;
+                            }
+                        }
+                    });
+                }
+            }
+            
+            base.PrepareItem(item);
+        }
+    }
+}